Positions engines get wrong ( please contribute )


  • 2 months ago · Quote · #61

    AndrejPro

    This position comes from the end of an interesting puzzle. Insert this setup into your favorite engine. The position is a dead draw, but engines will give black something around -14. White only needs to move the bishop along the a7-g1 diagonal and there is nothing black can do to win. 
  • 2 months ago · Quote · #63

    wickiwacky

    AndrejPro - I disagree - that position is a win for black. The Queeen goes to a1 - e5 - e1 and then f2 where white is forced to accept the sac and thus loses. 

  • 2 months ago · Quote · #64

    chessfan999



  • 2 months ago · Quote · #66

    Morphysrevenges

    IM Marc Esserman's book Mayhem in the Morra is filled with positions where the engines give erroneous evaluations. 

  • 2 months ago · Quote · #67

    wickiwacky

    pfren wrote:
    wickiwacky wrote:

    AndrejPro - I disagree - that position is a win for black. The Queeen goes to a1 - e5 - e1 and then f2 where white is forced to accept the sac and thus loses. 

    When this happens, white takes the queen, and after ...gxf2 he plays the only legal move, g2-g3+. Stalemate, regardless if Black captures, or plays ...Kh3.

    Crikey yes! Missed the stalemate at the end - the f2 pawn just ready to Queen and cant do it. 

  • 2 months ago · Quote · #68

    lofina_eidel_ismail

    AndrejPro wrote:
     

    truly interesting piece!

    thx for sharing this

  • 2 months ago · Quote · #69

    Trevor-D

    pfren wrote:

    Here is a correspondence game I played (this means both players could use an engine). Black played 35...Rc6, which is the recommendation of all engines. An engine can calculate that white loses the pawn back if he exchanges rooks. What an engine cannot calculate within a reasonable timeframe is that the resulting king and pawn endgame (with equal pawns) is completely lost for Black (horizon effect), while an average human player will realize this after less than two minutes' thought.

     



    So is there a move for Black which doesn't lose?

  • 2 months ago · Quote · #70

    watershoot

    [COMMENT DELETED]
  • 2 months ago · Quote · #71

    watershoot

    pfren wrote:

    Here is a correspondence game I played (this means both players could use an engine). Black played 35...Rc6, which is the recommendation of all engines. An engine can calculate that white loses the pawn back if he exchanges rooks. What an engine cannot calculate within a reasonable timeframe is that the resulting king and pawn endgame (with equal pawns) is completely lost for Black (horizon effect), while an average human player will realize this after less than two minutes' thought.



    My engine said that Rb6 is best and Rc6 is a blunder...

  • 2 months ago · Quote · #72

    endomorphic

    In this famous position, Stockfish recommends a3, while if d4 is played, black's much, much better, even according to Stockfish. I don't understand why it can't see that.

  • 2 months ago · Quote · #75

    endomorphic

    @mkkuhner: That's a very nice one by Short. Indeed -- on move 34 Stockfish evaluates the position as equal and recommends the push of pawn to c3, after which the evaluation doesn't change. Instead, in the game Kf4 is played and Stockfish evaluates the position as +8.4. A similar scenario to the Topalov vs Shirov game.

  • 2 months ago · Quote · #76

    lifeonvenus

    I once tried using to engines .Making one vs the other one but later blundered like this
    1.d4 1. ...e5

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