Powerplay rules across formats: ODI and T20 restrictions

Take away every fielding restriction from a fifty-over match and here is what a competent captain does. Nine fielders go to the boundary rope, spaced evenly, and stay there. Singles are conceded without argument. Nobody hits a four, because there is nowhere for a four to go, and a well-struck cover drive is worth exactly as much as a nudge to point. The innings becomes a long negotiation about ones, played out over three hundred deliveries, and the ground empties.

That is not a thought experiment. It is roughly what early one-day cricket started to look like once captains worked out the arithmetic, and it is the reason the powerplay rules across formats exist at all. The restriction is not there to be fair to batters. It is there to protect the spectacle. A limited-overs innings is a product, sold to a crowd and a broadcaster, and the fielding restriction is the clause in the rules that stops the product being ruined by people playing it correctly.

Once you see it that way, everything downstream makes sense. The phases of a modern innings, the anchor and the finisher, the value of wickets in hand, the entire vocabulary of white-ball strategy: all of it is the consequence of a painted line on the grass and a rule about how many people may stand outside it.

What a fielding restriction is actually doing

A fielding restriction does one thing. It forces a fixed number of fielders to stand where they can be hit past, which guarantees that boundary sectors are open, which makes the aggressive shot mathematically worth attempting.

Nothing else in the rule book does that job. Wides and no balls punish bad bowling, not defensive fielding. Over limits cap how much of the innings your best bowler can consume. Only the circle addresses the underlying problem, which is that in a game with a fixed number of deliveries the fielding side's optimal strategy is to make every delivery boring.

The mechanism is narrower than the usual summary of it. The restriction is not simply "fielders must be inside the circle so batters can score". It removes bodies from the outfield, and an outfield with two fielders in it has enormous undefended sectors. A batter who clears the infield in the first over of an ODI does not need to find a gap. There is almost nothing but gap. The value of the shot rises, so the risk becomes worth taking, so the batter takes it, so the game is watchable.

Then the restriction relaxes, the outfield fills, the value of the same shot falls, and the batting side has to find a different way to score. That shift, repeated at fixed points in the innings, is what creates phases. Phases are not a coaching invention. They are the shape the rule leaves behind.

Two circles, and what each of them is for

Most people know about one circle. There are two, and they do different jobs.

The thirty-yard circle is the one you can see on television. Two semicircles of thirty yards radius, centred on the middle stump at each end, joined by two straight lines parallel to the pitch, usually marked with painted discs rather than a continuous line so that the ball is not deflected. Every fielding restriction in limited-overs cricket is written in terms of this shape: so many fielders inside it, so many permitted outside.

The test is applied at one instant only, the moment of delivery. Where a fielder runs afterwards is nobody's business. This is not a loophole, it is a designed feature, and sides use it constantly. A fielder starts a stride inside the line, sets off as the bowler enters his delivery stride, and is fifteen yards deeper by the time the batter plays. In the last few overs of a T20 innings, a ring fielder on the off side may effectively be a boundary rider for every ball he is not required to save the single from. The rule constrains the starting position, not the play.

The fifteen-yard circle is the one nobody points a camera at. Two more semicircles, fifteen yards radius, centred on the middle stump at each end. It exists to define what counts as a close catching position, because "close catcher" needs a boundary if a playing condition is going to require one. Where a competition mandates that a minimum number of fielders stand in catching positions during the opening overs, this is the shape that decides whether a fielder qualifies. The requirement has come and gone from various sets of playing conditions over the years and it is not identical across competitions, so if you want to know whether it applies to a particular tournament, that tournament's published playing conditions are the only reliable answer.

The distinction between the two circles matters because they push in opposite directions. The thirty-yard circle is about scoring: it guarantees gaps. The fifteen-yard circle, where a competition uses it, is about wickets: it obliges the fielding side to keep men in positions where a catch is possible rather than retreating everyone to saving-one distance. One protects the batter's upside, the other protects the bowler's.

