MESON Chess Problem Database
Problem Display
PID: 132376 (6nn/3Qp2R/4Pk2/4p1pP/8/p3Np1b/B4B1N/6K1 w - - 0 1)
Watson, George
The Field, 1956
(First published on Thu Nov 15 1956)
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Bf1
- 2.Shg4#
- 1...Bg2
- 2.Shg4#
- 1...Bg4
- 2.Shxg4#
- 1...Bf5
- 2.Sd5#
- 1...Bxe6
- 2.Qxe6#
- 1...Sh6
- 2.Qxe7#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...e4
- 2.Qd4#
- 1...g4
- 2.Bh4#
- 1...Bf1
- Tries
- 1.Kh1?
- 1...Bxe6
- 2.Qxe6#
- 1...e4
- 2.Qd4#
- 1...g4
- 2.Bh4#
- 1...Bf1
- 2.Shg4#
- 1...Bg4
- 2.Shxg4#
- 1...Bf5
- 2.Sd5#
- 1...Sh6
- 2.Qxe7#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...Bg2+!
- 1...Bxe6
- 1.Bb3?
- 1...Bxe6
- 2.Qxe6#
- 1...e4
- 2.Qd4#
- 1...g4
- 2.Bh4#
- 1...Bg2
- 2.Shg4#
- 1...Bf1
- 2.Shg4#
- 1...Bg4
- 2.Shxg4#
- 1...Bf5
- 2.Sd5#
- 1...Sh6
- 2.Qxe7#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...a2!
- 1...Bxe6
- 1.Bc4?
- 1...Bxe6
- 2.Qxe6#
- 1...e4
- 2.Qd4#
- 1...g4
- 2.Bh4#
- 1...Bg2
- 2.Shg4#
- 1...Bf1
- 2.Shg4#
- 1...Bg4
- 2.Shxg4#
- 1...Bf5
- 2.Sd5#
- 1...Sh6
- 2.Qxe7#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...a2!
- 1...Bxe6
- 1.Be1?
- 1...Bxe6
- 2.Qxe6#
- 1...e4
- 2.Bc3#
- 2.Qd4#
- 1...g4
- 2.Bh4#
- 1...Bg2
- 2.Shg4#
- 1...Bf1
- 2.Shg4#
- 1...Bg4
- 2.Shxg4#
- 1...Bf5
- 2.Sd5#
- 1...Sh6
- 2.Qxe7#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...f2+!
- 1...Bxe6
- 1.Bg3?
- 1...Bxe6
- 2.Qxe6#
- 1...g4
- 2.Bh4#
- 1...Bg2
- 2.Shg4#
- 1...Bf1
- 2.Shg4#
- 1...Bg4
- 2.Shxg4#
- 1...Bf5
- 2.Sd5#
- 1...Sh6
- 2.Qxe7#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...e4
- 2.Qd4#
- 1...f2+!
- 1...Bxe6
- 1.Qc6?
- 1...Bxe6
- 2.Shg4#
- 2.Qxe6#
- 1...e4
- 2.Qc3#
- 1...g4
- 2.Bh4#
- 1...Bf5
- 2.Sd5#
- 1...Bf1
- 2.Shg4#
- 2.Qxf3#
- 1...Bg2
- 2.Shg4#
- 1...Bg4
- 2.Shxg4#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...Sh6!
- 1...Bxe6
- 1.Qd6?
- 1...Bxe6
- 2.Shg4#
- 2.Qxe6#
- 1...g4
- 2.Bh4#
- 1...Bf5
- 2.Sd5#
- 1...Bf1
- 2.Shg4#
- 1...Bg2
- 2.Shg4#
- 1...Bg4
- 2.Shxg4#
- 1...Sh6
- 2.Qxe7#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...e4
- 2.Qd4#
- 1...exd6!
- 1...Bxe6
- 1.Kh1?
- Keys
- 1.Qc8!
