Originally posted by greenpawn34
I have a hook screwed into the ceiling of my study.
In the corner is a long piece of sturdy rope and a chair.
After seeing that game I moved the chair under the hook and
was tying the rope to the hook when Monnbus's PM arrived.
That was close. I promise never to look at RHP Rook v Knight endings again.
I am right about the number of times it ...[text shortened]... Knight
and spot the winning chances when you have the Rook
The chances are you will need to.
Hi GreenPawn, the nice thing about K+B+B v K is that it's easy. Once one's got the basic idea of driving the king to a corner then the actual checkmate can be found over the board. The one to ignore is K+N+B v K, which I've had once in a pub game - by luck I'd recently learnt how to do it and managed it in the five minutes left despite the beer. The basic difference between the two endings is that if faced with K+B+B v K I could do it now, I'm not confident that I could do the K+B+N v K ending.
I've never had had either K + B + B or K + B + N here and I've had K + N v K + R once, against Marco Krale back in 2005 (although I was slack about downloading my games for a while so I might have missed one, even so this is one game in fifteen hundred), so really I don't think any of them are particularly likely.
According to EGTB I lost the game a couple of times before I was offered a draw:
[Event "Syn Grouped Random"]
[Site "http://www.playtheimmortalgame.com"]
[Date "2005.02.07"]
[EndDate "2005.03.09"]
[Round "1"]
[White "DeepThought"]
[Black "Marko Krale"]
[WhiteRating "1792"]
[BlackRating "1596"]
[WhiteElo "1792"]
[BlackElo "1596"]
[Result "1/2-1/2"]
[GameId "940176"]
1. e4 e5 2. Ng1f3 Nb8c6 3. Bf1b5 a6 4. Bb5a4 b5 5. Ba4b3 Bf8e7 6. O-O d6 7. h3 Ng8f6 8. Rf1e1 O-O 9. c3 Bc8e6 10. d4 Be6xb3 11. axb3 exd4 12. cxd4 Nc6b4 13. Nb1c3 Rf8e8 14. Bc1g5 h6 15. Bg5h4 Nf6h7 16. Bh4xe7 Re8xe7 17. Nf3h4 g6 18. Qd1d2 Nb4c6 19. d5 Nc6b4 20. Qd2xh6 Nb4c2 21. Ra1d1 Nc2xe1 22. Rd1xe1 Qd8f8 23. Qh6xf8 Kg8xf8 24. Nh4f3 Ra8e8 25. Nf3d2 f5 26. f3 Nh7f6 27. b4 fxe4 28. fxe4 Kf8g7 29. g4 Re8c8 30. Kg1g2 c6 31. dxc6 Rc8xc6 32. Kg2f2 Kg7h6 33. Kf2g3 g5 34. h4 gxh4 35. Kg3xh4 Kh6g6 36. g5 Re7h7 37. Kh4g3 Kg6xg5 38. e5 Nf6h5 39. Kg3f2 dxe5 40. Re1xe5 Kg5f6 41. Re5e3 Rh7d7 42. Nd2b3 Kf6g7 43. Nb3c5 Rd7d2 44. Re3e2 Rd2xe2 45. Kf2xe2 Nh5f4 46. Ke2f3 Nf4e6 47. Nc3e4 Ne6xc5 48. bxc5 a5 49. Kf3e3 Kg7f7 50. Ne4d6 Kf7e6 51. Nd6xb5 Rc6xc5 52. Nb5c3 Rc5h5 53. Ke3d2 Ke6d6 54. Kd2c2 Kd6c5 55. Kc2b3 Rh5h4 56. Kb3a3 Kc5c4 57. Ka3a4 Rh4h5 58. Ka4a3 Rh5h1 59. Nc3a2 Rh1a1 60. b3 Kc4c5 61. Ka3b2 Ra1h1 62. Kb2a3 Rh1h2 63. Na2c1 Kc5d4 64. b4 axb4 65. Ka3xb4 {This is now a theoretical draw} Rh2b2 66. Kb4a3 Rb2b8 67. Nc1e2 {This loses} Kd4e3 {Kd3! is the only winning move apparently} 68. Ne2c3 Ke3d3 69. Nc3d5 Kd3d4 70. Nd5b4 Kd4c4 71. Nb4c6 {Na2! draws, this and all other moves lose} Rb8b3 {Ra8+! is the only move that wins} 72. Ka3a4 Rb3e3 73. Nc6a5 Kc4c5 1/2-1/2
Edit: A closer look at the Endgame Tablebase output tells me the wins take 30 and 25 moves respectively, so not easy to see.
Windmills + Rook v Knight + The Adams Spot!
23 Jan '15 22:541 edit
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