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Subject: Re: White's Best Move...?

Author: chandler yergin

Date: 06:05:39 04/11/05

On April 11, 2005 at 05:41:59, pavel wrote:

>On April 10, 2005 at 20:52:17, John Merlino wrote:
>
>>On April 10, 2005 at 19:55:40, Rob Basham wrote:
>>
>>>[D]2r1r2k/4R1pp/pb6/1p6/2nqN1QB/P5PP/1PB4K/5R2 w - - 0 1
>>>
>>>
>>>White mates in about 9 or 14...
>>>
>>>Best move is..
>>>
>>>Qf5, Bf6, or Rxe8+.....?
>>>
>>>Thanks
>>>
>>>Rob
>>>
>>>Thanks to John Merlino for your help on these test diagrams...:-)
>>
>>It takes exactly one minute for CMX Yoda v25 on a P4-2.4 to announce Mate in 9
>>with Bf6:
>>
>>Time	Depth	Score	Positions	Moves
>>0:00	1/3	10.52	4465		1.Bf6 Rxe7 2.Bxd4 Rd8
>>0:00	1/4	10.39	9920		1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qf3
>>0:00	1/5	10.54	51151		1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qg5 Red7
>>0:00	1/5	12.04	189663		1.Qf5 Qe5 2.Rxe5 Nxe5 3.Nd6 Rxc2+
>>					4.Qxc2
>>0:01	1/6	13.31	312119		1.Qf5 Qe5 2.Rxe5 Nxe5 3.Nd6 Rxc2+
>>					4.Qxc2 Rb8 5.Qe4 Ng6
>>0:03	1/7	14.55	858973		1.Qf5 Qd5 2.Rxe8+ Rxe8 3.Qxd5 Ne3
>>					4.Qf7 Nxf1+ 5.Qxf1 Bd4 6.Qf7
>>0:11	1/8	16.40	2967418		1.Qf5 Qe5 2.Rxe5 Nxe5 3.Nd6 Rxc2+
>>					4.Qxc2 Rb8 5.Nc8 Ng6 6.Nxb6 Nxh4
>>					7.gxh4
>>0:30	1/9	17.20	8063147		1.Qf5 Qe5 2.Rxe5 Nxe5 3.Nd6 Rxc2+
>>					4.Qxc2 Rg8 5.Qf5 Bc5 6.Qxe5 Bxd6
>>					7.Qxd6 a5
>>1:00	1/9	Mate09	16434288	1.Bf6 Rxe7 2.Bxd4 Rg8 3.Ng5 Ne5
>>					4.Qe4 Ng6 5.Qxe7 h6 6.Nf7+ Kh7
>>					7.Bxg6+ Kxg6 8.Qe4+ Kh5 9.Qg4#
>>1:04	1/10	Mate09	17702274	1.Bf6 Rxe7 2.Bxd4 Rg8 3.Ng5 Ne3
>>					4.Qe4 Nxf1+ 5.Kg2 Ne3+ 6.Bxe3 g6
>>					7.Qxe7 Rg7 8.Qf8+ Rg8 9.Nf7#
>>1:34	1/11	Mate09	27485404	1.Bf6 Rxe7 2.Bxd4 Rg8 3.Ng5 Ne3
>>					4.Qe4 Nxf1+ 5.Kg2 Ne3+ 6.Bxe3 g6
>>					7.Qxe7 Rg7 8.Qf8+ Rg8 9.Nf7#
>>
>>It appears that both Rxe8+ and Qf5 are Mates in about 15 moves.
>>
>>jm
>
>
>Only Junior finds this mate faster.

For comparison, here's Shredder
Finds Mate
Depth: 15/36   00:00:43  15751kN
Now that's fast..




New game,
[D]2r1r2k/4R1pp/pb6/1p6/2nqN1QB/P5PP/1PB4K/5R2 w - - 0 1

Analysis by Shredder 8:

