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Subject: Re: arasan2 position number 15

Author: John Merlino

Date: 14:05:05 03/03/04

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On March 03, 2004 at 16:14:05, Uri Blass wrote:
>
>I can add that after f6 Nxc4+ the possibility of Ke1 should be analyzed.

After 1.f6 Nxc4+ 2.Ke1, here is what CM_SKR says on a P4-2.4:

Time	Depth	Score	Positions	Moves
0:00	1/3	1.24	5822		2...Bxf6 3.Qxf6 Rxe4+ 4.Kf2 Qd7
					5.fxe4 gxf6 6.Ne7+ Kf7 7.bxc4
0:00	1/3	0.71	6841		2...Qd7 3.Ne7+ Kh8 4.bxc4 Qxa4
					5.Rxg7
0:00	1/4	0.70	19569		2...Qd7 3.bxc4 Rxa4 4.Ne7+ Rxe7
					5.fxe7 Qxe7
0:00	1/4	0.60	22690		2...Qc7 3.Ne7+ Rxe7 4.fxe7 Be5
					5.e8=Q+ Rxe8
0:00	1/4	0.14	33347		2...Ra7 3.Ne7+ Raxe7 4.fxe7 Be5
					5.Qg4 Bxg3+ 6.Qxg3
0:00	1/5	-0.18	111820		2...Ra7 3.Ne7+ Raxe7 4.fxe7 Be5
					5.Qg4 Bxg3+ 6.Qxg3 Ne5
0:01	1/6	-0.03	261186		2...Ra7 3.Qxh6 Rxe4+ 4.Kd1 Ne3+
					5.Kc1 gxh6 6.Ne7+ Kf7 7.Nxc6
0:08	1/7	-0.37	1498065		2...Ra7 3.fxg7 Bxg7 4.Nh4 Ne5 5.Qf6
					Kh7
0:23	1/8	-0.35	4246915		2...Ra7 3.Ne7+ Raxe7 4.fxe7 Be5
					5.Qg4 Bxg3+ 6.Qxg3 Ne5 7.Nc3 Rxe7
					8.Ke2
0:42	1/9	-0.06	8150463		2...Ra7 3.fxg7 Bxg7 4.Rhg1 Rf7
					5.Qc1 Rxe4+ 6.fxe4 Qxe4+ 7.Kd1
					Qd4+ 8.Ke1 Qf2+ 9.Kd1
2:01	1/10	-0.18	23947725	2...Ra7 3.f7+ Rxf7 4.Qxh6 Rxe4+
					5.Kd1 gxh6 6.Ne5+ Kh7 7.Nxc6 Ne3+
					8.Kd2 Nf5 9.Rg6 Rh4 10.Rxh4 Nxh4
					11.Nxd4 Nxg6 12.hxg6+ Kxg6
5:32	1/11	-0.15	67075003	2...Ra7 3.fxg7 Bxg7 4.Nh4 Ne5 5.Qd2
					d5 6.Qxd5+ Qxd5 7.exd5 b5 8.Nc3
					Nxf3+ 9.Kd1

So, apparently there might be a big question as to how White should respond
after 2...Ra7. The King sees four different possibilities (Ne7+, Qxh6, fxg7 and
f7+), although the scores for all of them slightly favor Black.

Here's the position after 2...Ra7 that probably needs a LOT of analysis:

[D]4r1k1/r5p1/1pqp1PNp/2p4P/N1nbPQ2/1P3PR1/P7/4K2R w - - 0 3

jm



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