Test Position...

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Harvey Williamson
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Test Position...

Post by Harvey Williamson »

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Nc6 7.O-O Be7 8.c4 Nb4 9.Be2 O-O 10.Nc3 Be6 11.Ne5 c5 12.Nxe4 dxe4 13.d5 Bc8 14.a3 Na6 15.f3 Bd6 16.f4 f6 17.Ng4 Bxg4 18.Bxg4 f5 19.Be2 Nc7 20.Be3 b6 21.g4 Ne8 22.Kh1 a5 23.Qc2 Be7 24.g5 Rf7 25.h4 Bf8 26.b3 Nd6 27.Rab1 g6 28.h5 Bg7 29.Qd2 Qc7 30.Kg2 Re7 31.Rh1 Kf8 32.Rbc1 Ke8 33.Qd1 Rd7 34.Bd2 Kd8 35.Bc3 Kc8 36.Bxg7 Rxg7 37.hxg6 hxg6 38.Qd2 Kb7 39.Qc3 Rag8 40.b4 Ka6 41.Rh4 Nb7 42.Rch1 Ka7 43.Qe5 Qf7 44.Kg3 Qf8 45.b5 Re7 46.Qa1 Qg7 47.Qf6 Rf7 48.Qe5 Re7 49.Qxg7 Rexg7 50.Rh8 Rxh8 51.Rxh8 a4 52.Rf8 Rd7 53.Bd1 Na5 54.Rf6 Rg7 55.d6 Nxc4 56.Bxa4 Rd7 57.Rxg6 Nxd6 58.Kf2 c4 59.Ke1 Kb7 60.Rf6 Rd8 61.Bc2 Kc8 62.a4 Kd7 63.Bd1 Ke7 64.Rh6 Rc8 65.Kd2 Re8 66.Rh7+ Ke6 67.g6 Kf6 68.Rd7 Ke6 69.Rc7

[fen]4r3/2R5/1p1nk1P1/1P3p2/P1p1pP2/8/3K4/3B4 b - - 4 69[/fen]

This position was reached in 1 of my correspondence games. What move do different engines want to play here? I believe there is one move that draws can any engines find it and stick with it as the pv?
RadioSmall
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Re: Test Position...

Post by RadioSmall »

Harvey Williamson wrote:1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Nc6 7.O-O Be7 8.c4 Nb4 9.Be2 O-O 10.Nc3 Be6 11.Ne5 c5 12.Nxe4 dxe4 13.d5 Bc8 14.a3 Na6 15.f3 Bd6 16.f4 f6 17.Ng4 Bxg4 18.Bxg4 f5 19.Be2 Nc7 20.Be3 b6 21.g4 Ne8 22.Kh1 a5 23.Qc2 Be7 24.g5 Rf7 25.h4 Bf8 26.b3 Nd6 27.Rab1 g6 28.h5 Bg7 29.Qd2 Qc7 30.Kg2 Re7 31.Rh1 Kf8 32.Rbc1 Ke8 33.Qd1 Rd7 34.Bd2 Kd8 35.Bc3 Kc8 36.Bxg7 Rxg7 37.hxg6 hxg6 38.Qd2 Kb7 39.Qc3 Rag8 40.b4 Ka6 41.Rh4 Nb7 42.Rch1 Ka7 43.Qe5 Qf7 44.Kg3 Qf8 45.b5 Re7 46.Qa1 Qg7 47.Qf6 Rf7 48.Qe5 Re7 49.Qxg7 Rexg7 50.Rh8 Rxh8 51.Rxh8 a4 52.Rf8 Rd7 53.Bd1 Na5 54.Rf6 Rg7 55.d6 Nxc4 56.Bxa4 Rd7 57.Rxg6 Nxd6 58.Kf2 c4 59.Ke1 Kb7 60.Rf6 Rd8 61.Bc2 Kc8 62.a4 Kd7 63.Bd1 Ke7 64.Rh6 Rc8 65.Kd2 Re8 66.Rh7+ Ke6 67.g6 Kf6 68.Rd7 Ke6 69.Rc7

[fen]4r3/2R5/1p1nk1P1/1P3p2/P1p1pP2/8/3K4/3B4 b - - 4 69[/fen]

This position was reached in 1 of my correspondence games. What move do different engines want to play here? I believe there is one move that draws can any engines find it and stick with it as the pv?
Here is Analysis by Chessmaster Grandmaster Edition up to ply 17 (Core Duo 1.83 Gigahertz) : Looks like the move is 69....Rc8

Time Depth Score Positions Moves
0:00 1/4 0.37 10919 1...e3+ 2.Ke2 Kd5 3.g7 Kd4 4.Re7
0:00 2/7 0.23 121376 1...Rh8 2.g7 Rh2+ 3.Ke1 Rg2 4.Kf1
Rg6 5.Kf2 c3
3:00 7/16 0.67 141743567 1...Rd8 2.Rc6 Rg8 3.Bh5 Rh8 4.Be2
Kd5 5.g7 Rg8 6.Rc7 Kd4 7.Rd7 c3+
8.Kc2 Ke3 9.Rxd6 Kxe2 10.Kxc3 Rxg7
11.Rxb6
8:25 8/17 0.63 381761394 1...Rc8 2.Rc6 Rxc6 3.bxc6 Kf6 4.Bh5
b5 5.a5 b4 6.c7 Kg7 7.Kc2 Kf6 8.a6
Nc8 9.Be2 c3 10.Bh5 Ke6
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Harvey Williamson
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Post by Harvey Williamson »

Rc8 is indeed the move. It is interesting as most 'modern' engines want to play Rd8??

Which loses eg:

69.Rc7 Rd8 70.Rc6 Ke7 71.Ke1 Rg8 72.Bh5 Rh8 73.Rc7+ Kf6 74.Rd7 Ke6 75.Rh7 Rd8 76.Rc7 Rg8 77.Rc6 Rh8 78.Be2 Rh1+ 79.Kf2 Rh2+ 80.Kg3 Rh6 81.Bxc4+ Ke7
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