Author: Dann Corbit
Date: 19:55:30 03/04/02
Go up one level in this thread
On March 04, 2002 at 17:43:29, Albert Silver wrote:
>The following position occurred in Spassky-Beliavsky, Reykjavik, 1988
>
>[D]2b1qrk1/5p1p/pBn3p1/1p2p3/4P2N/bBP1Q3/P4PPP/3R2K1 w - -
>
>Spassky found a tremendous move 25.Nxg6!! and won the game. I don't think any
>engines will have much luck with it but feel free to try it. I've analyzed it in
>detail and can verify that it is the strongest move and correct, so as a further
>challenge, see if you can find the *strongest* continuation after the possible
>defense: 25...hxg6 26.Qh6 Be6!?
The new GLC says this:
>epd 999 \nxg6.epd
Line 001: Test [Nxg6]...
Generating internal KP-K end-game table...
Done (0.311 secs)
Game stage: Middle game
Current eval: 0.276
Ply Time Score Nodes Principal Variation
4 0.02 +0.053 5730 Bd5 Ne7 2. Bb3 Bb7
4 0.03 +0.053 13473 Bd5 Ne7 2. Bb3 Bb7
5 0.05 +0.051 21854 Bd5 Bg4 2. Nf3 Qd7 3. c4
5 0.11 +0.121 64153 c4 Qe7 2. cxb5 axb5 3. Qh6 Bb7
5 0.13 +0.121 74296 c4 Qe7 2. cxb5 axb5 3. Qh6 Bb7
6 0.15 +0.070 91419 c4 Qe7 2. cxb5 axb5 3. Qh6 Be6 4. Bxe6 Qxe6
6 0.27 +0.070 171617 c4 Qe7 2. cxb5 axb5 3. Qh6 Be6 4. Bxe6 Qxe6
7 0.36 +0.046 238211 c4 Qe7 2. cxb5 axb5 3. Qh6 Be6 4. Bxe6 Qxe6 5. Rd2
7 0.72 +0.221 449451 Bd5 Bb7 2. Nf3 Qe7 3. Ng5 Bd6 4. f3
7 0.83 +0.221 529585 Bd5 Bb7 2. Nf3 Qe7 3. Ng5 Bd6 4. f3
8 1.73 +0.089 1046198 Bd5 Ne7 2. c4 b4 3. Ba8 Qa4 4. Rd6 Be6
8 2.26 +0.342 1393452 c4 Qe7 2. cxb5 axb5 3. Nf3 Bg4 4. Rd5 b4 5. Ng5
8 2.51 +0.342 1570209 c4 Qe7 2. cxb5 axb5 3. Nf3 Bg4 4. Rd5 b4 5. Ng5
9 4.41 +0.324 2789434 c4 Bb4 2. cxb5 axb5 3. Nf3 Be6 4. a3 Bxb3 5. Qxb3
Be7 6. Qe3
9 5.98 +0.324 3858858 c4 Bb4 2. cxb5 axb5 3. Nf3 Be6 4. a3 Bxb3 5. Qxb3
Be7 6. Qe3
10 10.31 +0.413 6654866 c4 Qe7 2. Nf3 Bb7 3. cxb5 axb5 {ht}
10 12.04 +0.413 7904690 c4 Qe7 2. Nf3 Bb7 3. cxb5 axb5 {ht}
11 29.56 +0.321 19057k c4 Bg4 2. f3 Bc8 3. cxb5 axb5 4. Bxf7+ Rxf7 5. Qxa3
g5 6. Nf5 Bxf5 7. exf5 Rxf5
11 51.66 +0.367 33187k Nf3 Bg4 2. Bd5 Qd7 3. h3 Bxf3 4. Qxf3 Bb2 5. Rb1
Ba3 6. c4 Bb4 7. cxb5 axb5
11 55.95 +0.367 35932k Nf3 Bg4 2. Bd5 Qd7 3. h3 Bxf3 4. Qxf3 Bb2 5. Rb1
Ba3 6. c4 Bb4 7. cxb5 axb5
12 1:31 +0.461 57301k Nf3 Bg4 2. Bd5 Qd7 3. c4 Bd6 4. h3 Bxf3 5. Qxf3
bxc4 6. Bxc4 Qb7 7. Qe3 Rb8
12 2:26 +0.461 93675k Nf3 Bg4 2. Bd5 Qd7 3. c4 Bd6 4. h3 Bxf3 5. Qxf3
bxc4 6. Bxc4 Qb7 7. Qe3 Rb8
13 5:23 +0.617 200462k Nf3 Bg4 2. c4 Be7 3. cxb5 axb5 4. h3 Bxf3 5. Qxf3
Qb8 6. Qe3 Qb7 7. Bd5 Rc8 8. f3
13 7:50 +0.617 298258k Nf3 Bg4 2. c4 Be7 3. cxb5 axb5 4. h3 Bxf3 5. Qxf3
Qb8 6. Qe3 Qb7 7. Bd5 Rc8 8. f3
14 11:52 +0.534 446732k Nf3 Bg4 2. c4 Be7 3. cxb5 axb5 4. h3 Bxf3 5. Qxf3
Qb8 6. Qe3 Bg5 7. Qxg5 Qxb6 8. Rd7 Qc5
local: t=16:39 nps=638782.3 n=638153773 (18.0% / 82.0%) fh=89.1%
total: t=16:39 nps=638782.3 n=638153773 draws=416196
trans: probes=114468411 hits=14489233 (12.66%) draft=9787234 (8.55%)
tcuts: exact=1219 (0.00%) upper=6641525 (5.80%) lower=2411588 (2.11%)
tstor: exact=1748 (0.00%) upper=43586187 (72.25%) lower=16741263 (27.75%)
ext: check=37626828 recap=1761032 ppush=80439 1rep=2657617 thrt=0
q-moves: gen=440786013 tested=217181268 made/un=86757959 max-dep=14
max eval diff: part-1=3.296 part-2=2.346
!m Nh4-f3 534 5166 Bd5 >
move h4f36 3/48 Bd5 >
time left 10.00
-> Score=534 PV=Nf3 Bg4 2. c4 Be7 3. cxb5 axb5 4. h3 Bxf3 5. Qxf3 Qb8 6. Qe3
Bg5 7. Qxg5 Qxb6 8. Rd7 Qc5
Game finished test: 0
>
--------------------------------------------
2b1qrk1/5p1p/pBn3p1/1p2p3/4P2N/bBP1Q3/P4PPP/3R2K1 w - - bm Nxg6;
Line 001: Test [Nxg6]: failed [Nf3; score=0.534]
Passed 0 out of 1 (0 invalid)
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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