% Francois Labelle & computer, August 19, 2017 % All 43 PG-6.5 with exactly 1 checkmate solution, and at least 1 non-checkmate % solution. % Comment: % % The example 1.e3 h5 2.Bc4 h4 3.Bxf7+ Kxf7 4.Qf3+ Kg6 5.Qf4 Kh5 6.g3 g6 7.g4# % was found by Francois Perruchaud in 2004. (Forsyth-Edwards Notation, followed by the same list in ascii diagrams, followed by the checkmate solutions sorted by moves). rn1q1bnr/ppp1ppQp/4b3/5k2/3pP3/1N1P4/PPP2PPP/R1B1KBNR rn1q1bnr/ppp1ppQp/4b3/5k2/3pP3/3P1N2/PPP2PPP/R1B1KBNR rn1q1bnr/ppp1ppQp/4b3/5k2/3pP3/3P4/PPP3PP/RNB1KBNR rnb2bnr/pppQpppp/8/4k1B1/4pP2/8/PPP1P1PP/R3KBNR rnb2bnr/pppQpppp/8/B1k5/1Pp1P3/8/P1P2PPP/RN2K1NR rnb2bnr/pppQpppp/8/B1k5/1Pp5/8/P3PPPP/RN2KBNR rnb2bnr/pppp1ppp/4Q3/6k1/4pPPq/4P3/PPPP3P/RNBK1BNR rnb2bnr/pppp1ppp/4Q3/6k1/4pPPq/4P3/PPPPK2P/RNB2BNR rnbq1bn1/ppppp2Q/5p2/6k1/5Pp1/4P3/PPPP2PP/RNB1KBNR rnbq1bn1/ppppp2Q/5p2/6k1/6pP/4P3/PPPP1PP1/RNB1KBNR rnbq1bnQ/ppppp3/5p2/6k1/5Pp1/3BP3/PPPP2PP/RNB1K1NR rnbq1bnQ/ppppp3/5p2/6k1/6pP/3BP3/PPPP1PP1/RNB1K1NR rnbq1bnr/pQp1pppp/3p4/2k5/2pP4/4P3/PPP1KPPP/RNB3NR rnbq1bnr/pQp1pppp/3p4/2k5/2pP4/4P3/PPP1NPPP/RNB1K2R rnbq1bnr/pQp1pppp/3p4/2k5/2pP4/4P3/PPP2PPP/RNBK2NR rnbq1bnr/pp1pp1pp/2Q5/3Bkp2/2pP4/4P3/PPP2PPP/RNB1K1NR rnbq1bnr/pp4pp/2Q5/4kp2/4pP2/4P3/PPPP2PP/RNB1KBNR rnbq1bnr/ppp1p2p/3p2Q1/4k3/2B2Pp1/4P3/PPPP2PP/RNB1K1NR rnbq1bnr/ppp1pQ1p/3p4/3Bk3/5Pp1/4P3/PPPP2PP/RNB1K1NR rnbq1bnr/ppp1pQ1p/3p4/4k3/2B2Pp1/3PP3/PPP3PP/RNB1K1NR rnbq1bnr/ppp4p/6Q1/3pk3/3Pp3/2P5/PP2PPPP/RNB1KBNR rnbq1bnr/pppQp1pp/5p2/1B2k3/3Pp3/5P2/PPP3PP/RNB1K1NR rnbq1bnr/pppQp1pp/5p2/1B2k3/3Pp3/8/PPP1KPPP/RNB3NR rnbq1bnr/pppQp1pp/5p2/1B2k3/3Pp3/8/PPP1NPPP/RNB1K2R rnbq1bnr/pppQp1pp/5p2/1B2k3/3Pp3/8/PPP2PPP/RNBK2NR rnbq1bnr/pppQp1pp/5p2/1B2k3/4pP2/3P4/PPP3PP/RNB1K1NR rnbq1bnr/pppp1ppp/2Q5/4k3/3NpP2/4P3/PPPP2PP/RNB1KB1R rnbq1bnr/pppp1ppp/2Q5/4k3/4pP2/4P1N1/PPPP2PP/RNB1KB1R rnbq1bnr/pppp1ppp/2Q5/4k3/4pPP1/4P3/PPPP3P/RNBK1BNR rnbq1bnr/pppp1ppp/2Q5/4k3/4pPP1/4P3/PPPPB2P/RNB1K1NR rnbq1bnr/pppp1ppp/2Q5/4k3/4pPP1/4P3/PPPPK2P/RNB2BNR rnbq1bnr/pppp1ppp/2Q5/4k3/4pPP1/4P3/PPPPN2P/RNB1KB1R rnbq1bnr/pppp1ppp/6Q1/2k5/2PPp3/2K5/PP2PPPP/RNB2BNR rnbq1bnr/ppppp1Q1/8/7k/4P1Pp/8/PPPP1P1P/RNB1K1NR rnbq1bnr/ppppp1Q1/8/7k/6Pp/4P3/PPPP1P1P/RNB1K1NR rnbq1bnr/ppppp2p/7Q/5kB1/3PPp2/5P2/PPP3PP/RN2KBNR rnbq1bnr/ppppp3/5p2/6k1/5Pp1/3BP2Q/PPPP2PP/RNB1K1NR rnbq1bnr/ppppp3/6p1/7k/4PQPp/8/PPPP1P1P/RNB1K1NR rnbq1bnr/ppppp3/6p1/7k/5QPp/4P3/PPPP1P1P/RNB1K1NR rnbq2nr/ppp2ppp/5Q2/2bk4/3pP3/3P4/PPP2PPP/RN2KBNR rnbq2nr/pppp1ppp/4Q3/2k5/1b1Pp1P1/4P3/PPP2P1P/RNBK1BNR rnbq2nr/pppp1ppp/Q7/2k5/1b1Pp3/2N1P3/PPP2PPP/RNB1KB1R rnbqBbnr/pppQp1pp/5p2/4k3/3Pp3/8/PPP2PPP/RNB1K1NR _________________ _________________ _________________ _________________ | | | | | | r n . q . b n r | r n . q . b n r | r n . q . b n r | r n b . . b n r | | p p p . p p Q p | p p p . p p Q p | p p p . p p Q p | p p p Q p p p p | | . . . . b . . . | . . . . b . . . | . . . . b . . . | . . . . . . . . | | . . . . . k . . | . . . . . k . . | . . . . . k . . | . . . . k . B . | | . . . p P . . . | . . . p P . . . | . . . p P . . . | . . . . p P . . | | . N . P . . . . | . . . P . N . . | . . . P . . . . | . . . . . . . . | | P P P . . P P P | P P P . . P P P | P P P . . . P P | P P P . P . P P | | R . B . K B N R | R . B . K B N R | R N B . K B N R | R . . . K B N R | |_________________|_________________|_________________|_________________| | | | | | | r n b . . b n r | r n b . . b n r | r n b . . b n r | r n b . . b n r | | p p p Q p p p p | p p p Q p p p p | p p p p . p p p | p p p p . p p p | | . . . . . . . . | . . . . . . . . | . . . . Q . . . | . . . . Q . . . | | B . k . . . . . | B . k . . . . . | . . . . . . k . | . . . . . . k . | | . P p . P . . . | . P p . . . . . | . . . . p P P q | . . . . p P P q | | . . . . . . . . | . . . . . . . . | . . . . P . . . | . . . . P . . . | | P . P . . P P P | P . . . P P P P | P P P P . . . P | P P P P K . . P | | R N . . K . N R | R N . . K B N R | R N B K . B N R | R N B . . B N R | |_________________|_________________|_________________|_________________| | | | | | | r n b q . b n . | r n b q . b n . | r n b q . b n Q | r n b q . b n Q | | p p p p p . . Q | p p p p p . . Q | p p p p p . . . | p p p p p . . . | | . . . . . p . . | . . . . . p . . | . . . . . p . . | . . . . . p . . | | . . . . . . k . | . . . . . . k . | . . . . . . k . | . . . . . . k . | | . . . . . P p . | . . . . . . p P | . . . . . P p . | . . . . . . p P | | . . . . P . . . | . . . . P . . . | . . . B P . . . | . . . B P . . . | | P P P P . . P P | P P P P . P P . | P P P P . . P P | P P P P . P P . | | R N B . K B N R | R N B . K B N R | R N B . K . N R | R N B . K . N R | |_________________|_________________|_________________|_________________| | | | | | | r n b q . b n r | r n b q . b n r | r n b q . b n r | r n b q . b n r | | p Q p . p p p p | p Q p . p p p p | p Q p . p p p p | p p . p p . p p | | . . . p . . . . | . . . p . . . . | . . . p . . . . | . . Q . . . . . | | . . k . . . . . | . . k . . . . . | . . k . . . . . | . . . B k p . . | | . . p P . . . . | . . p P . . . . | . . p P . . . . | . . p P . . . . | | . . . . P . . . | . . . . P . . . | . . . . P . . . | . . . . P . . . | | P P P . K P P P | P P P . N P P P | P P P . . P P P | P P P . . P P P | | R N B . . . N R | R N B . K . . R | R N B K . . N R | R N B . K . N R | |_________________|_________________|_________________|_________________| | | | | | | r n b q . b n r | r n b q . b n r | r n b q . b n r | r n b q . b n r | | p p . . . . p p | p p p . p . . p | p p p . p Q . p | p p p . p Q . p | | . . Q . . . . . | . . . p . . Q . | . . . p . . . . | . . . p . . . . | | . . . . k p . . | . . . . k . . . | . . . B k . . . | . . . . k . . . | | . . . . p P . . | . . B . . P p . | . . . . . P p . | . . B . . P p . | | . . . . P . . . | . . . . P . . . | . . . . P . . . | . . . P P . . . | | P P P P . . P P | P P P P . . P P | P P P P . . P P | P P P . . . P P | | R N B . K B N R | R N B . K . N R | R N B . K . N R | R N B . K . N R | |_________________|_________________|_________________|_________________| | | | | | | r n b q . b n r | r n b q . b n r | r n b q . b n r | r n b q . b n r | | p p p . . . . p | p p p Q p . p p | p p p Q p . p p | p p p Q p . p p | | . . . . . . Q . | . . . . . p . . | . . . . . p . . | . . . . . p . . | | . . . p k . . . | . B . . k . . . | . B . . k . . . | . B . . k . . . | | . . . P p . . . | . . . P p . . . | . . . P p . . . | . . . P p . . . | | . . P . . . . . | . . . . . P . . | . . . . . . . . | . . . . . . . . | | P P . . P P P P | P P P . . . P P | P P P . K P P P | P P P . N P P P | | R N B . K B N R | R N B . K . N R | R N B . . . N R | R N B . K . . R | |_________________|_________________|_________________|_________________| | | | | | | r n b q . b n r | r n b q . b n r | r n b q . b n r | r n b q . b n r | | p p p Q p . p p | p p p Q p . p p | p p p p . p p p | p p p p . p p p | | . . . . . p . . | . . . . . p . . | . . Q . . . . . | . . Q . . . . . | | . B . . k . . . | . B . . k . . . | . . . . k . . . | . . . . k . . . | | . . . P p . . . | . . . . p P . . | . . . N p P . . | . . . . p P . . | | . . . . . . . . | . . . P . . . . | . . . . P . . . | . . . . P . N . | | P P P . . P P P | P P P . . . P P | P P P P . . P P | P P P P . . P P | | R N B K . . N R | R N B . K . N R | R N B . K B . R | R N B . K B . R | |_________________|_________________|_________________|_________________| | | | | | | r n b q . b n r | r n b q . b n r | r n b q . b n r | r n b q . b n r | | p p p p . p p p | p p p p . p p p | p p p p . p p p | p p p p . p p p | | . . Q . . . . . | . . Q . . . . . | . . Q . . . . . | . . Q . . . . . | | . . . . k . . . | . . . . k . . . | . . . . k . . . | . . . . k . . . | | . . . . p P P . | . . . . p P P . | . . . . p P P . | . . . . p P P . | | . . . . P . . . | . . . . P . . . | . . . . P . . . | . . . . P . . . | | P P P P . . . P | P P P P B . . P | P P P P K . . P | P P P P N . . P | | R N B K . B N R | R N B . K . N R | R N B . . B N R | R N B . K B . R | |_________________|_________________|_________________|_________________| | | | | | | r n b q . b n r | r n b q . b n r | r n b q . b n r | r n b q . b n r | | p p p p . p p p | p p p p p . Q . | p p p p p . Q . | p p p p p . . p | | . . . . . . Q . | . . . . . . . . | . . . . . . . . | . . . . . . . Q | | . . k . . . . . | . . . . . . . k | . . . . . . . k | . . . . . k B . | | . . P P p . . . | . . . . P . P p | . . . . . . P p | . . . P P p . . | | . . K . . . . . | . . . . . . . . | . . . . P . . . | . . . . . P . . | | P P . . P P P P | P P P P . P . P | P P P P . P . P | P P P . . . P P | | R N B . . B N R | R N B . K . N R | R N B . K . N R | R N . . K B N R | |_________________|_________________|_________________|_________________| | | | | | | r n b q . b n r | r n b q . b n r | r n b q . b n r | r n b q . . n r | | p p p p p . . . | p p p p p . . . | p p p p p . . . | p p p . . p p p | | . . . . . p . . | . . . . . . p . | . . . . . . p . | . . . . . Q . . | | . . . . . . k . | . . . . . . . k | . . . . . . . k | . . b k . . . . | | . . . . . P p . | . . . . P Q P p | . . . . . Q P p | . . . p P . . . | | . . . B P . . Q | . . . . . . . . | . . . . P . . . | . . . P . . . . | | P P P P . . P P | P P P P . P . P | P P P P . P . P | P P P . . P P P | | R N B . K . N R | R N B . K . N R | R N B . K . N R | R N . . K B N R | |_________________|_________________|_________________|_________________| | | | | | r n b q . . n r | r n b q . . n r | r n b q B b n r | | p p p p . p p p | p p p p . p p p | p p p Q p . p p | | . . . . Q . . . | Q . . . . . . . | . . . . . p . . | | . . k . . . . . | . . k . . . . . | . . . . k . . . | | . b . P p . P . | . b . P p . . . | . . . P p . . . | | . . . . P . . . | . . N . P . . . | . . . . . . . . | | P P P . . P . P | P P P . . P P P | P P P . . P P P | | R N B K . B N R | R N B . K B . R | R N B . K . N R | |_________________|_________________|_________________| 1. Nc3 d5 2. Ne4 dxe4 3. f3 Qxd2+ 4. Bxd2 Kd7 5. Bg5+ Ke6 6. Qd7+ Ke5 7. f4# 1. c3 d5 2. c4 dxc4 3. b3 Qxd2+ 4. Bxd2 Kd7 5. Ba5+ Kc6 6. Qd7+ Kc5 7. b4# 1. c3 e5 2. Qb3 Ke7 3. Qxf7+ Kd6 4. Qxg7 e4 5. Qg6+ Ke5 6. d3 d5 7. d4# 1. c4 e6 2. Qc2 Ke7 3. Qg6 Kd6 4. d3 Kc5 5. Kd2 e5 6. Kc3 e4 7. d4# 1. d3 d5 2. Bg5 d4 3. Bxe7 Kxe7 4. e3 Ke6 5. Qf3 Bc5 6. Qf6+ Kd5 7. e4# 1. d4 g5 2. Bxg5 f5 3. e3 Kf7 4. Qh5+ Ke6 5. f3 f4 6. Qh6+ Kf5 7. e4# 1. e3 d5 2. Qg4 d4 