MESON Chess Problem Database
Problem Display
PID: 63409 (2R2N2/BQ6/p1PpP1Np/p2kP1pR/P2n4/1P3P2/1K2np2/5B2 w - - 0 1)
Kapralos, Demetrius N
2nd Prize, Breyer MT, 1973
#2
14 + 9
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Bc4#
- 1...Sg1
- 2.Bc4#
- 1...Sc3
- 2.Bc4#
- 1...Sg3
- 2.Bc4#
- 1...Sf4
- 2.Bc4#
- 1...Sc2
- 2.c7#
- 1...Sxb3
- 2.Qxb3#
- 1...Sxf3
- 2.c7#
- 1...Sb5
- 2.c7#
- 1...Sf5
- 2.c7#
- 1...Sxc6
- 2.Qxc6#
- 1...Sxe6
- 2.c7#
- 1...g4
- 2.Se7#
- 1...dxe5
- 2.Rd8#
- 2.Qd7#
- 1...Sc1
- Tries
- 1.Ka1?
- 1...Sxb3+
- 2.Qxb3#
- 1...Sxf3
- 2.c7#
- 1...Sxc6
- 2.Qxc6#
- 1...Sxe6
- 2.c7#
- 1...dxe5
- 2.Rd8#
- 2.Qd7#
- 1...Sc1
- 2.Bc4#
- 1...Sg1
- 2.Bc4#
- 1...Sc3
- 2.Bc4#
- 1...Sg3
- 2.Bc4#
- 1...Sf4
- 2.Bc4#
- 1...Sb5
- 2.c7#
- 1...Sf5
- 2.c7#
- 1...g4
- 2.Se7#
- 1...Sc2+!
- 1...Sxb3+
- 1.Kb1?
- 1...Sxb3
- 2.Qxb3#
- 1...Sxf3
- 2.c7#
- 1...Sxc6
- 2.Qxc6#
- 1...Sxe6
- 2.c7#
- 1...dxe5
- 2.Rd8#
- 2.Qd7#
- 1...Sc1
- 2.Bc4#
- 1...Sg1
- 2.Bc4#
- 1...Sg3
- 2.Bc4#
- 1...Sf4
- 2.Bc4#
- 1...Sc2
- 2.c7#
- 1...Sb5
- 2.c7#
- 1...Sf5
- 2.c7#
- 1...g4
- 2.Se7#
- 1...Sc3+!
- 1...Sxb3
- 1.Bb6?
- 1...Sxf3
- 2.c7#
- 1...Sxc6
- 2.Qxc6#
- 1...Sxe6
- 2.c7#
- 1...dxe5
- 2.Rd8#
- 2.Qd7#
- 1...Sc1
- 2.Bc4#
- 1...Sg1
- 2.Bc4#
- 1...Sc3
- 2.Bc4#
- 1...Sg3
- 2.Bc4#
- 1...Sf4
- 2.Bc4#
- 1...Sc2
- 2.c7#
- 1...Sb5
- 2.c7#
- 1...Sf5
- 2.c7#
- 1...g4
- 2.Se7#
- 1...Sxb3!
- 1...Sxf3
- 1.Rxg5?
- threat
- 2.Se7#
- 1...Sxb3
- 2.Qxb3#
- 1...Sxf3
- 2.c7#
- 1...dxe5
- 2.Rd8#
- 2.Qd7#
- 1...Sf5
- 2.c7#
- 1...hxg5!
- threat
- 1.Rxh6?
- 1...Sxb3
- 2.Qxb3#
- 1...Sxf3
- 2.c7#
- 1...Sxc6
- 2.Qxc6#
- 1...Sxe6
- 2.c7#
- 1...dxe5
- 2.Rd8#
- 2.Qd7#
- 1...Sc1
- 2.Bc4#
- 1...Sg1
- 2.Bc4#
- 1...Sc3
- 2.Bc4#
- 1...Sg3
- 2.Bc4#
- 1...Sf4
- 2.Bc4#
- 1...Sc2
- 2.c7#
- 1...Sb5
- 2.c7#
- 1...Sf5
- 2.c7#
- 1...g4!
