From: epeterso@encore.com (Eric Peterson)
Subject: Re: F-S II game 29 -- comment/analysis
Organization: Encore Computer Corporation
Date: Thu, 5 Nov 1992 19:59:53 GMT
X-Newsreader: TIN [version 1.1 PL6]

mark reeve (reeve@mail.physics.utah.edu) wrote:

| I find it difficult to understand why Fischer did not play
| 19. Bd5 instead of 19. e*d6 which landed him in hot water a 
| few moves later. After 19. Bd5 I can't see anything better 
| than 19. ... B*d5 20. Q*d5 Ng5 21. N*g5 Q*g5 22. Q*d6 winning
| a clear pawn.

I ran this game through GNU Chess gnuan (depth = 7 moves, max time = 5
min.), and it came up with the same line you did as being the best.
Here's the result of the analysis, starting with that move ...

Move White Black      Score Depth     Best Line
------------------------------------------------------------------
 19   e5d6*             74    7    b3d5  b7d5  d1d5  e4g5  f3g5  e7g5  d5d6  a8d8  b1d2  f8e8
            e7f6        34    7    e7f6  d1c2  e4d6  b1d2  b7c6  a1c1  f8e8
 20   b1d2*            -20    7    d1c2  e4d6  b1d2  b7c6  a1c1  f8d8  c2b1
            e4d6        30    7    e4d6  a1b1  a8e8  e1e8  f8e8  d2c4  d6c4  b3c4
 21   d2c4*            -31    7    a1b1  d7b6  f3e5  f8e8  e5g4  f6f5
            d6c4       103    7    d6c4  b3c4  a8d8  d1e2  b7f3  g2f3  f6f5  g1h2
 22   b3c4             -91    7    b3c4  a8d8
            d7b6*       98    7    a8d8  d1b3  b7f3  b3f3  f6b2  f3e4  b2c3  a1c1  d7f6
 23   f3e5             -45    7    f3e5  b6c4  e5c4  f8d8  d1c1  b7d5  c4e5
            a8e8        53    7    a8e8  c4f7  f8f7  e5f7  e8e1  d1e1
 24   c4f7             -47    7    c4f7  f8f7  e5f7  e8e1  d1e1  f6f7  e1e3  b6d7
            f8f7        51    7    f8f7  e5f7  e8e1  d1e1  f6f7  f2f3  f7g6  e1e3
 25   e5f7             -52    7    e5f7  e8e1  d1e1  f6f7  f2f3  f7c4  e1f2  b6d5
            e8e1        49    7    e8e1  d1e1  f6f7  f2f3  f7g6  g1h1  b6d5  a1c1
 26   d1e1             -43    7    d1e1  f6f7  e1e5  f7d5  e5d5  b7d5  a2a4  b6c4
            g8f7        45    7    g8f7  e1d2  b7c6  a1c1  b6d7  c1c4  f6g6
 27   e1e3*            -40    7    e1d2  b7c6  a1c1  b6d7  c1e1  d7e5  d2c2
            f6g5*       61    7    b6d5  e3b3  f6f4  b3a4  f7g8  a4d7  f4f7  d7f7  g8f7
 28   e3g5              29    7    e3g5  h6g5  a2a3  b4b3  a1e1  b6c4  e1e2  b7d5
            h6g5       -21    7    h6g5  a2a3
 29   b2b3*             33    7    a2a3  b4b3  a1d1  b7d5  f2f3  c5c4  g1f2
            f7e6*       22    7    b7d5  a1d1  f7f6  d1d2  f6e5  g1f1  b6d7
 30   a2a3*              1    7    f2f3  b6d5  a1e1  e6f5  g1f2  d5c3  a2a4
            e6d6*       25    7    b4a3  a1a3  b6d7  f2f3  b7d5  g1f2  e6e5  a3a7
 31   a3b4              20    7    a3b4  c5b4  a1a7  d6c6  g1f1  b6d7  f1e2  c6b6
            c5b4       -12    7    c5b4  a1a7
 32   a1a5              19    7    a1a5  b6d5  g1h2  d6c6  a5a4  g7g6
            b6d5       -12    7    b6d5  g1h2  d6c6  h2g3  c6b6  a5a4  b6c5
 33   f2f3*             15    7    g1h2  b7c6  f2f3  c6d7  a5a7  d5e3  h2g3
            b7c8         2    7    b7c8  g2g4  c8d7  g1g2  d7e6  g2g3  d6e5
 34   g1f2              -8    7    g1f2  c8e6  a5b5  d6e5  b5c5  e6d7
            c8f5*       17    7    c8e6  a5b5  d6e5  b5c5  e5f4  c5c4  f4f5  c4c5
 35   a5a7              -7    7    a5a7  g7g6  a7a2  f5e6  a2a5  d5f4
            g7g6*       23    7    d6e5  a7g7  e5f6  g7g8  f5c2  g8f8  f6g7  f8d8  c2b3
 36   a7a6              -3    7    a7a6  d6e5  a6a2  f5d3  f2g3  d3f5  g3f2  f5d3
            d6c5*       23    7    d6e5  a6c6  f5b1  f2g3  b1a2  g3g4  a2b3  g4g5
 37   f2e1*            -15    7    a6a2  f5e6  a2e2  d5f4  e2e5  c5d4  e5e4  d4c3  e4e3  f4d3  f2e2
            d5f4       101    7    d5f4  e1f2  c5d4  a6b6  d4c3  b6b5  c3b3
 38   g2g3*            -57    7    e1f2  c5d4  a6a5  d4c3  g2g4  f5d3  f2g3  c3b3  a5g5
            f4h3        91    7    f4h3  e1d2  h3f2  a6a5  c5b6  a5e5  g5g4
 39   e1d2             -69    7    e1d2  h3f2  a6a5  c5b6  a5e5  g5g4  d2e3
            c5b5        93    7    c5b5  a6d6  h3f2  d6d5  b5c6  d5a5  g5g4
 40   a6d6             -74    7    a6d6  h3f2  d6d5  b5c6  d5a5  g5g4  d2e3
            b5c5*       78    7    h3f2  d6d5  b5c6  d5d4  c6c5  d4c4  c5b5  d2e3
 41   d6a6             -39    7    d6a6  c5b5
            h3f2        91    7    h3f2  a6a5  c5b6  a5d5  g5g4  d2e3  f2h1  d5d1
 42   g3g4             -29    7    g3g4  f5d3  a6f6  d3b1  d2c1  b1d3  c1d2  c5d5
            f5d3*       29    7    f5d7  a6g6  f2h3  d2e3  d7c6  g6h6  h3f4
 43   a6e6*             -4    7    a6f6  d3b1  d2c1  b1d3  c1d2  d3b1

           White's percentage was 34.88%.     Black's percentage was 35.71%.

Just FYI ...

Eric
Newsgroups: rec.games.chess