MESON Chess Problem Database
Problem Display
PID: 247612 (4b3/4p3/2n5/1P1knQR1/p2pNRP1/Bp2p3/1K2B3/8 w - - 0 1)
Watson, Frederick W
British Chess Magazine, 1932
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Bh5
- 2.Qd7#
- 1...Bg6
- 2.Qd7#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sb4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...d3
- 2.Sc3#
- 1...e6
- 2.Sf6#
- 1...Bh5
- Tries
- 1.Ka1?
- 1...d3
- 2.Sc3#
- 1...Bh5
- 2.Qd7#
- 1...Bg6
- 2.Qd7#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sb4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...e6
- 2.Sf6#
- 1...b2+!
- 1...d3
- 1.Kb1?
- 1...d3
- 2.Sc3#
- 1...Bh5
- 2.Qd7#
- 1...Bg6
- 2.Qd7#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sb4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...e6
- 2.Sf6#
- 1...b2!
- 1...d3
- 1.Kc1?
- 1...d3
- 2.Sc3#
- 1...Bh5
- 2.Qd7#
- 1...Bg6
- 2.Qd7#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sb4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...e6
- 2.Sf6#
- 1...b2+!
- 1...d3
- 1.Sd2?
- threat
- 2.Bf3#
- 2.Bc4#
- 1...Sb4
- 2.Qxe5#
- 1...Sa5
- 2.Bf3#
- 2.Qxe5#
- 1...d3
- 2.Bf3#
- 1...exd2!
- threat
- 1.Sf2?
- 1...Sb4
- 2.Qxe5#
- 1...Bh5
- 2.Qd7#
- 1...Bg6
- 2.Qd7#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...d3
- 2.Bf3#
- 1...e6
- 2.Qe4#
- 1...exf2!
- 1...Sb4
- 1.Sc5?
- threat
- 2.Qe6#
- 1...Sb4
- 2.Qxe5#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sd8
- 2.Qxe5#
- 1...e6
- 2.Qxe6#
- 1...Kd6!
- threat
- 1.Sd6?
- threat
- 2.Bf3#
- 2.Bc4#
- 1...Sb4
- 2.Qxe5#
- 1...Sa5
- 2.Bf3#
- 2.Qxe5#
- 1...d3
- 2.Bf3#
- 1...exd6!
- threat
- 1.Bf1?
- 1...d3
- 2.Sc3#
- 1...Bh5
- 2.Qd7#
- 1...Bg6
- 2.Qd7#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sb4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...e6
- 2.Sf6#
- 1...e2!
- 1...d3
- 1.Bd3?
- 1...Bh5
- 2.Qd7#
- 1...Bg6
- 2.Qd7#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sb4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...e6
- 2.Sf6#
- 1...e2!
- 1...Bh5
- 1.Bb4?
- 1...Sxb4
- 2.Qxe5#
- 1...d3
- 2.Sc3#
- 1...Bh5
- 2.Qd7#
- 1...Bg6
- 2.Qd7#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...e6
- 2.Sf6#
- 1...a3+!
- 1...Sxb4
- 1.Bxe7?
- threat
- 2.Sf6#
- 1...Sxe7
- 2.Qxe5#
- 1...a3+!
- threat
- 1.Rh5?
- 1...d3
- 2.Sc3#
- 1...Bg6
- 2.Qd7#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sb4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...e6
- 2.Sf6#
- 1...Bxh5!
- 1...d3
- 1.Qc8?
- 1...Bd7
- 2.Qxd7#
- 1...d3
- 2.Sc3#
- 1...Bh5
- 2.Qd7#
- 2.Qxc6#
- 1...Bg6
- 2.Qd7#
- 2.Qxc6#
- 1...Bf7
- 2.Qd7#
- 2.Qxc6#
- 1...Sb4
- 2.Bc4#
- 2.Qc4#
- 1...Sa7
- 2.Bc4#
- 2.Qc4#
- 1...Sb8
- 2.Bc4#
- 2.Qc4#
- 1...Sd8
- 2.Bc4#
- 2.Qc4#
- 1...e6
- 2.Sf6#
- 1...Sa5!
- 1...Bd7
- 1.Qf7+?
- 1...e6
- 2.Sf6#
- 1...Bxf7!
- 1...e6
- 1.Ka1?
- Keys
- 1.Sg3!
