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- - By QueensideCastler (**) [no] Date 2017-02-18 04:39 Edited 2017-02-19 14:58
Nrk5/1N6/n2n4/8/2B5/3KB3/1R5b/r2bQ3 b - - 0 1


6n1/8/5k2/4p1bR/4B1P1/6K1/8/8 b - - 0 5


k1q5/2P3PP/p5p1/P5p1/PP4P1/1QK1n3/3p4/r3r2N w - - 0 0


8/pp5P/kp4pp/1p6/1P5P/2n3pK/2p5/1b4N1 w - - 0 1


6k1/2p2p1p/4pP2/8/1pPB1P1P/7p/1KP1R3/7r w - - 0 0


[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "6N1/Rp4p1/3q3p/1B3P1k/5P2/5K2/1P1r1N1P/8 w - - 0 0"]
[PlyCount "15"]

1. Be2 Qd5+ 2. Ke3+ Kh4 3. Ne7 Qd4+ 4. Kf3 Rxe2 5. Kxe2 Qxa7 6. Ng6+ Kh5 7. Ne5
Qd4 8. Ned3 *



8/kppp4/8/K4bp1/P1P1n2p/6bP/1N5Q/1R1B4 w - - 0 0


8/7p/P3K3/2p3rp/1PP1k3/7P/8/8 w - - 0 0


4K3/1bPB4/1P6/P2P4/8/8/k1r5/r7 w - - 0 1
Parent - - By QueensideCastler (**) [no] Date 2017-02-21 06:06 Edited 2017-02-22 08:05


[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "5b2/3P3b/2k5/8/4R3/NpN3pp/1Rp5/2K4B b - - 0 0"]
[PlyCount "10"]

1... Bh6+ 2. Re3+ g2 3. Bxg2+ hxg2 4. Nxc2 g1=Q+ 5. Nd1 Kxd7 6. Rbxb3 *



8/3k3b/7b/8/8/1R2R3/2N5/2KN2q1 b - - 0 6




Can black win this 8-man position?

2NK4/8/8/3P3Q/2kn4/8/8/1b2q3 b - - 0 6
Parent - - By QueensideCastler (**) [no] Date 2017-02-27 10:36
Something fishy about this one

K3n3/4P3/7q/4nP2/k4N2/1Rp2pQ1/P6r/7b w - - 0 0


Parent - By QueensideCastler (**) [no] Date 2017-02-27 15:01
P. Krug

8/pp1pBq2/7p/P6p/4k3/3R4/2BK4/8 w - - 0 0
Parent - - By Peter Grayson (****) [gb] Date 2017-02-26 14:12 Edited 2017-02-26 14:16
Position 3 of the original 5 positions gave a curious output from the 3 top engines seeing the score run up to +25 by Stockfish 8 only to drop back and eventually aquiesce at +3.5 at 50 ply depth after 2 hours on my dual Xeon machine. It saw in just under 1 minute what took  over 6 minutes on my overclocked quad!

Outputs included in attached file

PeterG
Attachment: QSCastlerComplexPositions.zip - outputs in file (27k)
Parent - By QueensideCastler (**) [no] Date 2017-02-27 10:43
Thanks for testing few of the puzzles posted above :)

I recommend using last available builds from http://abrok.eu/stockfish/

There is some elo gain since last official release ;)
Parent - - By Vinvin (***) [be] Date 2017-02-28 18:36
Please make comments about all this positions, I don't understand the purpose ...

>8/7p/P3K3/2p3rp/1PP1k3/7P/8/8 w - - 0 0
>8/kppp4/8/K4bp1/P1P1n2p/6bP/1N5Q/1R1B4 w - - 0 0
>8/pp5P/kp4pp/1p6/1P5P/2n3pK/2p5/1b4N1 w - - 0 1
>k1q5/2P3PP/p5p1/P5p1/PP4P1/1QK1n3/3p4/r3r2N w - - 0 0
>4K3/1bPB4/1P6/P2P4/8/8/k1r5/r7 w - - 0 1


 

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "6N1/Rp4p1/3q3p/1B3P1k/5P2/5K2/1P1r1N1P/8 w - - 0 1"]

