Zugzwang Collection

Code, algorithms, languages, construction...
User avatar
kingliveson
Posts: 1388
Joined: Thu Jun 10, 2010 1:22 am
Real Name: Franklin Titus
Location: 28°32'1"N 81°22'33"W

Zugzwang Collection

Post by kingliveson » Tue Feb 14, 2012 6:27 am

Is there any other Zugzwang collection?

I have these:
8/8/1p1r1k2/p1pPN1p1/P3KnP1/1P6/8/3R4 b - - bm Nxd5; id "ZPTS.01"; CCC post 27.4.2004 by Gerd Isenberg
4KBkr/7p/6PP/4P3/8/3P1p2/8/8 w - - bm g7; id "ZPTS.02"; CCC post 27.4.2004 by Gerd Isenberg
8/6B1/p5p1/Pp4kp/1P5r/5P1Q/4q1PK/8 w - - bm Qxh4; id "ZPTS.03"; CCC post 10.9.2004 by Alvaro Begue
8/8/8/2p5/1pp5/brpp4/1pprp2P/qnkbK3 w - - bm h3; id "ZPTS.04"; CCC post by Joachim Rang, mate in 15, h4 is only draw
6Q1/8/8/7k/8/8/3p1pp1/3Kbrrb w - - bm Qg7; id "ZPTS.05"; CCC post by Joachim Rang, mate in 4
n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - bm Bc7; id "ZPTS.06"; CCC post
3nQ1k1/p2P2p1/1p6/8/5q1P/8/PP6/1K6 b - - bm Kh7; id "ZPTS.07"; CCC post
8/8/8/1B6/6p1/8/4KPpp/3N2kr w - - bm Kd3 Ke3; id "ZPTS.08"; CCC post by Tim Foden, id "MES.831", white wins, 1. Kd3 g3 2. f4 Kf1 3. Kd2+ Kg1 4. Bd7 Kf1 5. Bh3 Rg1 6. Bg4 Rh1 7. Be2+ Kg1 8. Nc3 Kf2 9. Ne4+ Kg1 10. Ng5 Kf2 11. Nh3#
8/3p1p2/5Ppp/K2R2bk/4pPrr/6Pp/4B2P/3N4 w - - bm Nc3; id "ZPTS.09"; CCC post by Tim Foden, id "CCC.321751"
8/1B6/8/5p2/8/8/5Qrq/1K1R2bk w - - bm Qa7; id "ZPTS.10"; CCC post by Tim Foden, id "CCC.321759"
5R2/2K5/1pP5/4k2p/3pp3/2p4N/B4N1b/n1R1B2b w - - bm Rxc3; id "ZPTS.11"; CCC post by Tim Foden, id "CCC.321966"
4B3/8/p7/k2N4/7p/K6p/PP5P/2q5 w - - bm Ba4; id "ZPTS.12"; CCC post by Tim Foden, id "CCC.347609"
3k4/8/4K3/2R5/8/8/8/8 w - - bm Rc6; id "ZPTS.13"; CCC post
1k6/7R/2K5/8/8/8/8/8 w - - bm Rh8; id "ZPTS.14"; CCC post
8/3k4/8/8/3PK3/8/8/8 w - - bm Kd5; id "ZPTS.15"; CCC post
2k5/8/1K1P4/8/8/8/8/8 w - - bm Kc6; id "ZPTS.16"; white wins
1b6/8/8/7p/6k1/6P1/8/6K1 w - - bm Kg2; id "ZPTS.17"; CCC post by Dr. Robert Hyatt, draw
k2N2K1/8/8/8/5R2/3n4/3p4/8 w - - bm Rf7; id "ZPTS.18"; CCC post by Ed Schroeder, Troitzky
2n5/8/Pp5n/5N2/8/5k2/3P4/7K w - - bm d4; id "ZPTS.19"; CCC post by Ed Schroeder, Troitzky
8/5b2/p2k4/1p1p1p1p/1P1K1P1P/2P1PB2/8/8 w - - bm Be2; id "ZPTS.20"; CCC post by Sune Fischer, white wins
8/8/p3R3/1p5p/1P5p/6rp/5K1p/7k w - - bm Re1; id "ZPTS.21"; CCC post by Eduard Nemeth, mate in 7
8/p7/1p6/p7/kq1Q4/8/K7/8 w - - bm Qd3; id "ZPTS.22"; post in Avler chess forum
8/8/8/4N3/8/7p/8/5K1k w - - bm Ng4; id "ZPTS.23"; white mates
1r4RK/2n5/7k/8/8/8/8/8 b - - bm Ne8; id "ZPTS.24"; Polgar - Kasparov, 1996: black wins after 91. Rf8, Kg6 92. Rg8+, Kf7
8/8/1p1K4/Pp6/2k1p3/8/1P6/8 w - - bm a6; id "ZPTS.25"; Kubbel 1927, 1 ... e3 2 a7 e2 3 a8/Q e1/Q 4 Qd5+ Kb4 5 Qd3!, white wins
6k1/3p4/P2P4/8/5Kp1/1p4Q1/p5p1/b7 w - - bm Qxg2; id "ZPTS.26"; Kasparyan 1959, 1 ... Be5+ 2 Kf5! a1/Q 3 a7! Qxa7 4 Kg6! Qa1! 5 Qd5! Kh8 6 Qe4!!, white wins
8/5p2/4b1p1/7R/5K1P/2r3B1/7N/4b1k1 w - - bm Nf3; id "ZPTS.27"; Noam Elkies 1984, 1 Nf3+! Rxf3+! 2 Kxf3 Bg4+! 3 Kf4!! Bxg3+ 4 Kxg4 gxh5+ 5 Kh3!! Kf1 6 Kxg3 Ke2 7 Kf4 f6 8 Kf5 Kf3 9 Kxf6 Kg4 10 Ke5 Kh4 11 Kf4, draw
8/8/7p/2R5/4pp1K/8/8/3k2b1 w - - bm Rc4; id "ZPTS.28"; Kricheli 1986, 1 Rc4! e3 2 Rd4+! Kc2 3 Rxf4 e2 4 Re4 Kd2 5 Rxe2+ Kxe2 6 Kg4!, draw
8/1p5k/1P1p4/3p4/3Pp2p/2K1P2p/7P/8 w - - bm Kb2; id "ZPTS.29"; 1 Kb2! Kg8 2 Ka1!!, draw
 bm d6; id "ZPTS.30"; Noam Elkies 1987, 1 ... d6! 2 Bc3!! Bxb2 3 Kb3! Bxc3 4 Kc2 fxe3 5 Nd6 Ba5! 6 Nf5 Bb6 7 Ne7 Bd4 8 Nd5 Bc5 9 Nf4 Bb4(d6,e7,f8) 10 Ne6 Bc5! 11 Nd8! Bd4 12 Nb7! Bb6 13 Kc1!, mate in 16
PAWN : Knight >> Bishop >> Rook >>Queen

