New hard positions since January

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Dann Corbit
Posts: 12537
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: New hard positions since January

Post by Dann Corbit »

I have been sick (still not all the way better, got the flu). Anyway, here is the data I have for recent positions:

Code: Select all

1r3bk1/rnR2p1p/pp2pnp1/3p4/3P4/1P2PB1P/P2BNPP1/R5K1 w - - acd 51; bm a4; c1 "a4, g4, Nf4, and Rc6 have about the same score. Nc1 is also close"; c3 "a4"; id "midgames.210"; pm a4; pv a4 Ne8 Rc2 Nbd6 Rc6 a5 Nc3 Rc7 Rxc7 Nxc7 Be2 Bg7 Kf1 Rc8 Bd3 f5 Ne2 Nce8 Be1 Bh6 Rc1 Rxc1 Nxc1 Bf8 Ne2 Kf7 g4 Ne4 f3 N4f6 Kg2 h6 Nc1 Bd6 Be2 fxg4 hxg4 h5 gxh5 Nxh5 Bb5 Nc7 Bd3 g5 Be2 Ng7 e4 e5 dxe5 Bxe5 Nd3 Ke6 Nxe5;
7q/1Nn1rbnN/P1Q5/4r3/p5k1/P2pB1P1/3P2RK/8 w - - acd 41; acs 600; bm Qxa4+; c3 "Qxa4+"; ce 88; pm Qxa4+; pv Qxa4+ Bc4;
5r1k/6p1/p6p/8/Np4b1/8/PPPb3P/1K4Q1 w - - acd 44; acs 600; bm a3; c3 "a3"; ce 208; pm a3; pv a3 Be6;
r1b2rk1/3n1pb1/2p1p1p1/p5P1/Pp2B1NQ/1q4P1/2R2P2/3R2K1 w - - acd 69; acs 600; bm Rxd7; c3 "Rxd7"; ce 32734; pm Rxd7; pv Rxd7 Bxd7 Nf6+ Bxf6 gxf6 Qxa4 Kg2 Qa1 Qg5 Qxf6 Qxf6 e5 Rc1 Bh3+ Kxh3 Ra6 Rh1 c5 Qxa6 Kg7 Kg4 b3 Bd5 e4 Qd6 Re8 Bxf7 Rg8 Bxg8 Kxg8 Qf6 e3 Rh8+;
r5k1/1pp3p1/5n2/2Bn1p2/p2Pp2r/P3P3/1PQ2PKP/2R5 w - - acd 40; acs 779; bm Qc4; c3 "Qc4"; ce -49; pm Qc4; pv Qc4 Kf7 Rh1 g5 Qb5 Re8 Qxb7 f4 Bd6 Re6 Bb4 fxe3 fxe3 Nxe3+ Kf2 Ned5 Ke1 e3 Rf1 Rf4 Ba5 e2 Rxf4 Nxf4 Qf3 Ng4 Bd2 Nxh2 Qc3 Re3 Qxe3 Ng2+ Kxe2 Nxe3 Bxe3 Kf6 Bg1 Ng4 Kd2 Ke6 b3 axb3 a4 Nf6 Kc3 g4 Kxb3 Kd7 a5 g3 a6 Kc6 Kc4 Nd5 Kd3 Kb6 Ke4;
r2qkr2/1b1nb1pp/pp1BQ3/8/P1P3P1/8/4BP1P/R2R2K1 w q - acd 46; acs 900; bm c5; c0 "Looks drawish"; c1 "While c5 may win and has the best score, g3 also has a positive score a bit lower. Both b6 and Nf6+ only draw."; c3 "c5 g3"; ce 131; pm c5; pv c5 Rf6 Qg8+ Nf8 c6 Bxc6 Be5 Bd6 Bxd6 Rxd6 Bf3 Bxf3 Re1+;
r5k1/1ppn2p1/6r1/2Bn4/p2Ppp1P/P3Pb2/1PQ2PRP/6RK w - - acd 50; acs 900; bm h3 Qc4; c0 "Looks drawish at best"; c1 "pv Qc4 Nf6 h3 scores -100 at depth 46 and h3 fxe3 scores -60 at depth 50.  It seems likely that both moves lose."; c3 "h3 Qc4"; ce -60; pm h3 Qc4; pv h3 fxe3;
2b3r1/1p1p2pk/2nBp2p/2P1Ppq1/R7/4QBPP/5P2/5K2 w - - acd 54; acs 900; bm Qxg5; c0 "Komodo MC-Xiphos, CCC 8: Deep Dive 2019"; c1 "Qc3, Qe1, and Rf4 are drawish, with Qc3 being the best of the alternatives"; c3 "Qxg5"; ce 381; pm Qxg5; pv Qxg5 hxg5 Ke2 Kg6 Kd3 Rh8 Bg2 b5 cxb6 Bb7 Kd2 Ra8 Ra7 Rxa7 bxa7;
r3r1k1/1b1nbp1p/1qn1p3/1p1pPp2/p2P4/P2BNN2/1P1Q1BPP/R4RK1 w - - acd 40; acs 1000; bm Ng4; c3 "Ng4"; ce 338; pm Ng4; pv Ng4;
