MESON Chess Problem Database
Problem Display
PID: 147033 (3k4/p2P3n/1rPKPr2/N5N1/8/6Q1/8/8 w - - 0 1)
Sag, Andy
Australian Chess Problem Magazine, 1995
#2
7 + 5
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.c7#
- 1...Rb2
- 2.c7#
- 1...Rb3
- 2.c7#
- 1...Rb4
- 2.c7#
- 1...Rb5
- 2.c7#
- 1...Ra6
- 2.Sb7#
- 1...Rxc6+
- 2.Sxc6#
- 1...Rb7
- 2.Sxb7#
- 1...Rb8
- 2.c7#
- 1...Rf1
- 2.e7#
- 1...Rf2
- 2.e7#
- 1...Rf3
- 2.e7#
- 1...Rf4
- 2.e7#
- 1...Rf5
- 2.e7#
- 1...Rxe6+
- 2.Sxe6#
- 1...Rg6
- 2.Sf7#
- 1...Rh6
- 2.Sf7#
- 1...Rf7
- 2.Sxf7#
- 1...Rf8
- 2.e7#
- 1...Rb1
- Tries
- 1.Qf4?
- 1...Rxc6+
- 2.Sxc6#
- 1...Rxe6+
- 2.Sxe6#
- 1...Rxf4
- 2.e7#
- 1...Sxg5
- 2.Qxf6#
- 1...Rg6
- 2.Sf7#
- 1...Rb1
- 2.c7#
- 1...Rb2
- 2.c7#
- 1...Rb3
- 2.c7#
- 1...Rb4
- 2.c7#
- 1...Rb5
- 2.c7#
- 1...Ra6
- 2.Sb7#
- 1...Rb7
- 2.Sxb7#
- 1...Rb8
- 2.c7#
- 1...Rf5
- 2.e7#
- 1...Rh6
- 2.Sf7#
- 1...Rf7
- 2.Sxf7#
- 1...Rf8
- 2.e7#
- 1...Sf8
- 2.Qxf6#
- 1...a6!
- 1...Rxc6+
- 1.Qh4?
- threat
- 2.Sf7#
- 1...Rxc6+
- 2.Sxc6#
- 1...Rxe6+
- 2.Sxe6#
- 1...Rf7
- 2.Sxf7#
- 1...Sxg5!
- threat
- 1.Qe5?
- 1...Rxc6+
- 2.Sxc6#
- 1...Rxe6+
- 2.Sxe6#
- 1...Sxg5
- 2.Qxf6#
- 1...Rg6
- 2.Sf7#
- 1...Rb1
- 2.c7#
- 1...Rb2
- 2.c7#
- 1...Rb3
- 2.c7#
- 1...Rb4
- 2.c7#
- 1...Rb5
- 2.c7#
- 1...Ra6
- 2.Sb7#
- 1...Rb7
- 2.Sxb7#
- 1...Rb8
- 2.c7#
- 1...Rf1
- 2.e7#
- 1...Rf2
- 2.e7#
- 1...Rf3
- 2.e7#
- 1...Rf4
- 2.e7#
- 1...Rf5
- 2.e7#
- 1...Rh6
- 2.Sf7#
- 1...Rf7
- 2.Sxf7#
- 1...Rf8
- 2.e7#
- 1...Sf8
- 2.Qxf6#
- 1...a6!
- 1...Rxc6+
- 1.Qc3?
- 1...Rxc6+
- 2.Sxc6#
- 1...Rxe6+
- 2.Sxe6#
- 1...Sxg5
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Rb1
- 2.c7#
- 1...Rb2
- 2.c7#
- 1...Rb3
- 2.c7#
- 1...Rb4
- 2.c7#
- 1...Rb5
- 2.c7#
- 1...Ra6
- 2.Sb7#
- 1...Rb7
- 2.Sxb7#
- 1...Rb8
- 2.c7#
- 1...Rf1
- 2.e7#
- 1...Rf2
- 2.e7#
- 1...Rf3
- 2.e7#
- 1...Rf4
- 2.e7#
- 1...Rf5
- 2.e7#
- 1...Rg6
- 2.Sf7#
- 1...Rh6
- 2.Sf7#
- 1...Rf7
- 2.Sxf7#
- 1...Rf8
- 2.e7#
- 1...a6!
- 1...Rxc6+
- 1.Qf3?
- 1...Rxc6+
- 2.Sxc6#
- 1...Rxe6+
- 2.Sxe6#
- 1...Rxf3
- 2.e7#
- 1...Sxg5
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Rb1
- 2.c7#
- 1...Rb2
- 2.c7#
- 1...Rb3
- 2.c7#
- 1...Rb4
- 2.c7#
- 1...Rb5
- 2.c7#
- 1...Ra6
- 2.Sb7#
- 1...Rb7
- 2.Sxb7#
- 1...Rb8
- 2.c7#
- 1...Rf4
- 2.e7#
- 1...Rf5
- 2.e7#
- 1...Rg6
- 2.Sf7#
- 1...Rh6
- 2.Sf7#
- 1...Rf7
- 2.Sxf7#
- 1...Rf8
- 2.e7#
- 1...a6!
- 1...Rxc6+
- 1.Qf4?
- Keys
- 1.Qf2!
