From: jhc@ivan.uucp (James H. Coombs)
Subject: Spassky-Fischer, #2; Zarkov's analysis
Reply-To: jhc@iris.brown.edu.uucp (James H. Coombs)
Organization: IRIS - Brown University
Date: Sun, 13 Sep 1992 18:04:44 GMT

Here is Zarkov's analysis of FS game 2, a KID that ended in a draw.
Sorry to be so far behind, but these things take a long time to
generate and then to work through.  (You know, 3 minutes per ply times
120 ply---6 hours).  Also, I can't find any commentary on game 2
because we have been so busy twaddling on about linguistics and
politics, so I have no direct responses to any of the postings.

In any case, here it is.  I think I found several improvements.  I
thought there was a win for F at the end, but I can't carry it out, and
Zarkov can't beat itself, so I guess not.  It was enlightening for me
to work on it and get nowhere, and to see all of White's defensive
resources (well, some of).  --Jim

Move               Score Ply  Suggested Line

  1. d4               20   0   BOOK
  1.       Nf6        12   0   BOOK
  2. c4                5   0   BOOK
  2.       g6         -8   0   BOOK
  3. Nc3              16   0   BOOK
  3.       Bg7        30   0   BOOK
  4. e4                6   0   BOOK
  4.       d6         18   0   BOOK
  5. f3                3   0   BOOK
  5.       c5         10   0   BOOK

Before, I had the impression that Spassky was playing to exchange
Queens (in games 2 and 4).  But here Fischer chooses c5 [E80] over O-O.
Spassky could have played d5 and transposed [E81], but I guess they are
both happy to be rid of the Queens.

  6. dxc5             68   8   d4c5  d6c5  d1d8  e8d8  c1e3  b7b6  e1c1  d8e8 
                               f1d3  b8c6 
  6.       dxc5       51   8   d6c5  d1d8  e8d8  c1e3  b7b6  f1d3  b8c6  e1c1 
                               d8e8 
  7. Qxd8+            93   8   d1d8  e8d8  c1e3  b7b6  e1c1  d8e8  f1d3  b8c6 
                               g1e2  e7e5 
  7.       Kxd8       83   1   e8d8 
  8. Be3              89   8   c1e3  f6d7  g1e2  d8e8  e1c1  d7e5  c1b1  e5c4 
                               e3c5 
  8.       Nfd7       83   8   f6d7  g1e2  d8e8  e1c1  b8c6  c3d5  g7e5  e2c3 
  9. Nge2             84   8   g1e2  b7b6  f3f4  c8b7  e1c1  d8c8  c1b1  h8d8 
  9.       b6         86   8   b7b6  e1c1  c8a6  b2b3  d8c8  g2g3  h8d8  f1h3 
 10. O-O-O            85   7   e1c1  c8a6  b2b3  d8c8  g2g3  h8d8  f1h3 
 10.       Na6        81   8   c8a6  b2b3  b8c6  g2g3  d8e8  c3d5  g7e5  f1g2 

It has all been E80/1 to this point.  Eco gives Nc6 here.  I never did figure
out what F was after with Na6-c7.