BB+
Posts: 1484
Joined: Thu Jun 10, 2010 4:26 am

Re: Zugzwang Collection

Post by BB+ » Tue Feb 14, 2012 6:45 am

bm d6; id "ZPTS.30"; Noam Elkies 1987, 1 ... d6! 2 Bc3!! Bxb2 3 Kb3! Bxc3 4 Kc2 fxe3 5 Nd6 Ba5! 6 Nf5 Bb6 7 Ne7 Bd4 8 Nd5 Bc5 9 Nf4 Bb4(d6,e7,f8) 10 Ne6 Bc5! 11 Nd8! Bd4 12 Nb7! Bb6 13 Kc1!, mate in 16
The FEN is missing here, but it appears in a prior post of your list.
[FEN "8/3p1N2/8/4B3/2K2p2/b3P3/pP2P3/k7 b - - 0 1"][White " "][Black " "][Result "1-0"]
{} 1... d6 {}
2. Bc3 Bxb2 3. Kb3 Bxc3 4. Kc2 fxe3 5. Nd6 Ba5 6. Nf5 Bb6 7. Ne7 Bd4 8. Nd5 Bc5 9. Nf4 Bb4 {d6,e7,f8} 10. Ne6 Bc5 11. Nd8 Bd4 12. Nb7 Bb6 13. Kc1 {mate in 16}

User923005
Posts: 616
Joined: Thu May 19, 2011 1:35 am

Re: Zugzwang Collection

Post by User923005 » Wed Feb 15, 2012 7:46 am

8/8/p1p5/1p5p/1P5p/8/PPP2K1p/4R1rk w - - bm Rf1; id "zugzwang.001";
1q1k4/2Rr4/8/2Q3K1/8/8/8/8 w - - bm Kh6; id "zugzwang.002";
7k/5K2/5P1p/3p4/6P1/3p4/8/8 w - - bm g5; id "zugzwang.003";
8/6B1/p5p1/Pp4kp/1P5r/5P1Q/4q1PK/8 w - - bm Qxh4+; id "zugzwang.004";
8/8/1p1r1k2/p1pPN1p1/P3KnP1/1P6/8/3R4 b - - bm Nxd5; id "zugzwang.005";

