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Subject: Re: Did Rebel Escape a Loss here?

Author: Mark Rawlings

Date: 08:10:46 08/28/99

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On August 28, 1999 at 10:14:51, Howard Exner wrote:

>On August 28, 1999 at 08:03:19, odell hall wrote:
>
>>Hi
>>
>> This game was played at Santa Domingo last year, Time control was 40/2.
>>At move 36. Rebel played Bxe4? Accordinging to all my programs this move should
>>lose. Not being real great at endgames I cannot be so sure. Maybe someone with
>>the crafty endgame tablebases can say for sure. Did the fide Master go astray or
>>did Rebel simply produce an endgame brilliancy? Here is the epd for the Crucial
>>position, as well as the complete game.`
>
>I have this game in my collection also but it has the player's colors
>reversed. So actually Rebel is the player of the black pieces and won
>this game according to the info in my database. In playing over
>the game this looks like how Rebel plays as black. Also my Rebel 10 does not
>consider the move Bxe4. It looks more like a move a human would play in time
>trouble.
>>
>>8/K5pp/8/2pk4/4p3/2P4n/PPB2P2/8 w - - id REBEL 10 400MHZ 128 - NM JUAN ML.
>>JAQUEZ; bm c2e4;
>>
>>
>>
>>[Event "4ta. COPA SAMANEL"]
>>[Site "?"]
>>[Date "1998.12.20"]
>>[Round "?"]
>>[White "REBEL 10 400MHZ 128"]
>>[Black "NM JUAN ML. JAQUEZ"]
>>[Result "1-0"]
>>[WhiteElo "2555"]
>>[BlackElo "2205"]
>>[ECO "B01"]
>>
>>1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 c6 5. Bc4 Bf5 6. Nf3 Nf6 7. O-O
>>e6 8. Bf4 Nbd7 9. Qe2 Bg4 10. h3 Bxf3 11. Qxf3 Rd8 12. Rad1 Bb4 13. Ne4
>>Nxe4 14. Qxe4 O-O 15. Bb3 Nf6 16. Qe2 Bd6 17. Bxd6 Rxd6 18. c3 Rfd8 19.
>>Rfe1 b6 20. Qe5 c5 21. dxc5 Qxc5 22. Qxc5 bxc5 23. Rxd6 Rxd6 24. Rd1 Rxd1+
>>25. Bxd1 Kf8 26. Kf1 Ke7 27. Ke2 e5 28. Kd3 Nd5 29. g3 f5 30. Kc4 Kd6 31.
>>Kb5 e4 32. Ka6 f4 33. gxf4 Nxf4 34. Bc2 Kd5 35. Kxa7 Nxh3 36. Bxe4+ Kxe4
>>37. b4 cxb4 38. cxb4 Nxf2 39. b5 Kd5 40. b6 Nd3 41. b7 Ne5 42. Kb6 Nd7+
>>43. Kc7 Nc5 44. b8=N h5 45. Nc6 h4 46. Ne7+ Ke4 47. Kc6 Nd3 1-0


Looks like white missed a draw on move 44:

end-game phase
              clearing hash tables
              time surplus   3:35  time limit 10.00 (1:00)
          s   depth   time  score   variation (1)
               10     1.30     ++   44. a4!!
               10     3.33  -2.60   44. a4 h5 45. a5 Kc4 46. b8=N Kb5 47.
                                    Kd6 Nb7+ 48. Ke6 Nxa5 49. Nd7
               10->   3.36  -2.60   44. a4 h5 45. a5 Kc4 46. b8=N Kb5 47.
                                    Kd6 Nb7+ 48. Ke6 Nxa5 49. Nd7
               11     3.96     ++   44. a4!!
               11->   7.74  -2.21   44. a4 h5 45. a5 Kc4 46. b8=N Kb5 47.
                                    Kd6 Nb7+ 48. Ke6 Nxa5 49. Nd7
               12     8.33     --   44. a4
               12     9.77     ++   44. a4!!
               12    33.72   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               12->  34.47   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               13    35.28   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               13->  36.30   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               14    38.47   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               14->  40.43   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               15    42.51   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               15->  44.66   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               16    49.78   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               16->  57.91   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               17     1:05   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               17->   1:16   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               18     1:26   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               18->   1:40   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               19     2:11   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               19->   2:55   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               20     3:36   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               20->   5:07   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+
               21     6:17   0.00   44. a4 Na6+ 45. Kb6 Nb8 46. Kc7 Na6+


Mark



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