- 1...Bxe6
- 2.Qxe6#
- 1...e4
- 2.Qc3#
- 1...g4
- 2.Bh4#
- 1...Bf5
- 2.Sd5#
- 1...Bf1
- 2.Shg4#
- 1...Bg2
- 2.Shg4#
- 1...Bg4
- 2.Shxg4#
- 1...Sh6
- 2.Qxh8#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...Bxe6
- 1.Qc8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(c);N_GUARD::S(D)
- B(c);N_GUARD::S(D),XB(c)
- B(c);SBLOCK::S(E)
- B(c);OGATE,XP(G)::QAR1(H),XB(c)
- S(h);N_GUARD::QAB1(H),XP(g)
- S(i);N_GUARD::R1(I)
- S(i);N_GUARD::R1(I),XS(i)
- P(d);OGATEB::QAB(H)
- P(e);OGATEB::B(C)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- B(c);OGATE,XP(G)::QAR1(H),XB(c)
- P(d);OGATEB::QAB(H)
- P(e);OGATEB::B(C)
- B(c);N_GUARD::S(D)
- B(c);N_GUARD::S(D),XB(c)
- B(c);SBLOCK::S(E)
- S(h);N_GUARD::QAB1(H),XP(g)
- S(i);N_GUARD::R1(I)
- S(i);N_GUARD::R1(I),XS(i)
- Refutation
- B(c);CHECK
- Try
- B(B);
- Vars
- B(c);OGATE,XP(G)::QAR1(H),XB(c)
- P(d);OGATEB::QAB(H)
- P(e);OGATEB::B(C)
- B(c);N_GUARD::S(D)
- B(c);N_GUARD::S(D),XB(c)
- B(c);SBLOCK::S(E)
- S(h);N_GUARD::QAB1(H),XP(g)
- S(i);N_GUARD::R1(I)
- S(i);N_GUARD::R1(I),XS(i)
- Refutation
- P(a);
- Try
- B(B);
- Vars
- B(c);OGATE,XP(G)::QAR1(H),XB(c)
- P(d);OGATEB::QAB(H)
- P(e);OGATEB::B(C)
- B(c);N_GUARD::S(D)
- B(c);N_GUARD::S(D),XB(c)
- B(c);SBLOCK::S(E)
- S(h);N_GUARD::QAB1(H),XP(g)
- S(i);N_GUARD::R1(I)
- S(i);N_GUARD::R1(I),XS(i)
- Refutation
- P(a);
- Try
- B(C);
- Vars
- B(c);OGATE,XP(G)::QAR1(H),XB(c)
- P(e);OGATEB::B(C)
- B(c);N_GUARD::S(D)
- B(c);N_GUARD::S(D),XB(c)
- B(c);SBLOCK::S(E)
- S(h);N_GUARD::QAB1(H),XP(g)
- S(i);N_GUARD::R1(I)
- S(i);N_GUARD::R1(I),XS(i)
- Refutation
- P(b);CHECK
- Try
- B(C);
- Vars
- B(c);OGATE,XP(G)::QAR1(H),XB(c)
- P(e);OGATEB::B(C)
- B(c);N_GUARD::S(D)
- B(c);N_GUARD::S(D),XB(c)
- B(c);SBLOCK::S(E)
- S(h);N_GUARD::QAB1(H),XP(g)
- S(i);N_GUARD::R1(I)
- S(i);N_GUARD::R1(I),XS(i)
- P(d);OGATEB::QAB(H)
- Refutation
- P(b);CHECK
- Try
- Q(H);
- Vars
- P(d);OGATEB::QAB(H)
- P(e);OGATEB::B(C)
- B(c);SBLOCK::S(E)
- B(c);N_GUARD::S(D)
- B(c);N_GUARD::S(D),XB(c)
- S(i);N_GUARD::R1(I)
- S(i);N_GUARD::R1(I),XS(i)
- Refutation
- S(h);
- Try
- Q(H);
- Vars
- P(e);OGATEB::B(C)
- B(c);SBLOCK::S(E)
- B(c);N_GUARD::S(D)
- B(c);N_GUARD::S(D),XB(c)
- S(h);N_GUARD::QAB1(H),XP(g)
- S(i);N_GUARD::R1(I)
- S(i);N_GUARD::R1(I),XS(i)
- P(d);OGATEB::QAB(H)
- Refutation
- P(g);XQ(H)
- Try
- Actual
- Q(H);
- Vars
- B(c);OGATE,XP(G)::QAR1(H),XB(c)
- P(d);OGATEB::QAB(H)
- P(e);OGATEB::B(C)
- B(c);SBLOCK::S(E)
- B(c);N_GUARD::S(D)
- B(c);N_GUARD::S(D),XB(c)
- S(h);OGATE::QAB(H),XS(i)
- S(i);N_GUARD::R1(I)
- S(i);N_GUARD::R1(I),XS(i)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).