MESON Chess Problem Database

Problem Display
PID: 16535 (2r1q2r/B1p2P2/B1k1N2Q/4KN2/8/3R4/2n5/8 w - - 0 1)

Kipping, Cyril Stanley

Chess, 1941

2r1q2r/B1p2P2/B1k1N2Q/4KN2/8/3R4/2n5/8

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.Sed4#
      • 2.Sd8#
      • 2.Rc3#
    • 1...Qxf7
      • 2.Sd8#
    • 1...Qxe6+
      • 2.Qxe6#
    • 1...Qe7
      • 2.Sxe7#
    • 1...Qd8
      • 2.Sxd8#
    • 1...Qf8
      • 2.Sd8#
    • 1...Qg8
      • 2.Se7#
      • 2.Sd8#
    • 1...Rf8
      • 2.Qh1#
  • Tries
    • 1.fxe8Q+?
      • 1...Rhxe8
        • 2.Qh1#
      • 1...Rcxe8!
    • 1.fxe8B+?
      • 1...Rhxe8
        • 2.Qh1#
      • 1...Rcxe8!
    • 1.f8Q?
      • threat
        • 2.Qc5#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...Qxf8
        • 2.Sd8#
      • 1...Rxf8
        • 2.Qh1#
      • 1...Qe7
        • 2.Sxe7#
      • 1...Sd4!
  • Keys
    • 1.f8S!
      • threat
        • 2.Rc3#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...Qxf8
        • 2.Sd8#
      • 1...Rxf8
        • 2.Qh1#
      • 1...Qe7
        • 2.Sxe7#
      • 1...Sa3
        • 2.Sd4#
      • 1...Se3
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_PINS(E),XP(H)::QAR(F)+S(E),DCHECK
    • Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR2(F),XQ(e)
    • Q(e);N_GUARD::S(C),XQ(e)
    • Q(e);N_PINS(E)::QAR(F)+S(E),DCHECK,XQ(e)
    • Q(e);N_PINS(E)::QAR(F)+S(E),DCHECK
    • R(f);N_GUARD::QAB(F)
  • Tries
    • Try
      • P(H);CHECK,N_SPINS(E),XQ(e)
      • Vars
        • R(f);P_PINS(E),XQ(H)::QAB(F)
      • Refutation
        • R(d);P_PINS(E),XQ(H)
    • Try
      • P(H);CHECK,N_SPINS(E),XQ(e)
      • Vars
        • R(f);P_PINS(E),XB(H)::QAB(F)
      • Refutation
        • R(d);P_PINS(E),XB(H)
    • Try
      • P(H);
      • Threat
        • QAR1(H)
      • Vars
        • Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR2(F),XQ(e)
        • Q(e);N_PINS(E),XQ(H)::QAR(F)+S(E),DCHECK
        • R(f);N_GUARD,XQ(H)::QAB(F)
        • Q(e);N_GUARD::S(C),XQ(e)
      • Refutation
        • S(a);
  • Actual
    • P(H);
    • Threat
      • R(A)
    • Vars
      • Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR2(F),XQ(e)
      • Q(e);N_PINS(E),XS(H)::QAR(F)+S(E),DCHECK
      • R(f);N_GUARD,XS(H)::QAB(F)
      • Q(e);N_GUARD::S(C),XQ(e)
      • S(a);N_GUARD::S(C)
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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).