On-line engine blitz tourney May

[Henk]

Looks like last changes were even worse than I thought. Obsessed by nodes per second but for instance Skipper unable to finish KQq endgame.

[Maarten Claessens]

WaDuuttie's greatest achievement this time was the (somewhat lucky) draw against Texel in an endgame with a pawn less. In this position:
[d]8/8/KPb3R1/2k4p/P1r5/8/2B5/8 w - - 1 57
Texel played 57.Rg5+ allowing WaDuuttie to draw. The winning move (I think) was 57.Ka7!

[pgn]
[Event "ICS rated blitz match"]
[Site "winboard.nl"]
[Date "2017.05.20"]
[Round "4"]
[White "Texel"]
[Black "WaDuuttie"]
[Result "1/2-1/2"]
[WhiteElo "2227"]
[BlackElo "2031"]
[PlyCount "230"]
[EventDate "2017.??.??"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 c6 5. Bg5 Be7 6. e3 Nbd7 7. cxd5 exd5 8.
Bd3 O-O 9. Qc2 Re8 10. h3 Nf8 11. O-O g6 12. Bf4 Ne6 13. Be5 b6 14. Ne2 Bb7 15.
Nf4 Nxf4 16. Bxf4 Bd6 17. Bxd6 Qxd6 18. Rac1 Kg7 19. a3 Rec8 20. Qd2 a5 21. Bc2
Rd8 22. Ne5 c5 23. Qd1 Ne4 24. f4 Ba6 25. Re1 f6 26. dxc5 bxc5 27. Bxe4 fxe5
28. fxe5 Qxe5 29. Bf3 Rac8 30. Qd2 d4 31. exd4 Qxd4+ 32. Qxd4+ cxd4 33. Rxc8
Bxc8 34. Re5 d3 35. Kf2 d2 36. Bd1 a4 37. Re4 Kf6 38. Rxa4 Ke5 39. Ke3 Bf5 40.
Ra5+ Ke6 41. b4 Rd3+ 42. Kf2 h5 43. a4 Ra3 44. Ra8 Ke7 45. b5 Be4 46. Ra7+ Kd6
47. b6 Ra1 48. Ke2 Bxg2 49. Kxd2 Ra2+ 50. Kc3 Ra3+ 51. Kb4 Rxh3 52. Rg7 Rh4+
53. Kb5 Bc6+ 54. Ka6 Rd4 55. Bc2 Rc4 56. Rxg6+ Kc5 57. Rg5+ Kd6 58. Bd1 Rd4 59.
a5 Rxd1 60. Ka7 h4 61. Rh5 Ra1 62. a6 Bf3 63. Rxh4 Kd7 64. Rd4+ Kc8 65. Rc4+
Kd7 66. Rd4+ Kc8 67. Rd2 Be4 68. Rb2 Bf3 69. Rf2 Be4 70. Rh2 Kd8 71. Rh6 Kc8
72. Rh5 Kd7 73. Rb5 Kc8 74. Rg5 Kd7 75. Rb5 Kc8 76. Re5 Bf3 77. Rf5 Bg2 78. Rf7
Be4 79. Re7 Bf3 80. Re6 Bg2 81. Re5 Kd7 82. Rf5 Be4 83. Rf4 Bg2 84. Rd4+ Kc8
85. Rd2 Be4 86. Rh2 Bf3 87. Rh6 Bg2 88. Rf6 Be4 89. Rh6 Bg2 90. Rg6 Bf3 91. Rg7
Be4 92. Rg3 Kd7 93. Rg7+ Kc8 94. Rc7+ Kd8 95. Rc4 Bg2 96. Rd4+ Kc8 97. Rf4 Kd8
98. Rf6 Kc8 99. Rf2 Be4 100. b7+ Bxb7 101. Rc2+ Kd7 102. Kxb7 Rb1+ 103. Ka7 Kd8
104. Rc4 Kd7 105. Rc5 Rd1 106. Kb7 Rb1+ 107. Ka8 Rb6 108. a7 Rb1 109. Rc3 Kd8
110. Rc6 Kd7 111. Rc5 Rb3 112. Rc1 Rb2 113. Rc5 Rb3 114. Rc2 Rb1 115. Rc8 Kxc8
1/2-1/2
[/pgn]

[hgm]

Hi hg !
I can't be at my home saturday
Could you run Isa for me ?
Great thanks !
Dany

Pity , hgm didn't read all the posts of the topic it seems ...

It was not logged in when the tourney started. I did join all engines that were logged in.

[petero2]

WaDuuttie's greatest achievement this time was the (somewhat lucky) draw against Texel in an endgame with a pawn less. In this position:
[d]8/8/KPb3R1/2k4p/P1r5/8/2B5/8 w - - 1 57
Texel played 57.Rg5+ allowing WaDuuttie to draw. The winning move (I think) was 57.Ka7!

I also think Ka7 is the move needed to win, but it seems from my analysis that the game did not turn into a draw until 59. a5? was played. Before that move I think it would have been possible to force a repetition of the position at move 57 and then play Ka7 instead of Rg5+.

Anyway, the source of texel's problem seems to be the static evaluation of this position:
[d]8/K2k4/PP6/8/7R/5b2/8/r7 w - - 1 64
Texel thinks this is +3.60 for white, because of the connected passers supported by the king. The correct evaluation is 0 though because there is no way to actually make progress.

[Daniel Anulliero]

Hi hg !
I can't be at my home saturday
Could you run Isa for me ?
Great thanks !
Dany

Pity , hgm didn't read all the posts of the topic it seems ...

It was not logged in when the tourney started. I did join all engines that were logged in.

Ok sorry hgm ..
May be isa was disconnected when the tournament started .
I came back around 00:00 and it was indeed disconnected but I hoped was always co at 21:00
See you next month