- 1...Sxb3
- 1.Rd8?
- threat
- 2.Rxd6#
- 1...Sxf3
- 2.c7#
- 1...Sb5
- 2.c7#
- 1...Sf5
- 2.c7#
- 1...Sxb3!
- threat
- 1.Qxa6?
- threat
- 2.Qc4#
- 1...dxe5
- 2.Rd8#
- 1...Sb5
- 2.Qxb5#
- 1...Sxb3!
- threat
- 1.Qa8?
- 1...Sxf3
- 2.c7#
- 1...Sxc6
- 2.Qxc6#
- 1...Sxe6
- 2.c7#
- 1...dxe5
- 2.Rd8#
- 1...g4
- 2.Se7#
- 1...Sc1
- 2.Bc4#
- 1...Sg1
- 2.Bc4#
- 1...Sc3
- 2.Bc4#
- 1...Sg3
- 2.Bc4#
- 1...Sf4
- 2.Bc4#
- 1...Sc2
- 2.c7#
- 1...Sb5
- 2.c7#
- 1...Sf5
- 2.c7#
- 1...Sxb3!
- 1...Sxf3
- 1.Qb4?
- threat
- 2.Qxd6#
- 2.Qc4#
- 1...Sxb3
- 2.Qxb3#
- 2.Qe4#
- 1...Sxf3
- 2.Qc4#
- 1...dxe5
- 2.Se7#
- 2.Qc5#
- 1...Sb5
- 2.Qc4#
- 2.Qe4#
- 1...Sf5
- 2.Qxa5#
- 2.Qc4#
- 2.Qe4#
- 1...axb4!
- threat
- 1.e7?
- 1...Sxb3
- 2.Qxb3#
- 1...Sxf3
- 2.c7#
- 1...Sxc6
- 2.Qxc6#
- 1...dxe5
- 2.Rd8#
- 2.Qd7#
- 1...Sc1
- 2.Bc4#
- 1...Sg1
- 2.Bc4#
- 1...Sc3
- 2.Bc4#
- 1...Sg3
- 2.Bc4#
- 1...Sf4
- 2.Bc4#
- 1...Sc2
- 2.c7#
- 1...Sb5
- 2.c7#
- 1...Sf5
- 2.c7#
- 1...Se6
- 2.c7#
- 1...g4!
- 1...Sxb3
- 1.Ka1?
- Keys
- 1.Qf7!
- 1...Sxb3
- 2.e7#
- 1...Sxf3
- 2.Qxf3#
- 1...Sxc6
- 2.e7#
- 1...Sxe6
- 2.Qxe6#
- 1...dxe5
- 2.Qd7#
- 1...g4
- 2.Se7#
- 1...Sc1
- 2.Bc4#
- 1...Sg1
- 2.Bc4#
- 1...Sc3
- 2.Bc4#
- 1...Sg3
- 2.Bc4#
- 1...Sf4
- 2.Bc4#
- 1...Sc2
- 2.e7#
- 1...Sb5
- 2.e7#
- 1...Sf5
- 2.e7#
- 1...Sxb3
- 1.Qf7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(a);OGATE::B(A)
- S(c);N_GUARD::QAB(L)+P(H)
- S(c);OGATE,XP(C)::QAB(L),XS(c)
- S(c);N_GUARD,XP(D)::QAB(L)+P(H)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(L),XS(c)
- S(c);N_GUARD,XP(I)::QAB(L)+P(H)
- P(f);::S(J)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- S(c);CHECK,OGATE,XP(C)::QAB(L),XS(c)
- S(c);N_GUARD,XP(D)::QAB(L)+P(H)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(L),XS(c)
- S(c);N_GUARD,XP(I)::QAB(L)+P(H)
- S(a);OGATE::B(A)
- S(c);N_GUARD::QAB(L)+P(H)
- P(f);::S(J)
- Refutation
- S(c);CHECK
- Try
- K(B);P-FLIGHT
- Vars
- S(c);OGATE,XP(C)::QAB(L),XS(c)
- S(c);N_GUARD,XP(D)::QAB(L)+P(H)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(L),XS(c)
