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Subject: Re: Test position

Author: John Merlino

Date: 10:30:25 09/23/04

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On September 23, 2004 at 13:01:20, Mihaly Szalai wrote:

>From the game Gajewski - Bartel, 2002.
>
>[D]r4rk1/1pN3p1/2b1p1p1/p3p3/7q/P3B3/1PP3P1/R2QR1K1 b - - 0 1
>
>1... Rf3!! 2. Re2 (2. gxf3 Qg3+ 3. Kf1 Rf8 -+) (2. Nxa8 Rh3!! 3. Kf1 (3.
>Qd8+ Qxd8 4. gxh3 Qd5!) 3... Bb5+ 4. Qd3 (4. Re2 Rh1+ 5. Bg1 Qf4+ 6. Ke1
>Rxg1#) 4... Bxd3+ 5. cxd3 Rxe3 6. Rxe3 Qh1+ -+) (2. Qd6!? Rd8! 3. Qxe5 (3. Qxe6+
>Kh7 4. Re2 Rg3 5. Qxe5 Qh3 6. Qxg3 Qxg3) 3... Rf5 4. Qh2 Rd2!! 5. Qxh4 (5. Bxd2
>Qf2+ 6. Kh1
>Bxg2+!) 5... Rxg2+ 6. Kh1 Rxc2+ 7. Kg1 Rg2+ 8. Kh1 Rxb2+ 9. Kg1 Rg2+ 10. Kh1
>Rg4+ 11. Kh2 Rxh4+ 12. Kg3 Rc4 13. Rf1 Rc3 14. Rxf5 gxf5 -+) 2... Rh3 3. gxh3
>(3. Kf1 Rh1+ 4. Bg1 Rf8+ -+) 3... Qg3+ 4. Kf1 Qxh3+ 5. Kf2 Rf8+ 6. Ke1 Qf1+ 7.
>Kd2 Rd8+ 8. Kc3 Rxd1 0-1
>
>Junior found it in reasonable time.

CM9_SKR spent a lot of time, starting at depth 9, looking at Rf3. But it needed
until depth 12 to find it, after 3:22 on an AMD 2500:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.61	1810		1...Rad8 2.Qe2 Rd7 3.Nxe6
0:00	1/4	0.59	7556		1...Rad8 2.Qe2 Rf5 3.Bf2
0:00	1/5	0.98	31547		1...Rad8 2.Qe2 Rf6 3.Bf2 Qg5
0:00	1/5	0.70	38851		1...Rac8 2.Nxe6 Rf6 3.Nc5 b6
0:00	1/6	0.35	129373		1...Rac8 2.Nxe6 Rf5 3.Ng5 Rxg5
					4.Bxg5 Qxg5 5.Qe2 e4
0:01	1/7	0.32	317285		1...Rac8 2.Nxe6 Rf5 3.Ng5 Rxg5
					4.Bxg5 Qxg5 5.Qe2 Rf8 6.Qc4+ Rf7
0:02	1/8	0.00	742213		1...Rac8 2.Nxe6 Rf5 3.Ng5 Bxg2
					4.Kxg2 Rxg5+ 5.Bxg5 Qxg5+ 6.Kh2
					Qh4+ 7.Kg1 Qg3+ 8.Kh1 Qh3+ 9.Kg1
					Qg3+
0:06	1/9	0.00	1712447		1...Rac8 2.Nxe6 Rf5 3.Ng5 Bxg2
					4.Kxg2 Rxg5+ 5.Bxg5 Qxg5+ 6.Kh2
					Qh4+ 7.Kg1 Qg3+ 8.Kh1 Qh3+ 9.Kg1
					Qg3+
0:16	1/10	0.00	4850101		1...Rac8 2.Nxe6 Rf5 3.Ng5 Bxg2
					4.Kxg2 Rxg5+ 5.Bxg5 Qxg5+ 6.Kh2
					Qh4+ 7.Kg1 Qg3+ 8.Kh1 Qh3+ 9.Kg1
					Qg3+
0:45	1/11	0.00	13854729	1...Rac8 2.Nxe6 Rf5 3.Ng5 Bxg2
					4.Kxg2 Rxg5+ 5.Bxg5 Qxg5+ 6.Kh2
					Qh4+ 7.Kg1 Qg3+ 8.Kh1 Qh3+ 9.Kg1
					Qg3+
2:05	1/12	0.00	38892922	1...Rac8 2.Nxe6 Rf5 3.Ng5 Bxg2
					4.Kxg2 Rxg5+ 5.Bxg5 Qxg5+ 6.Kh2
					Qh4+ 7.Kg1 Qg3+ 8.Kh1 Qh3+ 9.Kg1
					Qg3+
3:22	1/12	-0.61	61459855	1...Rf3 2.Qd6 Rd8 3.Qxe5 Rf5 4.Qh2
					Rd2 5.Qxh4 Rxg2+ 6.Kh1 Rxc2+ 7.Kg1
					Rg2+ 8.Kh1 Rxb2+ 9.Kg1 Rg2+ 10.Kh1
					Rg4+ 11.Kh2 Rxh4+ 12.Kg3

jm



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