MESON Chess Problem Database

Problem Display
PID: 68348 (1KR3Br/3p1Nb1/2bn3p/2Nk4/P1p5/2P1Q3/1R6/3r4 w - - 0 1)

Day, EJ

Chess, 1949

1KR3Br/3p1Nb1/2bn3p/2Nk4/P1p5/2P1Q3/1R6/3r4

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Qxe5#
    • 1...Bf8
      • 2.Qe5#
  • Tries
    • 1.Rd2+?
      • 1...Bd4
        • 2.Qxd4#
        • 2.Qe5#
      • 1...Rxd2!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qxd6#
      • 1...Kxc5
        • 2.Rb5#
      • 1...Sxf7
        • 2.Bxf7#
      • 1...Sxc8
        • 2.Sxh8#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bf8
        • 2.Qe5#
      • 1...Se4
        • 2.Sxh8#
      • 1...Sb5
        • 2.Sxh8#
      • 1...Sf5
        • 2.Sxh8#
      • 1...Sb7
        • 2.Sxh8#
      • 1...Se8
        • 2.Sxh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(h);N_GUARD::QAR1(C),XB(h)
    • B(h);N_GUARD::QAR1(C)
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • R(a);XR(A)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XS(e)
    • Vars
      • K(c);OGATEB,P-FLIGHT,P_SPINB(d),P_SPINS(e),XS(E)::R1(A)
      • S(e);OGATE,P_SPINS(e),XS(F)::B(I),XS(e)
      • S(e);N_GUARD,XR(H)::B(I)+S(F),XR(i)
      • B(h);N_GUARD::QAR1(C),XB(h)
      • B(h);N_GUARD::QAR1(C)
      • S(e);N_GUARD::B(I)+S(F),XR(i)
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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).