3q1rk1/pp1bpp1p/3p1bp1/8/3NP3/1P3P2/1KP1Q1PP/3R3R w - - acd 43; acs 1202; bm f4; c0 "It isn't clear if c3 or f4 is better (and they are very likely permuatations) and it is also not clear that either move can hold the draw)"; c3 "f4"; ce -116; pm f4; pv f4 Qc7 c3 Rc8 Rc1 a5 Rhd1 Qc5 g4 e5 fxe5 Qxe5 h3 Bg7 Qd3 Qe8 Ra1 a4 b4 b5 Rac1 Rc4 Qg3 Qe7 Qe3 h6 Kb1 Rc8 Qd3 Qe8 Rc2 Rc4 Qe3 Qe5 Qf3 Rc8 Qd3 Qe8 Kb2 Rc4 Kb1 Bxd4 cxd4 Rxb4+ Rb2 Rxb2+ Kxb2 b4 d5;
4q1kn/2Bp1p2/1N1PpPp1/1P2P1P1/2N3b1/6p1/1P4Pb/7K w - - acd 46; acs 1377; bm Na5; c3 "Na5"; ce 230; pm Na5; pv Na5 Be2 Nb7 Bc4 Nd8 Bxb5 b3 Qf8 Na4 Qh6 gxh6 g5 Nc3 Ng6 h7+ Kxh7 Nxf7 Kg8;
8/p4kpR/1n3p2/2n1p3/4P3/P3KP2/1P4PP/8 b - - acd 40; acs 1613; bm Kg8; c3 "Kg8"; ce 145; pm Kg8; pv Kg8 Rh3 Nc4+ Ke2 Nxb2 f4 Ne6 Rc3 exf4 Rc8+ Kh7 Kd2 a5 Rc6 Nd4 Rc8 Na4 Ke1 Nb3 Kf2 Nc5 Kf3;
5rk1/1pp3p1/8/2P5/p3Qn1P/P5KP/1P2pP2/8 w - - acd 41; acs 1652; bm Qe3; c3 "Qe3"; ce 0; pm Qe3; pv Qe3 Nh5+ Kh2 Nf4 f3 Rf6 Qe8+ Rf8 Qe7 Rf6 Qe8+;
r1bq1b1r/pp1pp1pp/2n1k3/8/4nQ2/N1p1BN1P/PP3PP1/R3K2R w KQ - acd 42; acs 1800; am Qxe4+; bm Nb5; c3 "Nb5"; ce 281; pm Nb5; pv Nb5 d6 Qxe4+ Kd7;
r2qrbk1/1b3pp1/pn3n1p/1P2N3/4P3/p6P/1BBN1PP1/R2QR1K1 w - - acd 47; acs 1800; bm Nxf7; c3 "Nxf7"; ce 0; pm Nxf7; pv Nxf7 Kxf7 Bb3+ Bd5 Bxf6 Bxb3 Qxb3+ Kxf6 Qf3+ Ke6 Qf5+ Ke7 e5 Qd5 Ne4 Qe6 Qf3 a2 Nc3 Rec8 Rxa2 Rxc3 Qxc3 Qxa2 Qc7+ Nd7 e6 Qd2 Kf1 Qd3+ Kg1;
rn2kbnr/pp3ppp/2p1p3/3pP2q/8/2NP1N1P/PP3PP1/R1BQ1RK1 w kq - acd 48; acs 1800; bm Ne2; c0 "Qb3 also has a good score"; c3 "Ne2"; ce 180; pm Ne2; pv Ne2 h6;
r7/pp2rk1Q/1npb4/8/2pP2R1/7P/PP3P2/2K5 b - - acd 46; acs 2000; bm Ke6; c3 "Ke6"; ce 121; pm Ke6; pv Ke6 Re4+;
q7/6pk/P2R1p2/4p2p/1B6/8/PNP4r/1KR5 b - - acd 48; acs 4560; bm h4; c0 "h4 and Rh3 are permutations.  I do not think either move can hold the draw"; c3 "h4"; ce -243; pm h4; pv h4 Bc5 Rh3;
8/pppr1kpp/8/8/8/5P2/PPP1RKPP/8 b - - acd 56; acs 4560; bm Rd1; c3 "Rd1"; ce 0; pm Rd1; pv Rd1 a4;
r3k3/p4pb1/2p3r1/4P1p1/2Np4/1P1N1P1p/P5PP/R5K1 w q - acd 64; acs 4560; bm f4; c3 "f4"; ce 0; pm f4; pv f4 gxf4 Nxf4 Rh6 Nxh3 f6;
4r1k1/6p1/p6p/3p1p2/b2P3P/5N2/PP1B1PP1/6K1 w - - acd 65; acs 4560; bm Ne5; c3 "Ne5"; ce 0; pm Ne5; pv Ne5 Rc8 Bc3 Kh7 Nd3 Bb5 Nc5 g5 hxg5 hxg5 a4 Bc4 Nd7 Kg6 Ne5+ Kf6 f3 f4 g3 fxg3 Kg2 Be2 Kxg3 Kf5 Ng4 Rh8 Ne3+ Ke6 Kf2 Rh2+ Kg3 Rh1 Kf2 Bd3 Kg3 Ra1 a5 Rb1 Kf2 Bb5 Kg2 Bc4 Kf2 Ra1 Bd2 Rh1 Ng4 Rf1+ Ke3 Kf5 Bc3 Bb5 Bd2 Rb1 Bc3 Rc1 Kd2 Rh1 Ke3 Rb1 Kf2 Ke6 Ne3 Bc6 Ng4 Rc1 Ke3 Bb5;
2kr3r/ppp3pp/5p2/3Pn3/Q5P1/2P1P3/P6P/5RK1 b - - acd 71; acs 4560; bm Kb8; c3 "Kb8"; ce 0; pm Kb8; pv Kb8 c4 h6 Qb3 c5 a4 Rhe8 a5 Re7 Rf4 Nf7 Qa3 Rc8 h4 Nd6 Kg2 Re5 Qd3 Rf8 h5 Re7 Qa3 Rc8 Qa4 Rce8 Kf1 Rc7 Qa3 Rcc8 Kg1 Re7 Kg2 Ree8 Kf1 Re7 Ke1 Ree8 Kd1 Re7 Kc2 Ree8 Qb3 Re7 Kd2 Rce8 Qa3 Rc7 Ke2 Rec8 Kf3 Re7 Qb3 Re5 Qa4 Re7 Ke2 Rce8 Qa3 Rc8 Kd3;
5rk1/p1r2p1p/6p1/3B4/2p1N3/P5P1/4PP1P/R5K1 b - - acd 72; acs 4560; bm c3; c3 "c3"; ce 0; pm c3; pv c3 Rc1 c2 Kf1 Rb8 Ke1 Kg7 Nd2 Rc3 Be4 Rb2 a4 Rc7 Bd3 Ra2 Ne4 Rxa4 Kd2 Rb4 Nc3 Rb3 Rxc2 Rc5 h4 f5 Nd1 Rxc2+ Bxc2 Rb8 Ne3 Rc8 Bd3 Rf8 Nc4 Rb8 Kc3 Kf6 Na5 Rc8+ Kd2 Rd8 Nb3 Rc8 Ba6 Rb8 Kc3 Rb6 Bc4 Rd6 Bd3 Rd8 e3 Rc8+ Kb2 Rb8 Bc2 Rc8 Nd4 Rb8+ Kc3 Rc8+ Kb4 Ke5 Bb3 Rc1 Ne2 Rf1;
