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Subject: Re: Testposition - The Arrow's Point

Author: John Merlino

Date: 14:21:26 03/06/01

Go up one level in this thread


On March 06, 2001 at 06:55:28, Sune Larsson wrote:

>
>  [D]k4B1b/p6P/Kp6/1P3P2/4P3/R2P4/2P2p2/6n1 w - - 0 1
>
>  Larsen,P 1932
>
>  The name of the author sure gives associations... But it's a common name
>  and the initial + year tells us that it couldn't be this Larsen nor that
>  Larsen...;) This one carries an indian theme. White has a nice and sharp
>  arrow, formed by the pawns c2,d3,e4,f5,h7. On the other hand he's facing
>  defeat since the black f2 pawn is about to promote. Looks like there is
>  no decent way to stop this runner. But the arrow carries some poison and
>  with an intriguing manouvre white is aiming for peace. And succeeds...
>
>
>  Test: White moves for the draw. Fire off your arrow and show us your
>        peace evals! The smoke signals are further down. ;)
>
>
>   Sune
>
>
>
>
>
>
>
>
>
> Larsen,P
> 1932
>
> 1.Ra1! Bxa1 2.c3! Bxc3 3.d4! Bxd4 4.e5! Bxe5 5.f6! Bxf6 6.Bg7 Bxg7 7.h8Q+ Bxh8
> ½-½

CM8000 finds the right move in 4:34 on a P3-600, but it doesn't see the draw
even after 25 minutes:

Time	Depth	Score	Positions	Moves
0:00	3/6	-0.91	14208		1. f6 f1=Q 2. Bg7 Qh3 3. Rc3 Qd7
0:00	4/7	-3.25	35046		1. Ra1 Bxa1 2. c3 Bxc3 3. d4 Bxd4
					4. e5 f1=Q 5. h8=Q Qxf5
0:01	4/7	-2.07	74982		1. c4 f1=Q 2. c5 Qh3 3. cxb6 Qxh7
					4. Bc5 Qb7+ 5. Ka5
0:01	5/8	-2.24	123059		1. c4 f1=Q 2. c5 Qh3 3. cxb6 Qxh7
					4. Bc5 Bb2 5. Ra2
0:04	6/9	-2.74	284927		1. c4 f1=Q 2. c5 Qf2 3. Ra4 Qc2
					4. Ra3 bxc5 5. Bd6 Bf6
0:11	7/10	-3.21	826147		1. c4 f1=Q 2. c5 Qc1 3. cxb6 Qc8+
					4. b7+ Qxb7+ 5. Ka5 Qxh7 6. Bc5
					Bb2 7. Rb3 Qc7+ 8. Kb4
0:29	8/11	-5.41	2172831		1. c4 f1=Q 2. c5 Qc1 3. cxb6 Qc8+
					4. b7+ Qxb7+ 5. Ka5 Ne2 6. Kb4
					Nd4 7. e5 Qf7 8. Bd6 Nc2+ 9. Ka4
					Nxa3 10. Kxa3 Qxf5
1:33	9/12	-5.65	7275926		1. c4 f1=Q 2. c5 Qc1 3. cxb6 Qc8+
					4. b7+ Qxb7+ 5. Ka5 Ne2 6. Kb4
					Nd4 7. f6 Nc2+ 8. Ka4 Nxa3 9. Bxa3
					Bxf6
3:36	10/13	-5.97	17871875	1. c4 f1=Q 2. c5 Qc1 3. cxb6 Qc8+
					4. b7+ Qxb7+ 5. Ka5 Ne2 6. Kb4
					Nd4 7. Ra5 Qf7 8. Bg7 Qb3+ 9. Kc5
					Bxg7
4:34	10/13	-1.89	22147654	1. Ra1 Bxa1 2. c3 Bxc3 3. d4 Bxd4
					4. e5 Bxe5 5. f6 f1=Q 6. h8=Q Bb8
					7. Qh1+ Qf3 8. Qxf3+ Nxf3 9. Bb4
					Ne5
4:52	11/14	-2.13	23591392	1. Ra1 Bxa1 2. c3 Bxc3 3. d4 Bxd4
					4. e5 Bxe5 5. f6 f1=Q 6. h8=Q Bb8
					7. Qh1+ Qf3 8. Qxf3+ Nxf3 9. Ba3
					Ne5 10. Bb4 Nd7
6:40	12/15	-2.11	32408033	1. Ra1 Bxa1 2. c3 Bxc3 3. d4 Bxd4
					4. e5 Bxe5 5. f6 f1=Q 6. h8=Q Bb8
					7. Qh1+ Qf3 8. Qxf3+ Nxf3 9. Ba3
					Ng5 10. Bb4 Ne6
12:02	13/16	-1.13	58336548	1. Ra1 Bxa1 2. c3 Bxc3 3. d4 Bxd4
					4. e5 Bxe5 5. f6 f1=Q 6. h8=Q Qh3
					7. Bg7+ Qxh8 8. Bxh8 Nf3 9. f7
					Bd6 10. Bg7 Kb8 11. f8=Q+ Bxf8
					12. Bxf8
24:30	14/17	-1.05	119122388	1. Ra1 Bxa1 2. c3 Bxc3 3. d4 Bxd4
					4. e5 Bxe5 5. f6 f1=Q 6. h8=Q Qh3
					7. Bg7+ Qxh8 8. Bxh8 Nf3 9. f7
					Bd6 10. Bg7 Nd2 11. f8=Q+ Bxf8
					12. Bxf8 Ne4

jm



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