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Subject: Re: Evaluation testposition

Author: Dann Corbit

Date: 12:24:47 03/20/02

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On March 20, 2002 at 15:14:51, Dan Andersson wrote:

>>[D]4r1k1/pp2q1p1/2p1P1Q1/3p4/6R1/P7/KPP5/8 w - - 0 17
>>
>>I get a static eval of +3.7 here, which drops a little
>>bit after searching a minute or so (to +3.2).
>>
>A bit tangential maybe. But to me (naked brain) the obvious line to try for a
>win for white is:
>1. Rh4 Qxe6 2. Qh7+ Kf8 3. Rf4+ Ke7 4. Qxg7+ Kd8 5. Qxb7 Qd7 The only non forced
>move for black. But I can't find a better one 6. Qxd7+ Kxd7 7. Rf7+ Re7 8. Rxe7+
>Kxe7 And it looks bad for black after 9. Kb3 since he has two weaknesses. Any
>thoughts?

My gut feelings about the position were probably wrong, as white has a lot more
compensation from the position than I imagined (and will get the material back
too).  Here is what ChessMaster 8000 says:

Time	Depth	Score	Positions	Moves
0:00	2/6	0.45	38801		1. Rh4 Qxe6 2. Qh7+ Kf7 3. Rf4+
					Ke7 4. Qxg7+ Kd8 5. Qxb7 Qd7 6.
					Qb8+ Ke7
0:00	3/7	0.36	116213		1. Rh4 Qxe6 2. Qh7+ Kf7 3. Rf4+
					Ke7 4. Qxg7+ Kd8 5. Qxb7 Qd7 6.
					Qb8+ Ke7 7. Qe5+ Kd8
0:02	4/8	0.18	468025		1. Rh4 Qxe6 2. Qh7+ Kf7 3. Rf4+
					Ke7 4. Qxg7+ Kd8 5. Qxb7 Qd7 6.
					Qxd7+ Kxd7 7. Ra4 Ra8 8. Ra6 Kd6
0:11	5/9	0.23	2027272		1. Rh4 Qxe6 2. Qh7+ Kf7 3. Rf4+
					Ke7 4. Qxg7+ Kd8 5. Qxb7 Qd7 6.
					Qxd7+ Kxd7 7. Ra4 Ra8 8. Ra6 Kd6
					9. Kb3
0:46	6/10	0.18	8305661		1. Rh4 Qxe6 2. Qh7+ Kf7 3. Rf4+
					Ke7 4. Qxg7+ Kd8 5. Qxb7 Qd7 6.
					Qxd7+ Kxd7 7. Ra4 Ra8 8. Ra6 Kd6
					9. b4 d4
2:57	7/11	0.34	32042371	1. Rh4 Qxe6 2. Qh7+ Kf7 3. Rf4+
					Ke7 4. Qxg7+ Kd8 5. Qxb7 Qd7 6.
					Qb8+ Ke7 7. Qb4+ Kd8 8. Rf6 Kc7
					9. Qc5 Kb7 10. b4
13:02	8/12	0.27	138613656	1. Rh4 Qxe6 2. Qh7+ Kf7 3. Rf4+
					Ke7 4. Qxg7+ Kd8 5. Qxb7 Qd7 6.
					Qb8+ Ke7 7. Qb4+ Kd8 8. Rf6 Kc8
					9. Qf4 Qc7 10. Qf5+ Kb7 11. Qf2

CM:
1. Rh4 Qxe6 2. Qh7+ Kf7
Your line:
1. Rh4 Qxe6 2. Qh7+ Kf8



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