Arasan 19.0 + updated test suite

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Krzysztof Grzelak
Posts: 1525
Joined: Tue Jul 15, 2014 12:47 pm

Re: Arasan 19.0 + updated test suite

Post by Krzysztof Grzelak »

Thanks for the advice. I deleted this file because it would not affect the engine. Now I test programs ChessGUI and Shredder Classic 4 option SyzygyProbeDepth - 4 - 5 - 6.
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jdart
Posts: 4366
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Re: Arasan 19.0 + updated test suite

Post by jdart »

I don't think you are going to see any big change by altering the SyzygyProbeDepth. In general tbs have a modest effect on playing strength, because many games are decided before they kick in, and many endgames even in TB range can be played ok using search. And then if you set a large depth it will still probe at the root and the next two plies, so it will play 6-man endgames perfectly. So to see an effect you have to be in a game where tbs are used, where search is fallible, and where some key line with tbs is only reached deep in the search.

--Jon
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Krzysztof Grzelak
Posts: 1525
Joined: Tue Jul 15, 2014 12:47 pm

Re: Arasan 19.0 + updated test suite

Post by Krzysztof Grzelak »

jdart wrote:I don't think you are going to see any big change by altering the SyzygyProbeDepth. In general tbs have a modest effect on playing strength, because many games are decided before they kick in, and many endgames even in TB range can be played ok using search. And then if you set a large depth it will still probe at the root and the next two plies, so it will play 6-man endgames perfectly. So to see an effect you have to be in a game where tbs are used, where search is fallible, and where some key line with tbs is only reached deep in the search.

--Jon
Unfortunately but you are right Jon.
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Sylwy
Posts: 4465
Joined: Fri Apr 21, 2006 4:19 pm
Location: IASI - the historical capital of MOLDOVA
Full name: SilvianR

Re: Arasan 19.0 + updated test suite

Post by Sylwy »

Krzysztof Grzelak wrote:What kind of error you are writing and under what GUI. I did a test program ChessGUI with syzygy probe depth =6. The program does not show any error.
They are two different parameters here: ProbeLimit & ProbeDepth ! See please the explanations of Syzygy Bases author - Mr.Ronald de Man.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Arasan 19.0 + updated test suite

Post by Vinvin »

Results with latest SF on the previous 44 unsolved positions. 90 seconds per position :

Code: Select all

Analyzing engine: Stockfish_16050620_x64_modern
08/05/16 01:51:34 Level: 90 Seconds
   Use seconds per move      : 90 Seconds per move
   Analysis Lines            : Minimum search depth=12
   Activate abort analysis   : True. Minimal analysis depth 22. Abort, if the correct move is held 3 additional ply

  1) g2-g4              g2-g4   * 26 Seconds
  2) Bg5-d8             Bg5-d8  * 11 Seconds
  3) .. Rf6-f3          Rf6-f3  * 26 Seconds
  4) Nf3xg5             Nf3xg5  * 64 Seconds
  5) Be3-h6             Be3-h6  * 35 Seconds
  6) Qd2-f4             Qd2-f4  * 30 Seconds
  7) Qg5-h6             Qg5-h6  * 83 Seconds
  8) Bg5-f6             Bg5-f6  * 27 Seconds
  9) f5-f6              c6-c7    
 10) Bd3xh7             Bf4-e3   
 11) .. Ne8-c7          Ne8-f6   
 12) g2-g3              g2-g3   * 3 Seconds
 13) Rh5xg5             a2-a4    
 14) Nd4-b5             Nd4-b5  * 10 Seconds
 15) Rg5xg7             Rg5xg7  * 25 Seconds
 16) Bb1xh7             Nc3-e4   
 17) Rf3-f6             Rf3-f2   
 18) Bd3xh7             Rf1-h1   
 19) g4-g5              a2-a4    
 20) Qf2-g3             Qf2-g3  * 4 Seconds
 21) Nf4-d3             h4xg5    
 22) .. Bb7-d5, ...     Qc7-a5   
 23) Ng3-h5             Kf1-g2   
 24) b2-b4              Bd4-g1   
 25) .. Re3xf3          Rf6-h6   
 26) Rf1-c1             Ba6-e2   
 27) Re1-e5             c3-c4    
 28) Qc4xc8             Qc4xc8  * 47 Seconds
 29) Qf3-f6             Nc3-e2   
 30) Rf1xf6             Bd4-a7   
 31) .. Qg5xg3          Be6xa2   
 32) e4-e5              e4-e5   * 24 Seconds
 33) Rg1xg7             Qh4-f6   
 34) .. Bd7-h3          Bg7-h6   
 35) Bd3xh7             Bd3xh7  * 55 Seconds
 36) .. b4-b3           b4-b3   * 1 Second
 37) Bf1-e2             Bf1-e2  * 85 Seconds
 38) Bb4xe7             Bb4xe7  * 72 Seconds
 39) Kg1-f2, ...        Ra1-e1   
 40) Ne4-g5             Ne4-g5  * 34 Seconds
 41) Nd4-c6             Nd4-c6  * 5 Seconds
 42) h5-h6              h5-h6   * 20 Seconds
 43) f3-f4              Ke8-d7   
 44) b3-b4              b3-b4   * 21 Seconds
22 of 44 matching moves
08/05/16 02:47:46, Total time: 00:56:12 Rated time: 44:48 = 2688 Seconds
Vinvin wrote:Arasan Testsuite V19 with SF on an i7-6*4GHz+Syzygy : 156 found on 200.

