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Subject: Re: Question remains: how do you defend against 43.Rc6

Author: Eelco de Groot

Date: 13:22:53 10/19/00

Go up one level in this thread


On October 19, 2000 at 12:19:17, Thorsten Czub wrote:

>>>Uri
>>correction:
>>45...b5 was the move suggested by bruce and the main line of tiger begins with
>>46.Qb4
>>
>>Uri
>
>the main line when playing Rc6 might be with Qb4, but later, when it is to move
>46 it wants to play 46.a6 with +1.45 and if 46...Kc8 47.Rb2
>
>at least on my PII/233 here at work.


Thanks Uri, for correcting that! Of course it should have been 48. ..Qf6-d6.
Sorry!

I like seeing Tiger play 46. a5-a6 very much! It seems more natural than Qb4 or
Qe2 but that is probably just because you would want to prevent Black playing
a7-a6. But after the alternative 46.Qe4-b4 the reply 46. ..a7-a6 does not seem
to work anyway. So the computers are playing b6-b5 and a5-a6 with other purposes
in mind probably than just breaking up or defending the pawn formation. After
46.a5-a6 I get from Q5T output that it wants the king to go hide on a8 not c8,
Thorsten. Does Tiger play 47.Rc2-b2? Then Q5T would play 47. Rd8-b8, evaluation
+0.27 now for Black and it is probably underestimating 46.a5-a6. Very nice move
from Tiger, I think! Thorsten, you did not put 46.a5-a6 in your message below?

 Eelco

Logs:

Rebel Engine for ECTool. (c) Ed Schröder

Engine version   :  REBEL CENTURY 2
Rebel personality :  "Q5T Experimental"
Opening book file :  REBEL.MVS
Hash table size  :  40 MB
Analysis mode   :  Analyzing next move
Refresh interval : 500 ms

Last Move : 46.a6 (Black to play)

00:00  05.00  1.39  46..Rd1 47.Qe2 Rb1 48.Rb2 Rxb2 49.Qxb2
00:01  06.22  1.14  46..Kc8 47.Qb4 Rd1 48.Qxb5 Qg3 49.Qxe5
00:01  07.00  0.97  46..Kc8 47.Rb2 Rd6 48.Qb4 Rdxc6 49.Qf8+ Qd8 50.Qf5+
00:02  08.00  0.23  46..Kc8 47.Rb2 Rd6 48.Qb4 Rd5 49.Qa5 Rxc6 50.Bxa7 Rd1+
00:06  08.17  0.91  46..Ka8 47.Qb4 Rb8 48.Qc5 Qg7 49.Qd6 Qe7 50.Qg6 b4 51.Bc5
00:07  09.00  0.78  46..Ka8 47.Qb4 Rd5 48.Qa5 Qg7 49.Rc5 Rd1 50.Qxb5 Re1
00:15  10.00  0.39  46..Ka8 47.Rb2 Rb8 48.Qb1 e4 49.Qxe4 Qf6 50.Rb4 Re7 51.Qd5
00:32  11.00  0.39  46..Ka8 47.Rb2 Rb8 48.Qd5 b4 49.Qd6 Qe7 50.Bc5 Qxd6 51.Bxd6
Rcc8 52.Bxb8 Rxb8
01:06  12.00  0.19  46..Ka8 47.Rb2 Rb8 48.Qb1 Qf6 49.Rxb5 Rxb5 50.Qxb5 e4
51.fxe4 Qxc6+
03:49  13.00  0.11  46..Ka8 47.Qb4
13:58  14.00  0.33  46..Ka8 47.Rb2 Rb8 48.Qd5 b4 49.Qd6 Qe7 50.Bc5 Qxd6 51.Bxd6
Rxc6 52.Bxb8
14:40  15.00  0.46  46..Ka8 47.Rb2 Qg7

So after long think it likes 47. ..Qg5-g7 but would not play it in a tournament
game:

Last Move : 47.Rb2 (Black to play)

00:00  05.00  0.63  47..Rd1 48.Qe2 Rxg1+ 49.Kxg1 Rxc6 50.Qe4
00:00  06.02  0.36  47..Rb8
00:01  06.02  0.67  47..Rb8 48.Qd5 b4 49.Qc5 Qg6 50.Rxb4 Rxb4
00:02  07.00  0.93  47..Rb8 48.Qb1 e4 49.Qxe4 Re7 50.Qb4 Rbe8 51.Qxb5
00:04  08.00  0.94  47..Rb8 48.Qb1 Qe7 49.Rxb5 Rxb5 50.Qxb5 Qe8 51.Bf2+ Qxc6
52.Qxe5
00:10  09.00  0.41  47..Rb8 48.Qd5 b4 49.Qd6 Qe7 50.Bc5 Qxd6 51.Bxd6 Rcc8
00:28  10.00  0.23  47..Rb8 48.Qb1 Qh5 49.Rxb5 Rxb5 50.Qxb5 Qe8 51.Qc5 Qxc6
52.Qxe5 Qc1 53.Qh8+ Rc8
01:35  11.00  0.36  47..Rb8 48.Qd5
03:43  12.00  0.32  47..Rb8 48.Qd5 b4 49.Qd6 Qe7 50.Bc5 Qxd6 51.Bxd6 Rxc6
11:51  13.00  0.27  47..Rb8 48.Rd2 Re8






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