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Subject: Re: Hard Test Position ? (tactical)

Author: John Merlino

Date: 12:56:03 04/11/02

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On April 11, 2002 at 10:09:42, Eduard Nemeth wrote:

>Twic 387,
>First the game:
>
>[Event "TCh-NOR Qualifier "]
>[Site "?"]
>[Date "2002.??.??"]
>[Round "2"]
>[White "Royset,P"]
>[Black "Bjornstad,Leif"]
>[WhiteElo "2280"]
>[ECO "B52"]
>[Result "1-0"]
>1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. O-O Ngf6
>6. Qe2 Qc7 7. b3 g6 8. Bb2 Bg7 9. c4 O-O 10. Nc3 Rfe8
>11. d4 cxd4 12. Nxd4 a6 13. Rad1 Rac8 14. Rd3 Nh5 15. Nd5
>Qb8 16. Nf5 Bf8 17. Qxh5 1-0
>
>
>[D]1qr1r1k1/1p1nppbp/p2p2p1/3N3n/2PNP3/1P1R4/PB2QPPP/5RK1 w - -
>
>After  16...gxf5 17.Qxh5 Bxb2 18.Rg3+ Kh8 19.Rh3 Nf8 20.Qxf7 +-
>and white is clearly better in position!
>
>
>which program plays 15. Nf5!
>
>Eduard

It takes Chessmaster a while (on a PIII-600), but it eventually sees it:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.00	3140		1.Rc1 e6 2.Ne3 Nf4
0:00	1/3	0.04	3731		1.Re1 e6 2.Nb4 Nf4
0:00	1/3	0.16	4246		1.Rfd1 e6 2.Qg4 exd5 3.Qxd7 dxe4
0:00	1/3	0.27	5615		1.Qd2 e6 2.Nf4
0:00	1/3	0.34	6267		1.f4 e6 2.Ne3 Nhf6
0:00	1/3	0.85	9152		1.Ba3 e6 2.Qg4 Nhf6
0:00	1/3	1.17	10218		1.Nf3 Nc5 2.Rd2
0:00	1/4	0.71	15665		1.Nf3 Bxb2 2.Qxb2 e6 3.Ne3 Nhf6
0:00	2/5	0.43	26870		1.Nf3 e6 2.Bxg7 exd5 3.Bb2 dxe4
0:01	2/6	0.49	61260		1.Nf3 e6 2.Bxg7 exd5 3.Ba1 dxe4
					4.Qb2
0:03	3/7	-0.26	201535		1.Nf3 e6 2.Bxg7 exd5 3.Ba1 dxe4
					4.Qb2 Ne5
0:06	3/7	0.32	408304		1.g4 Nhf6 2.Nxf6+ Nxf6 3.f4 e5
					4.fxe5 Rxe5
0:08	3/7	0.35	507859		1.Rd2 e6 2.Nb4 Qc7 3.Nd3 Qa5 4.Nf3
					Bxb2 5.Rxb2
0:12	3/8	0.37	739540		1.Rd2 e6 2.Nb4 Qc7 3.Nd3 Nc5 4.f4
					Nf6
0:25	3/8	0.49	1596417		1.Rdd1 e6 2.Nb4 Qc7 3.Nf3 Bxb2
					4.Qxb2 Ne5 5.Nxe5 dxe5
0:33	4/9	0.44	2085781		1.Rdd1 e6 2.Nb4 Nc5 3.Qf3 Qc7 4.Rfe1
					Qb6 5.Nbc2 Nf6
1:34	4/10	0.50	5944695		1.Rdd1 e6 2.Nc3 Qc7 3.Qd2 Qa5 4.Nf3
					Rc6 5.Rfe1 h6
4:38	5/11	0.43	19046185	1.Rdd1 e6 2.Nc3 Qc7 3.Qd2 Qa5 4.Rfe1
					Red8 5.Nde2 Rc6 6.a3
9:30	5/11	0.61	42706137	1.Nf5 gxf5 2.Qxh5 Bxb2 3.Rg3+ Kh8
					4.Qxf7 fxe4 5.Nxe7 Rxe7 6.Qxe7
					Nc5 7.Qf7 Nd3 8.Rd1

jm



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