Solution not found for :

Code: Select all

r2q3r/1p1bbQ2/4p1Bk/3pP3/1n1P1P1p/pP6/Pn4PP/R1B1R1K1 w - - bm g4; id "arasan19.10"; c0 "Fier-Ryan, Sabadell op 2009";
1rb2k1r/2q2pp1/p2b3p/2n3B1/2QN4/3B4/PpP3PP/1K2R2R w - - bm Bd8; id "arasan19.12"; c0 "Volokitin-Mamedyarov, EU Club Cup Eilat ISR 2012";
5rk1/1pp3p1/3ppr1p/pP2p2n/4P2q/P2PQ2P/2P1NPP1/R4RK1 b - - bm Rf3; id "arasan19.13"; c0 "Arasan-Crafty, test game 2012";
rn1q1rk1/2pbb3/pn2p3/1p1pPpp1/3P4/1PNBBN2/P1P1Q1PP/R4R1K w - - bm Nxg5; id "arasan19.16"; c0 "Dann Corbit, CCC 2015";
3q1rk1/pr1b1p1p/1bp2p2/2ppP3/8/2P1BN2/PPQ3PP/R4RK1 w - - bm Bh6; id "arasan19.20"; c0 "Shredder-Rybka, WCCC 2006";
r5n1/p1p1q2k/4b2p/3pB3/3PP1pP/8/PPPQ2P1/5RK1 w - - bm Qf4; id "arasan19.23"; c0 "Shulman-Marciano, Ubeda 1997";
r2q1rk1/ppp2p2/3p1np1/4pNQ1/4P1pP/1PPP4/1P3P2/R3K1R1 w Q - bm Qh6; id "arasan19.34"; c0 "Morella-Fernandez, Cuba 1998";
r4rk1/p4ppp/qp2p3/b5B1/n1R5/5N2/PP2QPPP/1R4K1 w - - bm Bf6; id "arasan19.38"; c0 "Alekhine-Sterk, Budapest 1921";
2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - bm f6; id "arasan19.41"; c0 "study by Smyslov";
rn1qr1k1/1p2bppp/p3p3/3pP3/P2P1B2/2RB1Q1P/1P3PP1/R5K1 w - - bm Bxh7+; id "arasan19.42"; c0 "Polugaevsky-Torre, London 1984";
q3nrk1/4bppp/3p4/r3nPP1/4P2P/NpQ1B3/1P4B1/1K1R3R b - - bm Nc7; id "arasan19.52"; c0 "Karjakin-Anand, Corus Wijk aan Zee 2006";
r1b2rk1/pp1p2pR/8/1pb2p2/5N2/7Q/qPPB1PPP/6K1 w - - bm g3; id "arasan19.59"; c0 "Rybka-Shredder, WCCCC Pamplona Openclass 2009";
5rk1/8/pqPp1r1p/1p1Pp1bR/4B3/5PP1/PP2Q1K1/R7 w - - bm Rxg5+; id "arasan19.61"; c0 "sedarpi-noamgmi, www.chesspresso.net 2014";
2k1r2r/1pqb1p2/p2pp2b/4n1p1/PQ1NP2p/1P3P1P/2P1NBP1/R4RK1 w - - bm Nb5; id "arasan19.71"; c0 "Pacificrabbit (Rybka 3)-Anarquia69 (Rybka 3), playchess.com 2009";
r4rk1/pp1qbppp/1n6/6R1/P1pP4/5Q1P/2B2PP1/2B2RK1 w - - bm Rxg7+; id "arasan19.75"; c0 "Anand-Adams, Oakham 1990";
1qrrbbk1/1p1nnppp/p3p3/4P3/2P5/1PN1N3/PB2Q1PP/1B2RR1K w - - bm Bxh7; id "arasan19.77"; c0 "Georgiev-Ionescu, UAE 1986";
r3r2k/1pq2pp1/4b2p/3pP3/p1nB3P/P2B1RQ1/1PP3P1/3R3K w - - bm Rf6; id "arasan19.91"; c0 "Houdini 1.5-Rybka 4, Pal Larkin 2011";
1r3rk1/3bbppp/1qn2P2/p2pP1P1/3P4/2PB1N2/6K1/qNBQ1R2 w - - bm Bxh7+; id "arasan19.96"; c0 "nick-Fritz 11, playchess.com 2011";
1r2r1k1/2R2p2/1N1Rp2p/p2b3P/4pPP1/8/P4K2/8 w - - bm g5; id "arasan19.99"; c0 "ENGINEMASTER-Arasan, ICC 2015";
2b2qk1/1r4pp/2p1p3/p2n1PPB/2p4P/2p5/P4Q2/4RRK1 w - - bm Qg3; id "arasan19.106"; c0 "Lafarga Santorromán-Kukk, ICCF Olympiad 17 Final 2009";
8/4nk2/1p3p2/1r1p2pp/1P1R1N1P/6P1/3KPP2/8 w - - bm Nd3; id "arasan19.116"; c0 "Grandelius-Raznikov, EU Youth Chess Ch B18, Albena 2011";
6k1/1bq1bpp1/p6p/2p1pP2/1rP1P1P1/2NQ4/2P4P/K2RR3 b - - bm Bd5; id "arasan19.117"; c0 "Hard CCC 2008 #6 (Vincent Lejeune)";
4rrk1/1pp1n1pp/1bp1P2q/p4p2/P4P2/3R2N1/1PP2P1P/2BQRK2 w - - bm Nh5; id "arasan19.119"; c0 "Ruy Lopez position (posted by Neel Basant)";
