Thanks for posting yet another useful quiz, Phil. I especially like these quizzes that dwell on variations of similar positions -- it really helps isolate the themes.
I'm still working through the problems, adding the most useful ones to my database and often rolling out some of the problems. I thought it worth mentioning that especially in these back-game scenarios, it's always worth grabbing ++ evals on the "also-ran" plays that XG discards at lower eval levels. (and ++ doesn't take much extra time). For example, on problem #7, if you give 6/5(4) a ++ hearing, it pops right up to the top of the list, .016 better than 6/4(2) -- which to me is surprising, because I thought leaving your 4-point "light" would be a bad idea! A rollout makes all three top plays even closer.
Sorry I can't seem to get the export to bear the checkers off the other way to match your quiz! Also, my confidence in getting XG exactly right is still a little shaky, so if I've misrepresented the position, it would be useful for me to see how!
      
 
         
 | | White is Player 2
score: 0
pip: 158 | Unlimited Game
Jacoby Beaver | pip: 68
score: 0
Blue is Player 1 |
|
| XGID=-cbDCDD------------bbbbb--:1:-1:1:11:0:0:3:0:10 |
| Blue to play 11 |
| 1. | Rollout1 | 6/5(4) | eq: +0.652 |
| Player:
Opponent: | 66.56% (G:38.77% B:8.50%)
33.44% (G:0.00% B:0.00%) | Conf.: ± 0.012 (+0.639...+0.664) - [81.7%]
Duration: 2 minutes 22 seconds |
|
| 2. | Rollout1 | 6/4(2) | eq: +0.643 (-0.008) |
| Player:
Opponent: | 66.25% (G:39.00% B:8.11%)
33.75% (G:0.00% B:0.00%) | Conf.: ± 0.011 (+0.633...+0.654) - [15.1%]
Duration: 2 minutes 12 seconds |
|
| 3. | Rollout1 | 6/3 5/4 | eq: +0.638 (-0.013) |
| Player:
Opponent: | 66.26% (G:38.85% B:7.68%)
33.74% (G:0.01% B:0.00%) | Conf.: ± 0.010 (+0.628...+0.649) - [3.1%]
Duration: 1 minute 57 seconds |
|
| 4. | XG Roller++ | 6/5 6/3 | eq: +0.638 (-0.013) |
| Player:
Opponent: | 65.85% (G:38.09% B:7.40%)
34.15% (G:0.05% B:0.00%) | |
|
| 5. | XG Roller++ | 5/4(4) | eq: +0.588 (-0.063) |
| Player:
Opponent: | 64.36% (G:36.28% B:6.62%)
35.64% (G:0.02% B:0.00%) | |
|
| |
1 1296 Games rolled with Variance Reduction.
Moves: 3-ply, cube decisions: XG Roller
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eXtreme Gammon Version: 2.10