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Subject: Re: The critical position! From a win to a lose........

Author: Uri Blass

Date: 15:40:54 11/21/05

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On November 21, 2005 at 13:59:05, George Tsavdaris wrote:

>On November 21, 2005 at 13:53:46, George Tsavdaris wrote:
>
>>On November 21, 2005 at 13:41:52, Thomas Logan wrote:
>>
>>If you look at the game from move 36 and beyond you will understand.....
>>
>>[Event "II Man vs Machine, Bilbao"]
>>[Site "?"]
>>[Date "2005.11.21"]
>>[Round "?"]
>>[White "Ponomariov"]
>>[Black "Fritz"]
>>[Result "*"]
>>[Annotator "Holger_Lieske"]
>>[PlyCount "89"]
>>[EventDate "2005.??.??"]
>>
>>1. d4 Nf6 2. c3 d5 3. Bf4 Bf5 4. e3 e6 5. Qb3 Nbd7 6. Qxb7 Bd6 7. Bxd6 cxd6 8.
>>Qa6 Rb8 9. Qa3 Qb6 10. b4 O-O 11. Nd2 e5 12. Ngf3 Qc7 13. Ba6 e4 14. Ng1 Rb6
>>15. Rc1 Nb8 16. Be2 Rc8 17. Bd1 Bd7 18. Ne2 Bb5 19. O-O Nbd7 20. Nb3 h5 21. Re1
>>h4 22. h3 Rb7 23. Na5 Rbb8 24. Ba4 a6 25. Bb3 Nb6 26. Qb2 Qd7 27. a3 Rc7 28.
>>Qa2 Rbc8 29. Nf4 Qf5 30. a4 Bd3 31. g4 hxg3 32. fxg3 g5 33. g4 Qh7 34. Nh5 Nxh5
>>35. gxh5 Qxh5 36. Qh2 {no new moves from Official site...waiting....} Qh4 37.
>>Kg2 Rxc3 38. Rxc3 Rxc3 39. Qg3 Bc2 40. Qxh4 gxh4 41. Rc1 Rxb3 42. Nxb3 Bxb3 43.
>>a5 Nc4 44. b5 Ba4 45. bxa6 *
>>
>
> And all happened because of move 39...Bc2?? Much better was 39...Qxg3 it seems.
>It should actually win with Qxg3 but now it lost.......
>
>[D]6k1/5p2/pn1p4/N2p2p1/PP1Pp2q/1BrbP1QP/6K1/4R3 b - - 0 39


I am not sure if it was one mistake

Fritz could play better also later

41...Bxb3 was the best chance for a draw after 39...Bc2
42...Bd3 was also better than the game move 42...Bxb3 but probably not enough
for a draw.


Ponomariov,R - Fritz, Man vs Machine II 2005
6k1/5p2/pn1p4/N2p4/PP1Pp2p/1Br1P2P/2b3K1/2R5 b - - 0 1

Analysis by Fruit 2.2.1:

