XGID=bABbBCCBA--------cbbcaA---:1:-1:1:11:4:3:0:9:10
Match Play. Red leads 4-3 to 9. How should Red play 11?
The first ace must be played 22/21* because Red must escape his last rear checker.
The priority then is to prevent White from making a second anchor. A play such as 22/21*, 7/6, 5/4 is a reasonable try but the best move, by a narrow margin, is 22/21*, 7/6, 2/1(2). Red kills a checker but he has fourteen checkers in the zone and so he can afford to kill one in order to minimise the chances of White ever making a second anchor. All the other plays are close but 22/21*, 7/6, 2/1(2) wins by a short head.