Adam Hair
Posts: 104
Joined: Fri Jun 11, 2010 4:29 am
Real Name: Adam Hair
Contact:

Re: Zugzwang Collection

Post by Adam Hair » Wed Feb 15, 2012 8:58 pm

User923005 wrote:8/8/p1p5/1p5p/1P5p/8/PPP2K1p/4R1rk w - - bm Rf1; id "zugzwang.001";
1q1k4/2Rr4/8/2Q3K1/8/8/8/8 w - - bm Kh6; id "zugzwang.002";
7k/5K2/5P1p/3p4/6P1/3p4/8/8 w - - bm g5; id "zugzwang.003";
8/6B1/p5p1/Pp4kp/1P5r/5P1Q/4q1PK/8 w - - bm Qxh4+; id "zugzwang.004";
8/8/1p1r1k2/p1pPN1p1/P3KnP1/1P6/8/3R4 b - - bm Nxd5; id "zugzwang.005";
I knew that you could supply some more positions ;)

User923005
Posts: 616
Joined: Thu May 19, 2011 1:35 am

Re: Zugzwang Collection

Post by User923005 » Wed Feb 15, 2012 9:38 pm

I have some millions of them, but that would be a bit large for a post.
There is a site with mutual zugzwang positions that contains all possible mutual zugzwangs for 3-6 chessmen.
There are 932,789 mutual zugzwang positions in total.
It is a simple thing to collect the pgn file from this site:
http://www.k4it.de/egtb/zugzwang.php/
and then extract the FEN setup commands into EPD positions.

User avatar
kingliveson
Posts: 1388
Joined: Thu Jun 10, 2010 1:22 am
Real Name: Franklin Titus
Location: 28°32'1"N 81°22'33"W

Re: Zugzwang Collection

Post by kingliveson » Thu Feb 16, 2012 4:44 am

Thanks BB+, User923005, Adam, and anyone else, feel free to post more, or links.
PAWN : Knight >> Bishop >> Rook >>Queen

BB+
Posts: 1484
Joined: Thu Jun 10, 2010 4:26 am

Re: Zugzwang Collection

Post by BB+ » Thu Feb 16, 2012 5:14 am

Bourzutschky8/8/8/5N1N/8/3k1qN1/8/2K4N w - - 0 1Column by Elkies on Zugzwang[White "Elkies/Hitech"][Black " "][Result "1/2-1/2"]
[FEN "8/5p2/4b1p1/7R/5K1P/2r3B1/7N/4b1k1 w - - 0 1"][Setup "1"]
1. Nf3+ Rxf3+ 2. Kxf3 Bg4+ 3. Kf4 Bxg3+ 4. Kxg4 gxh5+ 5. Kh3 *

User923005
Posts: 616
Joined: Thu May 19, 2011 1:35 am

Re: Zugzwang Collection

Post by User923005 » Thu Feb 16, 2012 11:22 pm

WIKI entries for zugzwang also have lots of distinct zugzwang positions

BB+
Posts: 1484
Joined: Thu Jun 10, 2010 4:26 am

Re: Zugzwang Collection

Post by BB+ » Fri Feb 17, 2012 4:03 am

Zugzwang (on move 3) plus bishop underpromotion (on move 4).
[FEN "rk6/p2p4/KPRp4/8/3P4/8/8/8 w - - 0 1"]
[White "Selesniev"][Result "1-0"]
1. Rc8+ Kxc8 2. b7+ Kb8 3. d5 Kc7 4. bxa8=B

User avatar
kingliveson
Posts: 1388
Joined: Thu Jun 10, 2010 1:22 am
Real Name: Franklin Titus
Location: 28°32'1"N 81°22'33"W

Re: Zugzwang Collection

Post by kingliveson » Fri Feb 17, 2012 4:32 am

BB+ wrote:Zugzwang (on move 3) plus bishop underpromotion (on move 4).
[FEN "rk6/p2p4/KPRp4/8/3P4/8/8/8 w - - 0 1"]
[White "Selesniev"][Result "1-0"]
1. Rc8+ Kxc8 2. b7+ Kb8 3. d5 Kc7 4. bxa8=B
Komodo 4 does not see this one, not even at this point:
rk6/pP1p4/K2p4/3P4/8/8/8/8 b - - 0 3

