11 Nolot Positions revisted

[zullil]

11 Nolot Positions
Houdini 1.5ab-16 x64 [12 thr 14 spl] (4096 MB)
Solved 10 of 11 positions
did not solve #9
I will check out #9 more tomorrow

Hello !
If you could run an overnight analysis with 3 best moves for pos #9, it would be very interesting ...

I don't use Houdini, and my machine has only 8 cores, but I'll do this with Critter 1.2.1 and post the results tomorrow.

After an hour, here's Critter's first choice:

Code: Select all

27/86+ 62:11 41025203061 10994239  +1.46 Nxh6 gxh6 Bxh6 Bg6 Ng5 Qa4 Rxc5 Bxc5 Rc1 Qb5 Be4 Be7 Rxc6 Qxe5 f4 Qf6 Bxf8 Rxf8 Rc7 Bd8 Rd7 Kg8 Kh2 a4 Bxg6 Qxg6 h5 Qf6 Ne4 Qh6 Ra7 a3 bxa3 bxa3 Rxa3 Bb6 Ra6 Bc7 Qg4+ Kh8

After two more hours:

Code: Select all

27/86+ 62:11 41025203061 10994239  +1.46 Nxh6 gxh6 Bxh6 Bg6 Ng5 Qa4 Rxc5 Bxc5 Rc1 Qb5 Be4 Be7 Rxc6 Qxe5 f4 Qf6 Bxf8 Rxf8 Rc7 Bd8 Rd7 Kg8 Kh2 a4 Bxg6 Qxg6 h5 Qf6 Ne4 Qh6 Ra7 a3 bxa3 bxa3 Rxa3 Bb6 Ra6 Bc7 Qg4+ Kh8
27/86+ 113:05 72533069995 10689779  +1.55 Nxh6 gxh6 Bxh6 Bg6 Ng5 Qa4 Rxc5 Bxc5 Rc1 Qb5 Be4 Be7 Bxf8 Rxf8 Rxc6 Qxe5 Nf3 Qh5 Bxg6 fxg6 Qe5+ Bf6 Qxh5+ gxh5 Kg2 a4 Ra6 a3 bxa3 bxa3 Rxa3 Kg7 Ra7+ Kg6 Rd7 e5 Nd2 Rb8 Rd6
27/86+ 177:18 115703235394 10876053  +1.68 Nxh6 gxh6 Bxh6 Bg6 Ng5 Qa4 Rxc5 Bxc5 Rc1 Qb5 Be4 Be7 Bxf8 Rxf8 Rxc6 Qxe5 Nf3 Qg7 Bxg6 Qxg6 Rc7 Re8 Ne5 Qf5 Rd7 a4 Rxd4 f6 Nc6 e5 Re4 a3 Nxe7 Rxe7 Rxb4 axb2 Rxb2 Rd7 Rb3 Kg8 Kg2 Kg7 Rc3

[ernest]

From the horse's mouth (Pierre Nolot himself):

http://talkchess.com/forum/viewtopic.ph ... 521#398521

[Uri Blass]

komodo 1 cpu solve 8 out of 10 at tournament time control (did not solve 3,5 and I believe 9 is wrong).

I suspect that people who claim that it is weak at tactics are wrong.

[zullil]

From the horse's mouth (Pierre Nolot himself):

http://talkchess.com/forum/viewtopic.ph ... 521#398521

This link takes me to a post made by you, not by any horse.

The Nolot.9 (Weinstein-Elyoseph) position test is recognized (even by the author) to be wrong...

I'm not suggesting that Ng5 is the best move, but I'm still wondering what the best move is.

[peter]

I'm not suggesting that Ng5 is the best move, but I'm still wondering what the best move is.

Hi!

