Author: Uri Blass
Date: 09:18:29 05/02/02
Go up one level in this thread
On May 02, 2002 at 12:06:32, Ron Murawski wrote:
>On May 02, 2002 at 11:40:57, Robert Hyatt wrote:
>
>>On May 02, 2002 at 11:22:14, Ron Murawski wrote:
>>
>>>Hi all,
>>>
>>>This one is not too tough, but some engines don't see it.
>>>
>>>[D] 2b1r3/6kn/1q1p1pp1/1pnPb2p/r1pBP2P/2P3N1/P2QNRP1/1B3R1K w - - 0 43
>>>
>>>bm: Nxh5+
>>>
>>>This was from a game, it was Horizon's 43rd move.
>>>
>>>[Event "Computer chess game"]
>>>[Site "JUBBY"]
>>>[Date "2002.05.02"]
>>>[Round "1"]
>>>[White "Horizon"]
>>>[Black "Quark v1.50"]
>>>[Result "1-0"]
>>>[TimeControl "40/900"]
>>>
>>>1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8.
>>>c3 O-O 9. h3 h6 10. d4 Re8 11. Nbd2 Bf8 12. Nf1 Bb7 13. Ng3 Na5 14. Bc2 Nc4
>>>15. Bd3 c5 16. d5 Nb6 17. Be3 c4 18. Bc2 Qc7 19. Nh4 g6 20. Qd2 Kh7 21. Kf1
>>>Bg7 22. f4 exf4 23. Bxf4 Nfd7 24. Nf3 a5 25. Nd4 Ba6 26. Nc6 Na4 27. Rab1
>>>Nac5 28. Kg1 Bb7 29. Nd4 Qb6 30. Be3 Be5 31. Bf2 Nf6 32. Nde2 a4 33. Rf1
>>>Kg7 34. Rbe1 a3 35. bxa3 Rxa3 36. Bb1 Ra4 37. Bd4 Rh8 38. Rf3 Nh7 39. Ref1
>>>f6 40. R3f2 Re8 41. Kh1 h5 42. h4 Bc8 43. Nxh5+ gxh5 44. Rxf6 Nxf6 45. Qg5+
>>>Kh7 46. Rxf6 Bxf6 47. Bxf6 Re7 48. Qxh5+ Kg8 49. Qh8+ Kf7 50. Qg7+ Ke8 51.
>>>Qxe7#
>>>{White Mates} 1-0
>>>
>>>Ron
>>
>>
>>This isn't a "king safety" position. It is a pure tactical position:
>>
>> 9 1.18 0.19 43. Bxe5 Rxe5 44. Nd4 Bd7 45. Qf4 Qc7
>> 46. Kg1 Re7 47. Rf3 Kg8
>> 9 6.12 ++ 43. Nxh5+!!
>> 9 9.40 3.10 43. Nxh5+ gxh5 44. Rxf6 Bxf6 45. Rxf6
>> Nxf6 46. Qg5+ Kh7 47. e5+ Nd3 48. Bxb6
>> Nxd5 49. Qxh5+
>> 9-> 9.40 3.10 43. Nxh5+ gxh5 44. Rxf6 Bxf6 45. Rxf6
>> Nxf6 46. Qg5+ Kh7 47. e5+ Nd3 48. Bxb6
>> Nxd5 49. Qxh5+
>> 10 14.68 ++ 43. Nxh5+!!
>> 10 27.20 4.34 43. Nxh5+ gxh5 44. Rxf6 Bxf6 45. Bxf6+
>> Kg6 46. e5+ Nd3 47. Bxd3+ cxd3 48.
>> Qxd3+ Kh6 49. Bg5+ Nxg5 50. Rf6+ Kg7
>> 51. Qg6+ Kh8 52. Qxe8+ Kg7 53. Qg6+
>> Kh8 54. Qxg5
>> 10-> 27.35 4.34 43. Nxh5+ gxh5 44. Rxf6 Bxf6 45. Bxf6+
>> Kg6 46. e5+ Nd3 47. Bxd3+ cxd3 48.
>> Qxd3+ Kh6 49. Bg5+ Nxg5 50. Rf6+ Kg7
>> 51. Qg6+ Kh8 52. Qxe8+ Kg7 53. Qg6+
>> Kh8 54. Qxg5
>
>
>Bob,
>
>Maybe I don't understand the meaning of "king safety"? I thought it meant king
>mating threats. No???
No
It may mean position when you sacrifice a piece for some pawns when the win is
only many plies later(for example the game Junior-Nimzo from the WCCC when
Junior sacrificed a piece and only many moves later programs could find the win.
>
>How does a "pure tactical" mate-threat position differ from a "king safety"
>position?
>
>BTW, is it possible that this position is a test of move extensions while in
>check?
It is possible that this position test extensions.
I am not sure if check extensions are enough and it is possible that other
extensions also help crafty to find the win at depth 9.
Uri
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.