MESON Chess Problem Database

Problem Display
PID: 11127 (1Kb2q2/R1P1kP2/2R1NNP1/6B1/6PQ/8/8/8 w - - 0 1)

Mansfield, Comins

1st Prize, Skakbladet, 1936

1Kb2q2/R1P1kP2/2R1NNP1/6B1/6PQ/8/8/8

#2

11 + 3

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qd8
      • 2.cxd8Q#
      • 2.cxd8B#
    • 1...Qe8
      • 2.fxe8Q#
      • 2.fxe8R#
    • 1...Qg8
      • 2.fxg8S#
    • 1...Ba6+
      • 2.c8S#
    • 1...Bd7+
      • 2.Se8#
  • Tries
    • 1.Sxf8?
      • threat
        • 2.S6d7#
        • 2.S6h7#
      • 1...Bd7
        • 2.S6xd7#
        • 2.S6h7#
      • 1...Kxf8!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qb4#
      • 1...Ba6+
        • 2.c8S#
      • 1...Bxe6+
        • 2.c8Q#
        • 2.c8R#
      • 1...Bb7+
        • 2.Sd8#
      • 1...Bd7+
        • 2.Se8#
      • 1...Qd8
        • 2.cxd8Q#
        • 2.cxd8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(c);OGATE::PXQ(c)=Q
    • Q(c);OGATE::PXQ(c)=S
    • B(b);CHECK,OGATE::P=S
    • B(b);CHECK,SBLOCK::B(C)+S(F)
  • Tries
    • Try
      • S(E);XQ(c)
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • B(b);CHECK,OGATE::P=S
      • B(b);CHECK,OGATE,P_SPINB(b),XS(E)::P=Q
      • B(b);CHECK,N_GUARD::QAR(B)+S(E)
      • B(b);CHECK,SBLOCK::B(C)+S(F)
      • Q(c);OGATE::PXQ(c)=Q
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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).