Study of the Year 2012 (from chessbase.com)

[Vinvin]

from : http://en.chessbase.com/post/yochanan-a ... -year-2012
About all studies are solved by SF with correct score in a couple of seconds.

Only one study is badly evaluated by Stockfish (version syzygy_14020920) :
[d]1k6/pN2pp2/r3r3/2R4B/Rp6/p7/7p/7K w - -
Na5 is winning but SF evaluated as draw because it have problem to find Rbc4!! here :
[d]1k6/p3pp2/rr6/N1R4B/1R6/pp6/7p/7K w - -
3. Rbc4!! Rxa5 4. Rc8+ Kb7 5. R8c7+ Ka6 6.Be2!! a2 7. Bf1!!

All the studies :
[pgn]
[Event "3-4th place, Moscow Championship"]
[Site "?"]
[Date "2012.??.??"]
[Round "?"]
[White "Osintsev, Sergey"]
[Black "White to play and win"]
[Result "1-0"]
[SetUp "1"]
[FEN "k7/b2p4/7P/1N4QB/8/7q/K1p5/3n4 w - - 0 1"]
[PlyCount "27"]
[EventDate "2012.??.??"]

1. h7 (1. Qd5+ $2 Kb8 2.
Qe5+ Kb7 3. Qc7+ Ka6 4. Be2 Qe6+ 5. Bc4 Qb6 6. Nd4+ Ka5 7. Qxb6+ Kxb6
8. Nxc2 Bb8 $11) (1. Qd8+ $2 Bb8 2. Qf6 Nc3+ 3. Nxc3 Qxh5 4. Qa6+ Ba7
5. Kb2 Qd1 $11) 1... Qe6+ 2. Ka3 Qe7+ $1 (2... Qc6 3. h8=Q+ Kb7 4. Qc8+
$1 Qxc8 5. Nd6+ $18) 3. Qxe7 c1=Q+ 4. Ka4 $1 ({Thematic try} 4. Kb3 $2
Qb1+ $1 5. Ka4 Nb2+ 6. Ka5 (6. Kb4 Nd3+ 7. Ka5 Qa2+ 8. Qa3 Qxa3+ 9. Nxa3
Bd4 $11) 6... Qa2+ 7. Qa3 Qxa3+ 8. Nxa3 Bd4 $13) (4. Kb4 $2 Qd2+ $1 5.
Ka4 Nb2+ $1 6. Kb3 Qd5+ $1 7. Kxb2 Qxb5+ 8. Kc3 Qc6+ 9. Kd3 Qd5+ $11)
4... Nb2+ 5. Ka5 (5. Kb3 $2 Qc4+ 6. Kxb2 Qxb5+ $11) 5... Nc4+ (5... Qa1+
6. Na3 $18) 6. Ka6 (6. Kb4 $2 Qb2+ 7. Kxc4 d5+ $1 8. Kxd5 Qxb5+ $11) 6...
Qh6+ 7. Nd6 Nxd6 8. Qg5 $3 (8. Bf3+ $2 Ne4+ 9. Ka5 Bb6+ $19) (8. Bg6 $2
Qxg6 9. h8=Q+ Nc8+ $11) 8... Qxg5 ( 8... Qe6 9. Qg8+ $1 Nc8+ 10. Qxe6
$18) (8... Qxh7 9. Qd8+ Bb8 10. Bf3+ Ne4 11. Qb6 $18) 9. h8=Q+ Bb8 10.
Bf3+ Ne4 11. Bxe4+ d5 12. Qg7 $3 Qxg7 13. Bxd5+ Qb7+ 14. Bxb7# 1-0

[Event "Study of the Year "]
[Site "?"]
[Date "2012.??.??"]
[Round "?"]
[White "Afek, Yochanan"]
[Black "White to play and win"]
[Result "1-0"]
[SetUp "1"]
[FEN "1kn2B2/2R1RP2/2P5/7r/8/1P1p2q1/K7/2N5 w - - 0 1"]
[PlyCount "33"]
[EventDate "2012.09.11"]

1. Rb7+ (1. Rxc8+ $2
Kxc8 2. Re8+ Kc7 3. Bd6+ Qxd6 4. f8=Q Qxf8 (4... Rh2+ 5. Kb1 Qxf8 6.
Rxf8 d2 7. Rf1 dxc1=Q+ 8. Rxc1 Rh6 $11) 5. Rxf8 d2 6. Rf1 dxc1=Q 7.
Rxc1 Ra5+ $1 8. Kb2 Ra6 $11) 1... Ka8 2. Ra7+ $3 Nxa7 3. Re8+ Nc8 4.
Rxc8+ Ka7 5. Bc5+ $1 Rxc5 6. Ra8+ $3 (6. f8=Q $2 Qg2+ 7. Ka3 Ra5+ 8.
Kb4 Qd2+ 9. Kc4 Qxc1+ $11 {with perpetual check}) 6... Kxa8 7. f8=Q+
Qb8 8. Qxc5 d2 9. c7 (9. Qa5+ $4 Qa7 $19) 9... dxc1=N+ $1 {A new black
knight is born on the square where his white counterpart was captured...}
10. Kb1 $1 (10. Qxc1 $2 Qxc7 $1 11. Qxc7 $11) 10... Qc8 $1 (10... Qxb3+
11. Kxc1 $18) 11. Qc6+ Ka7 12. Kxc1 Qh3 $1 13. c8=N+ $1 {and a new white
knight is born on the square where a black knight was captured!} (13.
c8=Q $2 {(13. c8 R?)} Qf1+ $11 {and stalemate by the black desperado
queen}) (13. c8=B $19 Qxb3 14. Qc7+ Ka8 $11) 13... Kb8 14. Nb6 $1 Qxb3
15. Qc8+ Ka7 16. Qa8+ Kxb6 17. Qb8+ {Mutual Phoenix theme: Both black
and white knights are captured and reborn on the very same squares!}
1-0

[Event "1.p FIDE Olympic Ty 2012"]
[Site "?"]
[Date "2012.??.??"]
[Round "?"]
[White "Didukh, Sergei"]
[Black "White to play and draw"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "K1k5/P7/1p6/2p5/1P6/8/1bP3P1/8 w - - 0 1"]
[PlyCount "26"]
[EventDate "2012.??.??"]

1. b5 $1 ({Thematic try} 1. c3
$2 cxb4 $1 (1... b5 $2 2. g4 Bc1 (2... Bxc3 3. g5 cxb4 4. g6 Bd4 5. g7
$11) 3. g5 $1 Bxg5 4. c4 $3 cxb4 5. cxb5 Kc7 6. b6+ Kxb6 7. Kb8 Bf4+ 8.
Ka8 Be3 9. Kb8 $11) 2. cxb4 b5 3. g4 Bg7 {(Kc7)} 4. g5 Kc7 {(Bg7)} 5.
g6 Kb6 6. Kb8 Be5+ 7. Ka8 Ka6 {zz -+}) 1... Bc3 $1 2. g3 $3 ({ Thematic
try} 2. g4 $2 c4 {(Kc7)} 3. g5 Kc7 4. g6 Kc8 5. g7 Bxg7 6. c3 Bd4 $1 7.
cxd4 c3 8. d5 c2 9. d6 c1=Q $19) 2... Kc7 3. g4 Kc8 4. g5 Kc7 5. g6 c4
6. g7 Bxg7 7. c3 Bd4 8. cxd4 c3 9. d5 c2 10. d6+ {(check!)} Kxd6 (10...
Kc8 11. d7+ Kxd7 12. Kb7 c1=Q 13. a8=Q Qh1+ 14. Ka7 $11) 11. Kb7 c1=Q
12. a8=Q Qh1+ 13. Kxb6 Qxa8 {stalemate} 1/2-1/2

[Event "5.Hm CB 25 AT "]
[Site "?"]
[Date "2011.??.??"]
[Round "?"]
[White "Krug, Peter"]
[Black "White to play and win"]
[Result "1-0"]
[SetUp "1"]
[FEN "2r2bk1/r1R3p1/2n3K1/8/6BP/8/8/2R5 w - - 0 1"]
[PlyCount "19"]
[EventDate "2011.??.??"]

