Author: Paulo Soares
Date: 17:17:45 09/04/00
Go up one level in this thread
On September 04, 2000 at 16:46:57, Enrique Irazoqui wrote: >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 In the line in that you analyzed the mate in 13 (31. f3 Bd6 32. f5 Ba3 33. Rg3 Bc1 etc), I think that instead 33. Rg3, 33. Rg4 take to a mate in 12. I agree with you, it would be nice to have a competent and fast mate solver, these positions are difficult, and it's common that our analyses are not correct. Paulo Soares, from Brazil [Event ""] [Site "?"] [Date "1879.??.??"] [Round "?"] [White "Chigorin, Mikhail"] [Black "Yakubovich"] [Result "1-0"] [SetUp "1"] [FEN "5qrk/p1p1b1rp/4P2Q/1p6/5P2/8/P4P1P/B5RK w - b6 0 31"] [PlyCount "23"] [EventDate "1879.??.??"] 31. f3 $1 Bd6 32. f5 Ba3 33. Rg4 Bc1 34. Qg6 h6 (34... Qe7 35. f6 Rd8 36. fxe7 Rd1+ 37. Kg2 Rd2+ 38. Kh3 Rxh2+ 39. Kxh2 Bf4+ 40. Rxf4 hxg6 41. e8=Q+ Kh7 42. Rh4#) 35. Rh4 Qxf5 36. Qxf5 Rd8 37. Qg6 Rd1+ 38. Kg2 Rd2+ 39. Kh3 Rxh2+ 40. Kxh2 Bf4+ 41. Rxf4 c5 42. Qxg7# 1-0
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.