Two further limits apply on top, and they are not powerplay rules at all. The Laws permit no more than two fielders behind square on the leg side at the instant of delivery, which is what stops a captain ringing the leg-side boundary behind a batter and bowling short at him. In international cricket the playing conditions add a limit of five fielders on the leg side in total. Breaching either is a no ball, and in competitions where every no ball brings a free hit, the cost of miscounting is two deliveries rather than one.

• 30Radius of the inner circle, in yards
• 15Radius of the close-catching circle, in yards
• 9Outfielders a captain actually places
• 2Fielders allowed behind square on the leg side

Rule-defined values from the Laws and the ICC playing conditions. The bowler and the wicketkeeper are excluded from the count of placeable fielders.

Nine is the number to hold on to. The bowler is placed by his run-up and the keeper by his trade, so a captain has nine bodies and a rule telling him how many of them must stand within a marked oval. Every fielding restriction is a tax on that budget of nine, and every tactical decision in this article is somebody deciding how to pay it.

The powerplay rules across formats, in one picture

The three standard limited-overs formats each split the innings differently, and the differences are the whole story.

ODI, overs 1-102

ODI, overs 11-404

ODI, overs 41-505

T20, overs 1-62

T20, overs 7-205

Hundred, first 25 balls2

Hundred, remaining 755

ODI and T20 values from the ICC playing conditions. The Hundred's phase is measured in balls rather than overs and is set by the ECB's competition regulations. Domestic competitions vary, so check the relevant playing conditions.

Show the numbers

Fielders permitted outside the circle, by phase

Item	Fielders allowed outside
ODI, overs 1-10	2
ODI, overs 11-40	4
ODI, overs 41-50	5
T20, overs 1-6	2
T20, overs 7-20	5
Hundred, first 25 balls	2
Hundred, remaining 75	5

Every one of those bars is the same restriction at a different setting. Two out is the tightest, five out is the loosest, and the interesting question is never what the number is but what happens in the over where it changes.

The ODI innings, phase by phase

Fifty overs, three phases, two transitions. The transitions are where the batting side's plan has to change, and a side that does not change it hands the bowling captain a free period of the innings.

1. 1Overs 1 to 10, two fielders outThe outfield is almost empty and the ball is at its hardest. Boundaries are cheap for anyone who middles it, and edges carry to the keeper. Both sides attack, which is why this phase carries the highest scoring rate and the highest dismissal rate at the same time.
2. 2The first transition, into over 11Two more fielders go out. The square boundaries close, the straight ones usually stay guarded, and the shot that was worth four in the tenth over is worth one in the eleventh. A pair that keeps playing the powerplay's shots here gets caught in the deep and blames the pitch.
3. 3Overs 11 to 40, four fielders outFive in the ring, four out, thirty overs of it. Boundaries have to be manufactured rather than found. The scoring unit becomes the single and the converted two, and the wicket becomes a resource being spent or saved for the final phase.
4. 4The second transition, into over 41A fifth fielder goes out and the ring drops to four. Every sector is now covered by somebody, but the ring is thin enough that a well-run two is available almost everywhere. The batting side switches from protecting wickets to spending them.
5. 5Overs 41 to 50, five fielders outTen overs, sixty deliveries, and a batting side with wickets in hand can attack all of them. The bowling captain is no longer trying to take wickets except by accident. He is trying to concede the smallest number of boundaries while five men patrol the rope and four save the single.

The over numbers are from the ICC playing conditions. What each transition does to the batting plan is the tactical consequence, not a rule.

The two transitions are not symmetrical, and that asymmetry is underrated. Going from two out to four out is a shock: the number of outfielders doubles in one ball. Going from four to five is a nudge, and it is not even the important thing happening at over forty-one, because what actually changes is the batting side's willingness to lose wickets. The rule moves by one fielder. The behaviour moves by a great deal more.

The ODI powerplay is a spending decision, not a free hit

With two fielders permitted outside, a captain chooses two boundary positions from a possible dozen and writes off the rest. That is a harsher constraint than it sounds. He is not protecting a boundary; he is protecting a sector, perhaps a fifth of the rope, and conceding the other four fifths.

