MESON Chess Problem Database
Problem Display
PID: 145287 (3q4/2RP2PK/r4k1N/6Np/8/B3Q3/3R4/b4r2 w - - 0 1)
Morse, Christopher Jeremy
Problem Observer, 1989
#2
9 + 6
SOLUTION
- SOUND
- Sets
- 1...Qxc7
- 2.Be7#
- 2.Qe7#
- 2.g8S#
- 1...Qe7
- 2.Bxe7#
- 2.Qxe7#
- 1...Qa8
- 2.Be7#
- 2.Qe7#
- 1...Qb8
- 2.Be7#
- 2.Qe7#
- 1...Qc8
- 2.Be7#
- 2.Qe7#
- 1...Qe8
- 2.dxe8S#
- 1...Qf8
- 2.gxf8Q#
- 2.gxf8R#
- 1...Qh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rb1
- 2.Rf2#
- 2.Qf4#
- 1...Rc1
- 2.Rf2#
- 2.Qf4#
- 1...Rd1
- 2.Rf2#
- 2.Qf4#
- 1...Re1
- 2.Rf2#
- 2.Qf4#
- 1...Rg1
- 2.Rf2#
- 2.Qf4#
- 1...Rh1
- 2.Rf2#
- 2.Qf4#
- 1...Rf2
- 2.Rxf2#
- 1...Rf4
- 2.Qxf4#
- 1...Rxa3
- 2.Rd6#
- 2.Rc6#
- 1...Ra4
- 2.Rd6#
- 2.Rc6#
- 1...Ra5
- 2.Rd6#
- 2.Rc6#
- 1...Rc6
- 2.Rxc6#
- 1...Rd6
- 2.Rxd6#
- 1...Ra7
- 2.Rd6#
- 2.Rc6#
- 1...Ra8
- 2.Rd6#
- 2.Rc6#
- 1...Bb2
- 2.Bxb2#
- 1...Qxc7
- Tries
- 1.Bf8?
- threat
- 2.g8S#
- 1...Qxf8
- 2.gxf8Q#
- 2.gxf8R#
- 1...Rf4
- 2.Qxf4#
- 1...Qe7
- 2.Bxe7#
- 2.Qxe7#
- 1...Qxd7!
- threat
- 1.Qd4+?
- 1...Kxg5
- 2.Rg2#
- 1...Bxd4!
- 1...Kxg5
- 1.Bf8?
- Keys
- 1.Rd5!
- 1...Qg8+
- 2.Sxg8#
- 1...Qh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Qxc7
- 2.Sg8#
- 2.Be7#
- 2.Qe7#
- 2.g8S#
- 1...Qxd7
- 2.Sg8#
- 1...Rxa3
- 2.Rd6#
- 2.Rc6#
- 2.Qe6#
- 1...Qe7
- 2.Sg8#
- 2.Bxe7#
- 2.Qxe7#
- 1...Qa8
- 2.Be7#
- 2.Qe7#
- 1...Qb8
- 2.Be7#
- 2.Qe7#
- 1...Qc8
- 2.Be7#
- 2.Qe7#
- 1...Qe8
- 2.dxe8S#
- 1...Qf8
- 2.gxf8Q#
- 2.gxf8R#
- 1...Rb1
- 2.Rf5#
- 2.Qf2#
- 2.Qf4#
- 2.Qf3#
- 1...Rc1
- 2.Rf5#
- 2.Qf2#
- 2.Qf4#
- 2.Qf3#
- 1...Rd1
- 2.Rf5#
- 2.Qf2#
- 2.Qf4#
- 2.Qf3#
- 1...Re1
- 2.Rf5#
- 2.Qf2#
- 2.Qf4#
- 2.Qf3#
- 1...Rg1
- 2.Rf5#
- 2.Qf2#
- 2.Qf4#
- 2.Qf3#
- 1...Rh1
- 2.Rf5#
- 2.Qf2#
- 2.Qf4#
- 2.Qf3#
- 1...Rf2
- 2.Qxf2#
- 1...Rf3
- 2.Qxf3#
- 1...Rf4
- 2.Qxf4#
- 1...Rf5
- 2.Rxf5#
- 1...Ra4
- 2.Rd6#
- 2.Rc6#
- 2.Qb6#
- 2.Qe6#
- 1...Ra5
- 2.Rd6#
- 2.Rc6#
- 2.Qb6#
- 2.Qe6#
- 1...Rb6
- 2.Qxb6#
- 1...Rc6
- 2.Rxc6#
- 1...Rd6
- 2.Rxd6#
- 1...Re6
- 2.Qxe6#
- 1...Ra7
- 2.Rd6#
- 2.Rc6#
- 2.Qb6#
- 2.Qe6#
- 1...Ra8
- 2.Rd6#
- 2.Rc6#
- 2.Qb6#
- 2.Qe6#
- 1...Bb2
- 2.Bxb2#
- 1...Bc3
- 2.Qxc3#
- 1...Bd4
- 2.Qxd4#
- 1...Be5
- 2.Qxe5#
- 1...h4
- 2.Sg4#
- 1...Qg8+
- 1.Rd5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 10
- REMOVED MATES = 0
- Sets
- Q(f);OGATE::PXQ(f)=S
- Q(f);OGATE::PXQ(f)=Q
- Q(f);CHECK,OGATE::PXQ(f)=Q
- R(b);N_GUARD::R(A),XR(b)
- R(b);N_GUARD::QAR2(C),XR(b)
- R(d);N_GUARD::R(F),XR(d)
- R(d);N_GUARD::R(A),XR(d)
- B(a);N_GUARD::B(B),XB(a)
- Tries
- Try
- B(B);
- Threat
- P=S
- Vars
- Q(f);OGATE,XB(B)::PXQ(f)=Q
- R(b);N_GUARD::QAR2(C),XR(b)
- Refutation
- Q(f);P_PINP(H),XP(G)
- Try
- Q(C);CHECK
- Vars
- K(e);S_FLIGHT,XS(D)::R(A)
- Refutation
- B(a);XQ(C)
- Try
- Actual
- R(A);
- Vars
- Q(f);CHECK,N_GUARD::S(E),XQ(f)
- Q(f);CHECK,OGATE::PXQ(f)=Q
- Q(f);N_GUARD,P_PINP(H),XP(G)::S(E)
- Q(f);OGATE::PXQ(f)=S
- Q(f);OGATE::PXQ(f)=Q
- R(b);N_GUARD::QAR(C),XR(b)
- R(b);N_GUARD::QAR2(C),XR(b)
- R(b);N_GUARD::R1(A),XR(b)
- R(d);N_GUARD::QAR(C),XR(d)
- R(d);N_GUARD::R(F),XR(d)
- R(d);N_GUARD::R(A),XR(d)
- R(d);N_GUARD::QAR1(C),XR(d)
- B(a);N_GUARD::B(B),XB(a)
- B(a);N_GUARD::QAB(C),XB(a)
- B(a);N_GUARD::QAB1(C),XB(a)
- P(c);N_GUARD::S(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).