rn3r2/p2qp1k1/2pp1pp1/7n/1p1PP1b1/2N2N2/PPPQB3/2KR3R w - - acd 47; acs 8465; bm Rdg1; c0 "http://talkchess.com/forum3/viewtopic.php?f=2&t=71187"; ce 700; pm Rdg1; pv Rdg1 bxc3 bxc3 Qe6 Nh4 Bxe2 Qxe2 Nf4 Qh2 Kf7 Qxf4 Ke8 Nxg6 Rg8 Rh7 Kd8 c4 Na6 Rg3 Rxg6 Rxg6 Nc7 c5 Qxa2 cxd6 Qa1+ Kd2;
rn2kr2/1pp1b1p1/4p3/1Pp1P2p/p1P1NP1P/P7/1B4P1/3RR1K1 w - - acd 62; acs 16213; bm g3; c0 "Nf6+"; c1 "Since b6 and Nf6+ both draw. I guess that the best move is g3."; c3 "g3"; ce 63; pm g3; pv g3 Nd7 Rc1 Nb6 Nf2 Rd8 Rc2 Kf7 Kg2 Kg6 Ree2 Rd7 Rc3 Nc8 Bc1 Rfd8 Be3 b6 Rcc2 Na7 Rb2 Kf7 Kf3 Bf8 f5 exf5 e6+ Kxe6 Bg5+ Kf7 Bxd8 Rxd8 Rbd2 Rd4 Rxd4 cxd4 Nh3 Be7 Ng5+ Bxg5 hxg5 Nc8 Rd2 g6 Kf4 Ke6 Rxd4 Nd6 c5 bxc5 Rxa4 Kd5 Ra8 Nxb5;
r1b1kbnr/pp3ppp/2p1p3/3pP2q/8/2NP1N1P/PP3PP1/R1BQ1RK1 w kq - acd 59; acs 21300; bm Ne2; c3 "Ne2"; ce 0; pm Ne2; pv Ne2 f6 a4 a5 Bd2 Qf7 Qe1 fxe5 Nxe5 Qc7 Nd4 Bd6 Nef3 Qe7 Qc1 Qc7;
1b2k1q1/4ppPp/1pK5/3pP3/3P4/1P6/8/2Q5 w - - acd 72; acs 25140; bm Qh6; c3 "Qh6"; ce 32534; dm 117; pm Qh6; pv Qh6 Kd8 Qg5 Ke8 Qf5 e6 Qf6 b5 b4 Ba7 Kc7 Bb6+ Kxb6 Kd7 Kxb5 h5 Ka4 h4 b5 h3 Qh6 Qa8+ Kb3 Qb8 Kb4 Qc8 Qxh3 Qc4+ Ka5 Qxd4 g8=Q Qa7+ Kb4 Qd4+ Kb3 Qd1+ Kb2 Qd2+ Ka3 Qa5+ Kb3 Qxb5+ Kc3 Qa5+ Kc2 Qa2+ Kd1 Qb1+ Ke2 Qc2+ Kf3 Qd3+ Kg4 Qf5+ Kh4 Qf4+ Qhg4 Qh2+ Kg5 Qxe5+ Kh6 Qf6+ Kh7 d4 Qg3 Qf5+ Kg7 Qg6+ Qxg6 fxg6 Kxg6 Kc6 Kf6 Kb5 Kxe6 Kb4 Qd8 d3 Qd4+ Kb3 Qxd3+ Kb4 Qe4+ Kb3 Qe3+ Kb4 Kd6 Ka4 Qd4+ Kb3 Qd3+ Kb2 Qd2+ Ka3;
r5k1/1ppq1bp1/2n4r/1BBn1p2/p1NPp2p/P3P1P1/1PQ2P1P/2R3RK b - - acd 64; acs 87156; bm Bh5; c0 "http://talkchess.com/forum3/viewtopic.php?f=2&t=69361&p=785396#p785396"; c1 "Qd8 is not as good."; c3 "Bh5"; ce 120; pm Bh5; pv Bh5 Ne5 Nxe5 Bxd7 Bf3+ Rg2 Nxd7 gxh4 N7f6 Kg1 Bxg2 Kxg2 Rxh4 Qc4 Kf7 Rh1 g5 Kf1 Rah8 Bb4 f4 exf4 gxf4 Bd2 c6 h3 Kg6 Qc5 e3 Qc2+ Kf7 fxe3 fxe3 Be1 Re4 Rh2 Rxd4 Qc5 Rf4+ Ke2 Re8 Qa7 Re7 Bg3 Rf5 Bd6 Rd7 Qb8 Ne4 Bf8 Rf6 Bb4 c5 Be1 Nf4+ Kxe3 Re7 Bh4 Ng5+ Kd2 Nf3+ Kc2 Nxh4 Rh1 Nf3 Qh8 Rd7 h4 Ke7 h5 Rd2+ Kb1 Nd3 Ka1 Rf7 Qb8 Rxb2 Qc7+ Ke6 Qc8+ Kd5 Qe8 Nfe5 h6 Rbf2 Qd8+ Kc6 Qe8+ Kc7 h7 Rf1+ Rxf1 Rxf1+ Ka2;
rnbq1rk1/p3bp2/2p1p1p1/1p1nP1P1/2pP1P2/2N5/PP4P1/RBBQK2R w KQ - acd 64; acs 246751; bm Bd2; c3 "Bd2"; ce 365; pm Bd2; pv Bd2 Qe8 Ne4 Nd7 Ng3 f5 gxf6 Rxf6 exf6 Bxf6 Qe2 Qf7 Ne4 Nf8 Nxf6+ Qxf6 Qe5 a5 Bc2 b4 Rh3 Ra7 O-O-O Rh7 Rxh7 Nxh7 Qb8 Qf8 Kb1 c3 Bc1 cxb2 Kxb2 Nf6 Bxg6 Bd7 Qa7 Qd8 g4 Be8 Bxe8 Nxe8 Rh1 Ng7 Ka1 Nc3 f5 Nb5 Qb7 exf5 Qxc6 Nc3 gxf5 Qd5 Qxd5+ Nxd5 Rf1 Kf7 Bg5 a4 Kb2 Ne8 Rc1 Nd6 Rc5 Nc3 Rc7+ Ke8 Re7+ Kf8 f6 Nf5 Ra7 a3+ Kb3 Nxd4+ Kc4 Nf5 Kxb4 Nxa2+ Kxa3 Nc3 Kb2;
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: New hard positions since January