Together with Anton Stadlhofer, who discussed the position rather long ago, as far as I remember, in German CSS forum with me and some others, I consider 1.Nf6 the best move but 1.Nxh6 should win for White too, I guess.
About 1.Ng5 I'm not quite sure, but it seems rather drawish to me.
Here's a .pgn I made with Houdini 1.5 on 12 cores:

[Event "?"]
[Site "Dort"]
[Date "2011.08.22"]
[Round "?"]
[White "Nolot, 9."]
[Black "?"]
[Result "1-0"]
[Annotator "Martan,Peter"]
[SetUp "1"]
[FEN "r4r1k/4bppb/2n1p2p/p1n1P3/1p1p1BNP/3P1NP1/qP2QPB1/2RR2K1 w - - 0 1"]
[PlyCount "7"]
[EventDate "2011.??.??"]

1. Nf6 (1. Ng5 hxg5 2. hxg5 (2. Bxg5 Nxd3 3. Rxd3 Bxd3 4. Qxd3 Bxg5 5. hxg5)
2... Rfc8 (2... Rac8 3. Nf6 gxf6 (3... Nb8 4. Qh5 Bxf6 5. gxf6 gxf6 6. Rxc5
Rxc5 7. Be4 f5 8. Kg2 Rg8 9. Rh1 Rg7 10. Bh6 Nd7 11. Bxg7+ Kxg7 12. Qxh7+) 4.
gxf6 Rfe8 5. Qh5 (5. Bxc6 Rxc6 6. fxe7 Bg6 7. Bg5 f5 8. Rc4 Kg8 9. Rdc1 a4 10.
Bf6 Nxd3 11. Qxd3 Rxc4 12. Rxc4 Qxb2 13. Qxd4 Qxd4 14. Rxd4 Bh5 15. Rxb4 Bd1
16. Rd4 Bb3 17. Rd3 Kf7 18. Kg2 Bd5+ 19. Kh3 Rb8 20. Ra3) 5... Kg8 (5... Rg8 $2
6. Rxc5 Bxc5 7. Be4 Ne7 8. Kg2 Qd5 9. Bxd5)) 3. Nf6 Bg6 4. Qg4 gxf6 5. gxf6
Nxd3 6. Rxd3 Bf8) (1. Nxh6 gxh6 (1... Bg6 2. Nxf7+ Rxf7 3. Ng5 Bxg5 4. hxg5) 2.
Bxh6 Bg6 3. Ng5 Qa4 4. h5 Bf5 5. Rxc5 Bxc5 6. g4) 1... Rac8 (1... Bf5 2. g4
Bxd3 3. Rxd3) (1... Rfc8 2. Bxh6 gxh6 3. Qd2) 2. Bxh6 (2. Nxh7 Kxh7 3. Ra1 Qb3
4. Nd2) 2... Bf5 (2... Qa4 3. Nxh7) (2... Bg6 3. h5) (2... Na4 3. Ng5) (2...
gxh6 3. Qd2) 3. Bg5 Nxe5 4. Ra1 1-0

After going backward these variants, here's Houdini's output after 15 more minutes with 3 variants simultaneously:

32: Nolot,9, 2011
r4r1k/4bppb/2n1p2p/p1n1P3/1p1p1BNP/3P1NP1/qP2QPB1/2RR2K1 w - - 0 1

Analysis by Houdini 1.5ab-16 x64:

