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Subject: misunderstanding of position by humans

Author: Uri Blass

Date: 01:27:30 05/20/05


[D]8/p2knpb1/1p4p1/1Ppp2P1/P3PP2/2PKB3/4B3/8 w - - 0 33

The following position is from my last game in the israeli league.

I had 20 minutes on the clock against more than 30 minutes of my opponent and
after not seeing a way to win the game I played
33.Bg4+ and offered a draw.

My opponent declined the draw and replied 33...Kc7

I continued 34.e5 Bf8 35.Bf3 Kd7 36.Bg4+ Kc7 37.Bf3 Kb8 38.Bg2 Kc7 and now I
claimed a draw because my 39 move force 3 time repetition.

[D]5b2/p1k1np2/1p4p1/1PppP1P1/P4P2/2PKBB2/8/8 b - - 0 39

My opponent did not agree and claimed that there was no 3 time repetition.
He also claimed that he has the better position and he plans to win the game.

He was forced to get a draw because of the repetition but when we analyzed the
game he claimed that the knight is better than the bishop and my bishop is
passive when his bishop can go to a3 after c4.

I was surprised by this claim and I am sure that every computer have no problem
of misunderstanding that white is better.

If I knew that my opponent thinks that he has the better position I would
continue without claiming a draw and I believe that in that case I had good
chances to win inspite of my evaluation that the position is objectively a draw.

I thought that the reason that my opponent refused to draw is to try to win on
time and inspite of being sure that I can hold it I did not want to spend time
on lines like 39.Bf3 Kd7 40.Bg4+ Nf5 when again I did not see a way to win.

My opponent thought to play 39...c4+ in case that I play 39.Bf3 without claiming
a draw and like the computer I think that it is bad.

I could not prove a win for white after 39...c4+ but white can win material and
maybe also the game.



Analyzing with shredder gives another idea to try to win the game without Bf3

39.a5 Kd7 40.a6 Bg7?(of course 40...Kc7 is better) when the sacrifice 41.Bxc5 is
probably winning

I still could not find a win for white against correct defence and I am
interested to know if white can win.

I give this position also to demonstrate that humans are not always superior
relative to computers in positional understanding and at least the human that I
played against him did not do tactical mistakes in the game(he has israeli
rating of 1990 that is equivalent to the same fide rating) but he totally
misunderstood the position.

Uri



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