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Subject: Interesting position for engine eval testing

Author: Jim Monaghan

Date: 21:53:32 10/14/03


Here's an interesting position for engine eval testing:

[D]3r1brk/pp3p1p/8/2pP1P2/2Pn4/6nP/PP4B1/R2Q1RK1 w - - 0 26

You will get all kinds of eval scores with this. The game is from an article in
this month's En Passant by IM Sokolov. Black has tremendous compensation on the
black squares for his huge material defecit (2Ns vs Q+P, roughly -4).

Superb idea by Gligoric. IM Sokolov suggests White is in serious trouble and
that Black doesn't necessarily have to grab material back, but can simply
maitain pressure and slowly build threats. Horrible position for White to be in
as a human or machine. In the game, White blundered too much material away with
28.Raf1? and soon succumbed.

It would be interesting to see what different engines see and conclude about the
above position. Will the score consistently drop over time? Could White have
held?

[Event "Teeside it"]
[Site "Teesside ENG"]
[Date "1972.04.??"]
[Round "8"]
[White "Bilek, Istvan"]
[Black "Gligoric, Svetozar"]
[Result "0-1"]
[WhiteElo "2500"]
[BlackElo "2600"]
[ECO "A16"]
[EventDate "1972.04.17"]

1.c4 Nf6 2.Nc3 g6 3.g3 Bg7 4.Bg2 O-O 5.d3 c6 6.e4 d6 7.Nge2 Nbd7 8.O-O e5 9.h3
Nh5 10.Kh2 Nc5 11.Be3 Ne6 12.d4 c5 13.dxc5 dxc5 14.Nd5 Nd4 15.f4 Be6 16.f5 Bxd5
17.exd5 Nf6 18.g4 gxf5 19.gxf5 Kh8 20.Nc3 e4 21.Kh1 Rg8 22.Bg5 Bf8 23.Nxe4 Nxe4
24.Bxd8 Ng3+ 25.Kg1 Rxd8 26.Rf3 Bd6 27.Qd3 Rde8 28.Raf1 Nxf1 29.Rxf1 Ne2+ 30.
Kh1 Ng3+ 31.Kg1 Nxf1 32.Kxf1 Rg3 33.Qd1 Reg8 34.Qh5 Rxg2 35.Qxf7 Be5 36.f6 Bd4
0-1

Cheers,
Jim



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