1. Be6+ Kh8 2. Rc5 (2. Rxc8 Ne7+ 3. Kg5 Nxc8 4. Rxc8 Kh7
5. Rxf8 Ra5+) 2... Ne7+ 3. Rxe7 Rxc5 4. Re8 Rf5 (4... Rg5+ 5. hxg5 Ra8
6. Bc8 Kg8 7. Rd8 Rb8 8. Be6+) 5. Bxf5 (5. Kxf5 Kh7 6. Rxf8 Ra5+ 7. Kg4
Ra4+ 8. Kg3 Ra3+ 9. Kg2 Ra4 10. Kg3 Ra3+ 11. Kg4 Ra4+ 12. Kg5 Ra5+ 13.
Bf5+ g6 14. Rf7+ Kg8 15. Kxg6 Ra6+ 16. Rf6 Rxf6+ 17. Kxf6 Kh8) 5... Ra6+
6. Be6 Ra8 7. Bc8 Kg8 8. Rd8 (8. h5 Rb8 9. h6 Rxc8 10. h7+ Kh8 11. Rxc8)
8... Rb8 9. Be6+ Kh8 10. Rd5 1-0

[Event "1.pl Team Championship of Russia"]
[Site "?"]
[Date "2012.??.??"]
[Round "?"]
[White "Pervakov, Oleg"]
[Black "White to play and win"]
[Result "1-0"]
[SetUp "1"]
[FEN "1k6/pN2pp2/r3r3/2R4B/Rp6/p7/7p/7K w - - 0 1"]
[PlyCount "17"]
[EventDate "2012.??.??"]

1. Na5 $1 b3 (1... Rab6 2. Bg4
Re1+ 3. Kxh2 e6 4. Nc4 $18) 2. Rb4+ $1 Reb6 3. Rbc4 Rxa5 4. Rc8+ Kb7 5.
R8c7+ $1 Ka6 $1 6. Be2 a2 (6... b2 7. Rc3+ Rbb5 8. R3c6#) (6... e6 7.
Rd4+ Rbb5 8. Rd6#) 7. Bf1 $3 {zz} a1=Q ({Main} 7... b2 8. Rc3+ Rab5 ({Main}
8... Rbb5 9. R3c6#) 9. Ra3#) ({Main} 7... e6 8. Rd4+ Rbb5 ({ Main} 8...
Rab5 9. Ra4#) 9. Rd6#) ({Main} 7... f6 8. Re4+ Rbb5 ({Main} 8... Rab5
9. Ra4#) 9. Re6#) 8. Rc1+ Rab5 ({Main} 8... Rbb5 9. R1c6#) 9. Rxa1# 1-0

[Event "1.p Zinchuk 75 MT"]
[Site "?"]
[Date "2012.??.??"]
[Round "?"]
[White "Eilazyan, Eduard"]
[Black "White to play and draw"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "1B6/K2k3p/3P4/8/3r2p1/6R1/p7/8 w - - 0 1"]
[PlyCount "41"]
[EventDate "2012.??.??"]

1. Ra3 $1 Rd2 2. Kb6 $1 g3 3. Ra7+ Kc8
4. Bc7 g2 5. Kc6 $1 Rc2+ 6. Kd5 g1=Q 7. d7+ $1 Kxd7 {[%cal Rg1a7] The
R-B battery has been built, but the rook is under attack by the queen.
Therefore,} 8. Bb6+ $1 {The bishop defends the rook. } Rc7 $1 9. Rxc7+
Kd8 {[%cal Rg1b6] And now the black queen attacks the white bishop in
the B-R battery (a similar situation).} 10. Rc5+ $1 {The rook defends
the bishop. The situation has been completely repeated, with a change
of functions of the rook and bishop!} Ke8 11. Rc8+ Kf7 12. Rc7+ Kg6 13.
Rg7+ $1 Kxg7 14. Bxg1 {Now begins the second phase of the struggle.} Kg6
$1 (14... a1=Q 15. Bd4+) 15. Bd4 Kf5 16. Bc3 $3 h5 17. Kd4 Kf4 18. Kd3
$1 Kf3 ({main} 18... h4 19. Ke2 $1 Kg3 20. Kf1 $11 {[%cal Rc3a1,Rf1h1]
The h-pawn is stopped by the king and a-pawn by the bishop!} Kh2 21. Kf2
h3) 19. Kc2 $1 h4 20. Kb2 h3 21. Be5 $11 {[%cal Re5h2,Rb2a1] And here
there is a similar situation, but with a change of function of the bishop
and the king.} 1/2-1/2

[Event "Fritz MT100 2nd/3rd Pr"]
[Site "?"]
[Date "2012.??.??"]
[Round "?"]
[White "Avni/Afek, Amazya/Yochanan"]
[Black "White to play and win"]
[Result "1-0"]
[SetUp "1"]
[FEN "8/7p/6p1/b3rP1k/5K2/4N1R1/5n2/2B5 w - - 0 1"]
[PlyCount "15"]
[EventDate "2012.??.??"]

1. Rg5+ (1. Kxe5 Bc7+
2. Kd5 Bxg3 3. f6 Bh4 4. f7 Be7) (1. f6 Nd3+ 2. Kf3 Nxc1 3. Rh3+ Kg5 4.
f7 Bb4) 1... Kh6 (1... Kh4 2. Ng2+ Kh3 3. Kxe5) 2. Ng4+ (2. Kxe5 Kxg5
3. Nd1+ Kh4 4. Nxf2 Bc7+ 5. Ke4 gxf5+) 2... Nxg4 3. Kxg4 {White threatens
mate in a move and Black appears to be helpless:} Kg7 ({for instance}
3... Re4+ 4. Kf3 $1 Rc4 5. Rxg6+ Kh5 6. Rh6#) 4. Bb2 (4. f6+ Kxf6 5. Bb2
h5+ 6. Kh4 Be1+) 4... Bd8 $1 (4... h5+ 5. Kh4 Bd8 (5... Bc7 6. Bxe5+ (6.
Rxg6+ Kf7 7. Bxe5 Bxe5 8. Kxh5) 6... Bxe5 7. Rxg6+ Kf7 8. Kxh5) (5...
Be1+ 6. Kh3 Kf6 7. Rg1) 6. Bxe5+ Kh6 7. f6) 5. f6+ $1 (5. Bxe5+ Kf7 6.
f6 h6 7. Kf4 hxg5+ 8. Kxg5 Bxf6+) 5... Bxf6 6. Bxe5 Kh6 7. Bd6 $1 Bxg5
8. Bf8# 1-0

[Event "1.p Ural's Problemist"]
[Site "?"]
[Date "2012.??.??"]
[Round "?"]
[White "Tarasiuk, Vlasislav"]
[Black "White to play and win"]
[Result "1-0"]
[SetUp "1"]
[FEN "k4K1B/p6P/p1P5/2P5/8/bn6/B5pQ/2q5 w - - 0 1"]
[PlyCount "23"]
[EventDate "2012.??.??"]

1. Qb8+ $1 Kxb8 2. Be5+ Ka8 (2...
Kc8 3. h8=Q Qxc5+ 4. Kf7+ Qf8+ 5. Qxf8+ Bxf8 6. Bxb3 g1=Q 7. Be6+ Kd8
8. c7#) 3. h8=Q Qh1 4. Bh2 Qxh2 $1 5. Qxh2 g1=Q $1 6. Qxg1 Bxc5+ 7. Ke8
$3 Bxg1 8. c7 Kb7 9. Kd7 $1 Nc5+ 10. Kd8 Ne6+ $1 11. Bxe6 Bb6 12. Bd5#
1-0
[/pgn]

[ernest]

Strange!...
Houdini 4 certainly has no problem with that position:

Analysis by Houdini 4 w32 Syz:
.........
1.Na5 b3 2.Rb4+ Rab6 3.Rxb3 a2 4.Rc1 Rxb3 5.Nxb3 f5 6.Kxh2 Rh6
= (0.17) Depth: 6/21 00:00:00 17kN
1.Na5 b3 2.Rb4+ Rab6 3.Rxb3 a2 4.Rc1 Rxb3 5.Nxb3 f5 6.Nd4
= (0.20) Depth: 7/21 00:00:00 21kN
1.Na5 b3 2.Rb4+ Reb6 3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 b2 6.Bf3+ Rc6 7.Bxc6+ Kxc6
= (-0.20) Depth: 8/27 00:00:00 47kN
1.Na5
= (-0.13 !) Depth: 9/31 00:00:00 68kN
1.Na5
= (-0.01 !) Depth: 9/31 00:00:00 71kN
1.Na5 b3 2.Rb4+ Reb6 3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Rb6 7.Bf3+ Kc7 8.Ra5 b2 9.Rxa7+ Kd6 10.Be4 Rb4 11.Rd8+ Ke6
= (0.05) Depth: 9/34 00:00:00 101kN
1.Na5
= (0.11 !) Depth: 10/34 00:00:00 129kN
1.Na5 b3 2.Rb4+ Reb6 3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Rb6 7.Ra5 Ra6
= (0.00) Depth: 10/34 00:00:00 147kN
1.Na5 b3 2.Rb4+ Reb6 3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Kc7 7.Rxb3 a2 8.Rc3+ Kd6 9.Rd8+ Ke5 10.Rc5+ Kf4 11.Rc4+ Ke5 12.Rc5+ Kf4
= (0.00) Depth: 11/37 00:00:00 270kN
1.Na5 b3 2.Rb4+ Reb6 3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Kc7 7.Rxb3 a2 8.Rc3+ Kd6 9.Rd3+ Ke5 10.Re3+ Kd4 11.Re1 a1Q 12.Rg4+ Kd3 13.Rg3+ Kd4 14.Rg4+ Kd3
= (0.00) Depth: 12/41 00:00:00 428kN
1.Na5
= (0.06 !) Depth: 13/44 00:00:00 874kN
1.Na5
= (0.18 !) Depth: 13/44 00:00:00 959kN
1.Na5 b3 2.Rd4 Rxa5 3.Rxa5 b2 4.Rd1 Re3 5.Bxf7 Rc3 6.Kxh2 Rc1 7.Rb5+ Kc7 8.Rd3 a6 9.Rbb3 a5 10.Kg3 b1Q 11.Rxb1 Rxb1 12.Rxa3
= (0.09) Depth: 13/44 00:00:01 1367kN, tb=2
1.Na5 b3
= (0.02 --) Depth: 14/44 00:00:01 1758kN, tb=2
1.Na5 b3 2.Rd4 Rxa5 3.Rxa5 b2 4.Rd1 Rd6 5.Rb1 Rc6 6.Kxh2 Rc1 7.Rxb2+ axb2 8.Rb5+ Kc7 9.Rxb2 a5 10.Ra2 Rc5 11.Bf3 Rc3 12.Kg2 Kb6 13.Be4 f5 14.Bxf5
= (0.02) Depth: 14/44 00:00:01 2163kN, tb=2
1.Na5 b3 2.Rd4 Rxa5 3.Rxa5 b2 4.Rd1 Rd6 5.Rb1 Rc6 6.Kxh2 Rc1 7.Rxb2+ axb2 8.Rb5+ Kc7 9.Rxb2 a5 10.Ra2 Rc5 11.Bxf7 e5 12.Ra3 Rc1 13.Rxa5 Kb6 14.Rxe5 Rc3 15.Bd5
= (0.06) Depth: 15/44 00:00:01 2833kN, tb=7
1.Na5 b3
= (0.00 --) Depth: 16/44 00:00:02 4071kN, tb=26
1.Na5 b3 2.Rd4 Rxa5 3.Rxa5 b2 4.Rd1 Rd6 5.Re1 Re6 6.Rf1 Rf6 7.Rd1 Rd6 8.Re1
= (0.00) Depth: 16/44 00:00:02 5412kN, tb=34
1.Na5 b3 2.Rd4 Rxa5 3.Rxa5 b2 4.Rd1 Rd6 5.Re1 Re6 6.Rf1 Rf6 7.Rd1 Rd6 8.Re1
= (0.00) Depth: 17/44 00:00:03 8937kN, tb=66
1.Na5 b3 2.Rd4 Rxa5 3.Rxa5 b2 4.Rd1 Rd6 5.Re1 Re6 6.Rf1 Rf6 7.Rd1 Rd6 8.Re1
= (0.00) Depth: 18/44 00:00:06 15060kN, tb=188
1.Na5
= (0.06 !) Depth: 19/47 00:00:09 23111kN, tb=268
1.Na5
= (0.18 !) Depth: 19/47 00:00:09 24162kN, tb=272
1.Na5
+/= (0.47 !) Depth: 19/47 00:00:10 28072kN, tb=329
1.Na5
+- (1.51 !) Depth: 19/47 00:00:13 34666kN, tb=365
1.Na5 Rab6 2.Bxf7 Red6 3.Kxh2 a6 4.Kg3 Rd3+ 5.Kf4 Rdd6 6.Bb3 Rh6 7.Nc4 Rbf6+ 8.Rf5 a5 9.Nxa5 Rb6 10.Nc4 Rb7 11.Raa5 Rh4+ 12.Ke5 Rh8 13.Kd5 Rc7 14.Ra4 Rd8+ 15.Ke6 Rb7 16.Ra6 Rd3
+- (3.12) Depth: 19/70 00:03:22 566mN, tb=40147
1.Na5
+- (3.25 !) Depth: 20/70 00:03:32 593mN, tb=40587
1.Na5
+- (3.50 !) Depth: 20/70 00:03:43 623mN, tb=41236
1.Na5 Rab6 2.Bxf7 Red6 3.Kxh2 a6 4.Kg3 Ka7 5.Rc7+ Kb8 6.Rxe7 Rd3+ 7.Kf4 Rd1 8.Bc4 Kc8 9.Nb3 Rdd6 10.Ke5 Rh6 11.Nd4 Kb8 12.Nf5 Rhf6 13.Re8+ Kc7 14.Bd5 Rg6 15.Re7+ Kb8 16.Ra5 Rg5 17.Rc5
+- (3.44) Depth: 20/70 00:03:45 630mN, tb=41347
1.Na5
+- (3.58 !) Depth: 21/70 00:04:07 691mN, tb=43100
1.Na5 Rab6 2.Bxf7 Red6 3.Kxh2 a6 4.Kg3 Ka7 5.Rc7+ Kb8 6.Rxe7 Rd3+ 7.Kf4 Rd1 8.Bc4 Kc8 9.Nb3 Rdd6 10.Ke5 Rh6 11.Kd4 Rhf6 12.Ra7 Kb8 13.R7xa6 Rfd6+ 14.Ke5 Rxa6 15.Bxa6 Rb6 16.Bd3 Kc7 17.Ra7+ Rb7
+- (3.59) Depth: 21/70 00:04:21 732mN, tb=44035
1.Na5 Rab6
+- (3.44 --) Depth: 22/70 00:04:37 776mN, tb=45116
1.Na5
+- (3.73 !) Depth: 22/70 00:05:07 864mN, tb=48079
1.Na5 Rab6 2.Bxf7 Red6 3.Kxh2 a6 4.Kg3 Rd3+ 5.Kf4 Rdd6 6.Bb3 Rd4+ 7.Ke3 Rh4 8.Bd5 Rh5 9.Rxb4 Rh3+ 10.Kd2 Rxb4 11.Nc6+ Kc7 12.Nxb4+ Kb6 13.Rc1 a5 14.Nc6 Rh7 15.Kd3 a4 16.Be6 Rh6 17.Nd4 Rg6 18.Rc6+ Ka5 19.Rc5+ Kb6 20.Rb5+ Kc7 21.Kc3
+- (3.93) Depth: 22/70 00:06:12 1048mN, tb=53979
1.Na5
+- (4.09 !) Depth: 23/70 00:08:20 1387mN, tb=66567
1.Na5 Rab6 2.Bxf7 Red6 3.Kxh2 a6 4.Kg3 Rd3+ 5.Kf4 Rdd6 6.Bb3 Rd4+ 7.Ke3 Rh4 8.Bd5 Rh5 9.Rxb4 Rh3+ 10.Kd2 Rh2+ 11.Kc1 Rxb4 12.Nc6+ Kc7 13.Nxb4+ Kb6 14.Rc2 Rh5 15.Be4 Kb5 16.Nc6 e6 17.Kb1 Rh3 18.Nd4+ Kb4 19.Nxe6 Rh6 20.Rc6 Rh4 21.Bd5 Rh5 22.Rc4+
+- (4.19) Depth: 23/70 00:10:35 1757mN, tb=81445
1.Na5 Rab6
+- (4.02 --) Depth: 24/70 00:10:38 1764mN, tb=81924
1.Na5 Rab6
+- (3.67 --) Depth: 24/70 00:10:40 1772mN, tb=82243
1.Na5
+- (4.37 !) Depth: 24/72 00:16:40 2805mN, tb=146823
1.Na5 Rab6 2.Bxf7 Red6 3.Kxh2 a6 4.Kg3 Rd3+ 5.Kf4 Rdd6 6.Bb3 Rd4+ 7.Ke3 Rh4 8.Bd5 Rh5 9.Rxb4 Rh3+ 10.Kd2 Rh2+ 11.Kc1 Rxb4 12.Nc6+ Kc7 13.Nxb4+ Kb6 14.Rc2 Rh5 15.Be4 Rh4 16.Nd5+ Kb5 17.Kb1 e6 18.Nc7+ Kb6 19.Rc4 Rh2 20.Rc6+ Ka5 21.Rxa6+ Kb4 22.Nxe6 Re2 23.Rb6+ Kc3 24.Rc6+ Kb4
+- (4.34) Depth: 24/72 00:16:47 2825mN, tb=148278
1.Na5 Rab6
+- (4.17 --) Depth: 25/72 00:16:53 2840mN, tb=149263
1.Na5 Rab6 2.Bxf7 Red6 3.Kxh2 a6 4.Kg3 Rd3+ 5.Kf4 Rdd6 6.Bb3 Rd4+ 7.Ke3 Rh4 8.Bd5 Rh5 9.Rxb4 Rxb4 10.Nc6+ Kb7 11.Nxb4+ Kb6 12.Rc1 e6 13.Ba2 Rh3+ 14.Kd4 Rh4+ 15.Kc3 e5 16.Kb3 Kb5 17.Nd5 Rh3+ 18.Nc3+ Kc5 19.Kxa3 e4 20.Ka4 e3 21.Ne2+ Kb6 22.Bd5 Rh4+ 23.Kb3 Rh2 24.Rc6+ Ka5 25.Bc4 Rh6 26.Rc8
+- (4.40) Depth: 25/72 00:23:04 3908mN, tb=200238
1.Na5 Rab6
+- (4.22 --) Depth: 26/72 00:23:16 3943mN, tb=202465

