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Subject: Re: Testposition: hold your horses, avoid 30.Nxg6..

Author: Eelco de Groot

Date: 07:26:21 07/21/05

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It is either a very difficult position or else I'm not assessing it right that
White should not take on g6. What do other programs do?

Pro Deo 1.1 Vulcan {9k9i} holds on to 30.Nxg6 even after two hours now (Athlon
3200+, 200 Mb HT). So taking longer before investing material into positional
advantage would not have helped here.. I was thinking about some switch that
says something like [Think longer about sacrifices = 100] * 200 means take two
times as long than usual about calculating a sacrifice of material, unless that
means a direct loss on time.

Ed, if you read this, how about such a switch, could it work? Just an idea, to
make sacrifices safer. The time invested would not matter much I think, because
in a combination there are often lots of forced moves (recapture moves), and
some of those those could count as "easy" moves to regain any time lost in
calculating the sacrifice.

[D]7r/1kpr1p2/1p4p1/p6n/3pPP1N/3P1K2/PP1R3P/6R1 w - - 2 1

00:00:00.3	0,97	3	1090	Nxg6 fxg6 Rxg6 c6 Re2
00:00:00.3	0,74	4	4976	Nxg6 fxg6 Rxg6 Rf7 f5 Re7
00:00:00.3	0,91	5	12830	Nxg6 fxg6 Rxg6 Rf8 f5 Re7
00:00:00.3	0,67	6	33195	Nxg6 fxg6 Rxg6 c5 Rc2 Rf7 f5 Re7
00:00:00.3	0,71	6	54126	f5 gxf5 Nxf5 c5 Rdg2 b5
00:00:00.4	0,71	7	133764	f5 gxf5 Nxf5 c5 Rdg2 c4 e5 cxd3 Nd6+
00:00:00.4	0,71	7	178762	Nxg6
00:00:00.5	0,86	7	332138	Nxg6 fxg6 Rxg6 c5 f5 Rf7 Re2 b5 b3
00:00:00.7	0,80	8	550469	Nxg6 fxg6 Rxg6 c5 a4 Re8 Rdg2 c4 R6g5 Rh8 dxc4
00:00:01.5	0,76	9	1434364	Nxg6 fxg6 Rxg6 Rd6 Rxd6 cxd6 Rg2 Rh6 f5 Nf6
00:00:03.2	0,85	10	3501100	Nxg6 fxg6 Rxg6 c5 f5 Re7 Re2 c4 dxc4 Rd8 Rd2 a4 Rd3
00:00:09.8	0,82	11	11600671	Nxg6 fxg6 Rxg6 Rf7 f5 Nf6 Kf4 Nd7 Rdg2 Rh4+ R6g4 Rg7
h3 c6
00:00:21.8	0,65	12	26922736	Nxg6 fxg6 Rxg6 Rf7 f5 Nf6 Kf4 Nd7 Rdg2 Rh4+ R6g4 Rg7
h3 Rgh7 e5
00:00:52.9	0,60	13	66914402	Nxg6 fxg6 Rxg6 Rf7 f5 Nf6 Kf4 Nd7 Rdg2 Rh4+ R6g4 Rh3
Rd2 c6 Rg3 Rh4+ Rg4
00:01:52.9	0,40	14	145288917	Nxg6 fxg6 Rxg6 Rf7 f5 Rxf5+ exf5 Kb8 b3
00:04:40.9	0,51	15	361401600	Nxg6 fxg6 Rxg6 Rf7 f5 Nf6 Rdg2 Nd5 Rd2 Nb4 Kg4 Re7
00:07:17.1	0,48	16	571218252	Nxg6 fxg6 Rxg6 Rf7 f5 Ng7
00:21:47.4	0,14	17	1716332426	Nxg6 fxg6 Rxg6 Rf7 f5 Rc8 Kg4
02:08:06.4	0,21	18	1421825252	Nxg6 fxg6 Rxg6 Rf7 f5 Rxf5+ exf5 Ra8 Rdg2

 Eelco



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