1. Be2 Qd5 2. Ke3 Kh4 3. Ne7 Qd4 4. Kf3 Rxe2 5. Kxe2 Qxa7 6. Ng6 Kh5 7. Ne5 Qd4
8. Ned3

>6k1/2p2p1p/4pP2/8/1pPB1P1P/7p/1KP1R3/7r w - - 0 0
>6n1/8/5k2/4p1bR/4B1P1/6K1/8/8 b - - 0 5
>Nrk5/1N6/n2n4/8/2B5/3KB3/1R5b/r2bQ3 b - - 0 1


Parent - - By user923005 (****) [us] Date 2017-02-28 23:36
Here is what I have on these:

8/kppp4/8/K4bp1/P1P1n2p/6bP/1N5Q/1R1B4 w - - acd 46; acs 2980; bm Qh1; c3 "Qh1";
c6 yacpdb id 408637; authors: - Josten, Gerhard; source: Moderný šach; date: 2009-06-06; distinction: 6th Comm.; algebraic: white: [Ka5, Qh2, Rb1, Bd1, Sb2, Ph3, Pc4, Pa4] black: [Ka7, Bg3, Bf5, Se4, Ph4, Pg5, Pd7, Pc7, Pb7]; stipulation: +; solution: | 1.Bd1-g4 ? Bg3*h2 2.Bg4*f5 Se4-d6 3.Ka5-b4 Sd6*f5 4.Sb2-d3 Sf5-e3 5.Rb1-b2 Bh2-g3 6.Rb2-e2 Se3-f5 7.Re2-e4 1.Qh2*g3 ? Se4*g3 2.Rb1-c1 c7-c5 ! 3.Bd1-f3 Sg3-e2 4.Bf3*e2 b7-b6+ 5.Ka5-b5 Bf5-e4 3.Ka5-b5 d7-d6 4.Bd1-g4 Bf5*g4 5.h3*g4 Sg3-e2 3.Sb2-d3 Bf5*d3 4.Ka5-b5 d7-d6 5.a4-a5 Bd3-f5 6.Kb5-a4 Bf5*h3 2.Sb2-d3 !? Bf5*d3 3.Rb1-b5 b7-b6+ 4.Ka5-b4 c7-c5+ 5.Kb4-c3 Bd3-f1 6.Bd1-g4 Sg3-e4+ 7.Kc3-c2 Bf1*c4 8.Rb5-b1 d7-d5 3...Sg3-e4 1.Qh2-g1+ ? c7-c5 2.Ka5-b5 b7-b6 3.Qg1*c5 b6*c5 4.Rb1-c1 Bg3-f2 1.Qh2-h1 c7-c5 2.Sb2-d3 Bg3-c7+ 3.Ka5-b5 d7-d6 4.Sd3*c5 d6*c5 5.Qh1*e4 Bf5*e4 6.Rb1-b3 {guarding f3} Bc7-d6 7.Bd1-f3 Be4-f5 8.Bf3-g4 Bf5-e4 9.Bg4-d7 g5-g4 10.h3*g4 Be4-g2 11.g4-g5 h4-h3 12.Rb3*h3 Bg2*h3 13.Bd7*h3 {wins} b7-b6 14.Kb5-c6 Bd6-f4 15.g5-g6 Bf4-h6 16.Kc6-d5 Ka7-a6 17.Bh3-d7 Ka6-a5 18.Kd5-e6 Ka5-b4 19.Bd7-b5 Bh6-g7 20.Ke6-f7 13...Bd6-f8 14.a4-a5 Bf8-e7 15.g5-g6 Be7-f8 16.Bh3-g2 11...Bd6-e7 12.g5-g6 {wins} 10...Bd6-f4 11.Kb5*c5 Be4-g2 12.Bd7-e6 h4-h3 13.Be6-d5 {wins} 9...Be4-c6+ 10.Bd7*c6 b7*c6+ 11.Kb5*c6 {wins} 8...Bf5*g4 9.h3*g4 {$18} 7...Be4-c2 8.Rb3-e3 {wins} 6...Bc7-b6 7.Bd1-f3 Be4-f5 8.Bf3-g4 Bf5-e4 9.Bg4-d7 {wins} 6.Rb1-b2 Bc7-b6 5.Bd1-g4 Bc7-b6 ! 6.Qh1*e4 Bf5*e4 7.Bg4-d7 Be4*b1 4...Se4-c3+ 5.Kb5-b4 Sc3-a2+ 6.Kb4-a3 {wins} 4.Qh1*e4 Bf5-d7+ 3...Se4-d6+ 4.Kb5*c5 {wins} 3...b7-b6 4.Sd3*c5 b6*c5 5.Rb1-b3 2...b7-b6+ 3.Rb1*b6 {wins} 2.Ka5-b5 b7-b6 3.Qh1*e4 Bf5*e4 4.a4-a5 Be4-c6# 3.a4-a5 Se4-c3# 2.Qh1*e4 b7-b6+ 3.Ka5-b5 Bf5*e4 1...Bg3-d6 2.c4-c5 Bd6*c5 3.Sb2-c4 b7-b6+ 4.Sc4*b6 c7*b6+ 5.Rb1*b6 Bc5*b6+ 6.Ka5-b5 {wins}; ce 277; id "yacpdb id 408637"; pm Qh1; pv Qh1 c5 Nd3 Bc7+ Kb5 d6 Nxc5 dxc5 Qxe4 Bxe4 Rb3 Bd6 Bf3 Bg6 Re3 Bf5 Bg4 Bf4 Ra3 Be4 Kxc5 Bg3 Rb3 Bf2+ Kb4 Bc6 Rd3 Be1+ Kb3 Bg2 c5 Bg3 Rd7 Kb8 Re7 Bf1 Kb4 Bf4 Kc3 Bg3 Kd4 Bf2+ Kd5 Bg2+ Kc4 Bg3 Rf7 Bf4 Be6 Bg3 Rf5 Bf4 Rf8+ Ka7 Rf7 Kb8 Bg4 Bf1+ Kd4 Bg2 Be6 Bh2 Bd5 Bxh3 Rxb7+ Kc8;
K3n3/4P3/7q/4nP2/k4N2/1Rp2pQ1/P6r/7b w - - acd 40; acs 2981; bm Ne6; ce -646; pm Ne6; pv Ne6;