The traditional answer is a fielder at third man and one at fine leg, covering the two areas behind square where an edge or a deflection runs away fastest. That arrangement keeps the ring intact in front of the wicket, which is where a new-ball bowler wants his fielders, and it accepts that anything driven past the infield is four. The modern answer is more varied. Against a batter who ramps and steers, third man is close to compulsory. Against one who hits straight, a captain may put a man at long off in the fourth over of a fifty-over match and take the criticism, because a single boundary rider in the right place changes which shot the batter is prepared to attempt. If the names of those positions are a blur, the coordinate system behind every fielding position makes them readable in about ten minutes, and this article assumes them from here on.

22%56%22%

• Catching band, slip and short leg side2
• Ring, saving one and stopping the drive5
• Boundary, the two permitted2

An illustrative arrangement of the nine outfielders during the first ten overs, not a transcription of a particular match. The bowler and the wicketkeeper are not counted.

Show the numbers

A constructed ODI powerplay field, by band

Item	Value
Catching band, slip and short leg side	2
Ring, saving one and stopping the drive	5
Boundary, the two permitted	2

Read that split and you can see the trade the rule imposes. Seven of the nine fielders are inside the circle because they have to be, and the captain has chosen to convert two of those seven into catchers rather than savers. That is the powerplay's real decision. The number outside is fixed by the playing conditions. The split of the seven inside, between men positioned for a mistake and men positioned for a good shot, is entirely his, and it is the clearest statement he makes all innings about whether he thinks he can take wickets.

Captains who withdraw the slip at the first boundary usually never post it again. The ball is only new once.

Twenty20 is the same idea with the middle taken out

Six overs at two fielders out, fourteen overs at five. No middle band, no intermediate step, nothing between the tightest setting in the game and the loosest.

That is why T20 feels so different to bat in, and it is a structural difference rather than a cultural one. In an ODI the innings loosens in two stages, and a batting side that misjudges the first transition still has thirty overs to recover its footing. In a T20 the field goes from two out to five out between the last ball of the sixth over and the first ball of the seventh, and the same bowler bowling the same delivery to the same batter is suddenly a much harder proposition. Nothing about the bowling has improved. Three men moved.

The compression has a second effect that the raw numbers hide. Six overs out of twenty is a larger share of a T20 innings than ten out of fifty is of an ODI, so the phase where boundaries are easiest occupies proportionally more of the game. That is a large part of why twenty-over cricket produces the scoring rates it does, and why a side that wastes the powerplay in a T20 rarely recovers: it has lost a bigger fraction of its cheap runs, with fewer deliveries left to make them up in.

Most T20 competitions bolt an over-rate mechanism onto the restriction. If the fielding side is not in position to bowl the first ball of the final over by a set cut-off, a fielder must be brought inside the circle for the remainder of the innings. It is a far more effective deterrent than a fine paid weeks later, because it costs runs immediately and in front of the crowd. The exact trigger and the exact penalty differ between competitions, which is one of many places where the leagues have quietly diverged from each other and from the international game. Anyone following more than one of them should assume the details vary, as they do across the franchise circuit that now runs most of the year, and read the relevant playing conditions rather than the one they happen to know.

The Hundred counts balls instead of overs

The Hundred runs to a hundred balls an innings and measures its powerplay the same way, in balls rather than overs. The restriction itself is the familiar one, two fielders outside the circle during the opening phase and five thereafter, but the phase is defined as a number of deliveries because the competition's whole design refuses to use the over as its unit.

The effect on field settings is small. The effect on bowling plans is not, because bowlers deliver in blocks of five or ten balls from the same end, so the powerplay does not necessarily end at the boundary between two spells. A captain can be part way through a block when the field is allowed to spread. That is a genuinely different problem from the one an ODI or T20 captain solves, and it is one reason the format's tactics never quite converged with twenty-over cricket's. The ECB publishes the competition's playing conditions, and they are the place to check the phase lengths, which have been adjusted more than once.