3q4/4k3/1p1b1p1r/p2Q4/3B1p1p/7P/1P4P1/3R3K w - - bm b4; id "arasan19.120"; c0 "Stockfish 021113-Naum 4.6, nTCEC - Stage 4 - Season 2 2013";
7k/3q1pp1/1p3r2/p1bP4/P1P2p2/1P2rNpP/2Q3P1/4RR1K b - - bm Rxf3; id "arasan19.122"; c0 "Darkraider (Stockfish 2.1.1JA)-Pastorale(Houdini 1.5a), playchess.com 2011";
3r3r/k1p2pb1/B1b2q2/2RN3p/3P2p1/1Q2B1Pn/PP3PKP/5R2 w - - bm Rfc1; id "arasan19.123"; c0 "Naum 4.2 MP-Deep Hiarcs 13.2, SSDF 2011";
r1b3kr/pp1n2Bp/2pb2q1/3p3N/3P4/2P2Q2/P1P3PP/4RRK1 w - - bm Re5; id "arasan19.124"; c0 "Orcrist-Crafty, ICC 2011";
1nr3k1/q4rpp/1p1p1n2/3Pp3/1PQ1P1b1/4B1P1/2R2NBP/2R3K1 w - - bm Qxc8+; id "arasan19.129"; c0 "Runting-Barnsley, Purdy Jubilee-A email 2003";
r2q1r2/1b2bpkp/p3p1p1/2ppP1P1/7R/1PN1BQR1/1PP2P1P/4K3 w - - bm Qf6+; id "arasan19.132"; c0 "Asauskas-Malisauskas, Vilnius 2004";
1rr1b1k1/1pq1bp2/p2p1np1/4p3/P2BP3/2NB2Q1/1PP3PP/4RR1K w - - bm Rxf6; id "arasan19.134"; c0 "Glek-Lingnau, Dortmund op-A 1992";
3r1r1k/pp5p/4b1pb/6q1/3P4/4p1BP/PP2Q1PK/3RRB2 b - - bm Qxg3+; id "arasan19.137"; c0 "Apicella-Lautier, Clichy 2001";
r2qrb1k/1p1b2p1/p2ppn1p/8/3NP3/1BN5/PPP3QP/1K3RR1 w - - bm e5; id "arasan19.147"; c0 "Spassky-Petrosian, World Chmp (19) 1969";
1r1rb1k1/5ppp/4p3/1p1p3P/1q2P2Q/pN3P2/PPP4P/1K1R2R1 w - - bm Rxg7+; id "arasan19.155"; c0 "Vescovi-Gschwendtner, Groningen op 1994 (Aemis Test Suite #30)";
r6k/N1Rb2bp/p2p1nr1/3Pp2q/1P2Pp1P/5N2/P3QBP1/4R1K1 b - - bm Bh3; id "arasan19.158"; c0 "Persson-Gerhardt, Simon Webb mem email 2007";
r1b2rk1/1pq1nppp/pbn1p3/8/3N4/3BBN2/PPP1QPPP/3R1RK1 w - - bm Bxh7+; id "arasan19.159"; c0 "Leu-Muck, DDR-ch H137 corr 1973";
5r2/3rkp2/2R2p2/p2Bb2Q/1p2P2P/4q1P1/Pp6/1K1R4 b - - bm b3; id "arasan19.169"; c0 "Hotmorphy (Deep Shredder 9)-Mr Blue Sky (HIARCS 12), playchess.com 2012";
r1b1k1r1/1p2np1p/p1n1pQp1/3p4/3NPP2/P2RB3/2PK2PP/q4B1R w q - bm Be2; id "arasan19.171"; c0 "Deep Junior 13.3 x64-Komodo 1176.00 x64 2014 (Clemens Keck)";
2r1k2r/pp1bb1pp/6n1/3Q1p2/1B1N4/P7/1q4PP/4RRK1 w k - bm Bxe7; id "arasan19.173"; c0 "Hannibal-Arasan, Variant-ICS, Amsterdam, NL 2013";
r1b3r1/5p1k/p1n2P1p/P1qpp1P1/1p1p4/3P2Q1/BPPB2P1/R4RK1 w - - bm Kf2; id "arasan19.179"; c0 "Efremov-Fischer, Danube/4 ICCF 2012";
r1qr1bk1/2p2pp1/ppn1p2p/8/1PPPN1nP/P4NP1/2Q2PK1/2BRR3 w - - bm Neg5; id "arasan19.184"; c0 "sedarpi-tazzzzz, www.chesspresso.net 2014";
r1b2r1k/4qp1p/p2ppb1Q/4nP2/1p1NP3/2N5/PPP4P/2KR1BR1 w - - bm Nc6; id "arasan19.185"; c0 "Kholmov-Bronstein, URS-ch32 Kiev 1964";
8/4bBpp/3p4/P6P/2PN2p1/3k1b2/P7/6K1 w - - bm h6; id "arasan19.188"; c0 "Timman, 1c Corus {m} 2008";
4K1k1/8/1p5p/1Pp3b1/8/1P3P2/P1B2P2/8 w - - bm f4; id "arasan19.189"; c0 "Šachová skladba 2011-12, 1st Prize";
8/k3qrpR/1p1p4/p2QpPp1/P1P1P1K1/1P6/8/8 w - - bm b4; id "arasan19.191"; c0 "Keres-Euwe, Netherlands (m/6) 1940";
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Paloma
Posts: 1167
Joined: Thu Dec 25, 2008 9:07 pm
Full name: Herbert L

