From: jhc@ivan.uucp (James H. Coombs)
Subject: Spassky-Fischer #6, Zarkov analysis
Reply-To: jhc@iris.brown.edu.uucp (James H. Coombs)
Organization: IRIS - Brown University
Date: Sat, 12 Sep 1992 06:58:37 GMT

For what it's worth, I am posting Zarkov's analysis of Spassky-Fischer
#6---a QGA that ended in a draw.  Please let me know if this is at all
useful to people.  I have interspersed a couple of comments/questions.  --Jim

Move               Score Ply Suggested Line
  1. d4               27   0   BOOK
  1.       d5          9   0   BOOK
  2. c4               16   0   BOOK
  2.       dxc4       14   0   BOOK
  3. Nf3              -6   0   BOOK
  3.       Nf6         8   0   BOOK
  4. e3                8   0   BOOK
  4.       e6         -2   0   BOOK
  5. Bxc4             10   0   BOOK
  5.       c5          9   0   BOOK
  6. O-O             -11   0   BOOK
  6.       a6         -2   0   BOOK
  7. dxc5             -9   0   BOOK

Ok, this is a book line, but it leads to easy equalization for Black.
Why would Spassky want to exchange Queens?  As I get it from Fine,
White would want to keep Queens on the board.

  7.       Qxd1       14   9   d8d1  f1d1  f8c5  b2b3  b7b5  c4e2  b8d7  c1b2 
                               c8b7 
  8. Rxd1             27   9   f1d1  f8c5  a2a3  b7b5  b2b4  c5b6  c4e2  e8g8 
                               c1b2 
  8.       Bxc5       20   8   f8c5  c1d2  b7b5  c4e2  c8b7  a2a4  b7f3  e2f3 
  9. b3               32   8   c1d2  b7b5  c4e2  c8b7  d2c3  b8d7  b2b4  c5e7 
  9.       Nbd7        7   8   b7b5  c4e2  c8b7  c1b2  b8d7  a2a4  b7f3  e2f3 
 10. Bb2              10   8   a2a4  b7b6  c1b2  c8b7  b1d2  e8g8  a1c1  c5d6 
 10.       b5         17   8   b7b5  c4d3  c8b7  b1d2  e8g8  a1c1  c5d6  e3e4 
 11. Be2              30   8   c4e2  c8b7  f3e5  d7e5  b2e5  h8g8  e5c7  a8c8 
 11.       Bb7        22   8   c8b7  a2a4  b5a4  b3a4  e8g8  h2h3  b7d5  b1d2 
 12. Nbd2             26   8   a2a4  b5a4  a1a4  e8g8  h2h3  h7h6  b3b4  c5e7 
 12.       Ke7         9   7   e8g8  a2a4  b5b4  a1c1  a8c8  e2d3  c5d6 
 13. a4               55   7   a2a4  b7c6  e2d3  b5a4  b3a4  h8b8  b2c3 
 13.       bxa4       44   7   b5b4  a1c1  h8c8  d2c4  e7f8  d1d2  b7d5 
 14. Rxa4             48   7   a1a4  d7b6  b2f6  g7f6  a4a2  c5b4  e2d3  h8g8 
 14.       Rhb8       62   7   d7b6  b2f6  g7f6  a4h4  a8d8  d1a1  b7f3  d2f3 
 15. Rc1              66   7   h2h3  b8d8  e3e4  d7b6  a4a5  c5b4  b2f6  e7f6 
 15.       Bd5        64   6   c5d6  d2c4  b7c6  a4a2  d6b4  c4e5 
 16. Ne5              78   7   b2f6  g7f6  e3e4  d5b7  c1a1  d7b6  a4a5  c5b4 
 16.       Bd6        47   7   c5b4  e5d7  f6d7  c1c2  b4d2  c2d2  d5b3  a4a6 
                               a8a6  e2a6 

This seems to me an interesting suggestion.  I played through it and
found no problems.  In this variation (16...Bb4 17.Nxd7 Nxd7 18.Rc2 Bxd2
19.Rxd2 Bxb3 20.Rxa6 Rxa6 21.Bxa6), Black completes the exchange of
pawns.  I see no point to 16...Bd6 (not that I see a point to most
GM moves).  Perhaps Fischer is trying to hold onto attacking material.

