MESON Chess Problem Database
Problem Display
PID: 149523 (1KR5/3BBP2/R2NN3/1n1P4/1k3bQ1/8/1PP5/5q1r w - - 0 1)
Forster, Klaus
Troll, 2012
#2
12 + 5
SOLUTION
- SOUND
- Sets
- 1...Qg2
- 2.Rc4#
- 1...Qh3
- 2.Rc4#
- 1...Qc4
- 2.Rxc4#
- 1...Qa1
- 2.Rc4#
- 1...Qb1
- 2.Rc4#
- 1...Qc1
- 2.Rc4#
- 1...Qd1
- 2.Rc4#
- 1...Qe1
- 2.Rc4#
- 1...Qg1
- 2.Rc4#
- 1...Qf2
- 2.Rc4#
- 1...Qf3
- 2.Rc4#
- 1...Sa3
- 2.Ra4#
- 2.bxa3#
- 1...Sc3
- 2.bxc3#
- 1...Sd4
- 2.Ra4#
- 1...Sxd6
- 2.Bxd6#
- 2.Ra4#
- 1...Sa7
- 2.Ra4#
- 1...Sc7
- 2.Ra4#
- 1...Qg2
- Tries
- 1.Ka8?
- threat
- 2.Sxb5#
- 1...Sxd6
- 2.Bxd6#
- 2.Ra4#
- 1...Qc4
- 2.Rxc4#
- 1...Qg1
- 2.Rc4#
- 1...Qf2
- 2.Rc4#
- 1...Sa3
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Se8#
- 2.Ra4#
- 2.bxa3#
- 1...Sc3
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Se8#
- 2.bxc3#
- 1...Sd4
- 2.Ra4#
- 1...Sa7
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Se8#
- 2.Ra4#
- 1...Sc7+!
- threat
- 1.Sxf4?
- threat
- 2.Sd3#
- 2.Sxb5#
- 1...Sxd6
- 2.Sd3#
- 2.Bxd6#
- 2.Ra4#
- 1...Sc7
- 2.Sd3#
- 1...Qe2
- 2.Sd3#
- 1...Qd3
- 2.Sxd3#
- 2.Sxb5#
- 1...Qc4
- 2.Sd3#
- 2.Rxc4#
- 1...Qe1
- 2.Sd3#
- 2.Rc4#
- 1...Qg1
- 2.Sd3#
- 2.Rc4#
- 1...Qf2
- 2.Sd3#
- 2.Rc4#
- 1...Rh6
- 2.Sd3#
- 1...Sa3
- 2.Sd3#
- 2.Sc4#
- 2.Se4#
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Se8#
- 2.Ra4#
- 2.bxa3#
- 1...Sc3
- 2.Sd3#
- 2.Sc4#
- 2.Se4#
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Se8#
- 2.bxc3#
- 1...Sd4
- 2.Sc4#
- 2.Se4#
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Se8#
- 2.Ra4#
- 1...Sa7
- 2.Sd3#
- 2.Sc4#
- 2.Se4#
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Se8#
- 2.Ra4#
- 1...Qxf4!
- threat
- 1.Bxb5?
- threat
- 2.Ra4#
- 1...Qa1
- 2.Rc4#
- 2.Qxf4#
- 1...Qxb5+!
- threat
- 1.Rc7?
- threat
- 2.Sxb5#
- 1...Sxd6
- 2.Bxd6#
- 2.Ra4#
- 1...Sxc7
- 2.Ra4#
- 1...Qc4
- 2.Rxc4#
- 1...Qg1
- 2.Rc4#
- 1...Qf2
- 2.Rc4#
- 1...Sa3
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 2.Ra4#
- 2.bxa3#
- 1...Sc3
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 2.bxc3#
- 1...Sd4
- 2.Ra4#
- 1...Sa7
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 2.Ra4#
- 1...Rh8+!
- threat
- 1.Qxf4+?
