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Subject: Tiger Endgame Shock

Author: Sune Larsson

Date: 21:23:18 12/23/01



 [D]8/k1p5/P7/8/2K4p/1p4rP/6P1/1R6 w - - 0 47


 This is a possible position from the first game Gambit Tiger - IM Berg.
 While playing out different endings vs Tiger, I stumbled upon this little
 intermezzo. Previous moves were: 45.-Nxc4 46.Kxc4 h4  /diagram.

 Tiger here ponders on and plays 47.Rxb3, with an eval of -0.78 - just to
 find itself in the misery of -11.36, a single move later...

 I played out this ending on a PIII 800, 192 Mb hash, 1 hour per player.

 Would have made a great testposition, but after the better 47.Kb5 black
 just have to find 47.-Rg8! 48.Kc6 Rb8! which also wins.

 For a human it's easy to see that a move like 47.Rxb3 loses quickly for
 white, but Tiger - (and maybe other programs) - has clear problems here.


[Event "KIL 60'"]
[Site "KIL"]
[Date "2001.12.23"]
[Round "?"]
[White "Gambit Tiger 2.0"]
[Black "Larsson"]
[Result "0-1"]
[SetUp "1"]
[FEN "8/k1p5/P7/8/2K4p/1p4rP/6P1/1R6 w - - 0 47"]
[PlyCount "4"]
[EventDate "2001.12.23"]

47. Rxb3 {-0.78/17 369} 47... Rxb3 {9} 48. Kxb3 {-11.36/26 117} 48... Kxa6 {13}
0-1


 Sune




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