41...Rxb3 42.Nxb3 Bxb3
  µ  (-0.86)   Depth: 1/5   00:00:00
41...Rxb3 42.Nxb3 Bxb3 43.b5 axb5 44.axb5
  µ  (-0.96)   Depth: 2/8   00:00:00
41...Rxb3 42.Nxb3 Bxb3 43.b5 Nc4
  µ  (-1.02)   Depth: 3/8   00:00:00
41...Rxb3 42.Nxb3 Bxb3 43.b5 a5 44.Rc7 Bxa4
  µ  (-1.34)   Depth: 4/10   00:00:00
41...Rxb3 42.Nxb3 Bxb3 43.b5 a5 44.Rc7 Bxa4
  µ  (-1.34)   Depth: 5/12   00:00:00
41...Rxb3 42.Nxb3 Bxb3 43.b5 axb5 44.axb5 Bc4 45.Rb1 Kg7
  µ  (-1.32)   Depth: 6/15   00:00:00  9kN
41...Rxb3 42.Nxb3 Bxb3 43.Rc6 Nc4 44.Kf2 Bxa4 45.Rxa6 Bd7
  -+  (-1.63)   Depth: 7/15   00:00:00  21kN
41...Rxb3 42.Nxb3 Bxb3 43.a5 Nc4 44.Kf2 Kg7 45.Rg1+ Kf6 46.Rg4 Ba4 47.Rxh4
  -+  (-1.58)   Depth: 8/17   00:00:00  40kN
41...Rxb3 42.Nxb3 Bxb3 43.a5 Nc4 44.Kf2 f5 45.Rb1 Ba4 46.Ra1 Bd7 47.Rg1+ Kf7
  -+  (-1.67)   Depth: 9/19   00:00:00  70kN
41...Rxb3 42.Nxb3 Bxb3 43.a5 Nc4 44.Kf2 Ba4 45.Rg1+ Kf8 46.Rg4 Nb2 47.Rxh4 Nd3+
48.Ke2 Nxb4
  -+  (-1.76)   Depth: 10/21   00:00:01  127kN
41...Rxb3 42.Nxb3 Bxb3 43.a5 Nc4 44.Kf2 Ba4 45.Rg1+ Kf8 46.Rg4 Nb2 47.Rxh4 Nd3+
48.Ke2 Nxb4
  -+  (-1.76)   Depth: 11/21   00:00:01  212kN
41...Rxb3 42.Nxb3 Bxb3 43.a5 Nc4 44.b5 Nxe3+ 45.Kf2 Nc4 46.bxa6 Ba4 47.a7 Bc6
48.Rb1 e3+ 49.Ke2 Kg7
  µ  (-1.15)   Depth: 12/25   00:00:01  402kN
41...Rxb3 42.Nxb3 Bxb3 43.a5 Nc4 44.b5 Nxe3+ 45.Kf2 Nc4 46.bxa6 Ba4 47.a7 Bc6
48.Rb1 e3+ 49.Ke2 Kg7 50.Rb8
  µ  (-0.88)   Depth: 13/25   00:00:01  662kN
41...Rxb3 42.Nxb3 Bxb3 43.b5 a5 44.Rc6 Nxa4 45.b6 Nxb6 46.Rxb6 a4 47.Rb7 Kg7
48.Kf2 Kf6 49.Ra7 Ke6
  ³  (-0.53)   Depth: 14/32   00:00:01  1443kN
41...Rxb3 42.Nxb3 Bxb3 43.b5 a5 44.Rc6 Nxa4 45.Rxd6 Bc4 46.b6 Nxb6 47.Rxb6 a4
48.Rb8+ Kg7 49.Ra8 Bb5 50.Ra7 Kf6
  =  (-0.18)   Depth: 15/32   00:00:02  2294kN
41...Rxb3 42.Nxb3 Bxb3 43.b5 a5 44.Rc6 Nxa4 45.Rxd6 Kg7 46.b6 Nxb6 47.Rxb6 a4
48.Rb7 Kf6 49.Kf2 Ke6 50.Ke2 Bc4+ 51.Kd2
  =  (-0.09)   Depth: 16/32   00:00:05  5311kN
41...Rxb3 42.Nxb3 Bxb3 43.b5 a5 44.Rc6 Nxa4 45.Rxd6 Kg7 46.b6 Nxb6 47.Rxb6 a4
48.Rb7 Kf6 49.Kf2 Ke6 50.Rb6+ Kf5 51.Rb7 f6
  =  (-0.23)   Depth: 17/34   00:00:09  10151kN
41...Rxb3 42.Nxb3 Bxb3 43.b5 a5 44.Rc6 Nxa4 45.Rxd6 Kg7 46.b6 Nxb6 47.Rxb6 a4
48.Ra6 f6 49.Kf2 Kf7 50.Ke1 Kg6 51.Kd2 Kf5
  =  (-0.10)   Depth: 18/35   00:00:13  14579kN
41...Rxb3 42.Nxb3 Bxb3 43.a5 Nc4 44.b5 Ba4 45.bxa6 Bc6 46.Kf2 Nxa5 47.a7 Nc4
48.Rb1 Kg7 49.Rb8 Kf6 50.a8Q Bxa8 51.Rxa8 Kf5 52.Rh8 Kg5 53.Rg8+ Kf5
  ²  (0.46)   Depth: 19/40   00:00:26  28811kN
41...Rxb3 42.Nxb3 Bxb3 43.a5 Nc4 44.b5 Ba4 45.bxa6 Bc6 46.Kf2 Nxa5 47.a7 Nc4
48.Rb1 Kg7 49.Rb8 Kg6 50.Rg8+ Kf6 51.a8B Bxa8 52.Rxa8 Kf5 53.Ke2 f6
  ²  (0.54)   Depth: 20/42   00:01:35  97614kN
41...Rxb3 42.Nxb3 Bd3 43.Ra1 Nc4 44.Kf2 f5 45.Nc1 f4 46.Nxd3 fxe3+ 47.Ke2 exd3+
48.Kxd3 Kf7 49.b5 axb5 50.axb5 Kf6 51.b6 Nxb6 52.Kxe3 Kf5 53.Rf1+ Kg5 54.Kd3 Nc4
  +-  (1.57)   Depth: 21/60   00:05:19  353334kN
41...Nc4 42.Bxc4 dxc4 43.b5 axb5 44.axb5 Ra3 45.Nxc4 Ra2 46.Nxd6 Bd3+ 47.Kg1 Rb2
48.Rc8+ Kg7 49.Rc5 Kf6 50.Rh5 Rb1+ 51.Kf2 Rb2+ 52.Ke1 Ke7 53.Nxe4 Bxb5 54.Nc3
Bd3 55.Rxh4
  ±  (1.12)   Depth: 21/60   00:06:33  429778kN
41...Bxb3 42.Rxc3 Bxa4 43.Rc7 Bb5 44.Kf2 Kg7 45.Nc6 Kf6 46.Nd8 Nc4 47.Rxf7+ Kg6
48.Rc7 Nb2 49.Ke1 Nd3+ 50.Kd2 Nxb4 51.Ne6 Kf5 52.Nf4 a5
  ²  (0.51)   Depth: 21/60   00:06:41  440424kN
41...Bxb3 42.Rxc3 Bxa4 43.Rc7 Bb5 44.Kf2 Kg7 45.Nc6 Kf6 46.Rb7 Nc4 47.Na7 Ba4
48.b5 axb5 49.Nxb5 Na5 50.Ra7 Bxb5 51.Rxa5 Bd7 52.Rxd5 Bxh3 53.Rxd6+ Be6
  ²  (0.50)   Depth: 22/60   00:08:09  525463kN
41...Bxb3 42.Rxc3 Bxa4 43.Rc7 Kg7 44.Kf2 Kf6 45.Nc6 Na8 46.Ra7 Bxc6 47.Rxa6 Bb7
48.Ra7 Bc6 49.b5 Bxb5 50.Rxa8 Bd7 51.Kg2 Ke6 52.Rh8 Bb5 53.Rxh4
  ²  (0.59)   Depth: 23/60   00:14:32  894347kN

(,  22.11.2005)



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