Re: Arasan 19.0 + updated test suite

Post by Paloma »

1) What Hashsize was used by SF?

2) why are the three dot's after

* 22) .. Bb7-d5, ...
* 39) Kg1-f2, ...
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Arasan 19.0 + updated test suite

Post by Vinvin »

Paloma wrote:1) What Hashsize was used by SF?
8 GB
Paloma wrote: 2) why are the three dot's after

* 22) .. Bb7-d5, ...
* 39) Kg1-f2, ...
Probably a bug in Arena for the EPD decoding.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Arasan 19.0 + updated test suite

Post by Vinvin »

And now the 22 unsolved positions with the latest SF (6*4GHz, 8 GB hash, 6 pcs Syzygy), 15 minutes per positions, 2 runs : 14/22 and 16/22.

Code: Select all

Analyzing engine: Stockfish_16050620_x64_modern
   Use seconds per move      : 900 Seconds per move
   Analysis Lines            : Minimum search depth=12
   Activate abort analysis   : True. Minimal analysis depth 22. Abort, if the correct move is held 3 additional ply

  1) f5-f6              c6-c7    
  2) Bd3xh7             Bd3xh7  * 809 Seconds
  3) .. Ne8-c7          Ne8-c7  * 167 Seconds
  4) Rh5xg5             Rh5xg5  * 80 Seconds
  5) Bb1xh7             Bb1xh7  * 16 Seconds
  6) Rf3-f6             Rf3-f6  * 95 Seconds
  7) Bd3xh7             Bd3xh7  * 417 Seconds
  8) g4-g5              g4-g5   * 144 Seconds
  9) Nf4-d3             h4xg5    
 10) .. Bb7-d5, ...     Bb7-d5  * 47 Seconds
 11) Ng3-h5             Ng3-h5  * 60 Seconds
 12) b2-b4              Bd4-g1   
 13) .. Re3xf3          Rf6-h6   
 14) Rf1-c1             Rf1-c1  * 27 Seconds
 15) Re1-e5             c3-c4    
 16) Qf3-f6             Qf3-f6  * 594 Seconds
 17) Rf1xf6             Bd4-a7   
 18) .. Qg5xg3          Qg5xg3  * 107 Seconds
 19) Rg1xg7             Rg1xg7  * 240 Seconds
 20) .. Bd7-h3          Bg7-h6   
 21) Kg1-f2, ...        Kg1-f2  * 450 Seconds
 22) f3-f4              Ke8-d7   
14 of 22 matching moves