Post by Vinvin »

Hi Dann,
About half of these positions are quite easy.
Stockfish_19082608 results on an i7@4*4GHz, 30 seconds per position, 2 runs :

Code: Select all

  1) a2-a4              Ne2-f4  * 4 Sec.   Ne2-f4  * 0 Sec.
  2) Qc6xa4             Qc6xa4  * 0 Sec.   Qc6xa4  * 0 Sec.
  3) a2-a3              a2-a3   * 0 Sec.   a2-a3   * 0 Sec.
  4) Rd1xd7             Ng4-h6   	   Ng4-f6   
  5) Qc2-c4             Qc2-c4  * 0 Sec.   Qc2-c4  * 0 Sec.
  6) c4-c5              g4-g5    	   g4-g5    
  7) h2-h3, Qc2-c4      Qc2-c4  * 5 Sec.   h2-h3   * 5 Sec.
  8) Qe3xg5             Qe3-c3   	   Qe3-c3   
  9) Ne3-g4             h2-h4    	   Bd3xf5   
 10) f3-f4              f3-f4   * 3 Sec.   c2-c3    
 11) Nc4-a5             Nc4-d2   	   Nc4-d2   
 12) .. Kf7-g8          Kf7-g8  * 5 Sec.   Kf7-g8  * 0 Sec.
 13) Qe4-e3             c5-c6    	   Kg3-g4   
 14) Na3-b5             Qf4xe4   	   Qf4xe4   
 15) Ne5xf7             Ne5xf7  * 0 Sec.   Ne5xf7  * 0 Sec.
 16) Nc3-e2             Nc3-e2  * 0 Sec.   Nc3-e2  * 0 Sec.
 17) .. Kf7-e6          Kf7-e6  * 0 Sec.   Kf7-e6  * 0 Sec.
 18) .. h5-h4,Rh2-h3    Rh2-h3  * 2 Sec.   h5-h4   * 0 Sec.
 19) .. Rd7-d1          Rd7-d1  * 1 Sec.   Rd7-d1  * 0 Sec.
 20) f3-f4              f3-f4   * 7 Sec.   f3-f4   * 0 Sec.
 21) Nf3-e5             Nf3-e5  * 0 Sec.   Nf3-e5  * 0 Sec.
 22) .. Kc8-b8          Kc8-b8  * 0 Sec.   Kc8-b8  * 0 Sec.
 23) .. c4-c3           c4-c3   * 0 Sec.   c4-c3   * 0 Sec.
 24) Rd1-g1             Nc3-a4             Rd1-g1  * 24 Sec.
 25) g2-g3              b5-b6    	   b5-b6    
 26) Nc3-e2             Bc1-e3   	   Nc3-e2  * 0 Sec.
 27) Qc1-h6             Kc6-b7   	   Kc6-b7   
 28) .. Bf7-h5          Qd7-e6   	   Bf7-h5  * 19 Sec.
 29) Bc1-d2, Bc1xc3     Qd1-f3   	   Qd1-g4
I'll check not found key moves.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: New hard positions since January

Post by Vinvin »

There still 12 positions after delete too easy and not good positions :