8/pp1pBq2/7p/P6p/4k3/3R4/2BK4/8 w - - acd 38; acs 2982; bm Bd6; ce 11; pm Bd6;
pv Bd6 Qf1 Bb8 Qf8 Rh3+ Kd5 Rxh5+ Kc6 Be4+ d5 Bxd5+ Kb5 Bg3 Qb4+ Ke2 Qb2+ Kf1 Qb1+ Kg2 Ka4 Re5 Qc2+ Kg1 Qc3 Kh2 Qd2+ Kh3 Qd3 Be4 Qb3 Rd5 b5 axb6 axb6 Rd4+ Ka5 Kg2 Qb2+ Bf2 b5 Rd7 Ka4 Bf3 Qc3 Ra7+ Kb3 Re7 Qd2 Re5 Ka4 Rd5 Qb2 Bd1+ Kb4 Kf1 Qb1 Kg1 Kc3;
8/3k3b/7b/8/8/1R2R3/2N5/2KN2q1 b - - acd 64; acs 2983; bm Bf5; ce 149; pm Bf5;
pv Bf5 Rc3 Qf1 Kd2 Qg2+ Kc1 Qd5 Nb2 Qh1+ Nd1 Qe4 Kd2 Qd5+ Kc1 Bg6 Nb2 Qe5 Nd1 Bg5 Na3 Kd8 Nc2 Bf5 Ra3 Be4 Rc3 Bg6 Na3 Qd5 Nc2 Kd7 Nb4 Qb5 Nc2 Qf1 Kd2 Bh6 Ne1 Kd8 Ra3 Bf5 Ra8+ Kc7 Ra3 Kb8 Rc3 Bg5 Nc2 Bg6 Ne1 Bh6 Nc2 Bf4 Rb3+ Kc8 Rc3+ Kd7 Nb4 Qg2+ Kc1 Bg5 Nd3 Kd8 Nb4 Qe4 Nc2 Bh6 Rc5 Kd7 Rc3 Bf4 Nf2 Qd5 Nd1 Bf5 Ne1 Bh7 Nc2 Bg6 Nb4 Qb5 Nc2 Qf1 Kd2;
4K3/1bPB4/1P6/P2P4/8/8/k1r5/r7 w - - acd 51; acs 2988; bm Bc6; c3 "Bc6"; ce -428; pm Bc6;
pv Bc6 Ba6 Kd7 Rh1 c8=N Ka3 Ne7 Kb4 b7 Rh8 Kc7 Bxb7 Kxb7 Kc5 Nc8 Rh7+ Ka6 Ra2 Bb7 Rh3 Nb6 Kb4 Bc6 Rxa5+ Kb7 Rh7+ Nd7 Ra1 Kb6 Rb1 Ne5 Rh5 Nd7 Kc4+ Kc7 Rh7 Kd6 Rh6+ Kc7 Re1 Nb6+ Kc5 Nd7+ Kd4 Nf8 Rg1 Ne6+ Ke5 Nc5 Rh7+ Nd7+ Kd4 Kd6 Rh6+ Kc7 Rg7 Kb8 Rhg6 Kc7 Rh7 Kb8 Rgh6 Kc7 Re7 Kc8 Re8+ Kc7 Rg8 Kb6 Rg2 Nf8 Ke5 Kc7 Rg1 Nd7+ Kd4 Nf8 Rg2 Ne6+ Ke5 Kb6 Rb2+ Kc5;
2NK4/8/8/3P3Q/2kn4/8/8/1b2q3 b - - acd 35; acs 2992; bm Qa5+; ce 55; pm Qa5+;
pv Qa5+ Ke8;
6n1/8/5k2/4p1bR/4B1P1/6K1/8/8 b - - acd 76; acs 2996; bm Nh6; ce -435; pm Nh6;
pv Nh6 Bd5 Kg6 Kf3 Bf4 Rh1 Kf6 Bc4 Bd2 Rh5 Bf4 Bb3 Kg6 Rh1 Kg5 Bc4 Kg6 Ra1 Kg5 Ra7 Kf6 Bd5 Bd2 Ra8 Kg5 Bc4 Bf4 Ra1 Kh4 Rg1 Kg5 Bb3 Bh2 Ra1 Bf4 Ra8 Kh4 Rh8 Kg5 Bc4 Kf6 Rd8 Kg5 Ra8 Kh4 Rh8 Bd2 Bd5 Bf4 Bf7 Kg5 Bb3 Kf6 Bc4 Ke7 Rh7+ Kf6 Ra7 Bd2 Ra8 Kg5 Bd5 Kf6 Rd8 Bf4 Rd7 Kg5 Rg7+ Kf6 Rh7 Bg5 Kg3 Kg6 Be4+ Kf6 Rd7 Ng8 Ra7 Bd2 Ra8 Ne7 Kf3 Kg7;
6N1/Rp4p1/3q3p/1B3P1k/5P2/5K2/1P1r1N1P/8 w - - acd 49; acs 3600; bm Be2; c3 "Kg3";
