MESON Chess Problem Database
Problem Display
PID: 72019 (1n6/p2Np1p1/4p1Q1/KB1kB1RP/4p3/3n4/2R5/8 w - - 0 1)
Morra, Juan Carlos
Schweizerische Schachzeitung, 1962
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sxe5
- 2.Rd2#
- 1...Sa6
- 2.Bc6#
- 1...Sc6+
- 2.Bxc6#
- 1...Sxd7
- 2.Bc6#
- 1...e3
- 2.Qxd3#
- 1...a6
- 2.Sb6#
- 1...Sc1
- Tries
- 1.Ka4?
- 1...Sc5+
- 2.Rxc5#
- 1...Sxe5
- 2.Rd2#
- 1...Sxd7
- 2.Bc6#
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sa6
- 2.Bc6#
- 1...Sc6
- 2.Bc4#
- 2.Bxc6#
- 1...e3
- 2.Qxd3#
- 1...a5
- 2.Sb6#
- 1...a6
- 2.Sb6#
- 1...Sb2+!
- 1...Sc5+
- 1.Bxd3?
- threat
- 2.Bxe4#
- 2.Rc5#
- 2.Qxe4#
- 1...Sxd7
- 2.Bxe4#
- 2.Qxe4#
- 1...exd3
- 2.Rc5#
- 2.Qxd3#
- 1...Sa6
- 2.Bxe4#
- 2.Qxe4#
- 1...e3
- 2.Be4#
- 2.Rc5#
- 2.Qe4#
- 1...Sc6+!
- threat
- 1.Ba4?
- threat
- 2.Bb3#
- 1...Sc6+
- 2.Bxc6#
- 1...Sc1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sxe5!
- threat
- 1.Ba1+?
- 1...Se5
- 2.Rd2#
- 1...e5
- 2.Bc4#
- 1...Kd6!
- 1...Se5
- 1.Bb2+?
- 1...Se5
- 2.Rd2#
- 1...e5
- 2.Bc4#
- 1...Kd6!
- 1...Se5
- 1.Bf4+?
- 1...Kd4
- 2.Rc4#
- 1...Se5
- 2.Rd2#
- 1...e5!
- 1...Kd4
- 1.Rc1?
- 1...Sc6+
- 2.Bxc6#
- 1...Sxe5
- 2.Rd1#
- 1...Sxd7
- 2.Bc6#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sa6
- 2.Bc6#
- 1...e3
- 2.Qxd3#
- 1...a6
- 2.Sb6#
- 1...Sxc1!
- 1...Sc6+
- 1.Rc3?
- 1...Sc6+
- 2.Bxc6#
- 1...Sxd7
- 2.Bc6#
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sa6
- 2.Bc6#
- 1...e3
- 2.Rxd3#
- 2.Qxd3#
- 1...a6
- 2.Sb6#
- 1...Sxe5!
- 1...Sc6+
- 1.Rg4?
- threat
- 2.Qxe4#
- 1...Sc6+
- 2.Bxc6#
- 1...Sf2
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...e3
- 2.Rd4#
- 2.Qxd3#
- 2.Qe4#
- 1...Sxe5!
- threat
- 1.Qf7?
- 1...Sc6+
- 2.Bxc6#
- 1...Sxe5
- 2.Rd2#
- 1...Sxd7
- 2.Bc6#
- 1...e3
- 2.Qf3#
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sa6
- 2.Bc6#
- 1...a6
- 2.Sb6#
- 1...g6!
- 1...Sc6+
- 1.Qh7?
- 1...Sc6+
- 2.Bxc6#
- 1...Sxe5
- 2.Rd2#
- 1...Sxd7
- 2.Bc6#
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sa6
- 2.Bc6#
- 1...e3
- 2.Qxd3#
- 1...a6
- 2.Sb6#
- 1...g6!
- 1...Sc6+
- 1.Qxg7?
- 1...Sc6+
- 2.Bxc6#
- 1...Sxe5
- 2.Rd2#
- 2.Qxe5#
- 1...Sxd7
- 2.Bc6#
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sa6
- 2.Bc6#
- 1...a6
- 2.Sb6#
- 1...e3!
- 1...Sc6+
- 1.h6?
- 1...Sc6+
- 2.Bxc6#
- 1...Sxe5
- 2.Rd2#
- 1...Sxd7
- 2.Bc6#
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sa6
- 2.Bc6#
- 1...e3
- 2.Qxd3#
- 1...a6
- 2.Sb6#
- 1...gxh6!
- 1...Sc6+
- 1.Ka4?
- Keys
- 1.Rf5!
