Author: Jason Williamson
Date: 08:30:05 09/26/00
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On September 26, 2000 at 11:25:03, Steffen Jakob wrote: >Hi all! > >I ran the GMG3 endgame test suite with Hossa. Here is the position #13: > >[D]5q2/6pk/p7/1p3PPK/1P2Q3/8/8/8 w > >The key move is 1.g6. > >After a while Hossa gave 1.f6 with a score of +10.47. I thought that maybe f6 is >a possible solution too. So I examined the PV of Hossa. It started with > >1.f6 h7g8 2.e4e6 f8f7 3.e6xf7 g8xf7 4.f6xg7 f7xg7 5.g6 > >which leads to this position: > >[D]8/6k1/p5P1/1p5K/1P6/8/8/8 b > >Here Hossa continued with 5... Kf6 which is indeed losing. All moves seem to be >losing here. But when I forced 5... b5 6. bxa5 Hossa gave a score of mate in 54! > >How is this such a position handled in tournament chess? Is this a draw (I think >the rules have changed here several times?!)? If it's a draw then I will change >my tablebase probe code to return a draw score if the mate distance is > 50. > >Best wishes, >Steffen. Don't forget that that mate in 54, the pawn will move several times, each time restarting the draw in 50 move rule count.
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