c6 3.prize Sarychev MT; 2009; Günter Amann; draws;  1. Kg3 (1. Ne4 $2 Qd5) 1... Qd8 $1 (1... g6 2. Ne4) (1... Qf8 2. Ne4) 2. Nf6+ $1 (2. Ne4 $2 Qh4+ 3. Kf3 Qh3+ 4. Ng3+ Kh4) 2... gxf6 (2... Qxf6 3. Be8+) 3. Ra8 $1 (3. Ng4 $2 Rd3+) 3... Qxa8 4. Ng4 Rg2+ (4... Qg8 5. Be8+ Qxe8 6. Nxf6#) 5. Kh3 Rxg4 6. Be2 Qg8 7. Bf3 $1 (7. Bd1 $2 Qb3+ 8. Bxb3 Rxf4) 7... b6 $1 (7... b5 8. b4) (7... Qb3) 8. b3 $1 (8. b4 $2 Qb3) 8... b5 9. b4 Qb3 (9... Qg7 10. Be2 Qg8 11. Bf3) 1/2-1/2; ce -543; pm Be2; pv Be2 Qd5+;
8/7p/P3K3/2p3rp/1PP1k3/7P/8/8 w - - acd 87; acs 3600; bm b5; ce 0; pm b5;
pv b5 Rg6+ Kd7 Kd4 Kc7 Rg7+ Kc6 Kxc4 b6 Rg6+ Kc7 Rg7+ Kc6;
6k1/2p2p1p/4pP2/8/1pPB1P1P/7p/1KP1R3/7r w - - acd 60; acs 31140; bm Kb3; ce 76; pm Kb3;
pv Kb3 h2 Bb2 c5 Bc1 Rxc1 Rxh2 Rf1 Rd2 h6 Ka4 Rxf4 Kb5 Rf5 Kb6 Kh7 Rg2 h5 Kc6 Kh6 Kd6 Rxf6 Kxc5 Rg6 Rxg6+ Kxg6 Kd6 f5 c5 f4 c6 f3 c7 f2 c8=Q f1=Q Qg8+ Kh6 Qg5+ Kh7 Qxh5+ Kg7 Qe5+ Kh7 Qe4+ Kg7 h5 Qa6+ Qc6 Qa3 Qc5 Kf7 Qc7+ Kg8 Qc4 Kg7 Kxe6 Qh3+ Kd6 Qxh5 Qd4+ Kh7 Qe4+ Kh6 Qe3+ Kh7 Qe7+ Kh6 Qe4 Qa5 Qe3+ Kh7 Qd3+ Kg7 Kc6 Qg5 Qd4+ Kg6 Qd5 Qc1 Qe4+ Kg5 Kd5 Qd2+ Kc5 Qc3+ Kb5 Qb2 Qe3+ Kg6 Qe6+ Kh7 Qe4+ Kg8 Qd5+ Kg7 Qc4 Kh8 Qc8+ Kg7 Qf5 Qc3 Qd7+ Kf8 Qd6+ Kf7 Qf4+ Kg7 Qe4 Kh8 Qc6 Qb2 Qe8+ Kh7 Qd7+ Kg8 Qf5;
8/pp5P/kp4pp/1p6/1P5P/2n3pK/2p5/1b4N1 w - - acd 86; acs 31200; bm Ne2; c3 "Ne2";
c6 yacpdb id 285730; authors: - Pallier, Alain; source: Nunn-50JT; date: 2005; distinction: 9th Commendation; algebraic: ;  white: [Kh3, Sg1, Ph7, Ph4, Pb4];  black: [Ka6, Bb1, Sc3, Ph6, Pg6, Pg3, Pc2, Pb7, Pb6, Pb5, Pa7]; stipulation: +; solution: | {This is a very complex study, involving an underpromotion by Black and reciprocal zugzwangs. White's queen finally defeats Black's collection of minor pieces thanks to Black's poor king position. However, the interesting play must be balanced against the heavy initial position, in which Black's king has been artificially placed in a box.} 1. Ne2 $1 Nxe2 2. h8=Q { Threatening Qa1+.