Author: Enrique Irazoqui
Date: 03:49:14 09/05/00
Go up one level in this thread
On September 05, 2000 at 02:08:48, Ed Schröder wrote: >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. > >Instead of 5..c4 try 5..Qa8. Is there a mate then? > >1. f3 c5 2. f5 Bd6 3. Rg4 Bf4 4. Qxf4 Qd8 5. Rg1 Qa8 Same mate in 12: 36. Rxg7 Rxg7 37. Qg3 Qf8 38. e7 Kg8 39. exf8=Q+ Kxf8 40. Qxg7+ Ke8 41. Bf6 b4 42. Qe7# Ed, why don't you make a mate finder that can solve this kind of positions? It doesn't exist. Enrique >Ed > > > >>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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