- 1...Sb4
- 2.Qxe5#
- 1...Bh5
- 2.Qd7#
- 1...Bg6
- 2.Qd7#
- 1...Bd7
- 2.Qxd7#
- 1...Bf7
- 2.Qd7#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...d3
- 2.Bf3#
- 1...e6
- 2.Qe4#
- 1...Sb4
- 1.Sg3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(i);N_GUARD::QAR2(H)
- B(i);N_GUARD::QAR2(H),XB(i)
- S(g);N_GUARD::QAR1(H),XS(f)
- P(d);N_GUARD::S(D)
- P(h);N_GUARD::S(D)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- P(d);N_GUARD::S(D)
- B(i);N_GUARD::QAR2(H)
- B(i);N_GUARD::QAR2(H),XB(i)
- S(g);N_GUARD::QAR1(H),XS(f)
- P(h);N_GUARD::S(D)
- Refutation
- P(a);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- P(d);N_GUARD::S(D)
- B(i);N_GUARD::QAR2(H)
- B(i);N_GUARD::QAR2(H),XB(i)
- S(g);N_GUARD::QAR1(H),XS(f)
- P(h);N_GUARD::S(D)
- Refutation
- P(a);
- Try
- K(A);S_FLIGHT
- Vars
- P(d);N_GUARD::S(D)
- B(i);N_GUARD::QAR2(H)
- B(i);N_GUARD::QAR2(H),XB(i)
- S(g);N_GUARD::QAR1(H),XS(f)
- P(h);N_GUARD::S(D)
- Refutation
- P(a);CHECK
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- S(g);N_GUARD::QAR1(H),XS(f)
- P(d);::B(B)
- Refutation
- P(b);XS(D)
- Try
- S(D);
- Vars
- S(g);N_GUARD::QAR1(H),XS(f)
- B(i);N_GUARD::QAR2(H)
- B(i);N_GUARD::QAR2(H),XB(i)
- P(d);::B(B)
- P(h);SBLOCK::QAB1(H)
- Refutation
- P(b);XS(D)
- Try
- S(D);
- Threat
- QAB1(H)
- Vars
- S(g);N_GUARD::QAR1(H),XS(f)
- B(i);N_GUARD::QAR2(H),XB(i)
- B(i);N_GUARD::QAR2(H)
- P(h);::QAB1(H),XP(h)
- Refutation
- K(e);N_SPINS(f),P-FLIGHT
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- S(g);N_GUARD::QAR1(H),XS(f)
- P(d);::B(B)
- Refutation
- P(h);XS(D)
- Try
- B(B);
- Vars
- P(d);N_GUARD::S(D)
- B(i);N_GUARD::QAR2(H)
- B(i);N_GUARD::QAR2(H),XB(i)
- S(g);N_GUARD::QAR1(H),XS(f)
- P(h);N_GUARD::S(D)
- Refutation
- P(b);
- Try
- B(B);
- Vars
- B(i);N_GUARD::QAR2(H)
- B(i);N_GUARD::QAR2(H),XB(i)
- S(g);N_GUARD::QAR1(H),XS(f)
- P(h);N_GUARD::S(D)
- Refutation
- P(b);
- Try
- B(C);
- Vars
- S(g);N_GUARD,XB(C)::QAR1(H),XS(f)
- P(d);N_GUARD::S(D)
- B(i);N_GUARD::QAR2(H)
- B(i);N_GUARD::QAR2(H),XB(i)
- S(g);N_GUARD::QAR1(H),XS(f)
- P(h);N_GUARD::S(D)
- Refutation
- P(c);CHECK
- Try
- B(C);XP(h)
- Threat
- S(D)
- Vars
- S(g);N_GUARD,XB(C)::QAR1(H),XS(f)
- Refutation
- P(c);CHECK
- Try
- R(I);
- Vars
- P(d);N_GUARD::S(D)
- B(i);N_GUARD::QAR2(H)
- B(i);N_GUARD::QAR2(H),XB(i)
- S(g);N_GUARD::QAR1(H),XS(f)
- P(h);N_GUARD::S(D)
- Refutation
- B(i);XR(I)
- Try
- Q(H);
- Vars
- B(i);N_GUARD::QAR2(H),XB(i)
- P(d);N_GUARD::S(D)
- P(h);N_GUARD::S(D)
- Refutation
- S(g);
- Try
- Q(H);CHECK
- Vars
- P(h);P_SPINP(h)::S(D)
- Refutation
- B(i);XQ(H)
- Try
- Actual
- S(D);
- Vars
- S(g);N_GUARD::QAR1(H),XS(f)
- B(i);N_GUARD::QAR2(H)
- B(i);N_GUARD::QAR2(H),XB(i)
- P(d);::B(B)
- P(h);SBLOCK::QAB1(H)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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