Ajedrecista wrote:Hello to everybody:
Yesterday I played a LTC game (30' + 30"/move) at LiChess, although both my opponent and me spent little time to reach this position IIRC:
[d]8/3kb1pp/4pp2/1p1p4/1P1P1PP1/3NK2P/8/8 b - - 0 1
I was black (so, I was a pawn up) and had something like 37 minutes on the clock; my opponent had around 32 minutes. He/she offered a draw and I accepted... my endgame skills are limited, my playing style is dull and I am not ambitious at chess.
But today, giving short tries to some top engines, their evals were between -0.56 (Houdini 1.5a at depth 24/47, suggesting ..., Bd8) and -1.49 (SF 2.2.2 at depth 31/49, suggesting ..., g6). The end of the suggested mainlines by Critter 1.4, Deep Rybka 4.1, Houdini 1.5a, Komodo 3, Quazar 0.4 and SF 2.2.2 are not clear to me (only seeing the new positions, without analysing with engines), from my patzer POV.
Then, I tried the extreme cases (less eval and greater eval):
This position is reached by the last mainline that SF 2.2.2 calculated:
[d]8/8/2k2p1p/1pPpP2P/1P6/8/2K5/8 b - - 0 1
And then, SF evaluates it as -1.73 at depth 33/53 (obviously suggesting ..., PxP). But the passed pawns of both sides prevent both kings of make progressions.
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This position is reached by the last mainline that Houdini 1.5a calculated:
[d]8/6p1/1bk2p1p/1p1ppP2/1P1P2P1/1NK4P/8/8 b - - 0 1
And then, Houdini evaluates it as -0.68 at depth 28/52 (suggesting ..., e4). The position is still unclear to me, there is like no real progress can be made.
So, the initial position should be a draw or a win by black? Please post about this endgame.
I am not an expert on computer chess, but I think that engines sometimes have problems in some endgames... maybe also here? I hope this position will be enjoyable for players and useful for programmers.
Regards from Spain.
Ajedrecista.
Please, Do not confuse with engine evaluation which is plus/minus numerical output.
Numerical value of -1.00 or equal can confirm win / loss respectively in opening or initial middle game.( effective because of more materials)
But in endgame where pawns are equal or +- 1 with different colored Bishops or Bishop vs Knight or Night vs Knight , engines showing +- in terms of material value ( in numerical) up to 3.00 is understood as draw.
( Must have blocked/semi blocked position )
It depends on the entry of King into the enemy's territory ,blocked/semi-blocked pawn structure and so on, as list of conditions are long.
So as for given position which is
1.Semi-blocked in term of pawn structure and entry for Bishop.
Donot count Kinght.
2.No entry for king into enemy territory.( Blocked)
although both Kings are placed in good squares.
Now i think , you will understand whether given position is winning or losing.
Neel Basant