 11. g3               90   8   f3f4  d8e8  g2g4  c8b7  f1g2  a8d8  h2h4  a6b4 
 11.       Nc7        72   8   d8e8  e3f4  d7e5  f4e5  g7e5  f3f4  e5g7  f1g2 
 12. f4              100   7   f1g2  d8e8  f3f4  c8b7  d1d3  a8d8  h1d1 
 12.       e6         64   8   c8a6  f1h3  e7e6  b2b3  d8e8  d1d6  a6b7  h1d1 
 13. Bh3              94   8   f1g2  c8b7  h2h4  d8e7  h4h5  a8d8  h5h6  g7f6 
 13.       Ke7        47   7   c8a6  b2b3  a6b7  c1b1  d8e7  h3g2  a8d8 
 14. Rhf1             61   7   h1e1  c8a6  b2b3  a6b7  a2a3  d7f6  e4e5 
 14.       h6         58   7   c8a6  f4f5  a6c4  f5e6  c4e6  h3e6  f7e6 
 15. e5               89   7   f4f5  d7e5  f5g6  f7g6  e3f4  c8b7  h3g2 
 15.       Bb7        76   7   c8b7  f1g1  a8d8  h3g2  b7g2  g1g2  f7f5 
 16. g4               96   7   h3g4  a8d8  g4f3  b7f3  f1f3  f7f6  e5f6  d7f6 
 16.       Rad8       64   7   h8d8  f1g1  f7f6  e5f6  d7f6  g4g5  h6g5  f4g5 
 17. Ng3              28   7   e3f2  g6g5  f2g3  e7e8  f1e1  b7f3  d1d3 
 17.       f6         55   7   f7f6  e5f6  d7f6  f4f5  d8d1  c3d1  g6f5  g4f5 
                               e6e5 
 18. Nce4             66   7   e5f6  d7f6  d1d8  h8d8  g4g5  f6g8  c3e4  g7d4 
 18.       fxe5       -4   7   f6e5  g4g5  d8f8  h3g2  h6g5  f4e5  f8f1  e3g5 

 Well, F has equalized, but I don't see anything particularly significant
 in this move.  I mean, I don't see that Spassky missed any opportunities.
 
                               f1f6  e5f6  d7f6 
 19. f5                9   7   e4d6  b7a8  g3e4  a8e4  d6e4  e5f4  e3f4 

 I did play the suggested Nd6 through for a bit.  It looked promising but
 came to nought.
 
 19.       Bxe4      -16   7   e6f5  e4d6  d7f6  d6b7  d8d1  f1d1  f5f4  g4g5 
                               h6g5 
 20. Nxe4            -35   8   g3e4  g6g5  d1e1  d7f6  e4c5  b6c5  e3c5  e7f7 
                               e1e5 
 20.       gxf5       -4   7   g6g5  d1e1  d7f6  e4c5  b6c5  e3c5  e7e8  f5e6 
                               c7e6  e1e5 
 21. gxf5             19   8   g4f5  d7f6  d1d8  h8d8  e4f6  g7f6  e3h6  d8h8 
 21.       Nf6        50   7   d7f6  d1d8  h8d8  e4f6  g7f6  e3h6  d8h8 
 22. Rg1              24   8   d1d8  h8d8  f5e6  d8d3  e4g3  c7e6  g3f5  e7f7 
                               f5h6  g7h6  h3e6  f7e6  e3h6 

Again, I played the recommended line, but saw nothing superior in it.

 22.       Rxd1+       5   8   d8d1  c1d1  c7e8  e4f6  g7f6  f5e6  e8g7  g1g6 
                               g7e6  e3h6 
 23. Kxd1             19   9   c1d1  c7e8  e4f6  g7f6  f5e6  e8g7  g1g6  g7e6 
                               e3h6 
 23.       Bf8        11   8   c7e8  e4g3  e8c7  f5e6  c7e6  g3f5  e7f7  f5d6 
                               f7e7  h3e6  e7d6  g1g7  d6e6  g7a7 
 24. Nxf6             -5   8   e4f6  e7f6  g1f1  e6f5  h3f5  c7e6  f5e4  f6e7 
                               d1c1 
 24.       Kxf6      -11   8   e7f6  g1f1  e6f5  h3f5  c7e6  d1c1  e6d4  f5e4 
                               f6e7 
 25. Rf1               0   8   g1g6  f6f7  d1e2  f8g7  a2a3  e5e4  b2b4  c5b4 
                               a3b4 
 25.       exf5       -3   8   e6f5  f1f5  f6g6  f5f3  f8e7  h3f5  g6f7  f5e4 
                               e7f6  d1e2  f7e7 
 26. Rxf5+            -4   7   f1f5  f6g6  f5e5  f8d6  e5e4  d6h2  e4g4  g6f6 
                               d1c2 
 26.       Kg7       -11   8   f6g6  f5e5  f8d6  e5e4  d6h2  e4g4  g6f6  d1c2 
                               c7e6 
 27. Rxe5             40   8   f5e5  f8d6  e3f4  c7e6  f4g3  h8d8  e5d5  d6g3 
                               d5d8  e6d8  h2g3 
 27.       Bd6        34   9   f8d6  e3f4  h8e8  e5e8  c7e8  f4g3  d6g3  h2g3 
 28. Re4              43   8   e3f4  c7e6  f4g3  e6d4  e5e4  d6g3  h2g3  g7g6 

