Author: Howard Exner
Date: 07:24:11 03/02/00
Go up one level in this thread
On March 02, 2000 at 09:56:02, Robert Hyatt wrote: >On March 01, 2000 at 22:47:18, Howard Exner wrote: > >>On March 01, 2000 at 22:33:16, Robert Hyatt wrote: >> >>>On March 01, 2000 at 02:58:49, Dann Corbit wrote: >>> >>>>On March 01, 2000 at 01:37:17, Janos Keinrath wrote: >>>> >>>>>Hi! >>>>> >>>>>Yesterday I saw an intresting endgame position on ICC. >>>>> >>>>>[D]8/8/6k1/3p4/3P4/2P2PKp/pB4b1/8 b - - >>>>> >>>>>This is the final position of a blitz game played by Amateur >>>>>with black. The game ended with rep. draw, but I feel black somehow >>>>>can win. Could you check the position? What is the winning plan? >>>> >>>>Crafty likes Kf5 from the get-go, but the evaluation does not climb over one >>>>pawn until ply 19. I'd be surprised if programs see a win at normal game-type >>>>time controls (other than 'postal' games). >>> >>> >>>Don't forget "good hardware". I get a fail high at depth=18, 35 seconds, on the >>>quad 550 (big hash, etc). score is +1.76: >>> >>> 18 35.99 ++ 1. ... Kf5!! >>> 18 1:06 1.76 1. ... Kf5 2. c4 dxc4 3. d5 Bf1 4. >>> Bh8 Be2 5. d6 Ke6 6. f4 Bg4 7. Be5 >>> c3 8. Bxc3 Kxd6 9. Kh2 Bf5 10. Ba1 >> >>In the above white can play 5. Kxh3 instead of d6. If 5. ... Bxf3 6. Kg3 Bxd5 >>7. Kf2 = Unless black has something better? > >This seems worse for white: > > > 14-> 23.77 2.63 5. ... Bxf3 6. Kg3 Bxd5 7. Kf2 Ke4 > 8. Ke2 Bc6 9. Bc3 Bd7 10. Bh8 Be6 11. > Bc3 Bg4+ 12. Kd2 Bf3 > >(this is after 5. Kxh3) May be a worse eval from a computer, but take a close look at the position. White only needs to move the king over to a1. If black manoevers its pieces to permit c3 then Bxc3,Kxc3 and the opposiste colored bishop ending/stalemate results. Even your above line is indicating that black is making no progress( ie:the many bishop moves with no real progress). A six piece tablebase would fix this in a hurry. > > > >>> >>>19 plies took 15 more seconds, up to +1.86. 20 was done in just over 2 minutes, >>>score creeping up slowly iteration by iteration. >>> >>>This might be found in a blitz game, the search would be faster if it had an >>>old hash table already primed with data. And thinking on the opponent's time >>>would likely help too.
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