MESON Chess Problem Database
Problem Display
PID: 51434 (b7/3P4/q2pN3/1pP3QK/r2PkrP1/2P1p3/1N6/2BB4 w - - 0 1)
Sumner, Christopher Richard Benson
The Guardian, 1960
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Rf3
- 2.Bc2#
- 1...Rf5
- 2.Qxf5#
- 1...Bd5
- 2.Qxf4#
- 1...dxc5
- 2.Sxc5#
- 2.Qe5#
- 1...d5
- 2.Qxf4#
- 2.Qe5#
- 1...Rf3
- Tries
- 1.Qd5+?
- 1...Bxd5
- 2.Sg5#
- 1...Kxd5!
- 1...Bxd5
- 1.Qg6+?
- 1...Rf5+
- 2.Qxf5#
- 1...Kd5!
- 1...Rf5+
- 1.Qd5+?
- Keys
- 1.Sc7!
- threat
- 2.Qe7#
- 1...Rxg4
- 2.Qxg4#
- 1...dxc5
- 2.Qe5#
- 1...e2
- 2.Qxf4#
- 1...Rf1
- 2.Qxe3#
- 1...Rf2
- 2.Qxe3#
- 1...Rf3
- 2.Bc2#
- 1...Rf5
- 2.Qxf5#
- 1...Rf6
- 2.Qxe3#
- 1...Rf7
- 2.Qxe3#
- 1...Rf8
- 2.Qxe3#
- 1...Bd5
- 2.Qxd5#
- 1...d5
- 2.Qe5#
- threat
- 1.Sc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 9
- REMOVED MATES = 0
- Sets
- R(d);SBLOCK::B(B)
- R(d);N_GUARD,P_PINQ(H)::QAB1(H),XR(d)
- B(h);SBLOCK::QAR1(H),XR(d)
- Tries
- Try
- Q(H);CHECK
- Vars
- B(h);SBLOCK,XQ(H)::S(J)
- Refutation
- K(c);S_FLIGHT,XQ(H)
- Try
- Q(H);CHECK
- Vars
- R(d);CHECK,N_GUARD,P_SPINR(d)::QAB1(H),XR(d)
- Refutation
- K(c);S_FLIGHT
- Try
- Actual
- S(J);
- Threat
- QAR(H)
- Vars
- R(d);OGATE,XP(F)::QAR2(H),XR(d)
- P(g);N_GUARD,XP(G)::QAR1(H)
- P(a);::QAR1(H),XR(d)
- R(d);OGATE::QAR1(H),XP(a)
- R(d);SBLOCK::B(B)
- R(d);N_GUARD,P_PINQ(H)::QAB1(H),XR(d)
- B(h);N_GUARD::QAB1(H),XB(h)
- P(g);N_GUARD::QAR1(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).