 17. Nxd7            104   7   e5d7  f6d7  b2g7  b8g8  a4g4  f7f5  g4g5 
 17.       Nxd7       98   8   f6d7  a4a6  a8a6  e2a6  d6b4  b2c3  e6e5  a6c4 
                               b4c3  c1c3 
 18. Rxa6            104   7   a4a6  a8a6  e2a6  d6b4  b2c3  e6e5  a6c4  b4c3 
                               c1c3 
 18.       Rxa6       49   8   a8a6  e2a6  d7c5  a6c4  d5c4  d2c4  c5b3  c1d1 
 19. Bxa6             85   8   e2a6  d7c5  a6c4  d5c4  d2c4  c5b3  c1d1  b3a5 
 19.       f6         58   8   d7c5  a6c4  d5c4  d2c4  c5b3  c1c2  f7f6  c4d6 
                               e7d6 
 20. Bc4             100   8   a6c4  d7c5  c1b1  d5c4  b3c4  c5d3  b2c3  b8b1 
                               d2b1 
 20.       Bxc4      103   8   d5c4  c1c4  d7e5  c4c3  d6b4  c3c7  e7d6  c7c2 
                               d6e7  b2e5  f6e5 
 21. Rxc4             54   8   c1c4  d7c5  b2a3  c5b3  c4c7  e7d8  a3d6  b3d2 
                               h2h4  b8b1  g1h2 
 21.       Nc5        55   7   d7c5  b2a3  c5b3  c4c7  e7d8  a3d6  b3d2  h2h4 
                               b8b1  g1h2 
 22. Rc3              49   8   b2a3  c5b3  c4c7  e7d8  a3d6  b3d2  f2f3  b8b6 
                               d6f4  b6b1  g1f2 
 22.       f5         61   8   c5a4  c3c2  a4b2  c2b2  d6b4  d2c4  b8d8  f2f4 
                               d8d1  g1f2 
 23. Ba3             122   8   b2a3  c5d7  a3d6  e7d6  e3e4  b8a8  f2f4  a8a2 
                               c3d3  d6c6 
 23.       Ne4       119   8   c5d7  a3d6  e7d6  d2c4  d6e7  h2h3  d7b6  c4e5 
                               b6d5  c3d3 
 24. Rc7+            190   8   c3c7  e7d8  a3d6  e4d2  c7g7  b8b3  g2g3  b3b1 
                               g1g2  h7h6 

Someone suggested Bxd6+ here to keep the passed pawn.  I'm not sure how
that would work.  I see 24.Bxd6+ Kxd6, and then White is hard pressed
to advance that pawn---and his rook is tied up with the defensive task
until he can bring his King around.

Note that Zarkov has Spassky ahead by the value of almost two pwans.

 24.       Kd8       176   9   e7d8  a3d6  e4d2  c7g7  b8b3  g2g3  h7h6  g1g2 
                               b3b2 
 25. Bxd6            185   8   a3d6  e4d2  c7g7  b8b3  g2g3  h7h6  g1g2  b3b2 
 25.       Nxd2      180   8   e4d2  c7g7  b8b3  g2g3  h7h6  g7a7  b3b1  g1g2 
                               d2e4  d6e7  d8c8 
 26. Rxg7            196   8   c7g7  b8b3  g2g3  h7h6  g7e7  e6e5  g1g2  d2e4 
 26.       Rxb3      199   8   b8b3  g2g3  h7h5  g1g2  d2c4  d6c7  d8c8  g7e7 
                               b3b7 
 27. h4              200   7   g2g3  h7h5  d6c7  d8e8  g1g2  b3d3  c7e5  d3d7 
 27.       h5        174   8   d2e4  d6c7  d8c8  f2f3  b3b1  g1h2  b1b7  c7e5 
                               b7g7  e5g7 
 28. Bf4             209   7   d6e5  b3d3  g1h2  d3d7  g7g8  d8e7  h2h3  d2c4 
                               g8g7  e7e8 
 28.       Ke8       207   7   b3c3  f2f3  d2c4  g7c7  c3c2  e3e4  f5e4  f3e4 
 29. Kh2             203   7   f4g5  e8f8  g7e7  b3b6  e7h7  b6b1  g1h2  d2e4 
 29.       Rb2       188   8   b3d3  g7c7  d3d7  h2h3  d7c7  f4c7  d2e4  f2f3 
 30. Kh3             213   7   h2h3  d2e4  f2f3  e4f2  h3h2  f2d3  f4d6  e6e5 
                               g7e7  e8d8 
 30.       Ne4       215   8   b2b1  f2f3  b1h1  h3g3  d2f1  g3f2  f1d2  f4g5 
                               e8f8  g7d7 
 31. f3              230   8   f2f3  e4c3  f4g5  c3d5  e3e4  f5e4  f3e4  e8f8 
 31.       Nf2+      209   8   e4c3  f4g5  c3d5  e3e4  f5e4  f3e4  e8f8  g7h7 
 32. Kg3             217   9   h3g3  f2d3  f4g5  e6e5  f3f4  e5f4  e3f4  b2e2 
                               g3f3  e2f2  f3g3 
 32.       Nd3       208   8   f2d3  f4g5  e6e5  f3f4  e5f4  e3f4  b2e2  g3f3 
                               e2f2  f3g3 
 33. Bg5             207   8   f4g5  e6e5  f3f4  e5e4  g7e7  e8f8  e7c7  b2e2 
                               g5h6  f8e8 
 33.       e5        199   8   e6e5  g3h3  d3f2  h3h2  f2d3  f3f4  e5e4  g5f6 
                               b2c2  g7e7  e8f8 
 34. Kh3             210   7   g3h3  e5e4  g7e7  e8f8  e7c7  e4f3  g2f3  d3e5 
 34.       Nf2+      203   8   d3f2  h3h2  f2d3  f3f4  e5e4  g7e7  e8f8  e7c7 
                               d3e1  g5h6  f8e8 
 35. Kh2             209   9   h3h2  f2d3  f3f4  e5e4  g7e7  e8f8  e7c7  d3e1 
                               g5h6  f8e8 
 35.       Nd3       206   8   f2d3  g7e7  e8f8  h2h3  b2e2  e7h7  f5f4  e3f4 
                               d3f4  g5f4  e5f4  h7h5 
 36. Bh6             213   7   g7e7  e8f8  h2h3  e5e4  e7c7  e4f3  g2f3  d3e5 
 36.       Ne1       193   7   f5f4  e3f4  d3f4  g7g5  e8f7  g5e5  f4g2 
 37. Kg1             168   8   h2h3  b2e2  g7g6  e5e4  f3e4  f5e4  g6g7  e1d3 
 37.       Nd3       161   7   b2b6  h6g5  e8f8  g7e7  b6b2  e7e5  b2g2  g1f1 
 38. Bg5             163   7   g7a7  d3e1  h6g5  b2c2  a7a5  e8f8  a5a8  f8f7 

