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Subject: Re: why the hell is Junior9 playing 18...Rae8

Author: Dan Ellwein

Date: 19:04:51 12/17/04

Go up one level in this thread


On December 17, 2004 at 12:11:38, Thorsten Czub wrote:

>[Event "World Computer Chess Championship"]
>[Site "Ramat-Gan"]
>[Date "2004.07.06"]
>[EventDate "2004.??.??"]
>[Round "3"]
>[Result "0-1"]
>[White "Diep"]
>[Black "Deep Junior"]
>[ECO "D20"]
>[WhiteElo "?"]
>[BlackElo "?"]
>[PlyCount "54"]
>
>1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. e5 Nd5 5. Bxc4 Nb6 6. Bd3 Nc6 7. Be3 Nb4 8.
>Be4 f5 9. exf6 exf6 10. a3 f5 11. axb4 fxe4 12. Nc3 Be6 13. Nh3 Qd7 14. Nf4 Be7
>15. Nxe6 Qxe6 16. d5 Qg6 17. O-O O-O 18. Bc5 Rae8 19. Rxa7 Nc4 20. Qe2 Bxc5 21.
>bxc5 Ne5 22. Rxb7 Nf3+ 23. Kh1 Re5 24. Ra1 Rh5 25. h3 Qg4 26. Qf1 Ng5 27. Rxc7
>Nxh3 0-1
>
>
>
>Diep - Deep Junior
>
>[D] r4rk1/ppp1b1pp/1n4q1/2BP4/1P2p3/2N5/1P3PPP/R2Q1RK1 b - - 0 1

CM10_OffSet likes ...Qf7

P3/850

Time	Depth	Score	Positions	Moves
----	----	----	----		----
0:00	1/3	-0.69	1301		1...Bxc5 2.bxc5 Nd7 3.Qd4
0:00	1/4	-0.68	4796		1...Bxc5 2.bxc5 Nd7 3.Qd4 Qf6
0:00	1/5	-0.64	21418		1...Bxc5 2.bxc5 Nd7 3.Qd4 Qf6 4.Qe3
0:01	1/6	-0.59	60430		1...Bxc5 2.bxc5 Nd7 3.Qd4 Qf6 4.Qe3
					a5
0:01	1/6	-0.62	109544		1...Qf7 2.Qb3 a5 3.Bxe7 a4 4.Nxa4
					Qxe7 5.Nxb6 cxb6
0:04	1/7	-0.70	274599		1...Qf7 2.Qd2 Rfd8 3.Rfd1 Bf6 4.Nxe4
					Rxd5
0:06	1/7	-0.73	435147		1...Bxc5 2.bxc5 Nd7 3.Qd4 b6 4.c6
					Nc5 5.Rfe1
0:08	1/8	-0.74	586756		1...Bxc5 2.bxc5 Nd7 3.Qd4 b6 4.c6
					Nc5 5.Qe5 Nb3
0:22	1/9	-0.69	1836808		1...Bxc5 2.bxc5 Nd7 3.Qd4 b6 4.c6
					Nc5 5.Qe5 Nb3 6.Rae1
0:33	1/9	-0.72	2708166		1...Qf7 2.Qb3 Bd6 3.Rae1 Qh5 4.Bxd6
					cxd6 5.Rxe4 Rae8 6.Re6 Rxe6 7.dxe6
0:54	1/9	-0.80	4390267		1...Bd6 2.Re1 Qf7 3.Re2 Rfd8 4.Bxd6
					Rxd6 5.Ra5 c6
1:39	2/10	-0.83	8053123		1...Bd6 2.Re1 Rf5 3.Qb3 Qh6 4.g3
					Bxc5 5.d6+ Kh8 6.bxc5 Rxc5 7.Nxe4
1:59	2/10	-0.87	9587432		1...Qf7 2.Qb3 Bd6 3.Rae1 Rae8 4.Bxb6
					axb6 5.Nxe4 Qf4 6.g3
3:39	2/11	-0.98	18438313	1...Qf7 2.Bxe7 Qxe7 3.Qd4 Rf5 4.Rfe1
					Qe5 5.Rxe4 Qxd4 6.Rxd4 Raf8 7.f3 a6
7:14	2/12	-0.98	37662879	1...Qf7 2.Bxe7 Qxe7 3.Qd4 Rad8
					4.Rfd1 Rf5 5.b5 Qe5 6.Qxe5 Rxe5
					7.Rxa7 Nxd5 8.Rxb7
21:04	3/13	-1.11	113864072	1...Qf7 2.Bxe7 Qxe7 3.Qd4 Rad8
					4.Rfd1 a6 5.Ra5 Rf5 6.Re1 Qf7 7.Rd1
					Qf6 8.Qe3
Dan

>
>Analysis by Junior 9 (AMD2400+, analysis mode, 160 MB hash):
>
>18...Tae8 19.Te1 Df5 20.Sxe4 Sxd5 21.f3 a6 22.Lxe7 Txe7 23.Ta5 Te5 24.Dd4
>²  (0.39)    Tiefe: 17   00:12:36  978346kN
>(, MyTown 17.12.2004)
>
>Cool. it really plays Rae8.
>All my other chess programs play e.g. Bd6.
>
>Even computing on 22.Nf3+ many chess programs do not understand anything.
>E.g. let S8 compute over Nf3 and the following position and you will see that
>this is a difficult position.
>
>Why is Junior9 giving the a-pawn ?
>And why is is not expecting white to take a7.
>Why do other programs eat a7 and do not understand the speculative attack ?



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