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RO and article by Tardieu

Posted By: Klaus Evers
Date: Thursday, 30 June 2011, at 7:50 p.m.

In Response To: More bearoff mistakes (Klaus Evers)

Well, I can imagine that the top-experts make the best play in a sec. Intermediates will have to think twice.

My point in this bearoff is, that of course gammons count. But how much? And, that, of course, minimizng shots will win for sure more single wins. But, whenever I take the last reasoning for granted, I am quite puzzled a few times when taking an extra checker off will win more games for you.

Match:

White is Player 2 score: 4 pip: 158 7 point match pip: 28 score: 0 Blue is Player 1 XGID=aBDBC-b-----c----d-c--b---:1:-1:1:33:0:4:0:7:10 Blue to play 33

1. Rollout1 4/1(3) 3/0ff eq: +1,596 Player: Opponent: 84,77% (G:78,51% B:0,23%) 15,23% (G:0,00% B:0,00%) Conf: ± 0,006 (+1,590...+1,602) Duration: 6 minutes 29 seconds 2. Rollout1 4/1(2) 3/0ff(2) eq: +1,558 (-0,038) Player: Opponent: 84,38% (G:75,53% B:0,30%) 15,62% (G:0,00% B:0,00%) Conf: ± 0,007 (+1,551...+1,565) Duration: 7 minutes 23 seconds 1 1296 Games rolled with Variance Reduction. Moves and cube decisions: 3 ply eXtreme Gammon Version: 1.21, MET: GnuBG 11 point

Usually, your checkerplay errors in bearoff cost you not much equity. But these situation occur so often, that it is worth studying these routine plays very well. At the end of the day they will add up quite a lot. (And I can tell you: my checker mistakes add up quite a LOT ;-) )

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Match Variant

White is Player 2 score: 4 pip: 142 7 point match pip: 28 score: 0 Blue is Player 1 XGID=aBDBC-b-----a----bbcbb----:1:-1:1:33:0:4:0:7:10 Blue to play 33

1. Rollout1 4/1(3) 3/0ff eq: +1,382 Player: Opponent: 78,79% (G:70,97% B:0,11%) 21,21% (G:0,00% B:0,00%) Conf: ± 0,005 (+1,377...+1,387) Duration: 2 minutes 43 seconds 2. Rollout1 4/1(2) 3/0ff(2) eq: +1,304 (-0,078) Player: Opponent: 77,64% (G:65,95% B:0,19%) 22,36% (G:0,00% B:0,00%) Conf: ± 0,006 (+1,298...+1,310) Duration: 2 minutes 54 seconds 1 1296 Games rolled with Variance Reduction. Moves and cube decisions: 3 ply eXtreme Gammon Version: 1.21, MET: GnuBG 11 point

You can still win the game after getting hit, but from the RO it is clear that your gammons won go way down (in both positions)!

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DMP original

White is Player 2 score: 0 pip: 158 1 point match pip: 28 score: 0 Blue is Player 1 XGID=aBDBC-b-----c----d-c--b---:0:0:1:33:0:0:0:1:10 Blue to play 33

1. Rollout1 4/1(3) 3/0ff eq: +0,694 Player: Opponent: 84,72% (G:79,50% B:0,29%) 15,28% (G:0,00% B:0,00%) Conf: ± 0,004 (+0,690...+0,698) Duration: 6 minutes 53 seconds 2. Rollout1 4/1(2) 3/0ff(2) eq: +0,680 (-0,015) Player: Opponent: 83,99% (G:76,87% B:0,57%) 16,01% (G:0,00% B:0,00%) Conf: ± 0,004 (+0,676...+0,684) Duration: 8 minutes 07 seconds 1 1296 Games rolled with Variance Reduction. Moves and cube decisions: 3 ply eXtreme Gammon Version: 1.21, MET: GnuBG 11 point

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DMP Variant

White is Player 2 score: 0 pip: 142 1 point match pip: 28 score: 0 Blue is Player 1 XGID=aBDBC-b-----a----bbcbb----:0:0:1:33:0:0:0:1:10 Blue to play 33

1. Rollout1 4/1(3) 3/0ff eq: +0,574 Player: Opponent: 78,72% (G:71,55% B:0,09%) 21,28% (G:0,00% B:0,00%) Conf: ± 0,003 (+0,571...+0,577) Duration: 3 minutes 05 seconds 2. Rollout1 4/1(2) 3/0ff(2) eq: +0,547 (-0,027) Player: Opponent: 77,35% (G:66,45% B:0,15%) 22,65% (G:0,00% B:0,00%) Conf: ± 0,004 (+0,543...+0,551) Duration: 3 minutes 12 seconds 1 1296 Games rolled with Variance Reduction. Moves and cube decisions: 3 ply eXtreme Gammon Version: 1.21, MET: GnuBG 11 point

Finally, an article from Tardieu: Bearoff Tips at DMP

Messages In This Thread

• More bearoff mistakes
  Klaus Evers -- Wednesday, 29 June 2011, at 10:48 p.m.
  • More bearoff mistakes
    Mick Dyett -- Thursday, 30 June 2011, at 5:41 a.m.
  • More bearoff mistakes
    ah_clem -- Thursday, 30 June 2011, at 2:26 p.m.
  • More bearoff mistakes
    Timothy Chow -- Thursday, 30 June 2011, at 6:18 p.m.
  • RO and article by Tardieu
    Klaus Evers -- Thursday, 30 June 2011, at 7:50 p.m.
    • RO and article by Tardieu
      Timothy Chow -- Thursday, 30 June 2011, at 11:09 p.m.
    • RO and article by Tardieu
      Bob Koca -- Thursday, 30 June 2011, at 11:42 p.m.
      • RO and article by Tardieu
        Klaus Evers -- Friday, 1 July 2011, at 5:43 a.m.
    • RO and article by Tardieu
      Mochy -- Friday, 1 July 2011, at 12:15 a.m.
    • RO and article by Tardieu
      Daniel Murphy -- Friday, 1 July 2011, at 5:18 a.m.