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Chow's Checkerplay Challenge

Posted By: Timothy Chow
Date: Friday, 28 January 2011, at 3:44 p.m.

I've been going back and studying all the old Othello quizzes and have been inspired to create a checkerplay quiz of my own. See below.

Composing this quiz took more work than expected, so I'm not sure if I'll do another one in the future. To some extent it will depend on whether people react favorably to this one. If you would like to see me do another one in the future, then please post a response to this message.

One remark about scoring: To help mitigate QF, I have devised a system of partial credit. You get 2 points for the top play (according to my XG 3-ply rollout); but you can also score 1 point or even 2 points for another play if I judge it to be sufficiently close to the top play. This way you can't eliminate a play from consideration simply because there's another play that is clearly very close to it in equity.


Position 1





White is Player 1

score: 0
pip: 161
Money session
Jacoby
pip: 127
score: 0

Blue is Player 2
XGID=--BBbBB-ACa-d---Ac-cbA-A--:0:0:1:51:0:0:1:0:10
Blue to play 51


Position 2





White is Player 2

score: 0
pip: 124
Money session
Jacoby
pip: 115
score: 0

Blue is Player 1
XGID=a-BBAACB-B--b---abbcb-bB--:1:1:1:52:0:0:1:0:10
Blue to play 52


Position 3





White is Player 2

score: 0
pip: 114
1 point match
pip: 159
score: 0

Blue is Player 1
XGID=----aBBBBB--cB-A--bcbb-bB-:0:0:1:43:0:0:0:1:10
Blue to play 43


Position 4





White is Player 2

score: 0
pip: 136
Money session
Jacoby
pip: 112
score: 0

Blue is Player 1
XGID=-BaBBBCA----cA--bc-d-b-A-A:1:-1:1:13:0:0:1:0:10
Blue to play 13


Position 5





White is Player 2

score: 0
pip: 135
1 point match
pip: 177
score: 0

Blue is Player 1
XGID=-----aE-C--aeC----Bbbbb-B-:1:1:1:61:0:0:0:1:10
Blue to play 61


Position 6





White is Player 2

score: 0
pip: 141
Money session
Jacoby
pip: 104
score: 0

Blue is Player 1
XGID=-cBBCBC-A---a-----bcbbbB--:0:0:1:64:0:0:1:0:10
Blue to play 64


Position 7





White is Player 2

score: 1
pip: 148
2 point match
Crawford
pip: 152
score: 0

Blue is Player 1
XGID=-a-a--E-CB--dC---bAcb-bA--:0:0:1:65:0:1:1:2:10
Blue to play 65


Position 8





White is Player 2

score: 0
pip: 121
Money session
Jacoby
pip: 91
score: 0

Blue is Player 1
XGID=---DBDBb----bC---b-dabb---:1:-1:1:53:0:0:1:0:10
Blue to play 53


Position 9





White is Player 2

score: 0
pip: 116
2 point match
Crawford
pip: 116
score: 1

Blue is Player 1
XGID=--ACbCB-B-a--BA---bccbAb--:0:0:1:21:1:0:1:2:10
Blue to play 21


Position 10





White is Player 2

score: 0
pip: 160
Money session
Jacoby
pip: 126
score: 0

Blue is Player 1
XGID=-b-a-BCCD--Bba---b-cbb-A--:0:0:1:51:0:0:1:0:10
Blue to play 51

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