 Someone suggested Rg5 here.  I tried it out, and it seems to come to
 nothing: 38.Rg5 Kf7, and taking either pawn would cost a piece.

 38.       Rb1+       -3   9   b2b1  g1h2  b1b2 
 39. Kh2             174   1   g1h2 
 39.       Rb2       207   8   b1b2  g7e7  e8f8  h2h3  e5e4  e7c7  e4f3  g2f3 
                               d3e5 
 40. Re7+            213   7   g7e7  e8f8  h2h3  e5e4  e7c7  e4f3  g2f3  d3e5 
 40.       Kf8       189   8   e8f8  h2h3  d3f2  h3g3  f2d3  f3f4  d3e1  e7e5 
                               b2g2  g3h3 
 41. Re6             203   8   h2h3  d3f2  h3g3  f2d3  f3f4  e5f4  e3f4  d3c5 
                               g3h2  c5e4 
 41.       Kg7       181   8   f8g7  f3f4  e5e4  g5f6  g7f7  e6d6  b2e2  f6d4 
 42. Kh3             188   7   f3f4  d3e1  f4e5  e1g2  h2g3  b2a2  e6c6 
 42.       Re2       186   7   b2c2  e6f6  f5f4  f6d6  d3f2  h3h2  f4e3  g5e3 
 43. Rd6             197   7   e6d6  e5e4  h3g3  d3e1  g5f6  g7f7  f3e4  e2g2 
                               g3f4  g2f2  f4g3 
 43.       Ne1       174   7   e5e4  h3g3  e2a2  d6d7  g7g6  f3f4  d3c5  d7d6 
                               g6f7 
 44. Bf6+            228   7   g5f6  g7g8  f6e5  e2g2  d6f6  g2e2  f6f5  e2e3 
 44.       Kg8       215   9   g7g8  f6e5  e2g2  d6f6  g2e2  f6f5  e2e3  f5g5 
                               g8f7 
 45. Bxe5            209   8   f6e5  e2g2  f3f4  g2e2  e5d4  e1f3  d6d8  g8h7 
                               d8d7  h7g6  d7d6  g6f7 
 45.       Rxe3      205   8   e2g2  d6f6  g2f2  f6f5  f2f3  f5f3  e1f3  e5c3 
                               g8f7 
 46. Bf4             277   8   d6d5  e3d3  d5c5  d3d2  e5g3  e1g2  c5f5  g8g7 
                               f5h5 
 46.       Re2       202   8   e3e2  d6f6  e2g2  f4g3  g2e2  f6f5  g8g7  g3d6 
 47. Rg6+            203   8   d6d2  e2d2  f4d2  e1d3  g2g3  g8f8  f3f4  f8f7 
 47.       Kf7       199   9   g8f7  g6g5  f7f6  f4c7  e2c2  c7d6  c2e2  d6b4 
                               f6e5 
 48. Rg5             195   8   g6g5  f7f6  f4b8  f6e6  f3f4  e2a2  g5g6  e6d5 
                               b8e5 
 48.       Ke6       194   8   f7e6  f4b8  e2c2  f3f4  c2c3  g2g3  c3b3  b8e5 
                               e1d3  g5g6  e6d5 
 49. Bc7             196   8   f4c7  e2b2  g5g6  e6f7  g6g3  f7e6  f3f4  b2c2 
                               c7a5 
 49.       Ra2       179   8   e2c2  c7b8  c2b2  b8h2  b2c2  f3f4  c2e2  g5g6 
                               e6d5 