Code: Select all

   4) Rd1xd7             Ng4-h6   	    Ng4-f6   		r1b2rk1/3n1pb1/2p1p1p1/p5P1/Pp2B1NQ/1q4P1/2R2P2/3R2K1 w - - acd 69; acs 600; bm Rxd7; c3 "Rxd7"; ce 32734; pm Rxd7; pv Rxd7 Bxd7 Nf6+ Bxf6 gxf6 Qxa4 Kg2 Qa1 Qg5 Qxf6 Qxf6 e5 Rc1 Bh3+ Kxh3 Ra6 Rh1 c5 Qxa6 Kg7 Kg4 b3 Bd5 e4 Qd6 Re8 Bxf7 Rg8 Bxg8 Kxg8 Qf6 e3 Rh8+;
   8) Qe3xg5             Qe3-c3   	    Qe3-c3   		2b3r1/1p1p2pk/2nBp2p/2P1Ppq1/R7/4QBPP/5P2/5K2 w - - acd 54; acs 900; bm Qxg5; c0 "Komodo MC-Xiphos, CCC 8: Deep Dive 2019"; c1 "Qc3, Qe1, and Rf4 are drawish, with Qc3 being the best of the alternatives"; c3 "Qxg5"; ce 381; pm Qxg5; pv Qxg5 hxg5 Ke2 Kg6 Kd3 Rh8 Bg2 b5 cxb6 Bb7 Kd2 Ra8 Ra7 Rxa7 bxa7;
   9) Ne3-g4             h2-h4    	    Bd3xf5   		r3r1k1/1b1nbp1p/1qn1p3/1p1pPp2/p2P4/P2BNN2/1P1Q1BPP/R4RK1 w - - acd 40; acs 1000; bm Ng4; c3 "Ng4"; ce 338; pm Ng4; pv Ng4;
  11) Nc4-a5             Nc4-d2   	    Nc4-d2   		4q1kn/2Bp1p2/1N1PpPp1/1P2P1P1/2N3b1/6p1/1P4Pb/7K w - - acd 46; acs 1377; bm Na5; c3 "Na5"; ce 230; pm Na5; pv Na5 Be2 Nb7 Bc4 Nd8 Bxb5 b3 Qf8 Na4 Qh6 gxh6 g5 Nc3 Ng6 h7+ Kxh7 Nxf7 Kg8;
  13) Qe4-e3             c5-c6    	    Kg3-g4   		5rk1/1pp3p1/8/2P5/p3Qn1P/P5KP/1P2pP2/8 w - - acd 41; acs 1652; bm Qe3; c3 "Qe3"; ce 0; pm Qe3; pv Qe3 Nh5+ Kh2 Nf4 f3 Rf6 Qe8+ Rf8 Qe7 Rf6 Qe8+;
  14) Na3-b5             Qf4xe4   	    Qf4xe4   		r1bq1b1r/pp1pp1pp/2n1k3/8/4nQ2/N1p1BN1P/PP3PP1/R3K2R w KQ - acd 42; acs 1800; am Qxe4+; bm Nb5; c3 "Nb5"; ce 281; pm Nb5; pv Nb5 d6 Qxe4+ Kd7;
  24) Rd1-g1             Nc3-a4   	    Rd1-g1  * 24 Sec.	rn3r2/p2qp1k1/2pp1pp1/7n/1p1PP1b1/2N2N2/PPPQB3/2KR3R w - - acd 47; acs 8465; bm Rdg1; c0 "http://talkchess.com/forum3/viewtopic.php?f=2&t=71187"; ce 700; pm Rdg1; pv Rdg1 bxc3 bxc3 Qe6 Nh4 Bxe2 Qxe2 Nf4 Qh2 Kf7 Qxf4 Ke8 Nxg6 Rg8 Rh7 Kd8 c4 Na6 Rg3 Rxg6 Rxg6 Nc7 c5 Qxa2 cxd6 Qa1+ Kd2;
  25) g2-g3              b5-b6    	    b5-b6    		rn2kr2/1pp1b1p1/4p3/1Pp1P2p/p1P1NP1P/P7/1B4P1/3RR1K1 w - - acd 62; acs 16213; bm g3; c0 "Nf6+"; c1 "Since b6 and Nf6+ both draw. I guess that the best move is g3."; c3 "g3"; ce 63; pm g3; pv g3 Nd7 Rc1 Nb6 Nf2 Rd8 Rc2 Kf7 Kg2 Kg6 Ree2 Rd7 Rc3 Nc8 Bc1 Rfd8 Be3 b6 Rcc2 Na7 Rb2 Kf7 Kf3 Bf8 f5 exf5 e6+ Kxe6 Bg5+ Kf7 Bxd8 Rxd8 Rbd2 Rd4 Rxd4 cxd4 Nh3 Be7 Ng5+ Bxg5 hxg5 Nc8 Rd2 g6 Kf4 Ke6 Rxd4 Nd6 c5 bxc5 Rxa4 Kd5 Ra8 Nxb5;
  26) Nc3-e2             Bc1-e3   	    Nc3-e2  * 0 Sec.	r1b1kbnr/pp3ppp/2p1p3/3pP2q/8/2NP1N1P/PP3PP1/R1BQ1RK1 w kq - acd 59; acs 21300; bm Ne2; c3 "Ne2"; ce 0; pm Ne2; pv Ne2 f6 a4 a5 Bd2 Qf7 Qe1 fxe5 Nxe5 Qc7 Nd4 Bd6 Nef3 Qe7 Qc1 Qc7;
  27) Qc1-h6             Kc6-b7   	    Kc6-b7   		1b2k1q1/4ppPp/1pK5/3pP3/3P4/1P6/8/2Q5 w - - acd 72; acs 25140; bm Qh6; c3 "Qh6"; ce 32534; dm 117; pm Qh6; pv Qh6 Kd8 Qg5 Ke8 Qf5 e6 Qf6 b5 b4 Ba7 Kc7 Bb6+ Kxb6 Kd7 Kxb5 h5 Ka4 h4 b5 h3 Qh6 Qa8+ Kb3 Qb8 Kb4 Qc8 Qxh3 Qc4+ Ka5 Qxd4 g8=Q Qa7+ Kb4 Qd4+ Kb3 Qd1+ Kb2 Qd2+ Ka3 Qa5+ Kb3 Qxb5+ Kc3 Qa5+ Kc2 Qa2+ Kd1 Qb1+ Ke2 Qc2+ Kf3 Qd3+ Kg4 Qf5+ Kh4 Qf4+ Qhg4 Qh2+ Kg5 Qxe5+ Kh6 Qf6+ Kh7 d4 Qg3 Qf5+ Kg7 Qg6+ Qxg6 fxg6 Kxg6 Kc6 Kf6 Kb5 Kxe6 Kb4 Qd8 d3 Qd4+ Kb3 Qxd3+ Kb4 Qe4+ Kb3 Qe3+ Kb4 Kd6 Ka4 Qd4+ Kb3 Qd3+ Kb2 Qd2+ Ka3;
  28) .. Bf7-h5          Qd7-e6   	    Bf7-h5  * 19 Sec.	r5k1/1ppq1bp1/2n4r/1BBn1p2/p1NPp2p/P3P1P1/1PQ2P1P/2R3RK b - - acd 64; acs 87156; bm Bh5; c0 "http://talkchess.com/forum3/viewtopic.php?f=2&t=69361&p=785396#p785396"; c1 "Qd8 is not as good."; c3 "Bh5"; ce 120; pm Bh5; pv Bh5 Ne5 Nxe5 Bxd7 Bf3+ Rg2 Nxd7 gxh4 N7f6 Kg1 Bxg2 Kxg2 Rxh4 Qc4 Kf7 Rh1 g5 Kf1 Rah8 Bb4 f4 exf4 gxf4 Bd2 c6 h3 Kg6 Qc5 e3 Qc2+ Kf7 fxe3 fxe3 Be1 Re4 Rh2 Rxd4 Qc5 Rf4+ Ke2 Re8 Qa7 Re7 Bg3 Rf5 Bd6 Rd7 Qb8 Ne4 Bf8 Rf6 Bb4 c5 Be1 Nf4+ Kxe3 Re7 Bh4 Ng5+ Kd2 Nf3+ Kc2 Nxh4 Rh1 Nf3 Qh8 Rd7 h4 Ke7 h5 Rd2+ Kb1 Nd3 Ka1 Rf7 Qb8 Rxb2 Qc7+ Ke6 Qc8+ Kd5 Qe8 Nfe5 h6 Rbf2 Qd8+ Kc6 Qe8+ Kc7 h7 Rf1+ Rxf1 Rxf1+ Ka2;
  29) Bc1-d2, Bc1xc3     Qd1-f3   	    Qd1-g4  		rnbq1rk1/p3bp2/2p1p1p1/1p1nP1P1/2pP1P2/2N5/PP4P1/RBBQK2R w KQ - acd 64; acs 246751; bm Bd2; c3 "Bd2"; ce 365; pm Bd2; pv Bd2 Qe8 Ne4 Nd7 Ng3 f5 gxf6 Rxf6 exf6 Bxf6 Qe2 Qf7 Ne4 Nf8 Nxf6+ Qxf6 Qe5 a5 Bc2 b4 Rh3 Ra7 O-O-O Rh7 Rxh7 Nxh7 Qb8 Qf8 Kb1 c3 Bc1 cxb2 Kxb2 Nf6 Bxg6 Bd7 Qa7 Qd8 g4 Be8 Bxe8 Nxe8 Rh1 Ng7 Ka1 Nc3 f5 Nb5 Qb7 exf5 Qxc6 Nc3 gxf5 Qd5 Qxd5+ Nxd5 Rf1 Kf7 Bg5 a4 Kb2 Ne8 Rc1 Nd6 Rc5 Nc3 Rc7+ Ke8 Re7+ Kf8 f6 Nf5 Ra7 a3+ Kb3 Nxd4+ Kc4 Nf5 Kxb4 Nxa2+ Kxa3 Nc3 Kb2;
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: New hard positions since January