Now here it seems that White can improve---there is no reason to give up
h2.  I played it through as 28.Bf4 Ne6 29.Bg3 Nd4 30.Rd5 Bxg3 31.Rd7+
Kf6 32.hxg3 Rg8 33.g4 Rg7.  I was giving Zarkov only about a minute per
move, but it looks plausible.
 
 28.       Bxh2        5   8   d6h2  h3g2  h2d6  e4g4  g7f7  d1c2  c7e6  g2d5 
 29. Ke2             -10   7   e4e7  g7f6  e7d7  a7a6  d1c2  h2g3  h3g2  c7e6 
 29.       h5        -33   7   h2d6  h3d7  h8d8  d7c6  h6h5  e4h4  d8h8 
 30. Re7+            -28   7   b2b4  h2d6  b4c5  b6c5  e2d3  h8f8  h3d7 
 30.       Kf6       -54   9   g7f6  e7d7  h2e5  h3g2  a7a6  b2b4  c5b4  e3b6 
 31. Rd7             -48   8   e7d7  a7a5  e2d2  c7e6  d7b7  h8b8  b7d7  h2f4 
 31.       Be5       -49   8   h2e5  e2d2  a7a6  d2c2  h8e8  e3f2  c7e6  f2h4 
                               f6g6 
 32. b3              -36   7   e2d2  a7a6  d2c2  c7e6  d7b7  h8b8  b7h7 
 32.       h4        -58   7   a7a5  a2a3  h5h4  e2f3  c7e6  d7b7  h8b8  b7b8 
                               e5b8 
 33. Kf3             -44   7   e2d2  a7a6  d2c2  c7e6  d7b7  h8b8  b7h7 
 33.       Rg8       -36   7   h8g8  e3f2  e5g3  f2e3  g8e8  d7h7  e8e7  h7e7 
                               f6e7 
 34. Bg4             -37   8   e3f2  e5g3  d7h7  c7e6  f2e3  e6g7  a2a3  g8e8 
 34.       h3        -46   7   g8g7  d7g7  f6g7  e3g5  e5g3  g4f5  g7f7 
 35. Rh7               5   7   d7h7  h3h2  e3f4  c7e6  f4e5  f6e5  h7h2  e6d4 
                               f3g3 
 35.       h2          0   7   h3h2  e3f4  c7e6  f4e5  f6e5  g4e6  h2h1  h7h1 
                               g8f8  f3e3  e5e6 
 36. Bf4            -115   7   e3f4  g8f8  f4h2  f6g6  f3e4  g6h7  h2e5  f8e8 
 36.       Rf8      -122   7   g8f8  f4h2  f6g6  f3e4  g6h7  h2e5  f8e8  g4d7 
 37. Bxe5+          -118   8   f4h2  f6g6  f3e4  g6h7  h2e5  f8f7  g4f5  h7g8 
                               a2a3  c7e8 
 37.       Kg6+     -160   8   f6g6  f3g2  g6h7  g2h2  c7e8  h2g3  e8f6  g4f5 
                               h7g8  f5e6  g8g7 
 38. Ke4            -150   8   f3e4  g6h7  e5h2  c7e8  e4e3  h7g6  h2f4  e8f6 
 38.       Kxh7     -161   8   g6h7  e5h2  c7e8  g4f5  h7g7  h2f4  e8f6  e4e5 
                               f8d8  a2a3 

So F wins the exchange.  And I thought people said that he was playing
like a bum.