1. +/- (1.35): 1.Sf6 Tac8 2.Sxh7 Kxh7 3.Ta1 Db3 4.Sd2 Dxb2 5.Tdb1 Dc3 6.Tc1 Db2 7.Dd1 Kg8 8.Tc2 Dc3 9.Txc3 dxc3 10.Lxc6 Txc6 11.d4 Td8 12.Df3 Tc7 13.dxc5 cxd2 14.c6 a4 15.Td1 a3 16.Lxd2 a2 17.Lxb4 Txd1+ 18.Dxd1 Lxb4 19.Dd8+ Lf8 20.Da8 Txc6 21.Dxa2 Tc5 22.Db2
2. +/- (1.15): 1.Sxh6 gxh6 2.Lxh6 Lg6 3.Sg5 Da4 4.h5 Lf5 5.Txc5 Lxc5 6.g4 Se7 7.Lxa8 Txa8 8.Tc1 Lb6 9.gxf5 Sxf5 10.Sxf7+ Kh7 11.Lf4 Dd7 12.Sd6 Dg7+ 13.Kf1 Tf8 14.Df3 Sh4 15.De4+ Kg8
3. = (-0.08): 1.Se1 Tac8 2.Sf6 Lg6 3.h5 Lf5 4.g4 Sxe5 5.Lxe5 gxf6 6.Ta1 Db3 7.Lxd4 Lh7 8.Le3 a4 9.d4 Sd7 10.Db5 Tfd8 11.Td2 f5 12.gxf5 Lxf5 13.Lxh6 Sf6 14.Dxa4 Dxa4 15.Txa4 Sd5 16.Ta7 Kh7 17.Lxd5 Kxh6 18.Txe7 Txd5 19.Txf7 Tg8+ 20.Kf1 Kxh5 21.Sf3


I'll keep it running on 3 variants over night and show output again, if there's some significant change

BTW here some more output, R4.1 after 3 hours on 2 variants and 4 cores, having backward solved the main variants from above too:

Analysis by Deep Rybka 4.1 w32:

1. +/- (1.26): 1.Sf6 Tfc8 2.Sxh7 Kxh7 3.Sd2 Tab8 4.Sc4 a4 5.Sd6[] Sd8 6.Sxc8 Txc8 7.Ld2 Db3 8.Tc4 Tb8 9.Le1 a3 10.bxa3 bxa3 11.Txd4 Kg8 12.Tc4 Sa4 13.Tdc1 Db5 14.Le4 Sb6 15.Tc7 Kf8 16.Dc2
2. +/- (0.95): 1.Sxh6 Lg6 2.Sxf7+ Txf7 3.Sg5 Txf4 4.Lxc6 Tc8 5.Ta1 Txf2 6.Dxf2 Db3 7.Lb5 Sxd3 8.Lxd3 Lxd3 9.Sxe6 Dxe6 10.Txd3 a4 11.De2 a3 12.bxa3 bxa3 13.Kh2 Lb4 14.Tdxa3 Lxa3 15.Txa3 Te8 16.Td3

[zullil]

Here's what Critter-1.2.1 (8 threads, 4GB hash) had with MultiPV=3 when the search was unexpectedly interrupted:

Code: Select all

25/90  185:54 124527867280 11163533  +1.71 Nf6 Rfc8 Bxh6 gxh6 Qd2 Bf8 Rxc5 Ne7 Rcc1 Rxc1 Rxc1 Rc8 Rxc8 Nxc8 Qf4 Qb1+ Kh2 Qxd3 Nxd4 Bg8 Nc6 Qc2 Qd4 Bg7 Qd8 Bxf6 exf6 Qxb2

25/90  185:54 124527867280 11163533  +1.41 Nxh6 gxh6 Bxh6 Bg6 Ng5 Qa4 h5 Bf5 Rxc5 Bxc5 Rc1 Qb5 g4 Qxd3 Qxd3 Bxd3 Rxc5 Rfc8 Rxc6 Rxc6 Bxc6 Ra7 Bf8 Rc7 Ba4 Bb1 f3 d3 Ne4 b3 Bxb3 Rb7 Nd2 Ba2

25/90  185:54 124527867280 11163533  +1.32 Bxh6 Bf5 Qd2 Bxg4 Rxc5 Rfc8 Rxc6 Rxc6 Qf4 Rac8 Nxd4 Rc5 Qxf7 Bf8 Be4 R5c7 Qg6 gxh6 Qxg4 Qxb2 Nxe6 Qxe5 d4 Qd6 Nxc7 Rxc7 Qf5 a4 Kg2 Qe7 d5 Rd7 d6 Qg7 Bc6 Rxd6 Rxd6 Bxd6 Bxa4 Qb7+ Kh2 Qg7