|
Main
Date: 21 Jan 2007 19:16:28
From: Dave Smith
Subject: Is there a forced winning line for black?
|
6k1/p4p1p/5p2/8/8/P6P/3r2P1/1R5K b - - 0 35
|
|
|
Date: 23 Jan 2007 02:58:14
From: Wlodzimierz Holsztynski (Wlod)
Subject: Re: Is there a forced winning line for black?
|
[email protected] has provided interesting links: > http://en.wikipedia.org/wiki/Forsyth-Edwards_Notation > > Any decent chess program should be able to accept this format. > > As for a website, you can try here: > > http://www.shredderchess.com/online-chess/online-databases/endgame-database.html > At first this website mad me happy. Then I tried position: FEN: 8/2kpp3/8/8/8/8/2PK2P1/8 w and the program claims that white is lost in at the most 21 moves, and in 9 moves after playing kd2-c3. However, after executing this kd2-c3 move, the program in the new position claims that it is a draw. (It claims a draw also after some other moves by white). This contradiction proves that the program has a bug. Best regards, Wlod
|
| |
Date: 23 Jan 2007 12:15:30
From: Tony M
Subject: Re: Is there a forced winning line for black?
|
On 23 Jan 2007 02:58:14 -0800, "Wlodzimierz Holsztynski (Wlod)" <[email protected] > wrote: >[email protected] has provided interesting links: > >> http://en.wikipedia.org/wiki/Forsyth-Edwards_Notation >> >> Any decent chess program should be able to accept this format. >> >> As for a website, you can try here: >> >> http://www.shredderchess.com/online-chess/online-databases/endgame-database.html >> > >At first this website mad me happy. >Then I tried position: > >FEN: 8/2kpp3/8/8/8/8/2PK2P1/8 w > >and the program claims that >white is lost in at the most 21 moves, >and in 9 moves after playing kd2-c3. >However, after executing this kd2-c3 >move, the program in the new position >claims that it is a draw. (It claims a draw >also after some other moves by white). > >This contradiction proves that >the program has a bug. > >Best regards, > > Wlod I copied and pasted your position to the Shredder web site, and it claimed that all moves resulting from this position were drawn. When I removed the g pawn, then the site claimed that the position was a loss in 21 for white. However, I produced bugs, similar to what you experienced, by clicking on and changing the position very quickly. It seems to me that the Java applet caches the results of tablebase searches, and if one clicks too quickly the wrong search results somehow get associated with the wrong position. Refreshing the page clears up these problems. Tony
|
|
Date: 22 Jan 2007 23:21:34
From: help bot
Subject: Re: Is there a forced winning line for black?
|
Sanny wrote: > Dave Smith wrote: > > 6k1/p4p1p/5p2/8/8/P6P/3r2P1/1R5K b - - 0 35 > > How to look this position on the computer. Is there any site where I > can input above board position and it shows me the real chess position. Good question, Sanny. This is Forsythe notation (I may have spelled that incorrectly), and it goes something along these lines: six (empty squares on the bottom rank), White King on f1(?) a White pawn on a2, then four empty squares, White pawn again, and so forth. To me, it is a bit confusing, but the idea is that it requires somewhat fewer characters to represent a chess position than the old style notation. I suppose at one time this saving of characters was important, but now I don't really see the advantage, except of course to those few who use this extensively. -- help bot
|
|
Date: 22 Jan 2007 22:37:31
From: Sanny
Subject: I got the Solution
|
Dave Smith wrote: > 6k1/p4p1p/5p2/8/8/P6P/3r2P1/1R5K b - - 0 35 After looking the Fen diagram at http://www.shredderchess.com/online-chess/online-databases/endgame-database.html I understood what the position is. It is black move So Black moves R-a2 In reply white has two options 1. R-b8+ Then black moves K-g7. 2. R-f1 Then again White plays K-g7. It keeps pressure on a3 and advances other three pawns. And can win by advancing extra pawn to Queen. I am not great player as I easlily get beaten by Beginner Level at: http://www.GetClub.com/Chess.html But This is what I conclude from quick analysis. Being a pawn up is a good Advantage. Bye Sanny Play Chess at: http://www.GetClub.com/Chess.html
|
|
Date: 22 Jan 2007 21:08:21
From: SBD
Subject: Re: Is there a forced winning line for black?