1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bc3 Be3
  +-  (9.95)   Depth: 5/16   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5
  +-  (9.95)   Depth: 6/19   00:00:00
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 5.Kg2
  +-  (10.04)   Depth: 7/18   00:00:00  59kN
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 5.Qg5 Re5
  +-  (10.13)   Depth: 8/20   00:00:00  130kN
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Nf6 Nd2 4.Rf5 Re2+ 5.Rf2 Nf1+ 6.Kg2 Rxf2+ 7.Kxf2 Ne3
  +-  (10.20)   Depth: 9/20   00:00:01  259kN
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.Nd6 Na4 5.Nxe8 Rxe8
  +-  (10.45)   Depth: 10/26   00:00:01  488kN
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.Nd6 Re2+ 5.Kg1 Nd5 6.Nxe8 Rg2+ 7.Kxg2 Nf4+
8.gxf4
  +-  (10.95)   Depth: 10/26   00:00:01  527kN
1.Bf6 Rxe7 2.Bxd4 Ra8 3.Qh4 Re6 4.Nc3 h6 5.Bxg7+ Kg8 6.Bxh6 Nxb2 7.Qg4+ Rg6
8.Bxg6
  +-  (15.46)   Depth: 10/34   00:00:04  1467kN
1.Bf6 Rxe7 2.Bxd4 Rg8 3.Bxb6 Nxb6 4.Nd6 h6 5.Qg6 Nc4 6.Nf7+ Rxf7 7.Qh7#
  +-  (15.70)   Depth: 11/32   00:00:07  2343kN
1.Bf6 Rxe7 2.Bxd4 Rg8 3.Ng5 Ne3 4.Bxe3 Bc7 5.Nf7+ Rxf7 6.Rxf7
  +-  (15.95)   Depth: 12/41   00:00:14  4606kN
1.Bf6 Rxe7 2.Bxd4 Rg8 3.Ng5 Ne3 4.Bxe3 Bc7 5.Nf7+ Rxf7 6.Rxf7 Be5
  +-  (16.45)   Depth: 12/41   00:00:14  4749kN
1.Bf6 Qxf6 2.Nxf6 Bg1+ 3.Kxg1 Rg8 4.Nxg8 Nxb2 5.Qxg7#
  +-  (#152)   Depth: 12/42   00:00:22  7641kN
1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qh4 Ree8 4.Nc3 Re2+ 5.Nxe2 h6 6.Kh1 Rxd4 7.Rf8#
  +-  (#152)   Depth: 13/18   00:00:23  7840kN
1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qh4 Bxd4 4.Qxe7 Rg8 5.Rf8 Bg1+ 6.Kxg1 Nd6 7.Qxd6 b4
8.Rxg8+ Kxg8 9.Qd8+ Kf7
  +-  (#150)   Depth: 14/40   00:00:43  15586kN
1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qh4 Bxd4 4.Qxe7 Rg8 5.Rf8 Bc5 6.Nxc5 Nd6 7.Qxd6 b4
8.Rxg8+ Kxg8 9.Qe6+ Kf8 10.Nd7#
  +-  (#150)   Depth: 15/36   00:00:43  15751kN
1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qh4 h5 4.Qxe7 Ne5 5.Qxe5 Bxd4 6.Qxh5+ Kg8 7.Bb3+ Rd5
8.Bxd5#
  +-  (#150)   Depth: 16/38   00:00:47  17089kN
1.Bf6 Rxe7 2.Bxd4 Rce8 3.Qf5 Kg8 4.Ng5 g6 5.Qd5+ Re6 6.Rf8+ Kxf8 7.Qf3+ Ke7
8.Qb7+ Bc7 9.Qxc7+ Kf8 10.Qg7#
  +-  (#150)   Depth: 17/36   00:00:49  17858kN

(,  11.04.2005)

Re: White's Best Move...? John Merlino 09:24:18 04/11/05
- Re: White's Best Move...? Rob Basham 10:00:10 04/11/05
  - Re: White's Best Move...? chandler yergin 20:36:27 04/11/05
    - Re: White's Best Move...? John Merlino 21:23:30 04/11/05
      - Re: White's Best Move...? Follow the depth of search chandler yergin 02:15:43 04/12/05
        
        Re: White's Best Move...? Follow the depth of search John Merlino 08:54:35 04/12/05
        
        Re: White's Best Move...? Follow the depth of search chandler yergin 12:20:35 04/12/05
        
        Re: White's Best Move...? Follow the depth of search John Merlino 15:13:59 04/12/05
        
        Re: White's Best Move...? Follow the depth of search chandler yergin 17:44:38 04/12/05
        
        Re: White's Best Move...? Follow the depth of search John Merlino 18:56:10 04/12/05
        
        Re: White's Best Move...? Follow the depth of search chandler yergin 19:33:07 04/12/05
        
        Re: White's Best Move...? Follow the depth of search John Merlino 19:57:09 04/12/05
        
        Re: White's Best Move...? Follow the depth of search Uri Blass 12:16:59 04/12/05

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