Author: Chessfun
Date: 19:10:42 02/24/04
Go up one level in this thread
On February 24, 2004 at 15:31:30, John Merlino wrote:
>On February 24, 2004 at 13:50:08, Chessfun wrote:
>
>>On February 23, 2004 at 23:43:01, Mike S. wrote:
>>
>>>On February 23, 2004 at 17:55:47, John Merlino wrote:
>>>
>>>>This should be the last position after 27.Bh4. My bad....
>>>
>>>[D]2r2r1k/p6B/1qn1b3/3pP3/1P1P1P1b/P1p2NR1/6P1/1K5R w - - 0 28
>>>
>>>According to results of a quick analysis with Hiarcs 9 on my internet pc (which
>>>is a bit slow though, 700 MHz), this position ist clearly won for white because
>>>the threats against the bk are too strong. Black's going to have to return
>>>material to avoid a direct mate. After the last move in your variant 27...Bh4,
>>>28.Bd3 simply threats #1. It seems that only 28...Qd8 or 28...Rxf4 are defense
>>>attempts which make some sense, but are not sufficient:
>>>
>>>22...bxc3 23.Qxe6+ Bf7 24.Bxg6 Qb6 25.b4 Bxe6 26.Bxh7+ Kh8 27.Rh1 Bh4 28.Bd3 Qd8
>>>(28...Rxf4 29.Nxh4 Bg4 30.Ng6+ Kg8 {(or Kg7)} 31.Nxf4) (28...c2+ {achieves
>>>nothing.}) 29.Nxh4 Qd7 30.Nf3+ Bh3 31.Rhxh3+ Qxh3 32.Rxh3+)
>>>
>>>(I didn't check the analysis prior to 28.Bd3)
>>>
>>>
>>>[Event "New York"]
>>>[Site "New York"]
>>>[Date "1947.??.??"]
>>>[Round "?"]
>>>[White "Evans, L."]
>>>[Black "Pilnick, C."]
>>>[Result "1-0"]
>>>[ECO "C13"]
>>>[PlyCount "57"]
>>>[EventDate "1947.??.??"]
>>>
>>>1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. e5 Be7 7. Qg4 O-O 8.
>>>O-O-O c5 9. h4 cxd4 10. Nce2 Nc6 11. f4 Qa5 12. Kb1 d3 13. cxd3 Bd7 14. Rh3
>>>Rac8 15. Rg3 g6 16. d4 b5 17. h5 Nb4 18. a3 Nc6 19. hxg6 fxg6 20. Nc3 b4 21.
>>>Bd3 Be8 22. Nf3 bxa3 (22... bxc3 23. Qxe6+ Bf7 24. Bxg6 Qb6 25. b4 Bxe6 26.
>>>Bxh7+ Kh8 27. Rh1 Bh4 28. Bd3 Qd8 (28... Rxf4 29. Nxh4 Bg4 30. Ng6+ Kg8 {
>>>(or Kg7)} 31. Nxf4) (28... c2+ {achieves nothing.}) 29. Nxh4 Qd7 30. Nf3+ Bh3
>>>31. Rhxh3+ Qxh3 32. Rxh3+) 23. Qxe6+ Bf7 24. Bxg6 axb2 25. Bxh7+ Kh8 26. Qh6
>>>Qa1+ 27. Kc2 b1=Q+ 28. Rxb1 Nb4+ 29. Kd1 1-0
>>
>>I don't think you looked at 28...c2+ long enough or maybe with a variety of
>>engines. There are many variations but I think the following best for both
>>sides.
>>
>>[Event "New York"]
>>[Site "New York"]
>>[Date "1947.??.??"]
>>[Round "?"]
>>[White "Evans, L."]
>>[Black "Pilnick, C."]
>>[Result "1-0"]
>>[ECO "C13"]
>>[PlyCount "57"]
>>[EventDate "1947.??.??"]
>>
>>1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. e5 Be7 7. Qg4 O-O 8.
>>O-O-O c5 9. h4 cxd4 10. Nce2 Nc6 11. f4 Qa5 12. Kb1 d3 13. cxd3 Bd7 14. Rh3
>>Rac8 15. Rg3 g6 16. d4 b5 17. h5 Nb4 18. a3 Nc6 19. hxg6 fxg6 20. Nc3 b4 21.
>>Bd3 Be8 22. Nf3 bxa3 (22... bxc3 23. Qxe6+ Bf7 24. Bxg6 Qb6 25. b4 Bxe6 26.