- S(c);N_GUARD,XP(I)::QAB(L)+P(H)
- S(a);OGATE::B(A)
- S(c);N_GUARD::QAB(L)+P(H)
- P(f);::S(J)
- Refutation
- S(a);CHECK
- Try
- B(K);
- Vars
- S(c);N_GUARD,XP(D)::QAB(L)+P(H)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(L),XS(c)
- S(c);N_GUARD,XP(I)::QAB(L)+P(H)
- S(a);OGATE::B(A)
- S(c);N_GUARD::QAB(L)+P(H)
- P(f);::S(J)
- Refutation
- S(c);XP(C)
- Try
- R(G);XP(f)
- Threat
- S(J)
- Vars
- S(c);OGATE,XP(C)::QAB(L),XS(c)
- S(c);N_GUARD,XP(D)::QAB(L)+P(H)
- S(c);N_GUARD::QAB(L)+P(H)
- Refutation
- P(i);XR(G)
- Try
- R(G);XP(i)
- Vars
- S(c);OGATE,XP(C)::QAB(L),XS(c)
- S(c);N_GUARD,XP(D)::QAB(L)+P(H)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(L),XS(c)
- S(c);N_GUARD,XP(I)::QAB(L)+P(H)
- S(a);OGATE::B(A)
- S(c);N_GUARD::QAB(L)+P(H)
- Refutation
- P(f);
- Try
- R(M);P_PINP(h)
- Threat
- R1(M),XP(h)
- Vars
- S(c);N_GUARD,XP(D)::QAB(L)+P(H)
- S(c);N_GUARD::QAB(L)+P(H)
- Refutation
- S(c);XP(C)
- Try
- Q(L);XP(g)
- Threat
- QAB1(L)
- Vars
- P(h);OGATEB,XP(F)::R(M)
- S(c);N_GUARD::QAR2(L),XS(c)
- Refutation
- S(c);XP(C)
- Try
- Q(L);
- Vars
- S(c);N_GUARD,XP(D)::QAB(L)+P(H)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(L),XS(c)
- S(c);N_GUARD,XP(I)::QAB(L)+P(H)
- P(h);OGATEB,XP(F)::R(M)
- P(f);::S(J)
- S(a);OGATE::B(A)
- S(c);N_GUARD::QAB(L)+P(H)
- Refutation
- S(c);XP(C)
- Try
- Q(L);
- Threat
- DUALS(2)
- Vars
- S(c);XP(D)::QAB1(L)
- Refutation
- P(d);XQ(L)
- Try
- P(I);
- Vars
- S(c);OGATE,XP(C)::QAB(L),XS(c)
- S(c);N_GUARD,XP(D)::QAB(L)+P(H)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(L),XS(c)
- S(a);OGATE::B(A)
- S(c);N_GUARD::QAB(L)+P(H)
- Refutation
- P(f);
- Try
- Actual
- Q(L);
- Vars
- S(c);N_GUARD,XP(C)::QAB(L)+P(I)
- S(c);OGATE,XP(D)::QAB(L),XS(c)
- S(c);N_GUARD,XP(H)::QAB(L)+P(I)
- S(c);OGATE,P_SPINS(c),XP(I)::QAB1(L),XS(c)
- P(h);OGATEB,XP(F)::QAR2(L)
- P(f);::S(J)
- S(a);OGATE::B(A)
- S(c);N_GUARD::QAB(L)+P(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).