3. Qxg7 Kd7 4. d3 Ke6 5. Nd2 Kf5 6. Nb3 Be6 7. e4# 1. e3 d5 2. Qg4 d4 3. Qxg7 Kd7 4. d3 Ke6 5. Nd2 Kf5 6. Ndf3 Be6 7. e4# 1. e3 d5 2. Qg4 d4 3. Qxg7 Kd7 4. f4 Ke6 5. f5+ Kxf5 6. d3 Be6 7. e4# 1. e3 d6 2. Bc4 Kd7 3. d3 Kc6 4. Qf3+ Kc5 5. Kd1 b5 6. Qb7 bxc4 7. d4# 1. e3 d6 2. Bc4 Kd7 3. d3 Kc6 4. Qf3+ Kc5 5. Ke2 b5 6. Qb7 bxc4 7. d4# 1. e3 d6 2. Bc4 Kd7 3. d3 Kc6 4. Qf3+ Kc5 5. Ne2 b5 6. Qb7 bxc4 7. d4# 1. e3 d6 2. Qh5 Kd7 3. f3 Ke6 4. Qxf7+ Ke5 5. Bc4 g5 6. Bd5 g4 7. f4# 1. e3 d6 2. Qh5 Kd7 3. f3 Ke6 4. Qxf7+ Ke5 5. Bc4 g5 6. Qg6 g4 7. f4# 1. e3 d6 2. Qh5 Kd7 3. f3 Ke6 4. Qxf7+ Ke5 5. Bc4 g5 6. d3 g4 7. f4# 1. e3 e5 2. Ne2 Bb4 3. Nec3 Ke7 4. Qe2 Kd6 5. Qa6+ Kc5 6. d3 e4 7. d4# 1. e3 e5 2. Qf3 Ke7 3. Be2 Ke6 4. Qc6+ Kf5 5. f3 e4 6. g4+ Ke5 7. f4# 1. e3 e5 2. Qf3 Ke7 3. Kd1 Ke6 4. Qc6+ Kf5 5. f3 e4 6. g4+ Ke5 7. f4# 1. e3 e5 2. Qf3 Ke7 3. Ke2 Ke6 4. Qc6+ Kf5 5. f3 e4 6. g4+ Ke5 7. f4# 1. e3 e5 2. Qf3 Ke7 3. Ne2 Ke6 4. Qc6+ Kf5 5. f3 e4 6. Nd4+ Ke5 7. f4# 1. e3 e5 2. Qf3 Ke7 3. Ne2 Ke6 4. Qc6+ Kf5 5. f3 e4 6. Ng3+ Ke5 7. f4# 1. e3 e5 2. Qf3 Ke7 3. Ne2 Ke6 4. Qc6+ Kf5 5. f3 e4 6. g4+ Ke5 7. f4# 1. e3 e5 2. Qg4 Bb4 3. Kd1 Ke7 4. d3 Kd6 5. Qe6+ Kc5 6. g4 e4 7. d4# 1. e3 e5 2. Qg4 Ke7 3. Qxd7+ Kf6 4. Qxc7 e4 5. Qc6+ Ke5 6. f3 f5 7. f4# 1. e3 e5 2. Qg4 Qh4 3. Kd1 Ke7 4. f3 Kf6 5. Qe6+ Kg5 6. g4 e4 7. f4# 1. e3 e5 2. Qg4 Qh4 3. Ke2 Ke7 4. f3 Kf6 5. Qe6+ Kg5 6. g4 e4 7. f4# 1. e3 f5 2. Qf3 Kf7 3. Bc4+ Kf6 4. d3 c5 5. Qc6+ Ke5 6. Bd5 c4 7. d4# 1. e3 g5 2. Qh5 g4 3. Qxh7 f6 4. Qh3 Kf7 5. f3 Kg6 6. Bd3+ Kg5 7. f4# 1. e3 g5 2. Qh5 g4 3. Qxh7 f6 4. Qxh8 Kf7 5. f3 Kg6 6. Bd3+ Kg5 7. f4# 1. e3 g5 2. Qh5 g4 3. Qxh7 f6 4. Qxh8 Kf7 5. f3 Kg6 6. Qh7+ Kg5 7. f4# 1. e3 g5 2. Qh5 g4 3. Qxh7 f6 4. Qxh8 Kf7 5. h3 Kg6 6. Bd3+ Kg5 7. h4# 1. e3 g5 2. Qh5 g4 3. Qxh7 f6 4. Qxh8 Kf7 5. h3 Kg6 6. Qh7+ Kg5 7. h4# 1. e3 h5 2. Bc4 h4 3. Bxf7+ Kxf7 4. Qf3+ Kg6 5. Qf4 Kh5 6. g3 g6 7. g4# 1. e3 h5 2. Bc4 h4 3. Bxf7+ Kxf7 4. g3 Kg6 5. Qg4+ Kh6 6. Qxg7+ Kh5 7. g4# 1. e4 d5 2. Bc4 dxc4 3. b3 Qxd2+ 4. Bxd2 Kd7 5. Ba5+ Kc6 6. Qd7+ Kc5 7. b4# 1. e4 f6 2. Bb5 Kf7 3. d3 Ke6 4. Qg4+ Ke5 5. Kd1 d5 6. Qd7 dxe4 7. d4# 1. e4 f6 2. Bb5 Kf7 3. d3 Ke6 4. Qg4+ Ke5 5. Ke2 d5 6. Qd7 dxe4 7. d4# 1. e4 f6 2. Bb5 Kf7 3. d3 Ke6 4. Qg4+ Ke5 5. Ne2 d5 6. Qd7 dxe4 7. d4# 1. e4 f6 2. Bb5 Kf7 3. d3 Ke6 4. Qg4+ Ke5 5. f3 d5 6. Qd7 dxe4 7. d4# 1. e4 f6 2. Bb5 Kf7 3. d3 Ke6 4. Qg4+ Ke5 5. f3 d5 6. Qd7 dxe4 7. f4# 1. e4 f6 2. Bb5 Kf7 3. d3 d5 4. Be8+ Ke6 5. Qg4+ Ke5 6. Qd7 dxe4 7. d4# 1. e4 h5 2. Bc4 h4 3. Bxf7+ Kxf7 4. Qf3+ Kg6 5. Qf4 Kh5 6. g3 g6 7. g4# 1. e4 h5 2. Bc4 h4 3. Bxf7+ Kxf7 4. g3 Kg6 5. Qg4+ Kh6 6. Qxg7+ Kh5 7. g4#