MESON Chess Problem Database
Problem Display
PID: 143440 (8/5ppN/1pp1p2q/1P6/3pk1Bp/3NP2P/Q1P3K1/5RB1 w - - 0 1)
Anonymous
Hackney Mercury, 1894
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qf4
- 2.Rxf4#
- 1...Qg5
- 2.Sxg5#
- 1...Qh5
- 2.Rf4#
- 1...Qg6
- 2.Rf4#
- 1...Qxh7
- 2.Rf4#
- 1...dxe3
- 2.Qc4#
- 1...cxb5
- 2.Qa8#
- 1...c5
- 2.Qa8#
- 1...e5
- 2.Bf5#
- 1...f5
- 2.Bf3#
- 1...f6
- 2.Qxe6#
- 1...g6
- 2.Sf6#
- 1...Qf4
- Tries
- 1.Rf5?
- threat
- 2.Re5#
- 1...dxe3
- 2.Qc4#
- 2.Qa4#
- 1...exf5
- 2.Bf3#
- 1...Qf4
- 2.Rxf4#
- 1...Qg5
- 2.Sxg5#
- 1...Qh5
- 2.Rf4#
- 1...e5
- 2.Rxe5#
- 1...f6
- 2.Qxe6#
- 1...Qf6!
- threat
- 1.Rxf7?
- threat
- 2.Bf3#
- 1...Qxe3
- 2.Qxe6#
- 1...dxe3
- 2.Qc4#
- 1...Qf4
- 2.Rxf4#
- 1...Qg5
- 2.Sxg5#
- 1...Qh5
- 2.Rf4#
- 1...Qg6
- 2.Rf4#
- 1...Qf6!
- threat
- 1.Qc4?
- threat
- 2.Qxd4#
- 2.Qxc6#
- 1...Qxe3
- 2.Qxc6#
- 1...cxb5
- 2.Qxd4#
- 2.Qc6#
- 1...Qf6
- 2.Qxc6#
- 1...Qg5
- 2.Sxg5#
- 2.Qxd4#
- 1...Qh5
- 2.Rf4#
- 2.Qxd4#
- 1...e5
- 2.Bf5#
- 1...c5!
- threat
- 1.Rf5?
- Keys
- 1.Re1!
- 1...Qxe3
- 2.Sg5#
- 1...Qxh7
- 2.exd4#
- 1...dxe3
- 2.Qc4#
- 1...cxb5
- 2.Qa8#
- 1...Qf6
- 2.exd4#
- 1...Qf4
- 2.exf4#
- 1...Qg5
- 2.Sxg5#
- 1...Qh5
- 2.exd4#
- 1...Qg6
- 2.exd4#
- 1...c5
- 2.Qa8#
- 1...e5
- 2.Sf2#
- 1...f5
- 2.Bf3#
- 1...f6
- 2.Qxe6#
- 1...g5
- 2.exd4#
- 1...g6
- 2.Sf6#
- 1...Qxe3
- 1.Re1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 5
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(g);N_GUARD::R1(A),XQ(g)
- Q(g);N_GUARD,P_PINB(I)::S(K),XQ(g)
- Q(g);N_GUARD::R1(A)
- Q(g);N_GUARD,P_PINB(I)::R1(A)
- Q(g);N_GUARD,XS(K)::R1(A)
- P(a);OGATEB,XP(G)::QAR2(C)
- P(e);OGATEB,XP(J)::QAB(C)
- P(e);OGATEB::QAB(C)
- P(f);N_GUARD::B(I)
- P(h);SBLOCK::B(I)
- P(h);N_GUARD,S_CUTQ(g)::QAR2(C),XP(f)
- P(i);N_GUARD,S_CUTQ(g)::S(K)
- Tries
- Try
- R(A);
- Threat
- R1(A)
- Vars
- P(f);SBLOCK,XR(A)::B(I)
- Q(g);N_GUARD::R1(A),XQ(g)
- Q(g);N_GUARD,P_PINB(I)::S(K),XQ(g)
- Q(g);N_GUARD::R1(A)
- P(f);::R1(A),XP(f)
- P(h);N_GUARD,S_CUTQ(g)::QAR2(C),XP(f)
- Refutation
- Q(g);
- Try
- R(A);XP(h)
- Threat
- B(I)
- Vars
- Q(g);N_GUARD,XP(G)::QAR2(C),XP(f)
- P(a);OGATEB,XP(G)::QAR2(C)
- Q(g);N_GUARD::R1(A),XQ(g)
- Q(g);N_GUARD,P_PINB(I)::S(K),XQ(g)
- Q(g);N_GUARD::R1(A)
- Q(g);N_GUARD,P_PINB(I)::R1(A)
- Refutation
- Q(g);
- Try
- Q(C);P_PINP(a)
- Threat
- DUALS(2)
- Vars
- Q(g);XP(G)::QAB(C),XP(e)
- Q(g);::QAB(C),XP(e)
- P(f);N_GUARD::B(I)
- Refutation
- P(e);
- Try
- Actual
- R(A);
- Vars
- Q(g);N_GUARD,P_SPINQ(g),XP(G)::S(K)
- Q(g);N_GUARD,XS(K)::R(A)+P(G),XP(a)
- P(a);OGATEB,P_SPINP(a),XP(G)::QAR2(C)
- P(e);OGATEB,XP(J)::QAB(C)
- Q(g);N_GUARD::R(A)+P(G),XP(a)
- Q(g);OGATE::R(A)+P(G),XQ(g)
- Q(g);N_GUARD,P_PINB(I)::S(K),XQ(g)
- Q(g);N_GUARD,P_PINB(I)::R(A)+P(G),XP(a)
- P(e);OGATEB::QAB(C)
- P(f);SBLOCK::S(F)
- P(h);SBLOCK::B(I)
- P(h);N_GUARD,S_CUTQ(g)::QAR2(C),XP(f)
- P(i);S_CUTQ(g)::R(A)+P(G),XP(a)
- P(i);N_GUARD,S_CUTQ(g)::S(K)
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).