|
On Jan 22, 7:43 pm, "Dave Smith" <[email protected] > wrote: > "SBD" <[email protected]> wrote in messagenews:[email protected]... > > > > > Beat your opponent until dead and wait for his flag to fall.Is this an idiot's version of "humour"? Perhaps. It's along the lines of "this position is winnable only if your opponent has a heart attack and dies at the board." In other words, you have asked a very stupid question. And if you are the 2181 CFC you claim to be, you had better rush out for an EEG, as your question shows you just lost a thousand rating points worth of brainpower.
|
|
Date: 22 Jan 2007 12:37:16
From:
Subject: Re: Is there a forced winning line for black?
|
Sanny wrote: > Dave Smith wrote: > > 6k1/p4p1p/5p2/8/8/P6P/3r2P1/1R5K b - - 0 35 > > How to look this position on the computer. Is there any site where I > can input above board position and it shows me the real chess position. > > Thanks > Sanny > > Play Chess at: http://www.GetClub.com/Chess.html This is a standard format for notating a chess position in text called "Forsyth-Edwards Notation" or "FEN". http://en.wikipedia.org/wiki/Forsyth-Edwards_Notation Any decent chess program should be able to accept this format. As for a website, you can try here: http://www.shredderchess.com/online-chess/online-databases/endgame-database.html This site will take any position with up to 6 men on the board and show you the result after best play. jm
|
|
Date: 21 Jan 2007 22:46:48
From: Sanny
Subject: Re: Is there a forced winning line for black?
|
Dave Smith wrote: > 6k1/p4p1p/5p2/8/8/P6P/3r2P1/1R5K b - - 0 35 How to look this position on the computer. Is there any site where I can input above board position and it shows me the real chess position. Thanks Sanny Play Chess at: http://www.GetClub.com/Chess.html
|
| |
Date: 23 Jan 2007 12:13:29
From: Tony M
Subject: Re: Is there a forced winning line for black?
|
On 21 Jan 2007 22:46:48 -0800, "Sanny" <[email protected] > wrote: > >Dave Smith wrote: >> 6k1/p4p1p/5p2/8/8/P6P/3r2P1/1R5K b - - 0 35 > >How to look this position on the computer. Is there any site where I >can input above board position and it shows me the real chess position. > >Thanks >Sanny > >Play Chess at: http://www.GetClub.com/Chess.html I copied and pasted your position to the Shredder web site, and it claimed that all moves resulting from this position were drawn. When I removed the g pawn, then the site claimed that the position was a loss in 21 for white. However, I produced bugs, similar to what you experienced, by clicking on and changing the position very quickly. It seems to me that the Java applet caches the results of tablebase searches, and if one clicks too quickly the wrong search results somehow get associated with the wrong position. Refreshing the page clears up these problems. Tony
|
| |
Date: 22 Jan 2007 21:07:04
From: Dave (from the UK)
Subject: Re: Is there a forced winning line for black?
|
Sanny wrote: > Dave Smith wrote: > >>6k1/p4p1p/5p2/8/8/P6P/3r2P1/1R5K b - - 0 35 > > > How to look this position on the computer. Is there any site where I > can input above board position and it shows me the real chess position. > > Thanks > Sanny > > Play Chess at: http://www.GetClub.com/Chess.html > http://chessdb.sourceforge.net/ will do it on your own computer. Black has a king, 4 pawns and a rook - white a king, 3 pawns and a rook. -- Dave (from the UK) Please note my email address changes periodically to avoid spam. It is always of the form: [email protected] Hitting reply will work for a few months only - later set it manually. http://chessdb.sourceforge.net/ - a Free open-source Chess Database
|
|
Date: 21 Jan 2007 22:03:29
From: SBD
Subject: Re: Is there a forced winning line for black?
|
Beat your opponent until dead and wait for his flag to fall.
|
| |
Date: 23 Jan 2007 01:43:21
From: Dave Smith
Subject: Re: Is there a forced winning line for black?
|
"SBD" <[email protected] > wrote in message news:[email protected]... > > > Beat your opponent until dead and wait for his flag to fall. > Is this an idiot's version of "humour"?
|
|