Author: F. Huber
Date: 10:27:08 02/16/04
Go up one level in this thread
On February 16, 2004 at 13:08:00, Heiner Marxen wrote: >On February 16, 2004 at 12:25:54, F. Huber wrote: > >>Hi, >> >>I´ve just found out, that the last position in the included file ´Mate.epd´ >>seems to have an error - there should be a white pawn at e4! >> >>So please delete this line and replace it with the following correct line: >> >>8/kPp5/2P3p1/p1P1p1P1/2PpPp2/3p1p2/3P1P2/5K2 w - - bm #50; 00:00 @ C-/K2/P2/X6; >> >>At the same time this corrected position is the new Chest record - >>a mate in 50 in 0 sec! >> >>Try it with the following settings: >>ProblemType=Special-Mate >>ChecksOnly=off >>KingMobility=2 >>PieceLimit=2 >>MaxMoves=6 >> >>ChestUCI Ver.3.3 UCI: >> >>CPU: Celeron 400MHz >>FEN: 8/kPp5/2P3p1/p1P1p1P1/2PpPp2/3p1p2/3P1P2/5K2 w - - >>Search for Special-Mate [C-/K2/P2/X6] in 50 ... (Hash=48MB) >>50 00:01 M50 1.Ke1 >>Search completed ... (Time=0.93s) >>Special-Mate in 50 found ! (00:00) >>1.Ke1 Kb8 2.Kd1 Ka7 3.Kc1 Kb8 4.Kb1 Ka7 5.Kb2 Kb8 6.Kb3 Ka7 7.Ka4 Kb8 >>8.Kxa5 Ka7 9.Ka4 Kb8 10.Ka3 Ka7 11.Kb2 Kb8 12.Kc1 Ka7 13.Kd1 Kb8 14.Ke1 Ka7 >>15.Kf1 Kb8 16.Kg1 Ka7 17.Kh2 Kb8 18.Kh3 Ka7 19.Kg4 Kb8 20.Kxf3 Ka7 21.Kg2 Kb8 >>22.Kf1 Ka7 23.Ke1 Kb8 24.Kd1 Ka7 25.Kc1 Kb8 26.Kb2 Ka7 27.Kb3 Kb8 28.Kb4 Ka7 >>29.Kb5 Kb8 30.Ka6 f3 31.Ka5 Ka7 32.Kb5 Kb8 33.Kb4 Ka7 34.Kb3 Kb8 35.Kb2 Ka7 >>36.Kc1 Kb8 37.Kd1 Ka7 38.Ke1 Kb8 39.Kf1 Ka7 40.Kg1 Kb8 41.Kh2 Ka7 42.Kg3 Kb8 >>43.Kxf3 Ka7 44.Kg4 Kb8 45.f4 Ka7 46.fxe5 Kb8 47.e6 Ka7 48.e7 Ka6 49.b8Q Ka5 >>50.Qb5# >>1 Solution (Special-Mate in 50) >> >>Regards, >>Franz. > >Wow! I'm impressed! > >The normal brute force search (currently) is completely hopeless here: >it reaches depths around 25 but nothing remotely near the needed 50. >Although it already uses a special heuristic, invented for exactly _this_ >very problem. > >Thanks for making Chest look much more powerful! :-) > >Cheers, >Heiner ´Thanks´ back to you Heiner, without you there wouldn´t be ´anything´, that I could make "look much more powerful". ;-) But why only "look much more ..." - it IS absolutely powerful! (There´s really only _one_ more feature I could imagine, that would make Chest still more powerful - you know what I mean .... ;-)) All the best, Franz.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.