2020 - Position 187

XGID=-a-aBBC-BB-AbB---abbbbb-A-:1:1:1:33:2:1:0:9:10

Match Play. Red leads 2-1 to 9. How should Red play 33?

This is a prime versus prime position and so Red should make his full prime with 13/7(2).

The tactical 13/10, 9/3*, 6/3 is an error and 9/3(2) is very nearly a blunder.

Hopefully Red can use the cube to win the game. If White already owned the cube then 13/10, 9/3*, 6/3 would be marginally the better play.