Solutions to your endgames Einstein forum

11 replies. Last post: 2012-08-21

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Solutions to your endgames
  • zwack at 2012-08-13

    I’ve been trying to decide what to do with Sybil’s endgame databases. But until I’ve got that figured out, I thought I’d open them up to anyone interested. If you’ve got a position from a game here on LG that you’d like to see the solution to, post the URL to the position (like, say, ) up in this forum and I’ll ask Sybil to reply with the winning chances (given perfect play) resulting from each possible move.

    Sybil can handle any position with 7 pieces or fewer. Please no games still in progress...

  • Ingo Althofer at 2012-08-14

    Did I make a wrong move here?


  • lorentz at 2012-08-14

    I can answer the question. It is “yes” but probably not where you think. :)

  • Ingo Althofer at 2012-08-14

    Did someone manipulate the address I had entered?

    Here is the position I mean:


  • YHW at 2012-08-14

    This is a chance of 2/3 for capturing the 3 as well as 2/9 (11,1%) for both other moves, no wrong move here, I think, how close am I to the perfect chances?

  • YHW at 2012-08-14

    Sorry, I meant 2/9 (22,2%)....

  • sybil_c at 2012-08-14

    Spot on, YHW. Blue wins 2/3 of the time he takes the 3 and 2/9 of the time he doesn’t.

  • YHW at 2012-08-16

    That was not too difficult, just a maximum of 2 moves to win that game, but let’s try a 7-stone-situation, what about this one:

    Where to go with what stone?
    In retrospective, I think, it would have been better to move the red one in diagonal direction...?!

  • sybil_c at 2012-08-16

    Red chances of winning after each of the following moves:

    1/c2-d2 — 27.6%
    1/c2xc3 — 44.6%
    1/c2-b3 — 45.4%
    5/b3xc3 — 45.5%
    5/b3-b4 — 30.1%
    5/b3xc4 — 36.5%

    Pretty close, either way.

  • YHW at 2012-08-17

    So I chose the worst of the three meaningful opportunities ;) Thanks !

  • Hjallti at 2012-08-21

    #1465918 Mirko Rahn vs. YHW
    Move: 159

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