  1) f5-f6              c6-c7    
  2) Bd3xh7             Bd3xh7  * 242 Seconds
  3) .. Ne8-c7          Ne8-c7  * 72 Seconds
  4) Rh5xg5             Rh5xg5  * 238 Seconds
  5) Bb1xh7             Bb1xh7  * 91 Seconds
  6) Rf3-f6             Rf3-f6  * 139 Seconds
  7) Bd3xh7             Rf1-h1   
  8) g4-g5              g4-g5   * 124 Seconds
  9) Nf4-d3             h4xg5    
 10) .. Bb7-d5, ...     Bb7-d5  * 136 Seconds
 11) Ng3-h5             Ng3-h5  * 403 Seconds
 12) b2-b4              b2-b4   * 373 Seconds
 13) .. Re3xf3          Re3xf3  * 120 Seconds
 14) Rf1-c1             Rf1-c1  * 74 Seconds
 15) Re1-e5             c3-c4    
 16) Qf3-f6             Qf3-f6  * 549 Seconds
 17) Rf1xf6             Bd4-a7   
 18) .. Qg5xg3          Qg5xg3  * 263 Seconds
 19) Rg1xg7             Rg1xg7  * 336 Seconds
 20) .. Bd7-h3          Bd7-h3  * 280 Seconds
 21) Kg1-f2, ...        Kg1-f2  * 300 Seconds
 22) f3-f4              Ke8-d7   
16 of 22 matching moves
2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - bm f6; id "arasan19.41"; c0 "study by Smyslov";
rn1qr1k1/1p2bppp/p3p3/3pP3/P2P1B2/2RB1Q1P/1P3PP1/R5K1 w - - bm Bxh7+; id "arasan19.42"; c0 "Polugaevsky-Torre, London 1984";
q3nrk1/4bppp/3p4/r3nPP1/4P2P/NpQ1B3/1P4B1/1K1R3R b - - bm Nc7; id "arasan19.52"; c0 "Karjakin-Anand, Corus Wijk aan Zee 2006";
5rk1/8/pqPp1r1p/1p1Pp1bR/4B3/5PP1/PP2Q1K1/R7 w - - bm Rxg5+; id "arasan19.61"; c0 "sedarpi-noamgmi, www.chesspresso.net 2014";
1qrrbbk1/1p1nnppp/p3p3/4P3/2P5/1PN1N3/PB2Q1PP/1B2RR1K w - - bm Bxh7; id "arasan19.77"; c0 "Georgiev-Ionescu, UAE 1986";
r3r2k/1pq2pp1/4b2p/3pP3/p1nB3P/P2B1RQ1/1PP3P1/3R3K w - - bm Rf6; id "arasan19.91"; c0 "Houdini 1.5-Rybka 4, Pal Larkin 2011";
1r3rk1/3bbppp/1qn2P2/p2pP1P1/3P4/2PB1N2/6K1/qNBQ1R2 w - - bm Bxh7+; id "arasan19.96"; c0 "nick-Fritz 11, playchess.com 2011";
1r2r1k1/2R2p2/1N1Rp2p/p2b3P/4pPP1/8/P4K2/8 w - - bm g5; id "arasan19.99"; c0 "ENGINEMASTER-Arasan, ICC 2015";