} 2... c1=N $1 3. Qa1+ $1 (3. Qb2 $2 Bf5+ 4. Kg2 Be4+ { is perpetual check}) (3. Qe5 $4 Bc2 $1 {allows Black to transfer his bishop to the safe square a4, after which White will even lose.}) 3... Ba2 (3... Na2 $2 4. Qxb1 {wins. If White picks up a minor piece for nothing then he should win in the end by playing his king to a8 or b8 to attack Black's pawns.}) 4. Kg2 $1 {Black's minor pieces are paralysed and he must push a pawn.} 4... g5 $1 5. hxg5 $1 ({After} 5. h5 $4 g4 { White is on the wrong side of a full-point zugzwang:} 6. Kf1 Nf4 $1 7. Qxc1 Bc4+ 8. Kg1 Ne2+ {and wins}) 5... hxg5 6. Kf3 $1 {Great accuracy is required:} (6. Kf1 $4 {even loses after} 6... Nf4 7. Qxc1 (7. Kg1 Nce2+) 7... Bc4+ { followed by a knight fork.}) (6. Kh1 $4 Nf4 {also wins for Black.}) (6. Kh3 $2 {is the thematic try:} 6... Nf4+ 7. Kxg3 Nfd3 8. Kh2 g4 9. Kg3 Ne2+ 10. Kh4 ( 10. Kxg4 Nxb4) 10... Nec1 {draws as it is White to play in the reciprocal zugzwang - he cannot take on g4 because of the reply ... Nxb4. See also the note to White's 9th move.}) 6... g4+ ({Or} 6... Nf4 7. Qxc1 Bd5+ 8. Ke3 Bb3 9. Qa3+ Ba4 10. Kf3 g2 11. Kf2 g4 12. Kg1 g3 13. Qa1 Nd3 14. Qc3 { and Black loses his kingside pawns}) (6... g2 7. Kxg2 g4 (7... Nf4+ 8. Kh2 Nfd3 9. Kg3 g4 10. Kh4 {transposes to the main line}) 8. Kh2 g3+ (8... Nc3 9. Qxc3 g3+ 10. Qxg3 {and}) (8... Nd4 9. Qxd4 g3+ 10. Kg2 {also win for White}) 9. Kg2 {and Black loses his g-pawn and then a piece.}) 7. Kg2 $1 { Black is now in zugzwang and must surrender the g3-pawn.} 7... Nf4+ $1 { Transferring the knight to d3 is the best defence.} (7... Nc3 8. Kxg3 { loses both g-pawns.}) 8. Kxg3 Nfd3 (8... Nfe2+ 9. Kxg4 {wins}) 9. Kh4 $1 { Now it is Black to play in the reciprocal zugzwang.