1 +0.00 3.... Kc7 (0.00)
2 +0.00 3.... Kc7 4.bxa8=Q (0.00)
3 +0.00 3.... Kc7 4.bxa8=Q (0.00)
4 +0.00 3.... Kc7 4.bxa8=Q (0.00)
5 +0.00 3.... Kc7 4.bxa8=Q (0.00)
6 +0.00 3.... Kc7 4.bxa8=Q (0.00)
7 +0.00 3.... Kc7 4.bxa8=Q (0.00)
8 +0.01 3.... Kc7 4.bxa8=N+ Kb8 5.Nc7 Kxc7 6.Kxa7 Kd8 7.Kb7 Ke8 8.Kc8 Ke7 9.Kc7 (0.00)
9 +0.05 3.... Kc7 4.bxa8=N+ Kb8 5.Nc7 Kxc7 6.Kxa7 Kc8 7.Ka6 Kc7 8.Ka7 (0.00)
10 +0.00 3.... Kc7 4.bxa8=N+ Kb8 5.Nc7 Kxc7 6.Kxa7 Kd8 7.Kb7 Ke7 8.Kc7 Ke8 9.Kxd6 Kd8 10.Kc5 Ke7 (0.01)
11 +0.00 3.... Kc7 4.bxa8=N+ Kb8 5.Nc7 Kxc7 6.Kxa7 Kd8 7.Kb7 Ke7 8.Kc7 Ke8 9.Kxd6 Kd8 10.Kc5 Ke7 11.Kc4 Kf6 (0.01)
12 +0.00 3.... Kc7 4.bxa8=N+ Kb8 5.Nc7 Kxc7 6.Kxa7 Kd8 7.Kb7 Ke7 8.Kc7 Ke8 9.Kxd6 Kd8 10.Kc5 Ke7 11.Kc4 Kf6 (0.01)
13 +0.00 3.... Kc7 4.bxa8=N+ Kb8 5.Nc7 Kxc7 6.Kxa7 Kd8 7.Kb7 Ke7 8.Kc7 Ke8 9.Kxd6 Kd8 10.Kc5 Ke7 11.Kc4 Kf6 12.Kb5 Kf5 13.Kc5 (0.01)
14 +0.00 3.... Kc7 4.bxa8=N+ Kb8 5.Nc7 Kxc7 6.Kxa7 Kd8 7.Kb7 Ke7 8.Kc7 Ke8 9.Kxd6 Kd8 10.Kc5 Ke7 11.Kc4 Kf6 12.Kb5 Kf5 13.Kc5 Ke5 (0.01)
15 +0.00 3.... Kc7 4.bxa8=N+ Kb8 5.Nc7 Kxc7 6.Kxa7 Kd8 7.Kb7 Ke7 8.Kc7 Ke8 9.Kxd6 Kd8 10.Kc5 Ke7 11.Kc4 Kf6 12.Kb5 Kf5 13.Kc5 Ke5 14.d6 (0.01)
16 +0.00 3.... Kc7 4.bxa8=Q (0.01)
17 +0.00 3.... Kc7 4.bxa8=Q (0.01)
18 +0.00 3.... Kc7 4.bxa8=Q (0.01)
19 +0.00 3.... Kc7 4.bxa8=Q (0.02)
20 +0.00 3.... Kc7 4.bxa8=Q (0.02)
21 +0.00 3.... Kc7 4.bxa8=Q (0.02)
22 +0.00 3.... Kc7 4.bxa8=Q (0.03)
23 +0.00 3.... Kc7 4.bxa8=Q (0.04)
24 +0.00 3.... Kc7 4.bxa8=Q (0.06)
25 +0.00 3.... Kc7 4.bxa8=Q (0.09)
26 +0.00 3.... Kc7 4.bxa8=Q (0.18)
27 +0.00 3.... Kc7 4.bxa8=Q (0.41)
28 +0.00 3.... Kc7 4.bxa8=Q (0.89)
29 +0.00 3.... Kc7 4.bxa8=Q (1.82)
30 +0.00 3.... Kc7 4.bxa8=Q (3.89)
31 +0.00 3.... Kc7 4.bxa8=Q (5.61)
32 +0.00 3.... Kc7 4.bxa8=Q (10.75)
33 +0.00 3.... Kc7 4.bxa8=Q (21.78)
34 +0.00 3.... Kc7 4.bxa8=Q (46.14)
35 +0.00 3.... Kc7 4.bxa8=Q (79.82)
36 +0.00 3.... Kc7 4.bxa8=Q (152.23)

Crafty 23.4 struggles with the initial position, but sees the win after Rc8+.
PAWN : Knight >> Bishop >> Rook >>Queen

Post Reply