 39. Bxh2           -149   9   e5h2  c7e8  g4f5  h7g7  h2f4  e8f6  e4e5  f8e8 
                               e5d6  e8e2  a2a3 
 39.       Re8+     -143   8   c7e8  g4f5  h7g7  h2f4  e8f6  e4e5  f8e8  f5e6 
                               a7a6  e5d6  f6e4  d6d7 
 40. Kf5            -129   9   h2e5  c7e6  g4h5  e8d8  h5g4  e6g5  e4f4  h7h6 
                               g4f5  d8d2 
 40.       Ne6      -164   8   c7e6  f5e4  e6d4  e4d5  e8g8  g4d7  g8g5  d5e4 
                               g5g2  h2e5  g2a2  e5d4  c5d4  e4d4 
 41. Kf6            -161   8   f5e5  e6g7  e5d6  e8e4  g4f3  e4d4  d6c6  d4d2 
                               f3e4  h7g8  e4d5  g8h8  h2e5  d2a2 
 41.       Nd4      -177   8   e6d4  f6f7  e8e4  g4h5  h7h6  h5g6  e4g4  g6d3 
 42. Bd6            -185   8   h2d6  e8g8  g4h3  g8g6  f6e5  d4c6  e5d5  c6b4 
                               d5e5  b4a2  h3f5 
 42.       Re4      -177   8   e8g8  g4h3  g8g6  f6e5  g6h6  h3d7  h6h2  b3b4 
                               h2a2  b4c5 
 43. Bd7            -165   8   f6g5  h7g7  d6b8  e4e7  b8d6  e7e1  d6g3  e1e3 
 43.       Re2      -283   8   e4e2  b3b4  c5b4  d6b4  e2a2  f6e5  d4f3  e5d5 
                               a7a5 
 44. a4             -279   8   b3b4  c5b4  d6b4  e2a2  f6e5  d4f3  e5d5  a7a5 
                               d7f5  h7g8  b4d6 
 44.       Rb2      -291   8   d4b3  d6b8  e2f2  f6e6  a7a6  e6d5  h7g6  d5c6 
                               f2f6  c6d5 
 45. Bb8            -266   8   a4a5  b2b3  f6e5  b3g3  a5b6  a7b6  e5d5  g3g5 
                               d6e5 
 45.       a5       -286   8   a7a5  f6e5  b2b3  b8c7  d4f3  e5d5  h7g6  d5c6 
                               f3d4  c6b7 
 46. Ba7            -290   8   b8f4  b2b3  f6e5  h7g6  d7e8  g6g7  e5d5  b3d3 
                               e8h5 
 46.       Rxb3     -280   8   b2b3  f6e7  h7g7  e7d6  b3b4  d6c7  b4c4  c7b6 
 47. Ke5            -257   8   f6e5  h7g7  e5d6  b3b4  d6c7  b4c4  a7b6  d4b3 
 47.       Nf3+     -255   8   b3b4  e5d6  b4c4  a7b6  d4b3  d7e6  c4b4  b6c5 
                               b3c5  d6c5  b4a4 

I think Zarkov overesimates Rb4.  I thought it looked good and tried playing
it through: 47...Rb4 48.Kd6 Rxc4 49.Bxb6 Nb3.  Then I saw no real progres.

