Who Bowls This Over? The AI's Bowling Rotation Guide
Who is even eligible
Before it picks, the engine narrows the field. The wicketkeeper is out. The bowler who sent down the previous over is out, because nobody bowls consecutive overs. And anyone who has already bowled their full quota is out: four overs each in a T20, ten in a 50-over game. What is left is the pool of legal choices for this over.
The rules behind the quotas
In real cricket, two different rules shape every bowling plan. The Laws of Cricket say that no bowler may bowl two overs in a row, which is why a captain always needs at least two bowlers on the go. The playing conditions for each format then cap how much any one bowler can bowl: ten overs in a men's one-day international, four in a T20. Test cricket has no cap at all, which is why a Test captain can keep a spinner on for thirty overs in a day while a T20 captain has to find twenty overs from at least five people.
Those two rules turn bowling into arithmetic. A T20 side needs twenty overs, and no one can bowl more than four, so a captain with only four frontline bowlers must find four more overs from somewhere. Every choice about who bowls the first over affects who is left for the last. In a 50-over match the sums are the same with bigger numbers: fifty overs, ten each at most, so five bowlers at the very least.
Matching the bowler to the phase
From that pool the AI captain picks with the same instinct a real one would. A quick is a strong option in the powerplay and, above all, at the death, where pace and yorkers are the containing weapon; through the middle their edge is smaller. A spinner is the opposite: less useful in the powerplay against the hard new ball and field restrictions, but the natural middle-overs bowler. An all-rounder sits in between, most useful through the middle. Add it up over a full innings and you get exactly the shape you would expect: seam at the top and the death, spin squeezing the middle.
How real captains plan an innings
Real T20 captains usually plan the death first. The best death bowler's overs are protected so that two or three of them are still available for the last five overs, and the rest of the innings is built around that. Powerplay overs go to bowlers who swing the new ball, or increasingly to a spinner who can surprise batters looking to attack. The middle overs are where spinners and cutter bowlers do their work, often chosen to suit the batters at the crease: an off-spinner against left-handers, a leg-spinner or left-arm spinner against right-handers.
In a 50-over game the same thinking stretches over a longer innings. A captain might use two short spells from the opening bowlers, keep the spinners for the middle, and save four or five overs of pace for the end, when the ball is older and the batters are swinging.
The part-timer who runs out of puff
Not every bowling option is a frontline bowler. A batsman who bowls a bit, a part-time all-rounder, is treated as what they really are: a captain will happily sneak an over or two out of them, but leaning on them for a full quota is punished the same way it is in real cricket. That is the same instinct a real captain applies when the fifth-bowler options are thin. One nice wrinkle: a part-timer who genuinely turns it, like a specialist option on a turning pitch, becomes a much more serious threat on the surface that suits them.
The fifth-bowler problem
The hardest part of one-day selection is finding fifty overs. Five frontline bowlers leave room for only six specialist batters, so many sides pick four bowlers and share the last ten overs among batters who bowl. India won the 2011 World Cup with exactly that kind of solution: Yuvraj Singh, picked mainly as a batter, bowled left-arm spin through the tournament, took 15 wickets and was named player of the tournament.
When the part-timer is that good, the side has the best of both. When he is not, the fifth bowler's overs become the ones the opposition targets, and a captain faces the same choice the engine does: bowl them early and hope, or save them and risk them at the death.
Why it feels like captaincy
Because the choice is driven by phase, quota and matchup rather than a fixed script, the bowling unfolds differently every innings and responds to the XI you actually picked. Leave yourself short of a fifth bowling option and the engine is forced onto a part-timer at the death, with predictable results; pack your side with frontline seamers and you can hammer the new ball and defend the last five overs. Selection and rotation are the same decision, one over at a time.
See it happen
Set your bowling plan and watch the rotation play out in the T20 Franchise Manager or The Chase. How each of those overs resolves ball by ball is covered in how a delivery is decided.