- 1...Sc6+
- 2.Bxc6#
- 1...Sxe5
- 2.Rd2#
- 1...Sxd7
- 2.Bc6#
- 1...exf5
- 2.Bc4#
- 1...e3
- 2.Qg2#
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sa6
- 2.Bc6#
- 1...a6
- 2.Sb6#
- 1...Sc6+
- 1.Rf5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::R1(A)
- S(a);N_GUARD::R1(A),XS(a)
- S(a);OGATEB,P_SPINS(a),XB(D)::R(A)
- S(h);N_GUARD::B(C)
- S(h);CHECK,N_GUARD::B(C),XS(h)
- S(h);N_GUARD,XS(H)::B(C)
- P(b);OGATE::QAR2(G),XS(a)
- P(e);N_GUARD::S(H)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- S(a);CHECK,N_GUARD::R1(A),XS(a)
- S(a);OGATEB,P_SPINS(a),XB(D)::R(A)
- S(h);N_GUARD,XS(H)::B(C)
- S(a);N_GUARD::R1(A)
- S(h);N_GUARD::B(C)
- P(b);OGATE::QAR2(G),XS(a)
- P(e);N_GUARD::S(H)
- Refutation
- S(a);CHECK
- Try
- B(C);XS(a)
- Threat
- DUALS(3)
- Refutation
- S(h);CHECK
- Try
- B(C);
- Threat
- B(C)
- Vars
- S(h);CHECK,N_GUARD::B(C),XS(h)
- S(a);N_GUARD::R1(A)
- S(a);N_GUARD::R1(A),XS(a)
- Refutation
- S(a);P_SPINS(a),XB(D)
- Try
- B(D);CHECK
- Vars
- S(a);P_SPINS(a),S_CUTP(d)::R(A)
- P(d);P_SPINP(d)::B(C)
- Refutation
- K(c);P-FLIGHT,P_SPINP(d)
- Try
- B(D);CHECK
- Vars
- S(a);P_SPINS(a),S_CUTP(d)::R(A)
- P(d);P_SPINP(d)::B(C)
- Refutation
- K(c);P-FLIGHT,P_SPINP(d)
- Try
- B(D);CHECK
- Vars
- K(c);P-FLIGHT::R1(A)
- S(a);P_SPINS(a),S_CUTP(d)::R(A)
- Refutation
- P(d);P_SPINP(d)
- Try
- R(A);
- Vars
- S(h);CHECK,N_GUARD::B(C),XS(h)
- S(a);OGATEB,P_SPINS(a),XB(D)::R(A)
- S(h);N_GUARD,XS(H)::B(C)
- S(a);N_GUARD::R1(A)
- S(a);N_GUARD::R1(A),XS(a)
- S(h);N_GUARD::B(C)
- P(b);OGATE::QAR2(G),XS(a)
- P(e);N_GUARD::S(H)
- Refutation
- S(a);XR(A)
- Try
- R(A);
- Vars
- S(h);CHECK,N_GUARD::B(C),XS(h)
- S(h);N_GUARD,XS(H)::B(C)
- S(a);N_GUARD::R1(A)
- S(a);N_GUARD::R1(A),XS(a)
- S(h);N_GUARD::B(C)
- P(e);N_GUARD::S(H)
- Refutation
- S(a);P_SPINS(a),XB(D)
- Try
- R(E);
- Threat
- QAB1(G),XP(b)
- Vars
- S(h);CHECK,N_GUARD::B(C),XS(h)
- S(a);N_GUARD::R1(A)
- S(a);N_GUARD::R1(A),XS(a)
- Refutation
- S(a);XB(D)
- Try
- Q(G);P_PINP(d)
- Vars
- S(h);CHECK,N_GUARD::B(C),XS(h)
- S(a);OGATEB,P_SPINS(a),XB(D)::R(A)
- S(h);N_GUARD,XS(H)::B(C)
- P(b);OGATEB::QAB(G)
- S(a);N_GUARD::R1(A)
- S(a);N_GUARD::R1(A),XS(a)
- S(h);N_GUARD::B(C)
- P(e);N_GUARD::S(H)
- Refutation
- P(g);
- Try
- Q(G);
- Vars
- S(h);CHECK,N_GUARD::B(C),XS(h)
- S(a);OGATEB,P_SPINS(a),XB(D)::R(A)
- S(h);N_GUARD,XS(H)::B(C)
- S(a);N_GUARD::R1(A)
- S(a);N_GUARD::R1(A),XS(a)
- S(h);N_GUARD::B(C)
- P(b);OGATE::QAR2(G),XS(a)
- P(e);N_GUARD::S(H)
- Refutation
- P(g);
- Try
- Q(G);XP(g)
- Vars
- S(h);CHECK,N_GUARD::B(C),XS(h)
- S(h);N_GUARD,XS(H)::B(C)
- S(a);N_GUARD::R1(A)
- S(a);N_GUARD::R1(A),XS(a)
- S(h);N_GUARD::B(C)
- P(e);N_GUARD::S(H)
- Refutation
- P(b);
- Try
- P(F);
- Vars
- S(h);CHECK,N_GUARD::B(C),XS(h)
- S(a);OGATEB,P_SPINS(a),XB(D)::R(A)
- S(h);N_GUARD,XS(H)::B(C)
- S(a);N_GUARD::R1(A)
- S(a);N_GUARD::R1(A),XS(a)
- S(h);N_GUARD::B(C)
- P(b);OGATE::QAR2(G),XS(a)
- P(e);N_GUARD::S(H)
- Refutation
- P(g);XP(F)
- Try
- Actual
- R(E);
- Vars
- S(h);CHECK,N_GUARD::B(C),XS(h)
- S(a);OGATEB,P_SPINS(a),XB(D)::R(A)
- S(h);N_GUARD,XS(H)::B(C)
- P(d);XR(E)::B(C)
- P(b);OGATEB::QAB(G)
- S(a);N_GUARD::R1(A)
- S(a);N_GUARD::R1(A),XS(a)
- S(h);N_GUARD::B(C)
- P(e);N_GUARD::S(H)
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).