- 1...Qc4
- 2.Sxb5#
- 2.Rxc4#
- 2.Qxc4#
- 1...Sd4
- 2.Sc4#
- 2.Se4#
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Se8#
- 2.Ra4#
- 2.Qd2#
- 1...Qxf4!
- 1...Qc4
- 1.b3?
- threat
- 2.Ra4#
- 1...Qc4
- 2.Rxc4#
- 1...Sc7
- 2.Sb5#
- 1...Qa1
- 2.Rc4#
- 1...Sc3!
- threat
- 1.Ka8?
- Keys
- 1.Kb7!
- threat
- 2.Sxb5#
- 1...Sxd6+
- 2.Bxd6#
- 1...Qc4
- 2.Rxc4#
- 1...Qg1
- 2.Rc4#
- 1...Qf2
- 2.Rc4#
- 1...Sa3
- 2.Sb5#
- 2.Sf5#
- 2.Se8#
- 2.Ra4#
- 2.bxa3#
- 1...Sc3
- 2.Sb5#
- 2.Sf5#
- 2.Se8#
- 2.bxc3#
- 1...Sd4
- 2.Ra4#
- 1...Sa7
- 2.Sb5#
- 2.Sf5#
- 2.Se8#
- 2.Ra4#
- 1...Sc7
- 2.Ra4#
- threat
- 1.Kb7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 10
- Sets
- Q(a);N_GUARD::R1(L)
- Q(a);N_GUARD,N_SPINB(d)::R1(L),XQ(a)
- S(e);OGATE::P(A),XS(e)
- S(e);N_SPINB(d)::R1(E)
- S(e);::R1(E)
- S(e);N_PINS(F)::R1(E)
- Tries
- Try
- K(K);N_SPINS(F),P-FLIGHT
- Threat
- B(I)+S(F),XS(e)
- Vars
- Q(a);N_GUARD,N_SPINB(d)::R1(L),XQ(a)
- Q(a);N_GUARD::R1(L)
- S(e);N_SPINB(d)::R1(E)
- Refutation
- S(e);CHECK
- Try
- S(G);N_SPINS(F),XB(d)
- Threat
- DUALS(2)
- Vars
- S(e);::QAR(C)+S(G),DCHECK
- Q(a);::QAR(C)+S(G),DCHECK
- R(b);::QAR(C)+S(G),DCHECK
- Refutation
- Q(a);P_PINS(F),P_SPINQ(a),XS(G)
- Try
- B(H);XS(e)
- Threat
- R1(E)
- Refutation
- Q(a);CHECK,XB(H)
- Try
- R(L);N_SPINS(F)
- Threat
- B(I)+S(F),XS(e)
- Vars
- S(e);XR(L)::R1(E)
- Q(a);N_GUARD,N_SPINB(d)::R1(L),XQ(a)
- Q(a);N_GUARD::R1(L)
- S(e);N_SPINB(d)::R1(E)
- Refutation
- R(b);CHECK
- Try
- Q(C);CHECK,N_SPINS(F),XB(d)
- Refutation
- Q(a);P_PINS(F),XQ(C)
- Try
- P(A);
- Threat
- R1(E)
- Vars
- Q(a);N_GUARD,N_SPINB(d)::R1(L),XQ(a)
- S(e);N_PINS(F)::B(I)+S(F)
- Q(a);N_GUARD::R1(L)
- Refutation
- S(e);
- Try
- Actual
- K(K);N_SPINS(F),P-FLIGHT
- Threat
- B(I)+S(F),XS(e)
- Vars
- S(e);CHECK,OGATE,P_SPINS(e),XS(F)::B(I),XS(e)
- Q(a);N_GUARD,N_SPINB(d)::R1(L),XQ(a)
- Q(a);N_GUARD::R1(L)
- S(e);N_SPINB(d)::R1(E)
- S(e);::R1(E)
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).