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Subject: Re: A startling "quiet" move by Ruffian 2.1.0: d5!!

Author: Madhavan

Date: 21:32:51 01/22/05

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On January 22, 2005 at 13:21:34, George Tsavdaris wrote:

> In the following game between Ruffian 2.1.0 and Abrok 5.0, Ruffian found and
>played an amazing winning move(i can assure you for this) in 35 seconds only,
>that even Shredder 8 fails to find in a reasonable time. 15.d5!! and white wins.
>
>After 15.d5!! Qd6 (15...Qc5 16.dxc6 Nxc6 17.Bb5 Rd8 18.Qf4! +-) 16.dxc6 e6
>(16...Nxc6 17.Qc3! +- another nice move that was actually the game's line)
>17.Rd1! Qc7 18.Qc3 h6 (18...Rg8 19.Bxh7 Rh8 20.Be4 Rxh5 21.Rd7! Nxd7 22.cxd7 +-)
>19.Be4 +-
>There is another better line for black that loses also. It's 15.g6!? which
>offers a tougher resistance(RR versus RBN).
>
FEN: rn2kb1r/p3pppp/1pp5/3P3P/8/q2B1N2/P1PQ1PP1/RR4K1 b - - 0 1

List 512:
   5	00:00	      10.206	0	+0.13	Qd2f4 g7g6 h5h6 Qa3d6 Nf3e5
   6	00:00	      37.583	0	+0.07	Qd2f4 Nb8d7 h5h6 g7xh6 Rb1b3 Qa3d6
   6	00:00	      65.118	0	+0.12	d4d5 Qa3d6 d5xc6 Nb8xc6 Rb1d1 Ra8d8 c2c3
   7	00:00	      89.893	0	 0.00	d4d5 Qa3d6 d5xc6 Nb8xc6 Rb1d1 Ra8d8 Nf3g5 Qd6e5
   7	00:00	     133.225	0	+0.15	Qd2f4 Nb8d7 Bd3e4 Ra8c8 Nf3g5 Nd7f6 Rb1e1
   8	00:00	     256.199	0	-0.06	Qd2f4 Qa3d6 Qf4xd6 e7xd6 Rb1e1+ Bf8e7 c2c4 Nb8d7
Nf3g5 Nd7f6
   8	00:00	     351.424	0	-0.01	d4d5 Qa3d6 d5xc6 Nb8xc6 Rb1d1 Ra8d8 c2c3 e7e6
Nf3g5
   9	00:00	     617.312	0	-0.01	d4d5 Qa3d6 d5xc6 Nb8xc6 Rb1d1 Ra8d8 Qd2e3 Qd6c5
Qe3xc5 b6xc5 Ra1b1
   9	00:01	     815.320	0	+0.13	Qd2f4 Qa3d6 Qf4xd6 e7xd6 Rb1e1+ Bf8e7 Re1e2 a7a5
Ra1e1 Ra8a7 c2c4
  10	00:01	   1.331.999	0	-0.01	Qd2f4 Qa3d6 Qf4xd6 e7xd6 Rb1e1+ Bf8e7 Re1e2 a7a5
Ra1e1 Ra8a7 c2c4 Ke8f8
  10	00:02	   1.956.928	0	+0.07	d4d5 Qa3d6 d5xc6 Nb8xc6 Rb1d1 Ra8d8 Qd2e2 Qd6c7
Nf3g5 Nc6d4 Qe2e3

post your hardware configuration,Ruffian finds in 1.3
List 512 finds the move less than ruffian on your hardware



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