Author: Jeremiah Penery
Date: 00:24:42 05/18/05
Go up one level in this thread
On May 17, 2005 at 22:31:25, Eelco de Groot wrote:
>Pro Deo 1.1 Q5T about Nolot #3, keymove is supposed to be Nxg5, most programs
>eventually play Bxg5. So does the Q5T, but only with +0.36
>[D]r2qk2r/ppp1b1pp/2n1p3/3pP1n1/3P2b1/2PB1NN1/PP4PP/R1BQK2R w KQkq - bm Nxg5; id
>"Position 3";
>
...
> 00:00:21 11.00 0.54 1.Qc2 Bxf3 2.gxf3 Nxf3 3.Kd1 Qd7 4.Nh5 O-O-O
> 5.Nxg7 Rdg8 6.Nxe6 Ncxe5
> 00:01:02 12.00 0.46 1.Qc2 Bxf3 2.gxf3 Nxf3 3.Kd1 Qd7 4.Rf1 Nfxd4
> 5.cxd4 Nxd4 6.Qc3 c5 7.Ne2 Nxe2 8.Kxe2 O-O-O
> 9.Rf7
> 00:01:12 12.01 0.58 1.Bxg5 Bxg5 2.O-O Qe7 3.h3
> 00:04:15 13.00 0.36 1.Bxg5 Bxg5 2.h3 Bh4 3.hxg4 Bxg3 4.Kf1 Qd7
> 5.Rh3
>
>Vulcan Q1 does not find either Bxg5 or Nxg5 with a high score, with a slightly
>different positional evauation for mobility etc., it thinks h3 is best. This
>Nolot #3 position is still not "solved"
>(See also http://www.seanet.com/~brucemo/nolot/nolot.htm).
>
...
> 00:00:40 11.10 0.60 1.Rf1 g6 2.Bxg5 Bxg5 3.Qc2 Qe7 4.Nxg5 Qxg5
> 5.Qd2 Qxd2
> 00:01:09 12.00 0.32 1.Rf1 Nxf3 2.gxf3 Bh3 3.Rg1 Bh4 4.Kd2 a5 5.Kc2
> Ne7 6.Nh5
> 00:01:18 12.01 0.57 1.h3 Bxf3 2.gxf3 g6 3.f4 Nf7 4.Rg1 Rf8 5.Qb3
> Na5
> 00:02:12 13.00 0.70 1.h3 Bxf3 2.gxf3 g6 3.f4 Nf7 4.Rg1 Bh4 5.b3
> Nh6 6.Ba3 Be7 7.Bxe7
> 00:04:28 14.00 0.73 1.h3 Bxf3 2.gxf3 g6 3.f4 Nf7 4.Rg1 Rf8 5.f5
> 00:12:18 15.00 0.64 1.h3 Bxf3 2.gxf3
I've studied the Nolot positions a lot, and I'm quite sure that position #3 is
correct with Nxg5. White has a crushing attack, and most of black's pieces are
paralyzed.
This is output from a modified Crafty 19.19, with some form of singular
extensions among other things:
White(1): analyze
Analyze Mode: type "exit" to terminate.
clearing hash tables
time surplus 0.00 time limit 22.50 (3:30)
depth time score variation (1)
...
11 15.76 0.14 1. Be3 O-O 2. Bxg5 Bxg5 3. Qc2 h6 4.
Bh7+ Kh8 5. Nxg5 Qxg5 6. Rf1 Rxf1+
7. Nxf1
11 20.06 0.20 1. Bxg5 Bxg5(S) 2. Rf1(H) Qe7(H) 3.
Qa4(H) Bf4(H) 4. Ne2(H) Be3(H) 5. h3(H)
Bh5(H) 6. Qd1(H) <HT>
11-> 23.59 0.20 1. Bxg5 Bxg5(S) 2. Rf1 Qe7 3. Qa4 Bf4
4. Ne2 Be3 5. h3 Bh5 6. Qd1 <HT>
12 31.70 0.03 1. Bxg5 Bxg5(S) 2. Rf1 Qe7 3. Qa4 O-O-O
4. Bb5 Nb8 5. Nxg5 Qxg5 6. Qxa7 Rhf8
12 1:03 0.08 1. Be3 g6 2. Bb5 Ne4 3. Qa4 Qd7 4.
Nxe4 dxe4 5. Ng5 O-O-O 6. O-O Bf5 7.
Bxc6 Qxc6 8. Qxa7
12 1:23 0.41 1. Nxg5 Bxd1(S) 2. Nxe6(H) Qb8(H) 3.
Nxg7+(H) Kf7(H) 4. Bh6(H) Bf8(H) 5.
Rf1+(H) Kg8(H) 6. N3f5(H) Bg4(H) 7.
e6(H) <HT>
12-> 1:31 0.41 1. Nxg5 Bxd1(S) 2. Nxe6 Qb8 3. Nxg7+
Kf7(S) 4. Bh6 Bf8 5. Rf1+ Kg8 6. N3f5
Bg4 7. e6 <HT>
13 2:05 0.70 1. Nxg5 Bxd1(S) 2. Nxe6 Qc8(S) 3. Nxg7+
Kf7(S) 4. O-O+(H) Kxg7(H) 5. Nf5+(H)
Qxf5(H) 6. Bxf5(H) Bh5(H) 7. b4(H)
Bg6(H) 8. Bg4(H) <HT>
13-> 2:32 0.70 1. Nxg5 Bxd1(S) 2. Nxe6 Qc8(S) 3. Nxg7+
Kf7(S) 4. O-O+ Kxg7(S) 5. Nf5+ Qxf5
6. Bxf5 Bh5 7. b4 Bg6 8. Bg4 <HT>
The score continues to rise at higher iterations.
17-> 27:17 1.24 1. Nxg5 Bxd1 2. Nxe6 Qb8(S) 3. Nxg7+
Kf7 4. N7f5 Ba4 5. O-O Ke8 6. b3(S)
Bxb3 7. axb3 <HT>
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