MESON Chess Problem Database

Problem Display
PID: 72178 (3rRb1n/1P1k1P1R/1K1p3n/5pNQ/5B2/3p4/8/8 w - - 0 1)

Carter, SW

Chess, 1952

3rRb1n/1P1k1P1R/1K1p3n/5pNQ/5B2/3p4/8/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8
      • 2.bxc8Q#
      • 2.bxc8B#
    • 1...Rxe8
      • 2.fxe8Q#
    • 1...Be7
      • 2.f8S#
    • 1...Bg7
      • 2.f8S#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qe6#
      • 1...Rxe8
        • 2.Qxe8#
        • 2.fxe8Q#
      • 1...dxe2!
    • 1.Qg6?
      • threat
        • 2.Qe6#
      • 1...Rxe8
        • 2.fxe8Q#
      • 1...Sxg6!
    • 1.b8Q?
      • threat
        • 2.Qc7#
        • 2.Qb7#
        • 2.Qxd8#
      • 1...Rxe8
        • 2.Qc7#
        • 2.Qxe8#
        • 2.fxe8Q#
        • 2.fxe8B#
      • 1...S6xf7
        • 2.Qxd8#
      • 1...S8xf7
        • 2.Qxd8#
      • 1...Rc8
        • 2.Qxc8#
      • 1...Be7
        • 2.Qc7#
        • 2.Qb7#
        • 2.f8S#
      • 1...Rxb8+!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sf6#
      • 1...Rxe8
        • 2.fxe8Q#
      • 1...fxe4
        • 2.Qb5#
      • 1...Be7
        • 2.f8S#
      • 1...Bg7
        • 2.f8S#
      • 1...Sg4
        • 2.Qxf5#
      • 1...Sg8
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(f);OGATE::PXR(f)=Q
    • R(f);OGATE,XR(H)::PXR(f)=Q
    • B(g);OGATE::P=S
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Refutation
        • P(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • R(f);OGATE,XR(H)::PXR(f)=Q
      • Refutation
        • S(h);XQ(C)
    • Try
      • P(E);
      • Threat
        • DUALS(3)
      • Vars
        • S(d);P_SPINS(d),XP(F)::QAR1(E),XR(f)
        • S(h);P_SPINS(h),XP(F)::QAR1(E),XR(f)
        • R(f);N_GUARD::QAB1(E),XR(f)
      • Refutation
        • R(f);CHECK,XQ(E)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • R(f);OGATE,XR(H)::PXR(f)=Q
      • P(b);OGATE,XS(B)::QAB(C)
      • B(g);OGATE::P=S
      • S(d);N_GUARD::QAB(C),XP(b)
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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).