} (9. Kxg4 $2 { only draws after} 9... Nxb4 $1 10. Qxc1 Be6+ $1 11. Kf3 {(say)} 11... Nc6 12. Qa3+ Na5 {. This kind of position cannot be won, since the only weakness in Black's position is the a7-pawn. White can win it but, for this, needs to have wKa8 and wQb8, and with White's pieces so far out of play Black draws comfortably by ...b4 and ...Kb5, etc.}) (9. Kh2 $2 Nf4 $1 10. Kg3 Nfd3 { is a loss of time.}) 9... g3 {The second g-pawn goes and soon after a piece.} 10. Kxg3 Nxb4 { Or else White wins a piece and then marches his king to attack a7 or b7.} 11. Qxc1 {There is no saving check on e6 here.} 11... Bb3 (11... Nc6 12. Qa3+) 12. Qa3+ {and wins} 1-0; ce 0; id "yacpdb id 285730"; pm Ne2; pv Ne2 Nxe2 h8=Q Ba2 Qa1 c1=N Kg2 g5 hxg5 hxg5 Kf3 g2 Kxg2 Nf4+ Kg3 Nfd3 Kg4 Nxb4 Qxc1 Be6+ Kxg5 Nc6 Qa1+ Na5 Kf6 Bg8 Qb2 Bb3 Qc3 Ba4 Ke6 Nc6 Qd3 Ka5 Kd6 b4 Qd5+ Ka6 Qc4+ Bb5 Qb3 Ka5 Qa2+ Ba4 Qd5+;
k1q5/2P3PP/p5p1/P5p1/PP4P1/1QK1n3/3p4/r3r2N w - - acd 50; acs 31200; bm g8=Q; c3 "g8=Q"; ce 218; pm g8=Q;
pv g8=Q Ka7;
Nrk5/1N6/n2n4/8/2B5/3KB3/1R5b/r2bQ3 b - - acd 53; acs 31200; bm Ra3+; c3 "Ra3+"; ce -476; pm Ra3+;
pv Ra3+ Bb3 Bxb3 Nxd6+ Bxd6 Nb6+ Kb7 Ke2 Rh8 Qb1 Rh2+ Kf1 Rh1+ Bg1 Rxg1+ Kxg1 Kxb6 Rxb3+ Rxb3 Qxb3+ Nb4 Kf2 Kc6 Ke3 Bc5+ Ke4 Kb5 Kf3 Bd4 Qe6 Bc5 Ke4 Ka5 Qd7 Kb6 Qa4 Kc7 Ke5 Kb6 Ke6 Bf8 Kf5 Nc6 Ke4 Bb4 Qb3 Kb5 Qd5+ Kb6 Qd7 Kc5 Qe6 Ba5 Qf6 Bb6 Qf2+ Kb5 Qe2+ Kc5 Qe3+ Kb5 Qb3+ Nb4 Qf7 Kc5 Qe8 Kc4 Qh5 Kb3 Qf7+ Ka4 Qd7+ Ka5 Qf5+ Ka6 Qe5;
Parent - - By QueensideCastler (**) [no] Date 2017-03-01 07:09 Edited 2017-03-01 12:44
Possible cook >!<

5K2/k7/4RP2/3q3p/5p1P/7P/8/8 w - - 0 0




Stockfish found possible fortress salvage in this one



3k4/1p6/p1bK4/p4Q2/1p6/8/PP6/4r3 w - - 0 0


Parent - - By QueensideCastler (**) [no] Date 2017-03-01 13:37
Stockfish is not certain about #18905

r3k3/r2p1p2/2Pp1P2/np4p1/p1n3K1/4P3/2PQ2R1/6R1 w q - 0 0


Parent - By QueensideCastler (**) [no] Date 2017-03-06 10:04
8/bp4Pk/3K1B2/R6p/2pNp1P1/p7/3p1Pn1/2r4q w - - 0 0



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