What the powerplay used to be, and why the batting powerplay died

The three-phase ODI structure in the chart above is the settled version, not the original one. The rule has been rewritten repeatedly, and the failed experiments are more instructive than the successful ones.

For a long stretch the innings carried a mandatory opening block plus two optional five-over blocks, one at the fielding side's discretion and one at the batting side's. The batting powerplay was the interesting idea: give the side under pressure a lever to pull, let them choose the moment to force the field up, and reward good judgement.

It failed, and it failed in a way that tells you something about how sides actually behave. Batting teams treated the block as a liability rather than an asset. They delayed it as long as the conditions allowed, which pushed it towards the end of the innings, where it collided with the phase they were already planning to attack in. Then they took it, felt obliged to use it, played shots they were not set for, and lost wickets. Sides began to talk about the batting powerplay as something to survive. A rule intended to increase scoring was, often enough, producing collapses.

There is a general lesson in that. An optional restriction hands the choice to a side with every incentive to defer it, and deferral concentrates the risk instead of spreading it. The fix was to stop offering the option. The blocks were removed, the phases became fixed, and the innings acquired the clean three-part shape it has now.

The other change worth knowing is the number permitted outside the circle in the non-powerplay overs, which has moved between four and five in different eras. The direction of the effect is easy to state and does not require quoting a single total. Allowing an extra fielder out makes the middle overs harder to score in, lengthens the phase where singles dominate, and pushes the acceleration later. Bringing one back in does the reverse: it opens a sector, makes the aerial shot over the infield worth attempting earlier, and shifts run scoring forward in the innings. Every time the number has been adjusted, the shape of a typical innings has adjusted with it, which is the clearest available evidence that the restriction is doing the work rather than merely describing it.

Why the first ten overs produce a particular kind of bowling

An empty outfield changes what a bowler is trying to do, and not in the direction most people assume.

With two fielders out, the boundary is unprotected, so containment is not available. A bowler who tries to bowl dry in the first over of an ODI is bowling to a field that cannot support him: he has no sweeper, no long off, and a batter who middles anything can hit it into an acre of nothing. The only strategy the field supports is the one that takes wickets, which is why powerplay bowling is full, straight and attacking rather than defensive. The bowler is not conceding the boundary reluctantly. He has been told by the rules that it is coming, so he may as well buy a chance with it.

This is why the same phase is simultaneously the best in the innings for batting and the best for bowling. Both sides attack because the rule leaves neither of them a defensive option worth taking. A powerplay economy rate that would be a disaster in the middle overs is unremarkable in the first ten, and a wicket in the first ten is worth more than one in the twenty-fifth, because it exposes a new batter to a hard ball and an attacking field. Judging a bowler's powerplay spell against his overall figures is one of the standard errors in reading white-ball statistics, and the reason economy and strike rate have to be read phase by phase rather than as career aggregates is set out in the piece on what a bowler's economy, average and strike rate each actually measure.

The risk profile for the batter is the mirror image. The upside of an attacking shot is at its highest, and so is the downside, because the edge that would drop short of a slip cordon in the fortieth over carries comfortably in the fifth. A powerplay is not a licence to hit. It is a period in which the price of every outcome, good and bad, has gone up.

The new ball, and why the restriction sharpens it

Two things happen at once at the start of a limited-overs innings, and they are usually discussed separately.

The ball is new. It is hard, the seam is proud, the lacquer is intact, and it swings and seams more than it will at any other point. Edges carry. The bounce is at its most reliable, so the good length delivery is genuinely dangerous rather than merely tidy.

The field is restricted. Seven fielders must stand inside the circle, and a captain who wants catchers can afford them without giving up his boundary protection, because he has almost no boundary protection to give up.

The combination is what makes the phase what it is. A new ball with a spread field is a wasted asset, because the movement produces edges and nobody is standing where edges go. A restricted field with an old ball is a batting exercise, because the movement is not there to punish the shot. Put them together and you get the only period in white-ball cricket where a bowling side can attack the way a Test side attacks, with catchers in place and a ball that finds the edge, while the batting side is being invited by the rules to play at it.