8/4nk2/1p3p2/1r1p2pp/1P1R1N1P/6P1/3KPP2/8 w - - bm Nd3; id "arasan19.116"; c0 "Grandelius-Raznikov, EU Youth Chess Ch B18, Albena 2011";
6k1/1bq1bpp1/p6p/2p1pP2/1rP1P1P1/2NQ4/2P4P/K2RR3 b - - bm Bd5; id "arasan19.117"; c0 "Hard CCC 2008 #6 (Vincent Lejeune)";
4rrk1/1pp1n1pp/1bp1P2q/p4p2/P4P2/3R2N1/1PP2P1P/2BQRK2 w - - bm Nh5; id "arasan19.119"; c0 "Ruy Lopez position (posted by Neel Basant)";
3q4/4k3/1p1b1p1r/p2Q4/3B1p1p/7P/1P4P1/3R3K w - - bm b4; id "arasan19.120"; c0 "Stockfish 021113-Naum 4.6, nTCEC - Stage 4 - Season 2 2013";
7k/3q1pp1/1p3r2/p1bP4/P1P2p2/1P2rNpP/2Q3P1/4RR1K b - - bm Rxf3; id "arasan19.122"; c0 "Darkraider (Stockfish 2.1.1JA)-Pastorale(Houdini 1.5a), playchess.com 2011";
3r3r/k1p2pb1/B1b2q2/2RN3p/3P2p1/1Q2B1Pn/PP3PKP/5R2 w - - bm Rfc1; id "arasan19.123"; c0 "Naum 4.2 MP-Deep Hiarcs 13.2, SSDF 2011";
r1b3kr/pp1n2Bp/2pb2q1/3p3N/3P4/2P2Q2/P1P3PP/4RRK1 w - - bm Re5; id "arasan19.124"; c0 "Orcrist-Crafty, ICC 2011";
r2q1r2/1b2bpkp/p3p1p1/2ppP1P1/7R/1PN1BQR1/1PP2P1P/4K3 w - - bm Qf6+; id "arasan19.132"; c0 "Asauskas-Malisauskas, Vilnius 2004";
1rr1b1k1/1pq1bp2/p2p1np1/4p3/P2BP3/2NB2Q1/1PP3PP/4RR1K w - - bm Rxf6; id "arasan19.134"; c0 "Glek-Lingnau, Dortmund op-A 1992";
3r1r1k/pp5p/4b1pb/6q1/3P4/4p1BP/PP2Q1PK/3RRB2 b - - bm Qxg3+; id "arasan19.137"; c0 "Apicella-Lautier, Clichy 2001";
1r1rb1k1/5ppp/4p3/1p1p3P/1q2P2Q/pN3P2/PPP4P/1K1R2R1 w - - bm Rxg7+; id "arasan19.155"; c0 "Vescovi-Gschwendtner, Groningen op 1994 (Aemis Test Suite #30)";
r6k/N1Rb2bp/p2p1nr1/3Pp2q/1P2Pp1P/5N2/P3QBP1/4R1K1 b - - bm Bh3; id "arasan19.158"; c0 "Persson-Gerhardt, Simon Webb mem email 2007";
r1b3r1/5p1k/p1n2P1p/P1qpp1P1/1p1p4/3P2Q1/BPPB2P1/R4RK1 w - - bm Kf2; id "arasan19.179"; c0 "Efremov-Fischer, Danube/4 ICCF 2012";
4K1k1/8/1p5p/1Pp3b1/8/1P3P2/P1B2P2/8 w - - bm f4; id "arasan19.189"; c0 "Šachová skladba 2011-12, 1st Prize";
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Arasan 19.0 + updated test suite

Post by Vinvin »

Summary.

