Author: Enrique Irazoqui
Date: 13:46:57 09/04/00
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On September 04, 2000 at 15:23:39, Eelco de Groot wrote: > >Both Q5T and Y1 experimental personalities for Rebel Century 2.0 ECTool are >showing a ! now in their search, not simply a +. I haven't seen this ! before.. >They must be on to something but a mate in 12 is probably too deep too find, I think it's mate in 13. I post the longest lines I found. Good luck with Century 2 or with anything you try. I had to force moves a few times. It would be nice to have a competent mate solver that would find the best line in this position. Enrique [Event "corr"] [Site "?"] [Date "1879.??.??"] [Round "?"] [White "Chigorin, Mikhail"] [Black "Yakubovich"] [Result "1-0"] [Annotator "ChessBase"] [SetUp "1"] [FEN "5qrk/p1p1b1rp/4P2Q/1p6/5P2/8/P4P1P/B5RK w - b6 0 31"] [PlyCount "11"] [EventDate "1879.??.??"] 31. f3 $1 c5 (31... a6 32. f5 Bc5 33. Rg3 Be3 34. Qxe3 Qxf5 35. Rg1 h5 36. Qh6+ Qh7 37. Rg6 b4 38. Bxg7+ Rxg7 39. e7 Rxg6 40. e8=Q+ Rg8 41. Qf6+ Qg7 42. Qxh5#) (31... Bd6 32. f5 c5 (32... Bc5 33. Rg3 Be3 34. Qxe3 Qxf5 35. Rg1 h5 36. Qh6+ Qh7 37. Rg6 c5 38. Bxg7+ Rxg7 39. e7 Rxg6 40. e8=Q+ Rg8 41. Qf6+ Qg7 42. Qxh5#) (32... Ba3 33. Rg3 Bc1 34. Qg6 h6 35. Rh3 Qxf5 36. Qxf5 Rd8 37. Rg3 Bg5 38. Rxg5 hxg5 39. e7 Rd1+ 40. Kg2 Rd2+ 41. Kg3 Rg2+ 42. Kxg2 b4 43. e8=Q#) 33. Rg4 Bf4 34. Qxf4 Qd8 35. Rg1 c4 36. Bd4 Qb6 37. Rxg7 Rxg7 38. Bxg7+ Kg8 39. Bh6 Qd8 40. Qg3+ Qg5 41. Qxg5+ Kh8 42. Qg7#) 32. f5 b4 33. Rg3 c4 34. Qxh7+ $1 Kxh7 35. Rh3+ Bh4 36. Rxh4# 1-0 >Q5T >now at 17 ply deep. The engines have to share the one processor so this may take >quite a while because of the consecutive fail highs. This looks like a position >for a dedicated mate-solver! > >There used to be a Dutch program years ago in the days of 6502 and Z80 8-bits >processors that was a fast solver. It would probably not work on a PIII or PIV >without a major re-write, I think it was written in assembly language. There was >a micro-computer television course from TELEAC here in The Netherlands and you >could buy this computer especially for the course to learn more about >micro-computers. Nobody had heard about PCs or their clones yet. But this mate >solver was written for an Ohio Scientific computer I believe, by P.(Piet?) >Wiereyns. Details are hidden in the stack with "Computerschaak" issues from the >early eighties, no idea what became of the program. Maybe we should ask Jan >Louwman, if he knows more. But I wonder what such a program would make of this >Chigorin-Yakubovich position on todays fast computers.. > > Eelco
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