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Subject: Re: A Brilliant Move by Rebel Century 4

Author: A.L.Mourik

Date: 09:39:45 02/22/02

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On February 21, 2002 at 22:28:23, Bob Basham wrote:

>On February 21, 2002 at 11:39:23, Sally Weltrop wrote:
>
>>On February 21, 2002 at 11:22:13, Bob Basham wrote:
>>
>>>In the recent win, Rebel played Ra3...!!
>>>This has always been one of my favorite moves when the Rook is brought out to
>>>the third rack, and then moved over to h3,...etc.
>>
>>I show this immediately, it WAS a great move and definitely played a major role
>>in the attack
>>>
>>>[D]r2q1r1k/2n1bppp/1pp1p3/p3P3/PnRPN1Q1/4B3/1P1N1PPP/R5K1 w - -
>>>
>>>This might make a good test move for other engines also..
>>>(i have not tried it yet except on Rebel 10 which is not so bold here and fails
>>>to bring the Rook to a3)...
>
>Hi Sally,
>what program were you using that found this move?
>None of my chess programs so far play Ra3 here!
>Robert

I agree on the opinion that 20.Ra3 is a good move.
Fritz7 agrees to on Ra3 at move 20, but only after a long thinking on depth 14!
Before that it varied between Rcc1, Rd1, Bg5and Nf3.


RebelCentury(C) - van_Wely(GM)
r2q1r1k/2n1bppp/1pp1p3/p3P3/PnRPN1Q1/4B3/1P1N1PPP/R5K1 w - - 0 1

Analysis by Fritz 7(7.0.0.6) on a PII 400Mhz 36M hash:

20.Rcc1 Qd7 21.Bg5 Bxg5 22.Nxg5 h6 23.Nc4
  =  (0.22)   Diepte: 8/25   00:00:00  52kN
20.Rcc1 Qd7 21.Nc4 Ncd5 22.Ra3 Rad8 23.Ned6
  =  (0.16)   Diepte: 9/26   00:00:00  194kN
20.Rd1!
  =  (0.19)   Diepte: 9/26   00:00:01  199kN
20.Rd1 Qd7 21.Nf3 Rad8 22.Bd2
  =  (0.22)   Diepte: 9/26   00:00:01  200kN
20.Rd1 Qd7 21.Nf3 Rad8 22.Bd2 Ncd5 23.Bxb4 Nxb4 24.Rcc1 Nd5 25.Qh5
  =  (0.22)   Diepte: 10/16   00:00:02  220kN
20.Rd1 Qd7 21.Nf3 Rad8 22.Bd2 Ncd5 23.Bxb4 Nxb4 24.Rcc1 Nd5 25.Qh5 Nf4
  =  (0.22)   Diepte: 11/23   00:00:04  383kN
20.Rcc1!
  =  (0.25)   Diepte: 11/30   00:00:07  971kN
20.Bg5!
  ²  (0.28)   Diepte: 11/30   00:00:16  2602kN
20.Bg5 Bxg5 21.Nxg5 Qe7 22.Qh5 h6 23.Nge4 Ncd5 24.Nd6 Rad8 25.Rcc1 Kg8
  ²  (0.38)   Diepte: 11/30   00:00:23  4076kN
20.Bg5 f5 21.exf6 gxf6 22.Bf4 Rg8 23.Qf3 Ncd5 24.Bg3 Qd7 25.Re1 Rad8
  =  (0.25)   Diepte: 12/31   00:00:43  7795kN
20.Bg5 Bxg5 21.Nxg5 f6 22.exf6 gxf6 23.Nxe6 Qd7 24.Re1 Rae8 25.d5 Nbxd5 26.Rce4
  ²  (0.28)   Diepte: 13/34   00:02:23  26379kN
20.Bg5 Bxg5 21.Nxg5 f6 22.exf6 gxf6 23.Nxe6 Qd7 24.Re1 Rae8 25.d5 Nbxd5 26.Rxc6
Rg8
  =  (0.16)   Diepte: 14/33   00:04:08  46986kN
20.Rcc1!
  =  (0.19)   Diepte: 14/37   00:05:37  64475kN
20.Nf3!
  =  (0.22)   Diepte: 14/38   00:15:40  158936kN
20.Ra3!
  =  (0.25)   Diepte: 14/38   00:22:10  232262kN
20.Ra3 Nbd5 21.Bg5 Bxg5 22.Nxg5 f6 23.Nxe6 Nxe6 24.Qxe6 fxe5 25.Qxc6 Nf4
  ²  (0.31)   Diepte: 14/38   00:27:46  294748kN

Bram Mourik, Sommelsdijk 21.02.2002




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