Questions tagged [tablebases]
Tablebases are databases that contain complete, exhaustively calculated moves and variations for a given collection of chess positions. E.g. the Nalimov tablebases contain full solutions for all endgames involving 6 pieces or less.
99 questions
4 votes
1 answer
780 views
Is filtering a 7 man tablebase feasible?
I had a discussion on reddit https://www.reddit.com/r/chessprogramming/comments/1ojsn6k/has_a_tablebase_like_this_been_done/ where I was told that due to tablebases being constructed using retrograde ...
- 43
10 votes
2 answers
3k views
Can chess engines solve the bishop and knight mate without the use of an endings tablebase?
Can top chess engines systematically mate a lone king with bishop and knight against perfect defense without the use of a tablebase? Using "Deletang's Method" as shown in Wikipedia for ...
- 109
0 votes
2 answers
109 views
Nalimov Tablesbases folders/directory location
Where (folder/directory location) should the Nalimov Tablesbases be installed to maximize their access and operation?
7 votes
2 answers
380 views
Bug in Syzygy tablebases?
The main page of Syzygy tablebases has links to some peculiar positions. One of them is 556 half-moves before the winning side can safely move a pawn. But when you open it, the status in the top right ...
- 173
0 votes
1 answer
287 views
Stockfish with Syzygy Support in Scid vs PC
My question is simple, yet rather sophisticated. It seems to me, that some people were able to set up Scid vs Pc (or Scid) in a way, that stockfish - or any derivative - is able to use offline syzygy-...
- 33
3 votes
0 answers
77 views
Distance-to-safe-win metric
Assume you have an endgame position which can be won in exactly three ways: DTM 51...only OTB it isn't won because of the 50 move rule DTZ 30, the resulting position won in 40 moves DTZ 40, the ...
- 19k
3 votes
0 answers
51 views
How do I get a text response from 4kit Nalimov endgame tablebase
I am trying to get a simple text response from 4kit Nalimov endgame tablebase, using an URL and asking for the answer to a FEN string.
5 votes
1 answer
438 views
Table bases: an endgame challenge
From where can I download this "data/syzygy/regular" file so that the code below becomes functional ? import chess import chess.syzygy with chess.syzygy.open_tablebase("data/syzygy/...
- 385
3 votes
2 answers
267 views
Do endgame tablebases only handle legal positions?
The title is my question for now. I also wonder if similar legality concerns may reduce the number of input FENs as checkmates used as input to the retrograde proofing or construction process. In ...
- 181
4 votes
3 answers
357 views
Why hasn't any new endgame theory been developed from the endgame tablebases?
With all 7-man endgame tablebases completed years ago, and the 8-man endgame tablebases in the works now, why have we not seen new strategies outlined for, say, how to win with rook and two knights ...
- 463
-2 votes
1 answer
171 views
The state of chess when it becomes solved (or nearly solved) [closed]
Let's take a hypothetical middlegame position, where there is one move that leads to checkmate for white and every other move is a draw. Let's say that grandmasters examining the position, but not ...
- 463
3 votes
0 answers
168 views
Can previous and continuing research on N-piece tablebases be used toward human theory of chess?
This follows another questions here: What is the status for EIGHT piece endgame tablebases? My answer there was appropriately removed as being question in reaction to that question, well in light of ...
- 181
0 votes
0 answers
135 views
A six piece position
L Black to move, it is a White win in 95 moves according to Shredder tablebases. Syzygy tablebases confirm the win. What do DTR (distance to rule) tablebases, that take account of the 50 move rule at ...
3 votes
1 answer
138 views
Problem with tablebases
I hope this is the right forum for my question. So, I have all 5 men files on my HDD and the two files KRPPvKR.rtbz KRPPvKR.rtbw In the position here (8/2K2k2/3R3P/5P2/8/8/8/r7 w - - 0 10) everything ...
- 63
26 votes
2 answers
9k views
What is the status for EIGHT piece endgame tablebases?
An earlier question here asked in 2012 about the status of 7-piece tablebases. Today complete 7-piece tables are widely available. So today, what is the status of 8-piece endgame tablebases? How ...
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