 50. Bb6             177   8   c7b8  a2b2  b8h2  b2e2  g5g6  e6f7  g6g3  f7f6 
                               g3g5 
 50.       Nd3       167   8   e1d3  h3h2  d3f4  b6e3  f4d5  e3g1  d5f4  g1d4 
 51. Kh2             174   8   b6e3  a2e2  e3a7  d3f4  h3h2  e2b2  a7d4  b2d2 
                               d4c3 
 51.       Ne1       168   8   d3f4  b6e3  f4d5  e3c5  d5f4  g5g7  e6d5  c5e3 
 52. Kh3             181   8   h2h1  a2a1  b6g1  a1a2  g1d4  e1c2  d4c3  c2e3 
 52.       Nd3       172   8   e1d3  b6d4  a2d2  d4g7  d2e2  h3h2  d3e5  g7e5 
                               e6e5  g5h5 
 53. Bc7             178   7   b6d4  a2d2  d4g7  d2e2  h3h2  d3e5  g7e5  e6e5 
                               g5h5 
 53.       Rc2       169   8   a2c2  g5g7  f5f4  c7b6  c2c1  h3h2  d3e5  b6d4 
 54. Bb6             170   8   g5g7  e6f6  g7d7  d3e1  c7d8  f6g6  d7d6  g6g7 
                               d6d5  c2g2  d5f5 
 54.       Ra2        -3   8   c2a2 
 55. Kg3           -19652   1  
 55.       Ne1       168   8   d3e1  g5h5  a2g2  g3f4  e1d3  f4e3  d3b4  h5h6 
                               e6e5  b6c7  e5d5  h6d6  d5e5 
 56. Rxh5            173   8   g5h5  a2g2  g3f4  e1d3  f4e3  d3e5  h5h6  e6d5 
                               e3f4  g2b2  h4h5 
 56.       Rxg2+     181   8   a2g2  g3f4  e1d3  f4e3  d3e5  h5h6  e6d5  e3f4 
                               g2c2  h4h5  c2h2 
 57. Kf4             173   8   g3f4  g2a2  h5h6  e6d5  h4h5  a2a4  f4f5  e1f3 
                               h6f6  f3d4  f5g6 
 57.       Nd3+      165   8   e1d3  f4e3  d3e5  h5h6  e6d5  e3f4  g2c2  h4h5 
                               c2c3  b6e3 
 58. Ke3             115   1   f4e3 
 58.       Ne5       165   8   d3e5  h5h6  e6d5  e3f4  g2c2  h4h5  c2c4  f4f5 
                               e5f3  h6f6  f3d4  f5g6 
 59. Rh6+            170   8   h5h6  e6d5  e3f4  g2c2  h4h5  c2c3  b6e3  e5c4 
                               e3f2 
 59.       Kd5       164   8   e6d5  e3f4  g2c2  h4h5  c2c3  b6e3  e5c4  e3f2 
 60. Bc7             169   8   e3f4  g2h2  b6c7  e5f7  h6g6  h2h4  f4f5  h4h3 
                               f3f4 
 60.       Rg7       200   8   g2g3  h6d6  d5c5  d6e6  e5c4  e3f4  g3h3  e6h6 
                               c5d5  h4h5 
 61. Bxe5            141   8   c7b8  g7b7  b8e5  d5e5  f3f4  e5d5  h6a6  b7b3 
                               e3e2  b3b2  e2f3 
 61.       Kxe5      108   9   d5e5  f3f4  e5d5  h4h5  g7g3  e3f2  g3a3  h6b6 
                               a3a2  f2g3  a2a3  g3h4