MESON Chess Problem Database
Problem Display
PID: 166008 (k7/8/KPP5/8/8/Q7/5r2/1r6 w - - 0 1)
Lincoln, Robert A
StrateGems, 2015
#2
4 + 3
SOLUTION
- SOUND
- Sets
- 1...Rb2
- 2.Qf8#
- 1...Rc2
- 2.Qf8#
- 1...Rg2
- 2.Qf8#
- 1...Rh2
- 2.Qf8#
- 1...Rf8
- 2.Qxf8#
- 1...Rb2
- Tries
- 1.b7+?
- 1...Kb8
- 2.Qd6#
- 1...Rxb7!
- 1...Kb8
- 1.b7+?
- Keys
- 1.c7!
- threat
- 2.c8Q#
- 2.c8R#
- 1...Rxb6+
- 2.Kxb6#
- 1...Ra1
- 2.b7#
- 2.c8Q#
- 2.c8R#
- 1...Rc1
- 2.b7#
- 1...Rd1
- 2.b7#
- 2.c8Q#
- 2.c8R#
- 1...Re1
- 2.b7#
- 2.c8Q#
- 2.c8R#
- 1...Rbf1
- 2.b7#
- 2.c8Q#
- 2.c8R#
- 1...Rg1
- 2.b7#
- 2.c8Q#
- 2.c8R#
- 1...Rh1
- 2.b7#
- 2.c8Q#
- 2.c8R#
- 1...Rbb2
- 2.c8Q#
- 2.c8R#
- 1...Rb3
- 2.c8Q#
- 2.c8R#
- 1...Rb4
- 2.c8Q#
- 2.c8R#
- 1...Rb5
- 2.c8Q#
- 2.c8R#
- 1...Rff1
- 2.c8Q#
- 2.c8R#
- 1...Ra2
- 2.c8Q#
- 2.c8R#
- 1...Rfb2
- 2.Qf8#
- 2.Qf3#
- 2.c8Q#
- 2.c8R#
- 1...Rc2
- 2.Qf8#
- 1...Rd2
- 2.c8Q#
- 2.c8R#
- 1...Re2
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.Qf8#
- 2.Qf3#
- 2.c8Q#
- 2.c8R#
- 1...Rh2
- 2.Qf8#
- 2.Qf3#
- 2.c8Q#
- 2.c8R#
- 1...Rf3
- 2.Qxf3#
- 2.c8Q#
- 2.c8R#
- 1...Rf4
- 2.c8Q#
- 2.c8R#
- 1...Rf5
- 2.c8Q#
- 2.c8R#
- 1...Rf6
- 2.c8Q#
- 2.c8R#
- 1...Rf7
- 2.c8Q#
- 2.c8R#
- 1...Rf8
- 2.Qxf8#
- threat
- 1.c7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- R(b);N_GUARD::QAR(A)
- R(b);N_GUARD::QAR(A),XR(b)
- Tries
- Try
- P(C);CHECK
- Vars
- K(c);P-FLIGHT::QAB(A)
- Refutation
- R(a);XP(C)
- Try
- Actual
- P(D);
- Threat
- P=Q
- Vars
- R(a);CHECK,XP(C)::QAR(A)+K(B),XR(a)
- R(a);N_GUARD::P(C)
- R(a);::P=Q
- R(b);::P=Q
- R(b);P_PINQ(A)::P=Q
- R(b);N_GUARD::QAR(A)
- R(b);P_PINP(C)::P=Q
- R(b);N_GUARD::QAR(A),XR(b)
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).