Post by Vinvin »

After one more check, 3 positions removed

Not good test positions :
Other moves has the same eval=0.00
13) Qe4-e3 c5-c6 Kg3-g4 5rk1/1pp3p1/8/2P5/p3Qn1P/P5KP/1P2pP2/8 w - - acd 41; acs 1652; bm Qe3; c3 "Qe3"; ce 0; pm Qe3; pv Qe3 Nh5+ Kh2 Nf4 f3 Rf6 Qe8+ Rf8 Qe7 Rf6 Qe8+;

Often found by luck because eval=0.00
26) Nc3-e2 Bc1-e3 Nc3-e2 * 0 Sec. r1b1kbnr/pp3ppp/2p1p3/3pP2q/8/2NP1N1P/PP3PP1/R1BQ1RK1 w kq - acd 59; acs 21300; bm Ne2; c3 "Ne2"; ce 0; pm Ne2; pv Ne2 f6 a4 a5 Bd2 Qf7 Qe1 fxe5 Nxe5 Qc7 Nd4 Bd6 Nef3 Qe7 Qc1 Qc7;
28) .. Bf7-h5 Qd7-e6 Bf7-h5 * 19 Sec. r5k1/1ppq1bp1/2n4r/1BBn1p2/p1NPp2p/P3P1P1/1PQ2P1P/2R3RK b - - acd 64; acs 87156; bm Bh5; c0 "viewtopic.php?f=2&t=69361&p=785396#p785396"; c1 "Qd8 is not as good."; c3 "Bh5"; ce 120; pm Bh5; pv Bh5 Ne5 Nxe5 Bxd7...;

It still 9 interesting positions to test engines :

Code: Select all

   4) Rd1xd7             Ng4-h6   	    Ng4-f6   		r1b2rk1/3n1pb1/2p1p1p1/p5P1/Pp2B1NQ/1q4P1/2R2P2/3R2K1 w - - acd 69; acs 600; bm Rxd7; c3 "Rxd7"; ce 32734; pm Rxd7; pv Rxd7 Bxd7 Nf6+ Bxf6 gxf6 Qxa4 Kg2 Qa1 Qg5 Qxf6 Qxf6 e5 Rc1 Bh3+ Kxh3 Ra6 Rh1 c5 Qxa6 Kg7 Kg4 b3 Bd5 e4 Qd6 Re8 Bxf7 Rg8 Bxg8 Kxg8 Qf6 e3 Rh8+;
   8) Qe3xg5             Qe3-c3   	    Qe3-c3   		2b3r1/1p1p2pk/2nBp2p/2P1Ppq1/R7/4QBPP/5P2/5K2 w - - acd 54; acs 900; bm Qxg5; c0 "Komodo MC-Xiphos, CCC 8: Deep Dive 2019"; c1 "Qc3, Qe1, and Rf4 are drawish, with Qc3 being the best of the alternatives"; c3 "Qxg5"; ce 381; pm Qxg5; pv Qxg5 hxg5 Ke2 Kg6 Kd3 Rh8 Bg2 b5 cxb6 Bb7 Kd2 Ra8 Ra7 Rxa7 bxa7;
   9) Ne3-g4             h2-h4    	    Bd3xf5   		r3r1k1/1b1nbp1p/1qn1p3/1p1pPp2/p2P4/P2BNN2/1P1Q1BPP/R4RK1 w - - acd 40; acs 1000; bm Ng4; c3 "Ng4"; ce 338; pm Ng4; pv Ng4;
  11) Nc4-a5             Nc4-d2   	    Nc4-d2   		4q1kn/2Bp1p2/1N1PpPp1/1P2P1P1/2N3b1/6p1/1P4Pb/7K w - - acd 46; acs 1377; bm Na5; c3 "Na5"; ce 230; pm Na5; pv Na5 Be2 Nb7 Bc4 Nd8 Bxb5 b3 Qf8 Na4 Qh6 gxh6 g5 Nc3 Ng6 h7+ Kxh7 Nxf7 Kg8;
  14) Na3-b5             Qf4xe4   	    Qf4xe4   		r1bq1b1r/pp1pp1pp/2n1k3/8/4nQ2/N1p1BN1P/PP3PP1/R3K2R w KQ - acd 42; acs 1800; am Qxe4+; bm Nb5; c3 "Nb5"; ce 281; pm Nb5; pv Nb5 d6 Qxe4+ Kd7;
  24) Rd1-g1             Nc3-a4   	    Rd1-g1  * 24 Sec.	rn3r2/p2qp1k1/2pp1pp1/7n/1p1PP1b1/2N2N2/PPPQB3/2KR3R w - - acd 47; acs 8465; bm Rdg1; c0 "http://talkchess.com/forum3/viewtopic.php?f=2&t=71187"; ce 700; pm Rdg1; pv Rdg1 bxc3 bxc3 Qe6 Nh4 Bxe2 Qxe2 Nf4 Qh2 Kf7 Qxf4 Ke8 Nxg6 Rg8 Rh7 Kd8 c4 Na6 Rg3 Rxg6 Rxg6 Nc7 c5 Qxa2 cxd6 Qa1+ Kd2;
  25) g2-g3              b5-b6    	    b5-b6    		rn2kr2/1pp1b1p1/4p3/1Pp1P2p/p1P1NP1P/P7/1B4P1/3RR1K1 w - - acd 62; acs 16213; bm g3; c0 "Nf6+"; c1 "Since b6 and Nf6+ both draw. I guess that the best move is g3."; c3 "g3"; ce 63; pm g3; pv g3 Nd7 Rc1 Nb6 Nf2 Rd8 Rc2 Kf7 Kg2 Kg6 Ree2 Rd7 Rc3 Nc8 Bc1 Rfd8 Be3 b6 Rcc2 Na7 Rb2 Kf7 Kf3 Bf8 f5 exf5 e6+ Kxe6 Bg5+ Kf7 Bxd8 Rxd8 Rbd2 Rd4 Rxd4 cxd4 Nh3 Be7 Ng5+ Bxg5 hxg5 Nc8 Rd2 g6 Kf4 Ke6 Rxd4 Nd6 c5 bxc5 Rxa4 Kd5 Ra8 Nxb5;
  27) Qc1-h6             Kc6-b7   	    Kc6-b7   		1b2k1q1/4ppPp/1pK5/3pP3/3P4/1P6/8/2Q5 w - - acd 72; acs 25140; bm Qh6; c3 "Qh6"; ce 32534; dm 117; pm Qh6; pv Qh6 Kd8 Qg5 Ke8 Qf5 e6 Qf6 b5 b4 Ba7 Kc7 Bb6+ Kxb6 Kd7 Kxb5 h5 Ka4 h4 b5 h3 Qh6 Qa8+ Kb3 Qb8 Kb4 Qc8 Qxh3 Qc4+ Ka5 Qxd4 g8=Q Qa7+ Kb4 Qd4+ Kb3 Qd1+ Kb2 Qd2+ Ka3 Qa5+ Kb3 Qxb5+ Kc3 Qa5+ Kc2 Qa2+ Kd1 Qb1+ Ke2 Qc2+ Kf3 Qd3+ Kg4 Qf5+ Kh4 Qf4+ Qhg4 Qh2+ Kg5 Qxe5+ Kh6 Qf6+ Kh7 d4 Qg3 Qf5+ Kg7 Qg6+ Qxg6 fxg6 Kxg6 Kc6 Kf6 Kb5 Kxe6 Kb4 Qd8 d3 Qd4+ Kb3 Qxd3+ Kb4 Qe4+ Kb3 Qe3+ Kb4 Kd6 Ka4 Qd4+ Kb3 Qd3+ Kb2 Qd2+ Ka3;
  29) Bc1-d2		 Qd1-f3   	    Qd1-g4  		rnbq1rk1/p3bp2/2p1p1p1/1p1nP1P1/2pP1P2/2N5/PP4P1/RBBQK2R w KQ - acd 64; acs 246751; bm Bd2; c3 "Bd2"; ce 365; pm Bd2; pv Bd2 Qe8 Ne4 Nd7 Ng3 f5 gxf6 Rxf6 exf6 Bxf6 Qe2 Qf7 Ne4 Nf8 Nxf6+ Qxf6 Qe5 a5 Bc2 b4 Rh3 Ra7 O-O-O Rh7 Rxh7 Nxh7 Qb8 Qf8 Kb1 c3 Bc1 cxb2 Kxb2 Nf6 Bxg6 Bd7 Qa7 Qd8 g4 Be8 Bxe8 Nxe8 Rh1 Ng7 Ka1 Nc3 f5 Nb5 Qb7 exf5 Qxc6 Nc3 gxf5 Qd5 Qxd5+ Nxd5 Rf1 Kf7 Bg5 a4 Kb2 Ne8 Rc1 Nd6 Rc5 Nc3 Rc7+ Ke8 Re7+ Kf8 f6 Nf5 Ra7 a3+ Kb3 Nxd4+ Kc4 Nf5 Kxb4 Nxa2+ Kxa3 Nc3 Kb2;
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: New hard positions since January

