MESON Chess Problem Database
Problem Display
PID: 266959 (Qb2k1N1/1pPp4/n1r3P1/8/BRp5/B7/7K/5R2 w - - 0 1)
Coombes, TA
The Problemist, 1955
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Rd6
- 2.c8Q#
- 2.c8R#
- 1...Sxb4
- 2.Qxb8#
- 1...Sc5
- 2.Qxb8#
- 1...Sxc7
- 2.Qxb8#
- 1...d6
- 2.c8Q#
- 1...Rd6
- Tries
- 1.Rbb1?
- threat
- 2.Rf8#
- 1...d5
- 2.Sf6#
- 1...d6
- 2.c8Q#
- 1...Rd6
- 2.c8Q#
- 2.c8R#
- 1...Rf6
- 2.Sxf6#
- 1...Sb4
- 2.Qxb8#
- 1...Sc5
- 2.Qxb8#
- 1...Rc5!
- threat
- 1.Rb2?
- threat
- 2.Rf8#
- 1...d5
- 2.Sf6#
- 1...d6
- 2.c8Q#
- 1...Rd6
- 2.c8Q#
- 2.c8R#
- 1...Rf6
- 2.Sxf6#
- 1...Sb4
- 2.Qxb8#
- 1...Sc5
- 2.Qxb8#
- 1...Rc5!
- threat
- 1.Rb3?
- threat
- 2.Rf8#
- 1...d5
- 2.Sf6#
- 1...d6
- 2.c8Q#
- 1...Rd6
- 2.c8Q#
- 2.c8R#
- 1...Rf6
- 2.Sxf6#
- 1...Sb4
- 2.Qxb8#
- 1...Sc5
- 2.Qxb8#
- 1...Rc5!
- threat
- 1.Rxc4?
- threat
- 2.Rf8#
- 1...d5
- 2.Sf6#
- 1...d6
- 2.c8Q#
- 1...Rd6
- 2.c8Q#
- 2.c8R#
- 1...Rf6
- 2.Sxf6#
- 1...Sb4
- 2.Qxb8#
- 1...Sc5
- 2.Qxb8#
- 1...Rc5!
- threat
- 1.Rxb7?
- threat
- 2.Rf8#
- 1...d5
- 2.Sf6#
- 2.Bxc6#
- 1...d6
- 2.Bxc6#
- 2.c8Q#
- 2.c8R#
- 1...Rd6
- 2.c8Q#
- 2.c8R#
- 1...Rf6
- 2.Sxf6#
- 1...Sb4
- 2.Rxb8#
- 2.Qxb8#
- 1...Sc5
- 2.Rxb8#
- 2.Qxb8#
- 1...Rc5!
- threat
- 1.cxb8Q+?
- 1...Rc8
- 2.Qxc8#
- 1...Sxb8!
- 1...Rc8
- 1.cxb8R+?
- 1...Rc8
- 2.Rxc8#
- 1...Sxb8!
- 1...Rc8
- 1.Rbb1?
- Keys
- 1.Rb6!
- threat
- 2.Rf8#
- 1...d5
- 2.Sf6#
- 1...d6
- 2.c8Q#
- 1...Rc5
- 2.Re6#
- 1...Rd6
- 2.c8Q#
- 2.c8R#
- 1...Rf6
- 2.Sxf6#
- 1...Sb4
- 2.Qxb8#
- 1...Sc5
- 2.Qxb8#
- threat
- 1.Rb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- R(c);N_PINP(G),P_SPINP(e)::P=Q
- S(b);N_GUARD,XR(E)::QAR(H),XB(f)
- S(b);N_GUARD::QAR(H),XB(f)
- S(b);N_GUARD,XP(G)::QAR(H),XB(f)
- P(e);N_PINP(G),P_SPINR(c)::P=Q
- Tries
- Try
- R(E);
- Threat
- R1(A)
- Vars
- P(e);P_SPINR(c)::S(I)
- P(e);N_PINP(G),P_SPINR(c)::P=Q
- R(c);N_PINP(G),P_SPINP(e)::P=Q
- R(c);N_GUARD,P_SPINP(e)::S(I),XR(c)
- S(b);N_GUARD::QAR(H),XB(f)
- Refutation
- R(c);P_SPINP(e)
- Try
- R(E);
- Threat
- R1(A)
- Vars
- P(e);P_SPINR(c)::S(I)
- P(e);N_PINP(G),P_SPINR(c)::P=Q
- R(c);N_PINP(G),P_SPINP(e)::P=Q
- R(c);N_GUARD,P_SPINP(e)::S(I),XR(c)
- S(b);N_GUARD::QAR(H),XB(f)
- Refutation
- R(c);P_SPINP(e)
- Try
- R(E);
- Threat
- R1(A)
- Vars
- P(e);P_SPINR(c)::S(I)
- P(e);N_PINP(G),P_SPINR(c)::P=Q
- R(c);N_PINP(G),P_SPINP(e)::P=Q
- R(c);N_GUARD,P_SPINP(e)::S(I),XR(c)
- S(b);N_GUARD::QAR(H),XB(f)
- Refutation
- R(c);P_SPINP(e)
- Try
- R(E);XP(a)
- Threat
- R1(A)
- Vars
- P(e);P_SPINR(c)::S(I)
- P(e);N_PINP(G),P_SPINR(c)::P=Q
- R(c);N_PINP(G),P_SPINP(e)::P=Q
- R(c);N_GUARD,P_SPINP(e)::S(I),XR(c)
- S(b);N_GUARD::QAR(H),XB(f)
- Refutation
- R(c);P_SPINP(e)
- Try
- R(E);XP(d)
- Threat
- R1(A)
- Vars
- R(c);N_PINP(G),P_SPINP(e)::P=Q
- R(c);N_GUARD,P_SPINP(e)::S(I),XR(c)
- Refutation
- R(c);P_SPINP(e)
- Try
- P(G);CHECK,N_SPINP(G),XB(f)
- Vars
- R(c);N_GUARD,P_SPINP(e),P_SPINR(c)::QAR2(G),XR(c)
- Refutation
- S(b);P_SPINS(b),XQ(G)
- Try
- P(G);CHECK,N_SPINP(G),XB(f)
- Vars
- R(c);N_GUARD,P_SPINP(e),P_SPINR(c)::R(G),XR(c)
- Refutation
- S(b);P_SPINS(b),XR(G)
- Try
- Actual
- R(E);
- Threat
- R1(A)
- Vars
- P(e);P_SPINR(c)::S(I)
- P(e);N_PINP(G),P_SPINR(c)::P=Q
- R(c);OGATE,P_SPINP(e)::R(E)
- R(c);N_PINP(G),P_SPINP(e)::P=Q
- R(c);N_GUARD,P_SPINP(e)::S(I),XR(c)
- S(b);N_GUARD::QAR(H),XB(f)
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).