MESON Chess Problem Database

Problem Display
PID: 153304 (4k3/4B1R1/2P5/4n3/8/6K1/2Q5/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2012

4k3/4B1R1/2P5/4n3/8/6K1/2Q5/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qg6#
    • 1...Sc4
      • 2.Qg6#
    • 1...Sg4
      • 2.Qg6#
    • 1...Sxc6
      • 2.Qxc6#
    • 1...Sg6
      • 2.Qxg6#
    • 1...Sd7
      • 2.Qg6#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd8#
      • 1...Sf7
        • 2.Qd7#
      • 1...Sd3
        • 2.Qh5#
      • 1...Sd7
        • 2.Qh5#
        • 2.Qxd7#
        • 2.cxd7#
      • 1...Sxc6!
    • 1.Qb3?
      • threat
        • 2.Qg8#
        • 2.Qb8#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sc4
        • 2.Qb8#
      • 1...Sg6
        • 2.Qf7#
        • 2.Qb8#
      • 1...Sd7
        • 2.Qf7#
      • 1...Sxc6!
    • 1.Qa4?
      • threat
        • 2.Qa8#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sd7
        • 2.cxd7#
      • 1...Sf7!
    • 1.Qf5?
      • threat
        • 2.Qc8#
        • 2.Qf8#
      • 1...Sf7
        • 2.Qd7#
        • 2.Qxf7#
      • 1...Sg6
        • 2.Qxg6#
        • 2.Qd7#
        • 2.Qc8#
        • 2.Qf7#
      • 1...Sd7
        • 2.Qg6#
        • 2.Qxd7#
        • 2.Qh5#
        • 2.Qf7#
        • 2.cxd7#
      • 1...Sxc6!
    • 1.Qg6+?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sxg6!
    • 1.Qa2?
      • threat
        • 2.Qg8#
        • 2.Qa8#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sc4
        • 2.Qa8#
      • 1...Sg6
        • 2.Qf7#
        • 2.Qa8#
      • 1...Sd7
        • 2.Qf7#
      • 1...Sxc6!
    • 1.Qc4?
      • threat
        • 2.Qg8#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg6
        • 2.Qf7#
      • 1...Sd7
        • 2.Qf7#
      • 1...Sxc4!
    • 1.Qc5?
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sd3
        • 2.Qh5#
      • 1...Sf3
        • 2.Qh5#
      • 1...Sc4
        • 2.Qh5#
      • 1...Sg4
        • 2.Qh5#
      • 1...Sd7
        • 2.Qh5#
      • 1...Sf7
        • 2.Rg8#
      • 1...Sg6!
    • 1.c7?
      • threat
        • 2.c8Q#
      • 1...Kd7
        • 2.c8Q#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qg6#
        • 2.c8Q#
        • 2.c8R#
      • 1...Sf7!
  • Keys
    • 1.Qe4!
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sd3
        • 2.Qg6#
      • 1...Sf3
        • 2.Qg6#
      • 1...Sc4
        • 2.Qg6#
      • 1...Sg4
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sd7
        • 2.Qg6#
      • 1...Sf7
        • 2.Rg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(A)
    • S(a);OGATE,XP(C)::QAB(A),XS(a)
    • S(a);N_GUARD::QAB(A),XS(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD::QAB1(A)
        • S(a);N_GUARD::QAB(A)
      • Refutation
        • S(a);XP(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);::QAR(A)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • S(a);XP(C)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • S(a);OGATE,P_SPINS(a),XP(C)::QAB(A),XS(a)
        • S(a);OGATE::P(C),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • S(a);XP(C)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);::QAR(A)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • S(a);XP(C)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • S(a);OGATE,XP(C)::QAB(A),XS(a)
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Vars
        • S(a);OGATE,XP(C)::QAB(A),XS(a)
        • S(a);OGATE::QAB(A)
        • S(a);SBLOCK::R(E)
      • Refutation
        • S(a);
    • Try
      • P(C);
      • Threat
        • P=Q
      • Vars
        • K(b);S_FLIGHT::P=Q
        • S(a);N_GUARD::QAB(A),XS(a)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Vars
      • S(a);OGATE,XP(C)::QAB(A),XS(a)
      • S(a);N_GUARD::QAB(A)
      • S(a);N_GUARD::QAB(A),XS(a)
      • S(a);SBLOCK::R(E)
HTML5 logo

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).