Post by Vinvin »

I added recent positions.
19 positions from January :

Code: Select all

1b2k1q1/4ppPp/1pK5/3pP3/3P4/1P6/8/2Q5 w - - bm Qh6;                         
1rbq1rk1/1p2ppbn/p2p2p1/P1pP4/4P3/2PB1N2/2P3PP/R1B1QRK1 w - - bm e5;
2b3r1/1p1p2pk/2nBp2p/2P1Ppq1/R7/4QBPP/5P2/5K2 w - - bm Qxg5;                
3b2n1/1q3p1k/6pp/np2N3/2bBPN2/1pP4P/4QPP1/1B4K1 w - - bm Nexg6;
4knQ1/7r/3p2p1/2bP1pP1/5P1N/6K1/8/8 b - - bm Rxh4;
4q1kn/2Bp1p2/1N1PpPp1/1P2P1P1/2N3b1/6p1/1P4Pb/7K w - - bm Na5;              
6rk/1b4rp/1pp2bpn/p2pNq2/3P1P1P/1P2PB2/PB4RQ/5R1K w - - bm e4;
q1r1k2r/1b3pp1/p3pn2/P1b5/1pN1P2p/3B1P2/1P2Q1PP/R1B2R1K b k - bm Nh5;
r1b2rk1/3n1pb1/2p1p1p1/p5P1/Pp2B1NQ/1q4P1/2R2P2/3R2K1 w - - bm Rxd7;        
r1b2rk1/pp3ppp/1n2p3/3pP3/2P2B2/b1PB1qP1/P1Q1NP1P/1K1R3R w - - bm Nd4;
r1bq1b1r/pp1pp1pp/2n1k3/8/4nQ2/N1p1BN1P/PP3PP1/R3K2R w KQ - bm Nb5;         
r3r1k1/1b1nbp1p/1qn1p3/1p1pPp2/p2P4/P2BNN2/1P1Q1BPP/R4RK1 w - - bm Ng4;     
r3r1k1/pp1q1p2/2p2npb/PPPp1bnp/3PpN2/2N1P1PP/1R1B1PBK/3Q1R2 b - - bm Bg4;
r4rk1/1bq1bppp/p1npp3/2nB1NP1/1p2P3/2N1B3/PPP1QP1P/2KR2R1 w - - bm Qh5;
r7/1q1r1p1k/3p1Qpp/pbpP4/1nB1P1P1/1P3NBP/5P1K/4R3 w - - bm Bf4;
rn2kr2/1pp1b1p1/4p3/1Pp1P2p/p1P1NP1P/P7/1B4P1/3RR1K1 w - - bm g3;           
rn3r2/p2qp1k1/2pp1pp1/7n/1p1PP1b1/2N2N2/PPPQB3/2KR3R w - - bm Rdg1;         
rnb2r2/3pppkp/p5p1/qPpQ4/P1P1n3/4PN2/4KPPP/RN3B1R b - - bm Nd6; 
rnbq1rk1/p3bp2/2p1p1p1/1p1nP1P1/2pP1P2/2N5/PP4P1/RBBQK2R w KQ - bm Bd2;
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Paloma
Posts: 1167
Joined: Thu Dec 25, 2008 9:07 pm
Full name: Herbert L