5 crazy hard positions for SF :
2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - bm f6; id "arasan19.41"; c0 "study by Smyslov";
8/4nk2/1p3p2/1r1p2pp/1P1R1N1P/6P1/3KPP2/8 w - - bm Nd3; id "arasan19.116"; c0 "Grandelius-Raznikov, EU Youth Chess Ch B18, Albena 2011";
r1b3kr/pp1n2Bp/2pb2q1/3p3N/3P4/2P2Q2/P1P3PP/4RRK1 w - - bm Re5; id "arasan19.124"; c0 "Orcrist-Crafty, ICC 2011";
1rr1b1k1/1pq1bp2/p2p1np1/4p3/P2BP3/2NB2Q1/1PP3PP/4RR1K w - - bm Rxf6; id "arasan19.134"; c0 "Glek-Lingnau, Dortmund op-A 1992";
4K1k1/8/1p5p/1Pp3b1/8/1P3P2/P1B2P2/8 w - - bm f4; id "arasan19.189"; c0 "Šachová skladba 2011-12, 1st Prize";
6 very hard positions for SF :
1r3rk1/3bbppp/1qn2P2/p2pP1P1/3P4/2PB1N2/6K1/qNBQ1R2 w - - bm Bxh7+; id "arasan19.96"; c0 "nick-Fritz 11, playchess.com 2011";
3q4/4k3/1p1b1p1r/p2Q4/3B1p1p/7P/1P4P1/3R3K w - - bm b4; id "arasan19.120"; c0 "Stockfish 021113-Naum 4.6, nTCEC - Stage 4 - Season 2 2013";
7k/3q1pp1/1p3r2/p1bP4/P1P2p2/1P2rNpP/2Q3P1/4RR1K b - - bm Rxf3; id "arasan19.122"; c0 "Darkraider (Stockfish 2.1.1JA)-Pastorale(Houdini 1.5a), playchess.com 2011";
r2q1r2/1b2bpkp/p3p1p1/2ppP1P1/7R/1PN1BQR1/1PP2P1P/4K3 w - - bm Qf6+; id "arasan19.132"; c0 "Asauskas-Malisauskas, Vilnius 2004";
r6k/N1Rb2bp/p2p1nr1/3Pp2q/1P2Pp1P/5N2/P3QBP1/4R1K1 b - - bm Bh3; id "arasan19.158"; c0 "Persson-Gerhardt, Simon Webb mem email 2007";
r1b3r1/5p1k/p1n2P1p/P1qpp1P1/1p1p4/3P2Q1/BPPB2P1/R4RK1 w - - bm Kf2; id "arasan19.179"; c0 "Efremov-Fischer, Danube/4 ICCF 2012";
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jdart
Posts: 4366
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Re: Arasan 19.0 + updated test suite

Post by jdart »

I have taken a somewhat unsystematic look at some of the more difficult or unclear ones:

I think this one:

r1q2k1r/ppp2ppp/4n3/3N4/2B5/3Q4/Pb3PPP/4RRK1 w - - bm Rxe6; id "arasan19.50"; c0 "Akopian-Ramaswamy, Gilbraltar Masters 2007";

is problematic because it looks like Re2 might be nearly as good as Rxe6 (but I am not sure).

This one:

8/4nk2/1p3p2/1r1p2pp/1P1R1N1P/6P1/3KPP2/8 w - - bm Nd3; id "arasan19.156"; c0 "Grandelius-Raznikov, EU Youth Chess Ch B18, Albena 2011";

is very hard but the solution is correct. Komodo just does not seem to see it but if you force Nd3 then all of a sudden it gives a big score

2r2rk1/1b2bppn/1qp1p2p/p5N1/PpBPP2P/1P6/1BQ2PP1/1K1R3R w - - bm f4; id "arasan19.75"; c0 "Goloschapov-Skatchkov, Moscow 2004";

f4 is good but I am not sure it beats out all the alternatives by a large margin.

8/3n4/1p1k1p2/p5p1/PP4P1/2B3K1/8/8 b - - bm b5; id "arasan19.136"; c0 "Spassky-Karpov, Leningrad cm(6) 1974";

In my testing so far Stockfish prefers axb4 but Komodo likes b5.

r4rk1/p1p3pp/1pPppn1q/1P1b1p2/P2Pn3/4PN2/1B2BPPP/R2Q1RK1 b - - bm Ng4; id "arasan19.152"; c0 "Korchnoi-Simagin, Soviet ch-27 Leningrad 1960";

This one also seems murky at first but I actually ran it overnight with Komodo and it appears Ng4 is best.

The endgame studies are hard but I don't think they are incorrect, but there is some chance they are. Engines have a real hard time with these (probably due to null move but maybe due to other pruning they do).

--Jon
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