- 1...Rxc6+
- 2.Sxc6#
- 1...Rxe6+
- 2.Sxe6#
- 1...Rxf2
- 2.e7#
- 1...Sxg5
- 2.Qxf6#
- 1...Rg6
- 2.Sf7#
- 1...Rb1
- 2.c7#
- 1...Rb2
- 2.c7#
- 1...Rb3
- 2.c7#
- 1...Rb4
- 2.c7#
- 1...Rb5
- 2.c7#
- 1...Ra6
- 2.Sb7#
- 1...Rb7
- 2.Sxb7#
- 1...Rb8
- 2.c7#
- 1...Rf3
- 2.e7#
- 1...Rf4
- 2.e7#
- 1...Rf5
- 2.e7#
- 1...Rh6
- 2.Sf7#
- 1...Rf7
- 2.Sxf7#
- 1...Rf8
- 2.e7#
- 1...Sf8
- 2.Qxf6#
- 1...a6
- 2.Qxb6#
- 1...Rxc6+
- 1.Qf2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- R(a);N_PINP(D),P_PINP(F)::P(D)
- R(a);N_GUARD::S(B)
- R(a);CHECK,P_PINP(F),XP(D)::S(B),XR(a)
- R(a);N_GUARD,N_PINP(D),P_PINP(F)::S(B),XR(a)
- R(b);OGATE::P(F)
- R(b);CHECK,XP(F)::S(C),XR(b)
- R(b);N_GUARD::S(C)
- R(b);N_GUARD::S(C),XR(b)
- Tries
- Try
- Q(A);
- Vars
- R(a);CHECK,P_PINP(F),XP(D)::S(B),XR(a)
- R(b);CHECK,XP(F)::S(C),XR(b)
- R(b);OGATE,XQ(A)::P(F)
- S(d);N_GUARD,XS(C)::QAB(A),XR(b)
- R(b);N_GUARD::S(C)
- R(a);N_PINP(D),P_PINP(F)::P(D)
- R(a);N_GUARD::S(B)
- R(a);N_GUARD,N_PINP(D),P_PINP(F)::S(B),XR(a)
- R(b);OGATE::P(F)
- R(b);N_GUARD::S(C),XR(b)
- S(d);N_GUARD::QAB(A),XR(b)
- Refutation
- P(c);
- Try
- Q(A);
- Threat
- S(C)
- Vars
- R(a);CHECK,P_PINP(F),XP(D)::S(B),XR(a)
- R(b);CHECK,XP(F)::QAB(A)+S(C),DCHECK,XR(b)
- R(b);::QAB(A)+S(C),DCHECK,XR(b)
- Refutation
- S(d);XS(C)
- Try
- Q(A);
- Vars
- R(a);CHECK,P_PINP(F),XP(D)::S(B),XR(a)
- R(b);CHECK,XP(F)::S(C),XR(b)
- S(d);N_GUARD,XS(C)::QAB(A),XR(b)
- R(b);N_GUARD::S(C)
- R(a);N_PINP(D),P_PINP(F)::P(D)
- R(a);N_GUARD::S(B)
- R(a);N_GUARD,N_PINP(D),P_PINP(F)::S(B),XR(a)
- R(b);OGATE::P(F)
- R(b);N_GUARD::S(C),XR(b)
- S(d);N_GUARD::QAB(A),XR(b)
- Refutation
- P(c);
- Try
- Q(A);
- Vars
- R(a);CHECK,P_PINP(F),XP(D)::S(B),XR(a)
- R(b);CHECK,XP(F)::S(C),XR(b)
- S(d);N_GUARD,XS(C)::QAB(A),XR(b)
- S(d);N_GUARD::QAB(A),XR(b)
- R(a);N_PINP(D),P_PINP(F)::P(D)
- R(a);N_GUARD::S(B)
- R(a);N_GUARD,N_PINP(D),P_PINP(F)::S(B),XR(a)
- R(b);OGATE::P(F)
- R(b);N_GUARD::S(C)
- R(b);N_GUARD::S(C),XR(b)
- Refutation
- P(c);
- Try
- Q(A);
- Vars
- R(a);CHECK,P_PINP(F),XP(D)::S(B),XR(a)
- R(b);CHECK,XP(F)::S(C),XR(b)
- R(b);OGATE,XQ(A)::P(F)
- S(d);N_GUARD,XS(C)::QAB(A),XR(b)
- S(d);N_GUARD::QAB(A),XR(b)
- R(a);N_PINP(D),P_PINP(F)::P(D)
- R(a);N_GUARD::S(B)
- R(a);N_GUARD,N_PINP(D),P_PINP(F)::S(B),XR(a)
- R(b);OGATE::P(F)
- R(b);N_GUARD::S(C)
- R(b);N_GUARD::S(C),XR(b)
- Refutation
- P(c);
- Try
- Actual
- Q(A);
- Vars
- R(a);CHECK,P_PINP(F),XP(D)::S(B),XR(a)
- R(b);CHECK,XP(F)::S(C),XR(b)
- R(b);OGATE,XQ(A)::P(F)
- S(d);N_GUARD,XS(C)::QAB(A),XR(b)
- R(b);N_GUARD::S(C)
- R(a);N_PINP(D),P_PINP(F)::P(D)
- R(a);N_GUARD::S(B)
- R(a);N_GUARD,N_PINP(D),P_PINP(F)::S(B),XR(a)
- R(b);OGATE::P(F)
- R(b);N_GUARD::S(C),XR(b)
- S(d);N_GUARD::QAB(A),XR(b)
- P(c);N_GUARD::QAB(A),XR(a)
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).