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Ain't she sweet - OTB and post mortem

Posted By: svilo
Date: Sunday, 8 March 2015, at 6:33 p.m.

In Response To: Ain't she sweet (svilo)

I played "as per plan" 18/13 6/4 with 1 blot and the double "in my pocket". In the match analysis I was dinged it was a blunder. In a XG roller++ it told me the other option I looked at OTB 18/16 13/8 won considerably more gammons and practically the same wins as the BEST 16/11 13/11. Amazing! Ja se sblaznim! - I know it from czech is it the same in Polish? The best move (P11) won 2.3% less gammons and only 0.3% more games. WHY? Then I remembered, even if I am too good, still I am playing with a "knife in my pocket" - precube play!

Below are my thoughts at first glance - before a closer look and your comments. In my first glance I counted 6 shots from the bar against my blot on his barpoint, but the 22 is blocked - hence 5 shots, still quite a bit more than the 2 "killing returns" on my 8 had I played P16, 8.





White is Player 2

score: 1
pip: 160
9 point match
pip: 128
score: 0

Blue is Player 1
XGID=a--BBBC--c--cD--AbAd-b----:0:0:1:52:0:1:0:9:3
Blue to play 52

1.Rollout116/11 13/11eq: +1.066
Player:
Opponent:
74.92% (G:38.88% B:0.66%)
25.08% (G:4.65% B:0.17%)
Conf.: ± 0.009 (+1.057...+1.075) - [98.8%]
Duration: 6 minutes 08 seconds
2.Rollout118/16 13/8eq: +1.051 (-0.015)
Player:
Opponent:
74.58% (G:41.24% B:0.58%)
25.42% (G:4.88% B:0.20%)
Conf.: ± 0.009 (+1.042...+1.060) - [1.2%]
Duration: 7 minutes 03 seconds
3.XG Roller++18/13 6/4eq: +0.979 (-0.087)
Player:
Opponent:
72.21% (G:33.74% B:0.43%)
27.79% (G:5.05% B:0.19%)
4.3-ply18/11eq: +0.994 (-0.072)
Player:
Opponent:
74.30% (G:35.02% B:0.50%)
25.70% (G:4.38% B:0.13%)
5.3-ply13/6eq: +0.986 (-0.080)
Player:
Opponent:
71.57% (G:38.25% B:0.63%)
28.43% (G:5.30% B:0.17%)
1 1296 Games rolled with Variance Reduction.
Moves: 3-ply, cube decisions: XG Roller

A beautiful precube play. The 18/16 13/8 play is more compact. Wins only .3% less games, but wins 2.3% more gammons! And yet the "bolder" looking play 16/11 13/11 is the favorite! The latter gives 6 shots against only 2 (the famous 62 from the bar), but the 62 is meaningful. If he hits us after 13/11 16/11 we have a lot of return shots and he is behind the prime yet. Never mind we win 2.3% less gammons. It is important to double him in/out on our next turn. 62 is a joker for him and the 6 shots are not that kind of a joker. I guess most of them are still double-ins.

eXtreme Gammon Version: 2.19.208.pre-release, MET: Kazaross XG2

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