 48. Kd6            -152   9   e5d6  h7g6  d7b5  b3d3  d6c6  f3d4  c6b6  d4b3 
                               b6c6  d3d8  a7b6 
 48.       Nd2      -158   8   h7g6  d7b5  b3d3  d6c6  f3d4  c6b6  d4b3  b6c6 
                               d3d8  a7b6 
 49. Be6            -175   9   d7b5  b3h3  a7b6  d2b3  b5d7  h3h5  d6c7  h7g7 
                               d7g4 
 49.       Rb4      -301   8   b3b4  d6c6  d2c4  e6c4  b4c4  a7b6  c4a4  c6c5 
 50. Kc6            -274   9   d6c6  d2c4  e6c4  b4c4  a7b6  c4a4  c6c5  h7g6 
                               c5b5 
 50.       Nb3      -304   9   d2c4  e6c4  b4c4  a7b6  c4a4  c6c5  a4a2  c5b5 
                               a5a4 

I wrestled with this one for hours.  I even set Zarkov against itself.
None of us could convert into a win.  50...Nxc4 51.Bxc4 Rxc4 52.Bxb6
Rxa4 53.Kxc5 Ra2 54.Kb5 a4.  And on and on.  Actually, I did manage a
win at one point, but then I couldn't find it again, so I think it was
just the vagaries of ad hoc play.  It still looks better to me to have
that passed pawn and White's all off, but Black's King is so far away
from the action that White manages to get into good blockading position
first.  The trick would seem to be to keep White's King from getting
in front of the pawn, but even then the Bishop and King keep Black's
King from taking over the defensive task so that the Rook can drive
White's King away.

 51. Bd5            -117   9   e6d5  b4a4  a7b6  a4b4  b6a7  h7g6  a7c5  b3c5 
                               c6c5 
 51.       Rxa4     -126   9   b4a4  a7b6  a4b4  b6a5  b3a5  c6c5  b4b8  c5d6 
                               h7g7  c4c5  b8d8  d6e5 
 52. Bxb6           -160   9   a7b6  h7g7  b6c5  b3c5  c6b5  g7f6  b5c5  f6e5 
                               d5c6 
 52.       Ra1      -154   8   h7g7  b6c5  b3c5  c6b5  g7f6  b5c5  f6e5  d5c6 
 53. Bxc5           -140   8   b6c5  b3c5  c6c5  a5a4  c5b4  a4a3  c4c5  a3a2 
                               d5e4  h7h6 
 53.       a4       -147   8   b3c5  c6c5  h7g6  c5b6  a5a4  c4c5  a4a3  c5c6 
 54. Bb4            -125   7   c5d6  h7g6  c6b6  b3d4  c4c5  a4a3  c5c6 
 54.       a3       -118   7   h7g6  b4c3  a1c1  c3b2  c1d1  c6b5  d1d2 
 55. c5             -114   7   b4a3  a1a3  c4c5  b3d4  c6b6  h7g6  c5c6  a3c3 
 55.       Nd4+      -60   8   b3d4  c6b6  a3a2  c5c6  a1b1  d5a2  b1b4  b6c5 
                               b4b2  c6c7  b2c2  c5d4  c2c7 
 56. Kd7            -102   8   c6d7  a1d1  b4a3  d4b5  d7c6  b5a3  d5f3  d1c1 
 56.       Rd1      -105   8   a1d1  b4a3  d4c2  c5c6  c2a3  c6c7  a3c4  d7c6 
 57. Bxa3           -107   8   b4a3  d4c2  d7c6  c2a3  d5f3  d1e1  c6d5  h7g6 
 57.       Nc2      -111   8   d4c2  d7c6  c2a3  d5b3  d1g1  b3d5  g1g6  c6b7 
                               a3b5 
 58. c6              -65   9   c5c6  c2e3  c6c7  e3d5  d7c6  d5c7  c6c7  d1e1 
                               a3c5 
 58.       Rxd5+     -70   8   c2e3  c6c7  e3d5  d7c6  d5c7  c6c7  h7g8  c7c6 
 59. Bd6               3   9   a3d6  d5d6  d7d6  c2d4  c6c7  d4b5  d6c5  b5c7 
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