The asset decays fast. The lacquer goes, the seam flattens, the ball softens, and by the time the field spreads the bowler who was beating the outside edge is bowling into the pitch and hoping. That decay is why sides fight so hard over who bowls the first change, and why a captain's most consequential mistake is often bowling his best new-ball bowler for four overs when the ball was only really new for two.

The middle overs are where matches are actually won

For years the middle of a one-day innings was understood as a rest. Score quickly at the start, consolidate, accelerate at the end. The middle was a holding pattern with a scoreboard attached.

That reading collapsed under simple arithmetic. Overs eleven to forty are thirty overs, three fifths of the innings, played under one set of restrictions. A phase that large cannot be a transition between two other phases. It is the innings, and treating it as dead time meant leaving most of the game unplayed.

Three changes followed once sides took it seriously.

Strike rotation stopped being a courtesy and became a skill. Five in the ring and four out means singles exist but must be taken. Two or three dot balls an over, repeated across thirty overs, is a haemorrhage that never appears as a dramatic moment and decides the match anyway. Sides now train for it specifically, working on running hard for one, turning ones into twos into a thin outfield, and manipulating a field set precisely to make patience unprofitable. A batter's value in this phase is very poorly described by an average and only slightly better by a strike rate, which is why the two figures have to be read against each other rather than in isolation, as the comparison of batting average against strike rate works through.

Spin became the phase's defining weapon. Four fielders out is exactly enough protection for a spinner to attack. He can keep a catcher, guard the two straight boundaries and one square one, and still have men in the ring to make the sweep a risk rather than a free single. That is not true in the powerplay, where he has no boundary cover, and it is not true at the death, where he has no catcher. The middle overs are the only phase whose field settings suit spin, which is why they filled up with it.

Wickets became a currency with an exchange rate. A wicket in hand is permission to take risk later. A side entering the last ten with eight standing can attack every ball; a side entering with four can attack perhaps half of them, because a collapse turns a par total into an under-par one in three overs. Modern batting plans allocate wickets to phases in advance in the same way they allocate overs, and the middle is where that allocation is either defended or squandered.

The same logic runs through T20, compressed into overs seven to fifteen. Everybody knows how to bat in a six-over powerplay and everybody knows how to bowl a yorker at the death. What separates sides is the middle, and specifically whether a batting pair can keep the rate moving against five men on the rope without giving up a wicket to do it.

Spin inside the circle, and why it is a different job

Bowling spin during a powerplay is one of the genuinely hard things in cricket, and sides do it more than they used to for a reason worth understanding.

The problem is obvious. A spinner with two fielders out has no protection square of the wicket and none straight, and a batter who gets to the pitch of the ball can hit through the line into an empty outfield. The margin for a slightly short delivery is close to zero.

The compensations are less obvious and they are real. A hard new ball grips and bounces more off the surface than a soft one, so a finger spinner gets more from the pitch in the fourth over than in the thirtieth. A batter who has set himself for pace has to change his footwork immediately. And the field, tight as it is, keeps a catcher available at short cover or short midwicket, because the mishit off a spinner in the first ten overs lands in the infield rather than on the rope. The delivery that gets rewarded is the one that turns and bounces, not the one that is merely accurate, which is why wrist spin and the more aggressive finger spinners have found powerplay work and orthodox holding bowlers have not. Which variety a captain trusts in that phase depends heavily on which way the ball turns relative to the batter's handedness, a question the guide to the different kinds of spin bowling takes apart properly.

The reverse case is a spinner in the last ten overs of an ODI with five men out. That is a containment job with no catcher and no margin, and it is a specialist skill with very little in common with the one required in the middle.

The death is a separate trade entirely

The final phase is not the middle overs with more fielders out. It is a different game with a different objective, and treating it as continuous with what came before is how sides lose the last ten.