>>Bxh7+ Kh8 27. Rh1 Bh4 28. Bd3 c2+ 29. Kc1 Rxf4 30. Nxh4 Bg4 31. Ng6+ Kg8 32.
>>Nxf4 Nxe5 33. dxe5 Kf8 34. Rf1 Ke8 35. Nxd5 Qh6+ 36. Ne3 Rc3 37. Kd2 Qf4 38.
>>Kxc3 Qxe5+ 39. Kxc2 Qc7+ 40. Kd2 Qxg3 {See analysis}) 23. Qxe6+ Bf7 24. Bxg6
>>axb2 25. Bxh7+ Kh8 26. Qh6 Qa1+ 27. Kc2 b1=Q+ 28. Rxb1 Nb4+ 29. Kd1 1-0
>>
>>(28. Bd3 c2+ 29. Kc1 Rxf4 30. Nxh4 Bg4 31. Ng6+ Kg8 32.
>>Nxf4 Nxe5 33. dxe5 Kf8 34. Rf1 Ke8 35. Nxd5 Qh6+ 36. Ne3 Rc3 37. Kd2 Qf4 38.
>>Kxc3 Qxe5+ 39. Kxc2 Qc7+ 40. Kd2 Qxg3) See analysis
>>
>>Evans,L - Pilnick,C
>>4k3/p7/8/8/1P4b1/P2BN1q1/3K2P1/5R2 w - - 0 1
>>
>>XP 2600 128 Mb
>>
>>Analysis by Hiarcs 9:
>>41.Nxg4 Qxg4 42.Re1+ Kd8 43.Be4 Qd7+ 44.Ke2 Qg4+ 45.Kd3 Qd7+ 46.Kc3 Qc7+ 47.Kd4
>>Qd6+ 48.Bd5 Qf6+ 49.Re5 Qf4+ 50.Be4
>> ² (0.66) Depth: 14/39 00:07:53 157284kN, tb=2763
>>
>>Analysis by Shredder 8:
>>41.Bb5+ Kd8 42.Rf8+ Kc7 43.Rf7+ Kb8 44.Bc4 Bc8 45.Rf3 Qe5 46.Bd5 Qd4+
>> ² (0.48) Depth: 15/41 00:03:20 69215kN, tb=14211
>>
>>Sarah.
>
>Thanks Sarah,
>
>My analysis of the line ended at 35...Qh6+ because here things get sticky. White
>has three reasonable replies -- Ne3, Nf4 and Rf4. Depending on the time control,
>CM_SKR could choose Nf4 or Re4 -- and your analysis chose Ne3 :-). This is on a
>P4-2.4:
Hi John,
I had when I went through this line looked at all three moves. Here is
what I saw as the three mainlines. The Ne3 line was from Shredder 8. Although
the variations in selecting this move are much greater than previous when a lot
of the main moves were the only moves.
So actually with each move the branch becomes deeper. It could be in the Nf3
line Black has the stronger 40. Qxg3
Ne3
36. Ne3 Rc3 37. Kd2 Qf4 38. Kxc3 Qxg3 39. Nxg4 Qxg4 40. Rc1 Qxg2 41. Rxc2 Qg5
42. Kc4 Qg4+
Nf4
36. Nf4 Qg5 37. Bb5+ Kd8 38. Re3 Kc7 39. g3 Kb8 40. Ba6 Rc6 41. Bd3 Bf5 42. e6
Bxd3 CM Line
or
36.Nf4 Qg5 37.Bg6+ Kd8 38.Rd3+ Ke7 39.Re3 Be6 40.g3 Qh6 41.Bxc2 Bf5 42.Nd5+ Ke6
Rf4
36. Rf4 Qh1+ 37. Bf1 Be6 38. Ne3 Rc3 39. Rg6 Bb3 40. Nf5 Rd3 41. Nd6+ Kd7 42.
Rg7+ Ke6
Either way, it seems that any of these mainlines resulting from 28. c2 in the
variation starting from 22....bxc3 would result in a draw.
However as pointed out in the other posts 22...Rf5 results in a draw by force
within a matter of moves. 22....Rf5 23. Bxf5 bxc3 24. Bxe6+ Kh8 25. Bxc8 Qb5 26.
Rd2 Qf1+ 27. Ka2 Qc4 28. Kb1 Qf1 29. Ka2 Qc4
Sarah.
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