White - Pips 68

Black to Play - 3-1

Black - Pips 76




Black to Play - 3-1


Duplication is a key consideration of checker play. Of course you must hit, otherwise White stands an excellent chance to win the race, and when you hit, you are now a big favorite. The question is what to do with the 1. If you continue to your 9 point, White can hit you back with a 5-4 or 4-5. That is two out of 36 rolls. But if you leave the checker on the 10 point and move the other checker from 13/12, the only number that hits you back is 5-5. That is only 1 out of 36, or half as much. You have "duplicated" the 5 that White needs to come in from the bar and the 5 that he needs to hit by leaving that checker 5 away from the open point.