The bowling side has stopped trying to take wickets. Five men are on the rope, four in the ring, and a wicket is now a pleasant accident rather than a plan. The objective is to concede the smallest number of boundaries across the remaining deliveries, which means bowling to a field rather than to a batter. The wide yorker with a packed off side, and the short ball into the body with both permitted leg-side fielders back, are fields disguised as deliveries: the ball is chosen because of where the men are standing.

The batting side has stopped trying to preserve wickets. A batter with three overs left and six wickets in hand has almost nothing to lose by being dismissed, which flips the entire risk calculation that governed the previous thirty overs. That is what makes the death a separate skill rather than an intensification of an earlier one. A batter who is excellent in the middle overs is being asked to do the opposite of what he does well, on demand, against the best bowler the opposition has left.

Boundary counting is the whole exercise. With five out, a captain leaves three or four sectors of the rope undefended at any moment, and a good finisher is not hitting hard in a general direction. He has identified the sector before the bowler ran in and is trying to hit into it, which is why the good ones look like they are scoring effortlessly and the poor ones look like they are trying very hard. The good ones are aiming at a gap that is genuinely there.

The most common death-overs error by a fielding captain is spreading square first. The highest-percentage big shots against decent death bowling go down the ground, because the straight boundary is reachable off a mishit and because the yorker that misses its length is most easily hit back past the bowler. A man at long off covers the slog and the mishit at once. A man at deep point covers one shot played by one kind of batter.

What a captain trades by taking a bowler's over early

Every bowler in a limited-overs match has a hard ceiling, ten overs in an ODI and four in a T20, one fifth of the innings in each. Those overs are not interchangeable, because the phases they can be bowled in are not interchangeable, and this is the most consequential set of decisions a fielding captain makes.

Here is the trade in its bare form. If a captain uses his best bowler in the powerplay, he gets him against a new ball with catchers in place, at the moment when a wicket is worth most. He also spends overs that cannot be recovered, and somebody else, by definition somebody worse, will bowl at the death when five fielders are out and the batting side is swinging.

If he holds that bowler back, the last two overs are covered by his best option, and the powerplay is bowled by somebody who may leak the very runs the restriction was designed to make available.

There is no correct answer, only a set of considerations that shift the balance.

• Wicket-taking beats containment while the field is up. Overs in a restricted phase are worth spending on the bowler most likely to take a wicket, because the same delivery buys more in that phase than in any other.
• The best death bowler is often not the best bowler. Yorker execution under pressure is a narrow skill and does not track general quality. A side with a genuine specialist has a smaller allocation problem, because the specialist's overs are earmarked and the rest can be spent freely.
• A bowler used early can be used again. In a T20 a captain who bowls his best bowler in the first over usually intends to bring him back at fifteen, which costs less than it appears. In an ODI the ten overs can be split across all three phases, and the good captains treat the allocation as three separate budgets rather than one.
• The fifth bowler is the real constraint. Many collapses at the death trace back to an over bowled at the twelfth, when a captain used a frontline bowler to break a partnership and left himself a part-timer to cover the eighteenth. The moment of the mistake and the moment of the consequence are twenty minutes apart, which is why it keeps happening.

The batting side's mirror image of this calculation is simpler and just as important. A batting plan phrased as a phase target absorbs a bad over. One phrased ball by ball does not. Sixty in the powerplay for the loss of one survives a maiden. Hit the fourth ball for four produces a dismissal on the fifth.

How the restriction shapes who gets picked

Fielding restrictions do not only change what happens in a match. They change the composition of the side, and the effect runs deeper than the obvious point about needing a finisher.

Outfielders became specialists. With five men out at the death, a fielder who covers ten yards more than his replacement turns fours into twos across a whole phase, and the value of that is large enough that sides select for it. A boundary rider with a fast arm and a clean pick-up saves more runs across a season than most bowling changes do.

Ring fielders became a different specialism. Saving the single inside the circle in the middle overs is a job about anticipation and getting to the ball early, not about arm strength. Sides think about the ring and the rope as separate skill sets and pick accordingly.

