MESON Chess Problem Database

Problem Display
PID: 70979 (8/3K2n1/7Q/5k1p/3P1b1r/5R1R/5N2/7B w - - 0 1)

Sheppard, Charles William

Good Companions, 1918

8/3K2n1/7Q/5k1p/3P1b1r/5R1R/5N2/7B

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh3
      • 2.Rxf4#
  • Tries
    • 1.Rhg3?
      • threat
        • 2.Rg5#
        • 2.Qg5#
        • 2.Qg6#
      • 1...Se6
        • 2.Qxe6#
        • 2.Qg6#
      • 1...Rg4!
    • 1.Qe6+?
      • 1...Kg5
        • 2.Se4#
      • 1...Sxe6!
  • Keys
    • 1.Se4!
      • 1...Kxe4
        • 2.Rxf4#
      • 1...Kg4
        • 2.Qxf4#
      • 1...Rxh3
        • 2.Rxf4#
      • 1...Rg4
        • 2.Sd6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Se8
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,XR(D)::R1(C),XB(a)
  • Tries
    • Try
      • R(D);
      • Threat
        • DUALS(3)
      • Refutation
        • R(b);
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);N_SPINB(a),P-FLIGHT::S(B)
      • Refutation
        • S(e);XQ(F)
  • Actual
    • S(B);
    • Vars
      • K(c);N_SPINB(a),S_FLIGHT,XS(B)::B(A)+R(C),DCHECK,XB(a)
      • K(c);N_SPINB(a),S_FLIGHT::QAR1(F),XB(a)
      • R(b);N_GUARD,XR(D)::R1(C),XB(a)
      • R(b);SBLOCK::S(B)
      • S(e);N_GUARD::QAB1(F),XS(e)
      • S(e);N_GUARD::QAB1(F)
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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).