The following position is obviously a dead draw. Engines have problems with this kind of positions.
Following test: Let your favourite engine search for, say, 30 seconds (less on fast hardware), but not longer. Which engine has the score with the smallest difference to a draw (0.00)? Is there an engine that even scores the position as a draw?
[d]r3kb2/8/1p1p1p1p/p1p1p1p1/P1P1P1P1/1P1P1P1P/8/2B1KB2 w q -
Here is the result of some engines on my Core 2 Duo, ordered worst to best:
Stockfish 1.6.3 JA: Depth 24, Score -2.38
Twisted Logic 20100131x: Depth 25/37, Score -1.90
Shredder Classic 3: Depth 16/27, Score -1.90
AnMon 5.60: Depth 17, Score -1.89
Spike 1.2: Depth 18, Score -1.71
SOS 5.1: Depth 19/30, Score -1.66
Hermann 2.4: Depth 17/34, Score -1.62
Rybka 2.2n2: Depth 22(+3), Score -1.24
ProDeo 1.5: Depth 17, Score -1.23
ChessMind 0.72: Depth 11/27, Score -0.84
I hope that there is some intelligent engine that can see the draw.
metax wrote:The following position is obviously a dead draw. Engines have problems with this kind of positions.
Following test: Let your favourite engine search for, say, 30 seconds (less on fast hardware), but not longer. Which engine has the score with the smallest difference to a draw (0.00)? Is there an engine that even scores the position as a draw?
[d]r3kb2/8/1p1p1p1p/p1p1p1p1/P1P1P1P1/1P1P1P1P/8/2B1KB2 w q -
Here is the result of some engines on my Core 2 Duo, ordered worst to best:
Stockfish 1.6.3 JA: Depth 24, Score -2.38
Twisted Logic 20100131x: Depth 25/37, Score -1.90
Shredder Classic 3: Depth 16/27, Score -1.90
AnMon 5.60: Depth 17, Score -1.89
Spike 1.2: Depth 18, Score -1.71
SOS 5.1: Depth 19/30, Score -1.66
Hermann 2.4: Depth 17/34, Score -1.62
Rybka 2.2n2: Depth 22(+3), Score -1.24
ProDeo 1.5: Depth 17, Score -1.23
ChessMind 0.72: Depth 11/27, Score -0.84
I hope that there is some intelligent engine that can see the draw.
Typical blocked position where all or at least most can't see the draw statically or through a quick search. This needs to change and it would help engines avoid such positions.
This would of course hurt Pablo's enjoyment of locking up computer positions to force a draw or win on time.
metax wrote:The following position is obviously a dead draw. Engines have problems with this kind of positions.
Following test: Let your favourite engine search for, say, 30 seconds (less on fast hardware), but not longer. Which engine has the score with the smallest difference to a draw (0.00)? Is there an engine that even scores the position as a draw?
[d]r3kb2/8/1p1p1p1p/p1p1p1p1/P1P1P1P1/1P1P1P1P/8/2B1KB2 w q -
Here is the result of some engines on my Core 2 Duo, ordered worst to best:
Stockfish 1.6.3 JA: Depth 24, Score -2.38
Twisted Logic 20100131x: Depth 25/37, Score -1.90
Shredder Classic 3: Depth 16/27, Score -1.90
AnMon 5.60: Depth 17, Score -1.89
Spike 1.2: Depth 18, Score -1.71
SOS 5.1: Depth 19/30, Score -1.66
Hermann 2.4: Depth 17/34, Score -1.62
Rybka 2.2n2: Depth 22(+3), Score -1.24
ProDeo 1.5: Depth 17, Score -1.23
ChessMind 0.72: Depth 11/27, Score -0.84
I hope that there is some intelligent engine that can see the draw.
Marc MP wrote:I'm sorry I "read" the article in one minute or so....
Do you think it would implementable in a chess engine without too much loss in time checking the conditions (say with extra pieces)?
You're a programmer if I'm not wrong? (if so you got to answer! )
In this position, if you just shuffle the pieces around a little and place the black rook and king to support the h5 push and the white mobile pieces further away, then this position will probably be won for black.
Or in other combinations it may be possible that a piece would be sacrificed to create a dangerous passer.
The more possibilites one side has, the harder it becomes to generalize.
In my opinion the first problems with pieces to be approached should be with opposite colored bishops. eg in this position, if either side only had the bishop on the same square color as its pawns, the position would become trivial (knights, rooks and queens are more complicated). There are many more of these type of positions, where the stronger side can't do anything because of a wrong colored bishop.