[zullil]

from : http://en.chessbase.com/post/yochanan-a ... -year-2012
About all studies are solved by SF with correct score in a couple of seconds.

Only one study is badly evaluated by Stockfish (version syzygy_14020920) :
[d]1k6/pN2pp2/r3r3/2R4B/Rp6/p7/7p/7K w - -
Na5 is winning but SF evaluated as draw

Latest Stockfish solves this---if I disable null move pruning:

Code: Select all

info depth 30 currmove b7a5 currmovenumber 1
info depth 30 seldepth 47 score cp 15 lowerbound nodes 715289175 nps 18156851 time 39395 multipv 1 pv b7a5 b4b3 a4b4 e6b6 b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 30 currmove b7a5 currmovenumber 1
info depth 30 seldepth 47 score cp 23 lowerbound nodes 718414228 nps 18133530 time 39618 multipv 1 pv b7a5 b4b3 a4b4 e6b6 b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 30 currmove b7a5 currmovenumber 1
info depth 30 seldepth 47 score cp 35 lowerbound nodes 722501011 nps 18128695 time 39854 multipv 1 pv b7a5 b4b3 a4b4 e6b6 b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 30 currmove b7a5 currmovenumber 1
info depth 30 seldepth 47 score cp 53 lowerbound nodes 725964192 nps 18117399 time 40070 multipv 1 pv b7a5 b4b3 a4b4 e6b6 b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 30 currmove b7a5 currmovenumber 1
info depth 30 seldepth 47 score cp 80 lowerbound nodes 732053956 nps 18114766 time 40412 multipv 1 pv b7a5 b4b3 a4b4 e6b6 b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 30 currmove b7a5 currmovenumber 1
info depth 30 seldepth 47 score cp 122 lowerbound nodes 743981060 nps 18121128 time 41056 multipv 1 pv b7a5 b4b3 a4b4 e6b6 b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 30 currmove b7a5 currmovenumber 1
info depth 30 seldepth 47 score cp 183 lowerbound nodes 766254641 nps 18139209 time 42243 multipv 1 pv b7a5 b4b3 a4b4 e6b6 b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 30 currmove b7a5 currmovenumber 1
info depth 30 seldepth 47 score cp 275 lowerbound nodes 811310803 nps 18309467 time 44311 multipv 1 pv b7a5 b4b3 a4b4 e6b6 b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 30 currmove b7a5 currmovenumber 1
info depth 30 seldepth 47 score cp 412 lowerbound nodes 972905565 nps 18992046 time 51227 multipv 1 pv b7a5 b4b3 a4b4 e6b6 b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 30 currmove b7a5 currmovenumber 1
info depth 30 currmove c5a5 currmovenumber 6
info depth 30 seldepth 54 score cp 581 nodes 3153172366 nps 23176399 time 136051 multipv 1 pv b7a5 e6h6 a4b4 a6b6 b4a4 a7a6 a4a3 b8a7 a3b3 b6b3 a5b3 f7f6 c5a5 a7b8 h5e2 h6h3 b3c5 h3c3 c5a6 b8b7 a6c5 b7b8 e2d3 b8c7 h1h2 c7c6 d3e4 c6b6 c5a4 b6a5 a4c3 e7e6 e4d3 a5b4 c3e2 b4c5 h2g3 e6e5

[phenri]

The critical position for Stockfish is that it

4: Pervakov,O - White to play and win, 1.pl Team Championship of Russia 2012
[D]1k6/p3pp2/rr6/N1R4B/1R6/pp6/7p/7K w - - 0 1

Critter find it at depth 13 instantly

Analysis by Critter 1.6a 64-bit:
1st try
3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Kc7 7.Rxb3 a2 8.Rc3+ Kd6 9.Rd8+ Ke5 10.Re3+ Kf4 11.Rf3+ Ke4 12.Rd1 a1Q 13.Rxa1 Rxa1+ 14.Kxh2
= (0.00) Depth: 13/30 00:00:00 790kN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.21 ++) Depth: 13/30 00:00:00 1078kN

2 try
3.Rd4 Rxa5 4.Rd8+ Kb7 5.Rxa5 b2 6.Bf3+ Kc7 7.Rd1 Rd6 8.Rxd6 a2 9.Rd1 b1Q 10.Rxa7+ Kc8 11.Ra8+ Kc7 12.Ra7+
= (0.00) Depth: 13/34 00:00:00 1166kN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.08 ++) Depth: 13/34 00:00:00 1563kN


Analysis by stockfish 2.3.1 JA 64bit SSE4.2 -231-64-popcnt-ja:
1st try
3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Kc6 7.Rxb3 a2 8.Rc8+ Kd6 9.Rd3+ Ke5 10.Re3+ Kf4 11.Rf3+ Ke5 12.Rc5+ Kd6 13.Rc1 a1Q 14.Rxa1 Rxa1+ 15.Kxh2 f6 16.Rd3+ Kc5 17.Rc3+ Kd6 18.Rd3+
= (0.00) Depth: 27/57 00:00:27 143MN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.08 ++) Depth: 28/57 00:00:44 240MN

2nd try
3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Kc6 7.Rxb3 a2 8.Rc8+ Kd6 9.Rd3+ Ke5 10.Re3+ Kf4 11.Rf3+ Ke5 12.Rc5+ Kd4 13.Rc1 a1R 14.Rxa1 Rxa1+ 15.Kxh2 f6 16.Kg2 a5 17.Be8 Ke5 18.Re3+ Kd6 19.Rd3+ Ke5 20.Re3+
= (0.00) Depth: 26/56 00:00:18 97739kN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.08 ++) Depth: 27/56 00:00:26 141MN


Analysis by stockfish 3 JA 64bit SSE4.2 -3-64-pop-ja:
1st try
3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Kc6 7.Rxb3 a2 8.Rc3+ Kd6 9.Rd3+ Ke5 10.Re3+ Kd4 11.Re1 a1Q 12.Rd8+ Kc3 13.Rxa1 Rxa1+ 14.Kxh2 f6 15.Kg3 a5 16.Kf4 a4 17.Rc8+ Kd4 18.Rd8+ Kc3
= (0.00) Depth: 27/48 00:00:25 138MN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.08 ++) Depth: 28/48 00:00:37 207MN

2nd try
3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Kc6 7.Rxb3 a2 8.Rc8+ Kd6 9.Rd3+ Ke5 10.Re3+ Kd4 11.Re1 a1Q 12.Rd8+ Kc3 13.Rxa1 Rxa1+ 14.Kxh2 f6 15.Kg3 a5 16.Kf4 a4 17.Rc8+ Kb4 18.Rb8+ Kc5 19.Rc8+ Kb4
= (0.00) Depth: 27/48 00:00:24 134MN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.08 ++) Depth: 28/48 00:00:37 205MN