All-rounders became necessary rather than fashionable. A captain who has to cover three phases with five bowlers, one of whom may have a bad day, is one injury or one poor over away from bowling a part-timer at the death. A sixth bowling option is insurance against the allocation problem above, and the reason sides tolerate a batting all-rounder whose bowling is unremarkable is that the option itself has value even if the overs are never used.

Batting orders acquired phase specialists. A powerplay batter, a middle-overs accumulator who can rotate against spin, and a finisher comfortable with a strike rate that would be indefensible at any other point in the innings. Those are three different jobs created by three different sets of fielding restrictions, and asking one player to do all three is how sides end up with a top order that cannot accelerate and a lower order that cannot bat.

Rain, reduced overs and the phase lengths

An innings cut short does not simply lose overs from the end. The phase lengths scale with it, using a table published in the competition's playing conditions, so a match reduced to a shorter innings has a proportionally shorter powerplay rather than the full one followed by a truncated middle.

The reason is straightforward. The restriction exists to guarantee that a certain share of the innings is played with an open outfield, and if the innings halves while the powerplay does not, the game becomes a different one. Scaling keeps the shape.

It also interacts with target setting in a way that catches people out. A revised target after a stoppage is calculated from resources remaining, not from a simple rate, and the phase structure is part of what makes those resources unequal across an innings. The reasoning behind that calculation, and why an over in the fortieth is not worth the same as an over in the fifth, is set out in the explanation of how revised targets are worked out after rain. A captain who does not know how the phases will be redrawn after a delay is making bowling changes with incomplete information, which is why somebody is usually carrying the playing conditions out to the middle.

Test cricket, and the case for having no powerplay at all

There are no fielding restrictions in Test or first-class cricket beyond the leg-side limits. A captain may put nine men on the rope, and occasionally does when a tail-ender is farming the strike.

The obvious question is why the format that gives captains total freedom does not collapse into the boundary-ringing tedium described at the top of this article. The answer is the win condition. A Test is not won by conceding fewer runs, it is won by taking twenty wickets, so a purely defensive field is self-defeating rather than optimal. The restriction that forces attacking cricket in a Test is written into the result, not into the playing conditions.

That is the cleanest way to see what the powerplay is for. Limited-overs cricket removed the requirement to bowl a side out, which removed the fielding captain's reason to attack, which obliged the rule book to put one back artificially. The circle is a patch for a consequence of the format. The full comparison of what each format asks of a side, and why the same eleven players behave so differently in each, is laid out in the side-by-side on what actually separates Tests, ODIs and T20s, and the rest of the tactical vocabulary that follows from these rules sits in the cricket section of this site.

Watch the fielders, not the bowler, when the phase changes

The most useful habit this article can leave you with costs nothing and works from any seat in the ground.

At the moment a restriction lifts, do not watch the bowler. Watch the two or three fielders who walk out to the rope. Which sectors the captain chooses to close is his whole plan for the next phase, stated in public, several seconds before a ball is bowled. A man sent to deep midwicket and another to long off says he expects the batter to hit straight and through the leg side, and that the bowler will be bowling to make him do it. Two men sent square on the off side says the opposite.

Then count. Two outside the circle means you are in a powerplay whatever the scoreboard graphic says. Four means the ODI middle. Five means either a T20 after the sixth over or the last ten of a fifty-over innings, and one glance at the scoreboard will tell you which.

In the closing overs, look at the fielders inside the ring rather than the ones on the rope. If they are pushing in to save the single, the bowling side believes the margin is narrow enough that ones matter. If they have dropped back towards the edge of the circle, the captain has decided ones are irrelevant and is trying to stop the two and the mishit that clears the infield. That adjustment tells you what the fielding side genuinely thinks the equation is, and it is usually visible a couple of overs before anybody says it out loud.

The restriction is the only part of cricket that is announced in advance and then drawn on the grass. Learn to read the nine bodies standing on it, and you are watching the same match the captains are.