Re: New hard positions since January

Post by Paloma »

Thanks Vincent for your work.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: New hard positions since January

Post by Vinvin »

Vinvin wrote: ↑Wed Aug 28, 2019 11:57 pm I added recent positions.
19 positions from January :

Code: Select all

1b2k1q1/4ppPp/1pK5/3pP3/3P4/1P6/8/2Q5 w - - bm Qh6;                         
1rbq1rk1/1p2ppbn/p2p2p1/P1pP4/4P3/2PB1N2/2P3PP/R1B1QRK1 w - - bm e5;
2b3r1/1p1p2pk/2nBp2p/2P1Ppq1/R7/4QBPP/5P2/5K2 w - - bm Qxg5;                
3b2n1/1q3p1k/6pp/np2N3/2bBPN2/1pP4P/4QPP1/1B4K1 w - - bm Nexg6;
4knQ1/7r/3p2p1/2bP1pP1/5P1N/6K1/8/8 b - - bm Rxh4;
4q1kn/2Bp1p2/1N1PpPp1/1P2P1P1/2N3b1/6p1/1P4Pb/7K w - - bm Na5;              
6rk/1b4rp/1pp2bpn/p2pNq2/3P1P1P/1P2PB2/PB4RQ/5R1K w - - bm e4;
q1r1k2r/1b3pp1/p3pn2/P1b5/1pN1P2p/3B1P2/1P2Q1PP/R1B2R1K b k - bm Nh5;
r1b2rk1/3n1pb1/2p1p1p1/p5P1/Pp2B1NQ/1q4P1/2R2P2/3R2K1 w - - bm Rxd7;        
r1b2rk1/pp3ppp/1n2p3/3pP3/2P2B2/b1PB1qP1/P1Q1NP1P/1K1R3R w - - bm Nd4;
r1bq1b1r/pp1pp1pp/2n1k3/8/4nQ2/N1p1BN1P/PP3PP1/R3K2R w KQ - bm Nb5;         
r3r1k1/1b1nbp1p/1qn1p3/1p1pPp2/p2P4/P2BNN2/1P1Q1BPP/R4RK1 w - - bm Ng4;     
r3r1k1/pp1q1p2/2p2npb/PPPp1bnp/3PpN2/2N1P1PP/1R1B1PBK/3Q1R2 b - - bm Bg4;
r4rk1/1bq1bppp/p1npp3/2nB1NP1/1p2P3/2N1B3/PPP1QP1P/2KR2R1 w - - bm Qh5;
r7/1q1r1p1k/3p1Qpp/pbpP4/1nB1P1P1/1P3NBP/5P1K/4R3 w - - bm Bf4;
rn2kr2/1pp1b1p1/4p3/1Pp1P2p/p1P1NP1P/P7/1B4P1/3RR1K1 w - - bm g3;           
rn3r2/p2qp1k1/2pp1pp1/7n/1p1PP1b1/2N2N2/PPPQB3/2KR3R w - - bm Rdg1;         
rnb2r2/3pppkp/p5p1/qPpQ4/P1P1n3/4PN2/4KPPP/RN3B1R b - - bm Nd6; 
rnbq1rk1/p3bp2/2p1p1p1/1p1nP1P1/2pP1P2/2N5/PP4P1/RBBQK2R w KQ - bm Bd2;
4 runs on an i7-4*4GHz, 300 sec per position, 5 pcs Syzygy. Stockfish_19082608.
Key moves found : 7, 8, 8 and 8.
10 different key moves found on 19.

Code: Select all

  1) Qc1-h6         Kc6-b7   	    Kc6-b7   	   Qc1-h6  * 239   Qc1-h6  * 12 
  2) e4-e5          e4-e5   * 102   e4-e5   * 55   e4-e5   * 32    e4-e5   * 37 
  3) Qe3xg5         Qe3-c3   	    Qe3-c3   	   Qe3xg5  * 183   Qe3-c3   
  4) Ne5xg6         Ne5xc4   	    Ne5xc4   	   Ne5xc4   	   Ne5xc4   
  5) .. Rh7xh4      Bc5-f2   	    Bc5-f2   	   Bc5-f2   	   Bc5-f2   
  6) Nc4-a5         Nc4-d2   	    Nc4-a5  * 183  b2-b4    	   Nc4-d2   
  7) e3-e4          e3-e4   * 5     e3-e4   * 6    e3-e4   * 8 	   e3-e4   * 19 
  8) .. Nf6-h5      Nf6-h5  * 102   Nf6-h5  * 76   Nf6-h5  * 141   Nf6-h5  * 57 
  9) Rd1xd7         Rd1xd7  * 135   Rd1xd7  * 127  Rd1xd7  * 32    Rd1xd7  * 67 
 10) Ne2-d4         c4xd5    	    c4xd5    	   c4xd5    	   c4xd5    
 11) Na3-b5         Qf4xe4   	    Qf4xe4   	   Qf4xe4   	   Qf4xe4   
 12) Ne3-g4         Kg1-h1   	    Kg1-h1   	   Ra1-e1   	   Kg1-h1   
 13) .. Bf5-g4      a7-a6    	    a7-a6    	   a7-a6    	   Ng5-f3   
 14) Qe2-h5         Nf5xe7   	    Bd5xc6   	   Bd5xc6   	   Bd5xc6   
 15) Bg3-f4         Nf3-d2   	    Nf3-d2   	   Nf3-d2   	   Nf3-d2   
 16) g2-g3          g2-g3   * 93    g2-g3   * 203  b5-b6    	   g2-g3   * 36 
 17) Rd1-g1         Rd1-g1  * 42    Rd1-g1  * 93   Rd1-g1  * 14    Rd1-g1  * 50 
 18) .. Ne4-d6      Ne4-d6  * 22    Ne4-d6  * 137  Ne4-d6  * 100   Ne4-d6  * 94 
 19) Bc1-d2         Nc3xd5   	    Nc3xd5   	   Nc3xd5  	   Qd1-f3
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: New hard positions since January

Post by Vinvin »

I'll probably add this one, a bit funny and SF is slow for it :-)

[d]8/p7/qkpN1p2/8/1B1P4/PP3K2/5P2/8 w - - bm Ba5+;
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