3rd try
3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Kc6 7.Rxb3 a2 8.Rc3+ Kd6 9.Rd3+ Kc7 10.Rd1 a1Q 11.Rxa1 Rxa1+ 12.Kxh2 f6 13.Re8 Kd6 14.Rd8+ Ke5 15.Re8 Kd6
= (0.00) Depth: 27/53 00:00:32 181MN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.08 ++) Depth: 28/53 00:00:47 265MN


Analysis by stockfish 4 64 SSE4.2 _4_x64_modern_sse42:
1st try
3.Rd4 Rxa5 4.Rxa5 b2 5.Rd1 b1Q 6.Rxb1 Rxb1+ 7.Kxh2 Rb2+ 8.Kg3 Rb3+ 9.Kf4 f6 10.Bf7 Rh3 11.Be6 Rd3 12.Ke4 Rg3 13.Kd4 Kb7 14.Kc5 Rc3+ 15.Kb5 Kb8 16.Kb4 Re3 17.Bb3 Kb7 18.Rxa3 Kb6 19.Ra1 a5+ 20.Kc4 f5 21.Bc2 f4 22.Kd4 e5+ 23.Kd5
= (0.14) Depth: 29/55 00:00:47 270MN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+
= (0.22 ++) Depth: 30/55 00:01:12 412MN

2nd try
3.Rd4 Rxa5 4.Rxa5 b2 5.Rd1 b1Q 6.Rxb1 Rxb1+ 7.Kxh2 f6 8.Rxa3 Rb5 9.Bf3 a5 10.Rc3 a4 11.Bd1 Rb2+ 12.Kg3 Ra2 13.Kf4 a3 14.Ke4 Ra1 15.Be2 Kb7 16.Kd5 Re1 17.Bc4 Re5+ 18.Kd4 Ra5 19.Rc2 Kb6 20.Be6 Re5 21.Bd5 Rh5 22.Rc6+
= (0.14) Depth: 28/57 00:00:51 303MN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1 a1Q 8.Rc1+ Rbb5 9.R1c6#
= (0.22 ++) Depth: 29/57 00:01:07 392MN


Analysis by stockfish DD 64 SSE4.2 -dd-64-modern:
1st try
3.Rd4 Rxa5 4.Rxa5 b2 5.Rd1 Rd6 6.Rb1 Rc6 7.Kxh2 Rc1 8.Rb5+ Kc7 9.R5xb2 axb2 10.Rxb2 f6 11.Kg3 a5 12.Ra2 Rc5 13.Bf7 Rg5+ 14.Kf4 Kd6 15.Bc4 Rh5 16.Ke3 e6 17.Bd3 Rh3+ 18.Kd2 Rh5 19.Ra1 Rc5 20.Ke3 Rg5 21.Be4
= (0.12) Depth: 31/45 00:00:20 123MN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.20 ++) Depth: 32/45 00:00:30 183MN

2nd try
3.Rd4 Rxa5 4.Rxa5 b2 5.Rd1 Rd6 6.Rb1 Rc6 7.Kxh2 Rc1 8.Rb5+ Kc7 9.R5xb2 axb2 10.Rxb2 f6 11.Ra2 Rc5 12.Bf7 a5 13.Kg3 Rf5 14.Kg4 Rg5+ 15.Kf3 Rf5+ 16.Kg4
= (0.10) Depth: 34/53 00:00:58 368MN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.18 ++) Depth: 35/53 00:01:23 523MN

3rd try
3.Rd4 Rxa5 4.Rxa5 b2 5.Rd1 Rd6 6.Rf1 Rf6 7.Re1 Re6 8.Rb1 Rc6 9.Kxh2 Rc1 10.Rxb2+ axb2 11.Rb5+ Kc7 12.Rxb2 f6 13.Kg3 a5 14.Kf4 Rc4+ 15.Ke3 Kd6 16.Bf7 e6 17.Rb6+ Rc6 18.Rb7 Rc7 19.Rxc7 Kxc7
= (0.12) Depth: 32/50 00:00:29 179MN
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.20 ++) Depth: 33/50 00:00:40 248MN


Analysis by Stockfish 160214 64 SSE4.2 : Fail
1st try
3.Rd4 Rxa5 4.Rxa5 b2 5.Rd1 Rd6 6.Rb1 Rc6 7.Kxh2 Rc1 8.Rb5+ Kc7 9.R1xb2 axb2 10.Rxb2 f6 11.Re2 e5 12.Rf2 Rc4 13.Kg3 Rf4 14.Ra2 Kb6 15.Rb2+ Kc7 16.Bf3 Ra4 17.Rb7+ Kd6 18.Bg4 Ra3+
= (0.08) Depth: 36/54 00:01:25 538MN

2nd try
3.Rd4 Rxa5 4.Rxa5 b2 5.Rd1 Rd6 6.Rb1 Rc6 7.Kxh2 Rc1 8.Rxb2+ axb2 9.Rb5+ Kc7 10.Rxb2 f6 11.Ra2 Rc5 12.Bf7 a5 13.Kg3 Rg5+ 14.Kf4 Kd6 15.Bb3 e6 16.Bc4 Rc5 17.Bd3 Rh5 18.Ke3 Re5+ 19.Kf3 Rh5 20.Ra4 Rg5 21.Ra1 Rc5 22.Ke4 Re5+ 23.Kd4 Rd5+
= (0.06) Depth: 36/53 00:01:40 643MN

3rd try with more time...
3.Rd4 Rxa5 4.Rxa5 b2 5.Rd1 Rd6 6.Rb1 Rc6 7.Kxh2 Rc1 8.Rb5+ Kc7 9.R1xb2 axb2 10.Rxb2 f6 11.Ra2 Rc5 12.Bf7 a5 13.Kg3 Rf5 14.Re2 Re5 15.Rc2+ Kb6 16.Be8 Rd5 17.Re2 Re5 18.Rb2+ Kc5 19.Kf4 Rg5 20.Ra2 Kd6 21.Rb2 e5+ 22.Kf3 Rg1 23.Rb6+
= (0.07) Depth: 38/60 00:02:54 1175MN
3.Rd4 Rxa5 4.Rxa5 b2 5.Rd1 Rd6 6.Rb1 Rc6 7.Kxh2 Rc1 8.Rb5+ Kc7 9.R1xb2 axb2 10.Rxb2 f6 11.Ra2 Rc5 12.Bf7 a5 13.Kg3 Rf5 14.Re2 Re5 15.Rc2+ Kb6 16.Be8 Rd5 17.Re2 Re5 18.Rb2+ Kc5 19.Kf4 Rg5 20.Ra2
= (0.07) Depth: 39/60 00:03:52 1552MN


Analysis by StockfishRW ValentineDay 64 SSE4.2 _VD: Fail
3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Kc6 7.Rxb3 a2 8.Rc3+ Kd6 9.Rd3+ Ke5 10.Re3+ Kf4 11.Rf3+ Ke4 12.Rg4+ Ke5 13.Rg5+ Ke4 14.Rg4+
= (0.00) Depth: 25/43 00:01:24 695MN, tb=554905
3.Rbc4 Rxa5 4.Rc8+ Kb7 5.R8c7+ Ka6 6.Be2 a2 7.Bf1
= (0.03 ++) Depth: 26/43 00:02:18 1146MN, tb=914088


Analysis by StockfishRW 170214 64 SSE4.2 : Fail
3.Rg4 Rxa5 4.Rg8+ Kb7 5.Rxa5 Ra6 6.Rb5+ Kc6 7.Rxb3 a2 8.Rc8+ Kd6 9.Rd3+ Ke5 10.Re3+ Kf4 11.Rf3+ Ke5 12.Rc5+ Kd4 13.Rc1 a1Q 14.Rxa1 Rxa1+ 15.Kxh2 f6 16.Kg3 a5 17.Be8 Ke5 18.Re3+ Kd6 19.Rd3+ Kc5 20.Rc3+ Kd4 21.Rf3
= (0.00) Depth: 38/60 00:02:15 864MN, tb=1397482

So the question is: what has happened between Stockfish DD and the current Stockfish

[zullil]

The critical position for Stockfish is that it

4: Pervakov,O - White to play and win, 1.pl Team Championship of Russia 2012
[D]1k6/p3pp2/rr6/N1R4B/1R6/pp6/7p/7K w - - 0 1

Latest Stockfish with null move pruning disabled finds it very fast:

Code: Select all

info depth 25 seldepth 46 score cp 113 lowerbound nodes 86019191 nps 7253494 time 11859 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 46 score cp 222 lowerbound nodes 87719046 nps 7331303 time 11965 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 46 score cp 327 lowerbound nodes 91918291 nps 7543561 time 12185 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 46 score cp 345 lowerbound nodes 98088497 nps 7823296 time 12538 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 46 score cp 373 lowerbound nodes 100565858 nps 7924811 time 12690 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 46 score cp 414 lowerbound nodes 104766264 nps 8110727 time 12917 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 46 score cp 475 lowerbound nodes 110207417 nps 8357277 time 13187 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 46 score cp 576 lowerbound nodes 112361227 nps 8448847 time 13299 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 46 score cp 713 lowerbound nodes 115218766 nps 8541050 time 13490 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 46 score cp 918 lowerbound nodes 117286965 nps 8617704 time 13610 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 46 score cp 1326 lowerbound nodes 118256008 nps 8652667 time 13667 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 seldepth 47 score cp 1787 lowerbound nodes 127307318 nps 8903232 time 14299 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 25 currmove b4c4 currmovenumber 1
info depth 25 currmove b4b6 currmovenumber 2
info depth 25 currmove h5d1 currmovenumber 13
info depth 25 currmove b4h4 currmovenumber 20
info depth 25 seldepth 47 score cp 2045 nodes 146048228 nps 9497836 time 15377 multipv 1 pv b4c4 b6c6 a5c6 b8c7 c6b4 c7d6 b4a6 e7e5 c5a5 b3b2 c4b4 f7f5 a5a3 d6e7 b4b2 e7f6 b2h2 e5e4 a6c5 f6e5 h5g6 e5f6 a3a6 f6e5 h2e2 e4e3 e2e3 e5d4 e3f3

[phenri]

Wait, even in this position, he has difficulty to quickly find the right move.
It's still disturbing ...

4: Pervakov,O - White to play and win, 1.pl Team Championship of Russia 2012
[D]2R5/pk2pp2/1r6/r6B/2R5/pp6/7p/7K w - - 0 1

Analysis by Stockfish 160214 64 SSE4.2 :
5.Be2 Re6 6.R4c7+ Kb6 7.Rc3 Kb7 8.R3c7+
= (0.00) Depth: 34/21 00:00:10 61677kN
5.R8c7+ Ka6 6.Be2 a2 7.Bf1 a1Q 8.Rc1+
= (0.09 ++) Depth: 35/21 00:00:22 138MN

[zullil]

Wait, even in this position, he has difficulty to quickly find the right move.
It's still disturbing ...

4: Pervakov,O - White to play and win, 1.pl Team Championship of Russia 2012
[D]2R5/pk2pp2/1r6/r6B/2R5/pp6/7p/7K w - - 0 1

Analysis by Stockfish 160214 64 SSE4.2 :
5.Be2 Re6 6.R4c7+ Kb6 7.Rc3 Kb7 8.R3c7+
= (0.00) Depth: 34/21 00:00:10 61677kN
5.R8c7+ Ka6 6.Be2 a2 7.Bf1 a1Q 8.Rc1+
= (0.09 ++) Depth: 35/21 00:00:22 138MN

The current dev version of Stockfish solves this instantly:

Code: Select all

info depth 10 seldepth 17 score mate 6 nodes 75016 nps 355526 time 211 multipv 1 pv c8c7 b7b8 h5f3 a5d5 f3d5 b6c6 c7c6 a7a5 c6a6 b3b2 a6a8

Not sure what's wrong with yours.

[D]1k6/p3pp2/rr6/N1R4B/1R6/pp6/7p/7K w - - 0 1

can't be solved by the latest. A bit of testing suggests that the following commit is "to blame":

https://github.com/mcostalba/Stockfish/ ... a3d8579fa9

[EDIT] The latest version can solve the second position, just not quickly:

Code: Select all

info depth 47 seldepth 61 score cp 8 lowerbound nodes 10755264434 nps 22153010 time 485499 multipv 1 pv b4c4 a6a5 c5c8

Code: Select all

info depth 47 seldepth 61 score cp 10897 lowerbound nodes 21487825063 nps 23342706 time 920537 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7

[Uri Blass]

Wait, even in this position, he has difficulty to quickly find the right move.
It's still disturbing ...

4: Pervakov,O - White to play and win, 1.pl Team Championship of Russia 2012
[D]2R5/pk2pp2/1r6/r6B/2R5/pp6/7p/7K w - - 0 1

Analysis by Stockfish 160214 64 SSE4.2 :
5.Be2 Re6 6.R4c7+ Kb6 7.Rc3 Kb7 8.R3c7+
= (0.00) Depth: 34/21 00:00:10 61677kN
5.R8c7+ Ka6 6.Be2 a2 7.Bf1 a1Q 8.Rc1+
= (0.09 ++) Depth: 35/21 00:00:22 138MN

The current dev version of Stockfish solves this instantly:

Code: Select all

info depth 10 seldepth 17 score mate 6 nodes 75016 nps 355526 time 211 multipv 1 pv c8c7 b7b8 h5f3 a5d5 f3d5 b6c6 c7c6 a7a5 c6a6 b3b2 a6a8

Not sure what's wrong with yours.

[D]1k6/p3pp2/rr6/N1R4B/1R6/pp6/7p/7K w - - 0 1

can't be solved by the latest. A bit of testing suggests that the following commit is "to blame":

https://github.com/mcostalba/Stockfish/ ... a3d8579fa9

[EDIT] The latest version can solve the second position, just not quickly:

Code: Select all

info depth 47 seldepth 61 score cp 8 lowerbound nodes 10755264434 nps 22153010 time 485499 multipv 1 pv b4c4 a6a5 c5c8

Code: Select all

info depth 47 seldepth 61 score cp 10897 lowerbound nodes 21487825063 nps 23342706 time 920537 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7

Are you sure that you blame the right commit?
It should be a non functional change that changes nothing.

[phenri]

(...)
[EDIT] The latest version can solve the second position, just not quickly:

Code: Select all

info depth 47 seldepth 61 score cp 8 lowerbound nodes 10755264434 nps 22153010 time 485499 multipv 1 pv b4c4 a6a5 c5c8

Code: Select all

info depth 47 seldepth 61 score cp 10897 lowerbound nodes 21487825063 nps 23342706 time 920537 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7

10 billion nodes later and he can find it ...

[zullil]

Are you sure that you blame the right commit?
It should be a non functional change that changes nothing.

Well, it's actually this one:

https://github.com/mcostalba/Stockfish/ ... 6a33ecf4a8

but Marco needed some help getting his code correct, so I linked to final version of the commit.

Try yourself. The code prior to this commit solves the problem more quickly:

Code: Select all

Stockfish sig-7804908 64 SSE4.2 by Tord Romstad, Marco Costalba and Joona Kiiski
position fen 1k6/p3pp2/rr6/N1R4B/1R6/pp6/7p/7K w - - 0 1
go infinite
info depth 1 seldepth 2 score cp 0 nodes 128 nps 42666 time 3 multipv 1 pv b4b3 a6a5 c5a5 b6b3 h5f7
info depth 2 seldepth 2 score cp 0 nodes 224 nps 56000 time 4 multipv 1 pv b4b3 a6a5 c5a5 b6b3 h5f7
info depth 3 seldepth 3 score cp 0 nodes 601 nps 100166 time 6 multipv 1 pv b4b3 a6a5 c5a5 b6b3 h5f7
info depth 4 seldepth 4 score cp 0 nodes 974 nps 139142 time 7 multipv 1 pv b4b3 a6a5 c5a5 b6b3 h5f7
info depth 5 seldepth 6 score cp 39 nodes 5237 nps 290944 time 18 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 a6b6
info depth 6 seldepth 8 score cp 39 nodes 5678 nps 315444 time 18 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 a6b6
info depth 7 seldepth 10 score cp 27 nodes 6850 nps 342500 time 20 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 a6b6 g8g5
info depth 8 seldepth 10 score cp 0 nodes 8885 nps 386304 time 23 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 a6b6 b5a5
info depth 9 seldepth 17 score cp -83 nodes 22963 nps 441596 time 52 multipv 1 pv b4b3 a3a2 b3a3 b6b1 h1h2 a2a1q a3a1 b1a1 a5c6 b8b7 c6e7
info depth 10 seldepth 17 score cp 0 nodes 41155 nps 377568 time 109 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 a6b6 b5a5
info depth 11 seldepth 17 score cp 0 nodes 60574 nps 383379 time 158 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 a6b6 b5a5
info depth 12 seldepth 17 score cp 0 nodes 92501 nps 380662 time 243 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 a6b6 b5a5
info depth 13 seldepth 29 score cp 5 nodes 135018 nps 392494 time 344 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 b7c7 b5b3 a3a2 b3c3 c7d7 h5g4 e7e6 c3d3 d7e7 d3d1 a2a1q d1a1 a6a1 h1h2
info depth 14 seldepth 29 score cp 8 nodes 291362 nps 356624 time 817 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 b7c7 h1h2 a3a2 g8g1 f7f5 b5b3 a2a1q g1a1 a6a1 b3b5 e7e6 h2g3 a7a6 b5e5 c7d6
info depth 15 seldepth 29 score cp 8 nodes 347683 nps 372650 time 933 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 b7c7 h1h2 a3a2 g8g1 f7f5 b5b3 a2a1q g1a1 a6a1 b3b5 e7e6 h2g3 a7a6 b5e5 c7d6
info depth 16 seldepth 34 score cp 3 nodes 756272 nps 400780 time 1887 multipv 1 pv b4g4 a6a5 g4g8 b8b7 c5a5 b6a6 a5b5 b7c6 b5b3 a3a2 h5f3 c6d6 g8d8 d6e5 d8d5 e5f4 d5d4 f4g5 d4d1 a2a1q d1a1 a6a1 h1h2 f7f5 h2g3 f5f4 g3h3 g5f5 f3g4 f5e4 b3b7
info depth 17 seldepth 37 score cp 5 nodes 1414161 nps 460338 time 3072 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3d3 f4e4 d3g3 f7d5 g3g4 e4d3 e7e5 d5e4 g4g3 d3c2 g3g4
info depth 18 currmove b4d4 currmovenumber 1
info depth 18 currmove b4b6 currmovenumber 2
info depth 18 currmove c5c3 currmovenumber 11
info depth 18 currmove c5c1 currmovenumber 13
info depth 18 currmove b4c4 currmovenumber 17
info depth 18 currmove a5b7 currmovenumber 21
info depth 18 currmove h5g6 currmovenumber 22
info depth 18 currmove c5c7 currmovenumber 23
info depth 18 currmove h5g4 currmovenumber 25
info depth 18 currmove c5f5 currmovenumber 31
info depth 18 seldepth 37 score cp 5 nodes 1569584 nps 485788 time 3231 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3d3 f4e4 d3g3 f7d5 g3g4 e4d3 e7e5 d5e4 g4g3 d3c2 g3g4
info depth 19 currmove b4d4 currmovenumber 1
info depth 19 currmove b4b6 currmovenumber 2
info depth 19 currmove b4b5 currmovenumber 11
info depth 19 currmove c5c6 currmovenumber 14
info depth 19 currmove c5c8 currmovenumber 15
info depth 19 currmove h5e2 currmovenumber 17
info depth 19 currmove a5b7 currmovenumber 26
info depth 19 currmove c5g5 currmovenumber 27
info depth 19 currmove c5e5 currmovenumber 29
info depth 19 currmove h5g4 currmovenumber 30
info depth 19 currmove h5d1 currmovenumber 34
info depth 19 seldepth 37 score cp 6 nodes 2016948 nps 521444 time 3868 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3d3 f4e4 d3g3 f7d5 b8c7 a5a7 c7d6 d5a2 g3h3 a7a6 d6c5 a2e6 h3h4 e4d3 c5b4 a6a7
info depth 20 currmove b4d4 currmovenumber 1
info depth 20 currmove b4b3 currmovenumber 5
info depth 20 seldepth 43 score cp 5 nodes 3950258 nps 727219 time 5432 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3h3 f7e6 h3c3 e6d5 c3d3 d5e4 d3b3 a5a6 b3c3 e4d5 c3d3 f4e4 d3g3 e4d4 g3h3 a6e6 h3h7 e6e3 e7e5 d4c5 h7c7 c5d6 a3a2 e3b3 b8c8 d5e6
info depth 21 currmove b4d4 currmovenumber 1
info depth 21 currmove b4b6 currmovenumber 2
info depth 21 currmove h5f3 currmovenumber 10
info depth 21 currmove c5c8 currmovenumber 11
info depth 21 currmove c5c1 currmovenumber 14
info depth 21 currmove c5c6 currmovenumber 15
info depth 21 currmove c5d5 currmovenumber 16
info depth 21 currmove c5c4 currmovenumber 21
info depth 21 currmove h5e2 currmovenumber 22
info depth 21 currmove c5e5 currmovenumber 27
info depth 21 currmove c5f5 currmovenumber 29
info depth 21 currmove b4f4 currmovenumber 31
info depth 21 seldepth 43 score cp 5 nodes 4524192 nps 786952 time 5749 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3h3 f7e6 h3c3 e6d5 c3d3 d5e4 d3b3 a5a6 b3c3 e4d5 c3d3 f4e4 d3g3 e4d4 g3h3 a6e6 h3h7 e6e3 e7e5 d4c5 h7c7 c5d6 a3a2 e3b3 b8c8 d5e6
info depth 22 currmove b4d4 currmovenumber 1
info depth 22 currmove h1h2 currmovenumber 6
info depth 22 currmove h5g6 currmovenumber 10
info depth 22 currmove c5e5 currmovenumber 11
info depth 22 currmove b4b5 currmovenumber 13
info depth 22 currmove b4a4 currmovenumber 15
info depth 22 seldepth 43 score cp 8 nodes 6375095 nps 983355 time 6483 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3h3 f7e6 h3d3 f4e4 d3g3 e4d4 b8b7 e6c4 g3h3 d4c5 h3c3 c5b4 c3h3 c4e6 h3g3 e6d5 b7b6 d5c4 g3h3 a5a6 b6b7 b4c5
info depth 23 currmove b4d4 currmovenumber 1
info depth 23 currmove b4b6 currmovenumber 2
info depth 23 currmove a5c6 currmovenumber 9
info depth 23 seldepth 43 score cp 10 nodes 9678277 nps 1335487 time 7247 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3h3 f7e6 h3d3 f4e4 d3g3 e4d4 b8b7 d4c5 g3c3 c5b5 a7a6 b5b4 b7b6 a5a4 c3c5 a4a3 a6a5 b4a4 c5b5 a3c3 b5b4 a4a3
info depth 24 currmove b4d4 currmovenumber 1
info depth 24 currmove b4b6 currmovenumber 2
info depth 24 currmove c5c8 currmovenumber 10
info depth 24 currmove b4a4 currmovenumber 12
info depth 24 currmove c5b5 currmovenumber 14
info depth 24 currmove c5c6 currmovenumber 20
info depth 24 currmove h5g6 currmovenumber 21
info depth 24 currmove h5e2 currmovenumber 22
info depth 24 currmove h5g4 currmovenumber 25
info depth 24 currmove c5e5 currmovenumber 28
info depth 24 currmove c5f5 currmovenumber 29
info depth 24 currmove c5c2 currmovenumber 30
info depth 24 currmove b4f4 currmovenumber 31
info depth 24 seldepth 43 score cp 10 nodes 11249286 nps 1506130 time 7469 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3h3 f7e6 h3d3 f4e4 d3g3 e4d4 b8b7 d4c5 g3c3 c5b5 a7a6 b5b4 b7b6 a5a4 c3c5 a4a3 a6a5 b4a4 c5b5 a3c3 b5b4 a4a3
