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Up Topic The Rybka Lounge / Test Positions / World Championship Girls U12 Round 7 Board 1
- - By irulats (****) [ie] Date 2011-11-24 23:43
This was the position on Board 1 after about 4 hours of play.

8/8/2R5/3N1pk1/8/r5P1/6K1/8 w - - 0 60


Now the little Russian girl Anna Vasenina played 60. Nf4 and after 60... Rxg3+ the game was a draw. All the engines, I've tried show white winning here but won't show the winning line. Is it winable for white? And if so what is the plan to win? 
[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[BlackElo "0"]
[ECO "?"]
[TimeControl "?"]
[WhiteElo "0"]

1. e4 c5 2. Nf3 a6 3. c4 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 e5 7. Nb3 Be6 8. f3
Nbd7 9. Be3 Be7 10. Be2 O-O 11. O-O Rc8 12. Nd5 Bxd5 13. cxd5 Re8 14. Qd2 Rc7
15. Rfc1 Qb8 16. Rxc7 Qxc7 17. Rc1 Qb8 18. Qb4 Bd8 19. Bf1 Bc7 20. g3 h6 21.
Bh3 Rd8 22. Kf1 Re8 23. Ba7 Qxa7 24. Rxc7 Qe3 25. Qc3 Qxc3 26. bxc3 Nb6 27.
Rxb7 Nbxd5 28. exd5 Nxd5 29. Rd7 Nxc3 30. Rxd6 Nxa2 31. Rxa6 Nb4 32. Ra5 g6
33. Nc5 Kg7 34. Ra7 g5 35. Be6 Rf8 36. Bb3 Nc6 37. Rd7 Nd4 38. Bd5 Kg6 39.
Rd6+ Kg7 40. Nd3 Nf5 41. Rd7 Ne3+ 42. Kf2 Nxd5 43. Rxd5 f6 44. Ke3 Ra8 45. Ke4
Kg6 46. Rd6 Ra5 47. Nb4 Ra4 48. Rb6 h5 49. h3 g4 50. hxg4 hxg4 51. f4 exf4 52.
Kxf4 Ra5 53. Kxg4 Rg5+ 54. Kh3 Rh5+ 55. Kg2 Rf5 56. Nd3 Ra5 57. Rc6 Ra3 58.
Nf4+ Kg5 59. Nd5 f5 60. Nf4 Rxg3+ *
Parent - - By Kappatoo (****) [de] Date 2011-11-27 19:47
This is a simple win. The simplest winning plan is this: Attack f5 with rook and knight. Black will have to defend the pawn with rook and king. Then put your king on h3 and take on f5 twice to reach a winning pawn endgame.
I guess the quickest way to win starts with 60. Ne7.
Parent - - By TheHug (Bronze) [us] Date 2011-11-27 20:19
Well this is a pleasant surprise :smile:, I remember you in team matches on the forum. Glad to see you around, lots of things are different around here now since you left.
Parent - - By Kappatoo (****) [de] Date 2011-11-27 20:34
Thanks. I did follow some of the things which went on here recently, especially the WBCCC (I tried to avoid the other stuff). Nice tournament; I am impressed by how many of you managed to hold on to the finish.
Parent - - By TheHug (Bronze) [us] Date 2011-11-28 08:49
Did you have one game that stood out? I think form a human point of view this was probably the best game.

http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=21835

I loved the queen sac in this game.
Parent - - By Kappatoo (****) [de] Date 2011-11-28 16:07
Very tough question. I didn't follow the tournament and the games sufficiently closely to answer it. By the way, was there a brilliancy prize? I think it would be a good idea to award one (in the upcoming tournament).
Parent - By TheHug (Bronze) [us] Date 2011-11-28 16:26
Yes there will be some type of award for next year. I got chesspublishing.com on board to help me look and analysis games by so of there top players.
Parent - - By Uly (Gold) [mx] Date 2011-11-27 20:37
Hey Kappatoo, welcome back! I hope that now that moderation no longer deletes whole threads and free speech is preserved that you stick around!
Parent - - By Kappatoo (****) [de] Date 2011-11-27 20:44
Hi Uly, thanks. It seems that thehug is in charge now, do I have this right? Let's hope for the best then. :smile:
Parent - By TheHug (Bronze) [us] Date 2011-11-27 20:51
You are in good hands friend. :smile:
Parent - - By Uly (Gold) [mx] Date 2011-11-27 21:11
Yes, Jimmy saved Rybka Forum :smile:
Parent - By Kappatoo (****) [de] Date 2011-11-27 22:13
I agree, seriously.
Parent - - By irulats (****) [ie] Date 2011-11-29 08:48
Thank you for that Kappatoo and sorry for the delay in replying. I had to try out your plan against various engines for a few days until I fully understood it. Engines prefer to let white have the pawn so that they can keep the rook and hassle white's king. In this scenario, there is probably some technique to shepherd the pawn up to the queening square. I'll just have to look it up in the endgames manual. At any rate, thanks for the insight. I wish, I could think like that! :smile:

That match was the crunch game, as it turned out, with black going on to win the world championship by half a point and white coming second. One move at the end of a hard slog sealed their fates. That's chess!
Parent - By Kappatoo (****) [de] Date 2011-11-29 15:24
Yes, sure, black can just give up the pawn instead. But then, assisted by rook, knight and king, the white pawn will promote easily. You could try to win such a position against an engine to get a feel for it.

Chess can be cruel. The moment in which white saw the stalemate must have been terrible.
Parent - - By keoki010 (Bronze) [us] Date 2011-11-28 18:13
Kappatoo has it right.  After 60.Ne7

60.Ne7

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[FEN "8/4N3/2R5/5pk1/8/r5P1/6K1/8 b - - 0 60"]
[SetUp "1"]

60... Kh5 61. Rf6 Ra1 62. Rxf5+ Kg4 63. Rf4+ Kg5 64. Nf5 Ra3 65. Kf2 Ra7 66.
Kf3 Kg6 67. Ne3 Ra3 68. g4 Rd3 69. Re4 Kg5 70. Re5+ Kg6 71. Kf4 Rd4+ 72. Re4
Rd2 73. Re6+ Kf7 74. Rc6 Rf2+ 75. Ke4 Rf6 76. Rxf6+ Kxf6 77. Kf4 Kg6 78. Nc4
Kf7 79. g5 Kg6 80. Ne5+ Kg7 81. Kg3 {(0:00:39) 436784kN}
{+4.01|d29|39s|TB:20579}{59...f5}  81... Kh7 82. g6+ Kg7 83. Kf4 Kf6 84. Ke4
Kg7 85. Kf5 Kf8 86. Kf6 Ke8 87. g7 Kd8 88. g8=Q+ Kc7 89. Qb3 Kd6 90. Qc2 Kd5
91. Qc4+ Kd6 92. Qc6# {(0:00:00) 0kN} {+299.89|d1|TB:93}{81.Kg3}  *
Parent - By irulats (****) [ie] Date 2011-11-29 08:48
Thanks for that, keoki010!
Up Topic The Rybka Lounge / Test Positions / World Championship Girls U12 Round 7 Board 1

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