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Subject: Re: Variation that casts some doubts on the line?!

Author: John Merlino

Date: 11:48:55 03/20/04

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On March 20, 2004 at 07:07:01, Dan Andersson wrote:

> Here is one line that comes from my organic computer. It questions the relative
>values of the moves 1. Nxh7 and 1. Nh5+.
> 1. Nh5+ Kh8 2. Qh6 Rg8 3. Nf6 Rg7 4. Rf3 it carries enormous threats to the
>black king. Is there a way to save the variation?
>
>MvH Dan Andersson

This is the line that CM_SKR showed that gave the most convincing score of all
posts in this thread (more than +3 for White).

All of Black's moves are forced up to 4.Rf3. Here's the position after 4.Rf3:

[D]3r3k/pb3prp/1pn2NpQ/2p1PP2/8/b2B1R2/qP4PP/3R3K b - - 0 4

Here's what CM_SKR on a P4-2.4 shows at this move -- a VERY convincing score!

Time	Depth	Score	Positions	Moves
0:00	1/3	-5.67	3697		4...Qb3 5.Re1 Rxd3 6.Rxd3 Qxd3
					7.bxa3 Qxf5
0:00	1/4	-6.11	16259		4...Qb3 5.Rd2 Nxe5 6.Rh3
0:02	1/5	-2.58	376477		4...Qb3 5.Rd2 Nxe5 6.Bf1 Rxd2 7.Rxb3
					Bxg2+ 8.Bxg2 Rd1+ 9.Bf1 Rxf1+ 10.Kg2
0:02	1/6	0.00	464163		4...Qb3 5.Rd2 Qa2 6.Rd1
0:07	1/7	2.88	1201212		4...Qb3 5.Rdf1 Nxe5 6.Rh3 Bxg2+
					7.Kxg2 gxf5+ 8.Kh1 Qd5+ 9.Nxd5
					Rxd5 10.Rg1
0:11	1/8	2.88	2010883		4...Qb3 5.Rdf1 Qxd3 6.Rxd3 Rxd3
					7.Nxh7 Rh3 8.Qxh3 Rxh7 9.Qxa3 Nxe5
					10.fxg6 fxg6 11.Qxa7
0:36	1/9	6.56	6749028		4...Qb3 5.Rd2 Nxe5 6.Rh3 Bxg2+
					7.Kxg2 Qd5+ 8.Nxd5 gxf5+ 9.Rg3
					Ng4 10.Qc6 Rg6 11.Qc7 Rxd5 12.bxa3
1:22	1/10	7.07	14953398	4...Qb3 5.Rd2 Nxe5 6.Rh3 Bxg2+
					7.Kxg2 Qd5+ 8.Nxd5 Ng4 9.Qf4 Rxd5
					10.fxg6 Ne5 11.bxa3 fxg6 12.Qf8+
					Rg8
1:59	1/10	6.99	22409400	4...Nxe5 5.Rh3 Bxg2+ 6.Kxg2 Qd5+
					7.Nxd5 gxf5+ 8.Kf1 Rxd5 9.bxa3
					c4 10.Be2 Rxd1+ 11.Bxd1 Nd3 12.Qf6
2:27	1/11	7.42	28786673	4...Nxe5 5.Rh3 Bxg2+ 6.Kxg2 Qd5+
					7.Nxd5 gxf5+ 8.Kf1 Rxd5 9.bxa3
					Ng4 10.Qf4 Rg6 11.Be2 Rxd1+ 12.Bxd1
					Kg8 13.Qxf5

So it is clear that Nh5+ wins for White.

jm



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