info depth 25 currmove b4d4 currmovenumber 1
info depth 25 currmove b4b6 currmovenumber 2
info depth 25 currmove h5f3 currmovenumber 12
info depth 25 currmove c5c7 currmovenumber 14
info depth 25 currmove c5b5 currmovenumber 15
info depth 25 currmove c5c6 currmovenumber 17
info depth 25 currmove h5g6 currmovenumber 18
info depth 25 currmove c5d5 currmovenumber 19
info depth 25 currmove a5c4 currmovenumber 20
info depth 25 currmove c5c4 currmovenumber 21
info depth 25 currmove b4c4 currmovenumber 22
info depth 25 currmove c5g5 currmovenumber 23
info depth 25 currmove c5c2 currmovenumber 24
info depth 25 currmove b4e4 currmovenumber 26
info depth 25 currmove c5e5 currmovenumber 28
info depth 25 seldepth 43 score cp 8 nodes 15229806 nps 1919078 time 7936 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3h3 f7e6 h3d3 f4e4 d3g3 e4d4 b8b7 d4c5 g3c3 c5b4 c3g3 e6d5 b7b6 d5c4 b6b7 b4c5 g3c3 c5b4 c3h3 b4c5 h3c3
info depth 26 currmove b4d4 currmovenumber 1
info depth 26 currmove b4b6 currmovenumber 2
info depth 26 currmove c5c8 currmovenumber 12
info depth 26 currmove c5c3 currmovenumber 13
info depth 26 currmove c5c1 currmovenumber 15
info depth 26 currmove b4b5 currmovenumber 17
info depth 26 currmove h5g4 currmovenumber 23
info depth 26 currmove h5e2 currmovenumber 24
info depth 26 currmove c5c2 currmovenumber 28
info depth 26 currmove b4e4 currmovenumber 29
info depth 26 currmove c5e5 currmovenumber 31
info depth 26 currmove a5b7 currmovenumber 33
info depth 26 currmove b4h4 currmovenumber 34
info depth 26 seldepth 44 score cp 8 nodes 22106413 nps 2601366 time 8498 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3h3 f7e6 h3d3 f4e4 d3g3 e4d4 b8b7 d4c5 g3c3 c5b4 c3g3 e6d5 b7b6 d5c4 b6b7 b4c5 g3c3 c5b4 c3h3 b4c5 h3c3
info depth 27 currmove b4d4 currmovenumber 1
info depth 27 currmove b4b6 currmovenumber 2
info depth 27 currmove c5d5 currmovenumber 12
info depth 27 currmove c5c3 currmovenumber 13
info depth 27 currmove c5c8 currmovenumber 15
info depth 27 currmove b4b5 currmovenumber 17
info depth 27 currmove c5g5 currmovenumber 21
info depth 27 currmove c5e5 currmovenumber 22
info depth 27 currmove h5d1 currmovenumber 25
info depth 27 currmove h5g4 currmovenumber 26
info depth 27 currmove c5c2 currmovenumber 29
info depth 27 currmove b4f4 currmovenumber 30
info depth 27 currmove c5c7 currmovenumber 32
info depth 27 currmove a5b7 currmovenumber 33
info depth 27 currmove b4h4 currmovenumber 34
info depth 27 seldepth 45 score cp 8 nodes 30544960 nps 3336788 time 9154 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3h3 f7e6 h3d3 f4e4 d3g3 e4d4 b8b7 d4c5 g3c3 c5b4 c3g3 e6d5 b7b6 d5c4 b6b7 b4c5 g3c3 c5b4 c3h3 b4c5 h3c3
info depth 28 currmove b4d4 currmovenumber 1
info depth 28 currmove b4b6 currmovenumber 2
info depth 28 currmove h5f3 currmovenumber 8
info depth 28 currmove a5c4 currmovenumber 9
info depth 28 currmove h1g2 currmovenumber 12
info depth 28 currmove c5c8 currmovenumber 16
info depth 28 currmove c5c1 currmovenumber 17
info depth 28 currmove h5g4 currmovenumber 18
info depth 28 currmove b4b5 currmovenumber 20
info depth 28 currmove b4h4 currmovenumber 34
info depth 28 seldepth 46 score cp 10 nodes 44024255 nps 4442407 time 9910 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b2b1q d1b1 b6b1 h1h2 b1b2 h2g3 b2b3 g3f4 f7f6 h5f7 b3h3 f7e6 h3d3 f4e4 d3g3 e4d4 b8b7 e6c4 g3h3 d4c5 h3c3 c5b5 b7b8 b5b4 c3e3 c4b3 e7e5 b3d5 f6f5 b4c5 f5f4 a5b5 b8c8 c5d6
info depth 29 currmove b4d4 currmovenumber 1
info depth 29 currmove b4b6 currmovenumber 2
info depth 29 currmove c5c7 currmovenumber 10
info depth 29 currmove c5b5 currmovenumber 12
info depth 29 currmove c5c1 currmovenumber 14
info depth 29 currmove c5c6 currmovenumber 15
info depth 29 currmove a5c4 currmovenumber 16
info depth 29 currmove c5d5 currmovenumber 17
info depth 29 currmove c5c2 currmovenumber 18
info depth 29 currmove c5c3 currmovenumber 19
info depth 29 currmove b4a4 currmovenumber 20
info depth 29 currmove h1g2 currmovenumber 23
info depth 29 currmove c5c4 currmovenumber 25
info depth 29 currmove b4c4 currmovenumber 26
info depth 29 currmove c5f5 currmovenumber 31
info depth 29 currmove b4h4 currmovenumber 32
info depth 29 seldepth 47 score cp 9 nodes 74086972 nps 6282283 time 11793 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b6d6 d1b1 d6c6 h1h2 c6c1 b1b2 a3b2 a5b5 b8c7 b5b2 f7f6 b2a2 c1c5 h5e2 a7a5 h2g3 e7e6 g3f4 c5f5 f4e4 c7d6 e2d3 f5e5 e4d4 e5d5 d4e3 d5e5 e3f4 f6f5 a2a1 e5d5 f4e3 d6e5
info depth 30 currmove b4d4 currmovenumber 1
info depth 30 currmove h5f7 currmovenumber 4
info depth 30 currmove h5f3 currmovenumber 8
info depth 30 currmove c5c8 currmovenumber 10
info depth 30 currmove c5c1 currmovenumber 12
info depth 30 currmove c5c6 currmovenumber 14
info depth 30 currmove h5e2 currmovenumber 16
info depth 30 currmove b4b5 currmovenumber 19
info depth 30 currmove c5c2 currmovenumber 26
info depth 30 currmove b4f4 currmovenumber 29
info depth 30 seldepth 47 score cp 9 nodes 97276385 nps 7275176 time 13371 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b6d6 d1b1 d6c6 h1h2 c6c1 b1b2 a3b2 a5b5 b8c7 b5b2 f7f6 b2a2 c1c5 h5f7 a7a5 h2g3 c5g5 g3f3 c7d6 a2d2 d6c5 d2c2 c5b4 c2b2 b4c5 f7e8 g5d5 b2b8 e7e5 b8a8 c5b4 e8f7 d5d3 f3e4 d3d4 e4e3
info depth 31 currmove b4d4 currmovenumber 1
info depth 31 currmove b4b6 currmovenumber 2
info depth 31 currmove h5f3 currmovenumber 8
info depth 31 currmove c5c8 currmovenumber 9
info depth 31 currmove c5c3 currmovenumber 10
info depth 31 currmove a5c6 currmovenumber 11
info depth 31 seldepth 53 score cp 9 nodes 166242514 nps 9926111 time 16748 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b6d6 d1b1 d6c6 h1h2 c6c1 b1b2 a3b2 a5b5 b8c7 b5b2 f7f6 h5e8 c1c5 b2d2 c5g5 e8a4 c7b6 d2d7 g5g4 a4d1 g4g7 h2h3 a7a5 d1c2 b6b5 d7b7 b5c4 c2a4 c4c3 a4c6 f6f5 b7b5 g7g6 c6e8
info depth 32 currmove b4d4 currmovenumber 1
info depth 32 currmove b4b6 currmovenumber 2
info depth 32 currmove a5c6 currmovenumber 10
info depth 32 seldepth 53 score cp 7 nodes 203646237 nps 10813840 time 18832 multipv 1 pv b4d4 a6a5 c5a5 b3b2 d4d1 b6d6 d1b1 d6c6 h1h2 c6c1 b1b2 a3b2 a5b5 b8c7 b5b2 f7f6 h5e8 c1c5 b2d2 c5g5 e8a4 c7b6 d2d7 g5g4 a4d1 g4g7 h2h3 a7a5 d1c2 b6b5 d7b7 b5c4 c2a4 c4c3 a4c6 c3c4 b7a7 c4c5 c6e4 c5b4
info depth 33 currmove b4d4 currmovenumber 1
info depth 33 currmove a5b3 currmovenumber 3
info depth 33 currmove b4g4 currmovenumber 7
info depth 33 seldepth 53 score cp 15 lowerbound nodes 277314955 nps 11873392 time 23356 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 33 currmove b4c4 currmovenumber 1
info depth 33 seldepth 53 score cp 23 lowerbound nodes 281874229 nps 11924118 time 23639 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1
info depth 33 currmove b4c4 currmovenumber 1
info depth 33 seldepth 53 score cp 35 lowerbound nodes 284850906 nps 11935427 time 23866 multipv 1 pv b4c4 a6a5 c5c8 b8b7 c8c7 b7a6 h5e2 a3a2 e2f1