Author: Rob Basham
Date: 13:53:08 03/05/05
Go up one level in this thread
On March 05, 2005 at 13:27:07, John Merlino wrote:
>On March 05, 2005 at 12:19:53, Rob Basham wrote:
>
>>[D]r1bqr3/pp1k2pp/3b1n2/4R1Bn/2Q1P3/P1N5/1PP2PPP/1B1R2K1 w - - 0 1
>>
>>Fritz 8 takes about 58 seconds to find..
>>Rxd6+...!
>>
>>This move mates in about 23 moves..not sure...:-)
>>
>>If any program announces mate at move one, that would be exciting too...
>>
>>rob
>
>CMX Yoda v25 finds Rxd6+ in two seconds on a P4-2.4, but there is no mate
>announcement after more than 10 minutes.
>
>After forcing:
>
>1.Rxd6+ Kxd6 2.Qc5+ Kd7 3.Rd5+ Ke6 {Nxd5 leads to a mate in no more than twelve
>moves} 4.Rxd8 Ke7 {the only move that does not lead to a quick mate}
>
>...things get a bit fuzzy. There are four potential best moves here: Rxc8, Bxf6,
>Ba2+ and Rxe8 -- all of which lead to very high scores.
>
>[D]r1bRr3/pp3kpp/5n2/2Q3Bn/4P3/P1N5/1PP2PPP/1B4K1 w - - 0 5
>
>So, it took a little while, almost 20 minutes, but we (Yoda and I :-) finally
>got this:
>
>Time Depth Score Positions Moves
>0:00 1/5 14.57 25939 5.Ba2+ Be6 6.Bxf6 Raxd8 7.Bxd8
> Bxa2 8.Qxh5+ Kf8
>0:00 1/6 14.67 96330 5.Ba2+ Be6 6.Bxf6 Raxd8 7.Bxd8
> Bxa2 8.Qxh5+ Kf8 9.Bc7
>0:01 1/7 14.91 280990 5.Ba2+ Be6 6.Bxf6 Raxd8 7.Bxe6+
> Rxe6 8.Bxd8 Nf4 9.Qxa7
>0:03 1/8 14.87 845889 5.Ba2+ Be6 6.Bxf6 Raxd8 7.Bxe6+
> Kxe6 8.Qf5+ Kf7 9.Bxd8+ Kg8 10.Bg5
> g6
>0:05 1/8 15.05 1182525 5.Bxf6 Nxf6 6.Ba2+ Kg6 7.Rxe8 Nxe8
> 8.Qe7 Nf6 9.Bf7+ Kh6 10.Qe5 Bf5
> 11.Qxf5
>0:07 1/9 16.46 1865439 5.Bxf6 Nxf6 6.Ba2+ Kg6 7.Rxe8 Nxe8
> 8.h4 h6 9.h5+ Kh7 10.Qf8 Nf6 11.Bf7
> Bf5 12.Qxa8
>0:16 1/9 17.16 4054262 5.Rxc8 Kg8 6.Rxa8 Rxa8 7.e5 Re8
> 8.Bd2 b6 9.Qd4 Re6 10.exf6 Nxf6
>0:19 1/10 17.58 4988993 5.Rxc8 Kg8 6.Rxa8 Rxa8 7.e5 Re8
> 8.Be3 a6 9.g4 Kh8 10.gxh5
>0:43 1/11 18.55 11578240 5.Rxc8 Kg8 6.Rxa8 Rxa8 7.e5 Re8
> 8.Ba2+ Kh8 9.Bf7 Ra8 10.Qd6 h6
> 11.exf6 hxg5 12.Bxh5
>1:41 2/12 18.86 28921154 5.Rxc8 Kg8 6.Rxa8 Rxa8 7.e5 Kh8
> 8.exf6 gxf6 9.Bxf6+ Nxf6 10.Qe5
> Rf8 11.Qe7 Nd7 12.Qxd7 b6 13.Qxa7
>5:25 2/12 26.08 96936342 5.Rxe8 Kxe8 6.Ba2 Nf4 7.Bxf4 Be6
> 8.Bxe6 Rd8 9.Qc7 Rd7 10.Bxd7+ Nxd7
> 11.Bd6 g5 12.Qc8+ Kf7 13.Qxd7+
> Kg6 14.Qxb7
>19:48 2/13 Mate12 381094649 5.Rxe8 Kxe8 6.Ba2 Bg4 7.Nd5 Nxd5
> 8.Qxd5 Nf6 9.Qf7+ Kd8 10.Qxg7 Kc8
> 11.Qxf6 Kd7 12.Qe7+ Kc6 13.Bd5+
> Kb6 14.Qxb7+ Ka5 15.Qb4+ Ka6 16.Bc4#
>
>So, I have determined that Rxd6 leads to a mate in no more than 16 moves.
>
>jm
Thanks John...
Mate in 16 looks good......even better than what I had
calculated...
regards
Rob
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