MESON Chess Problem Database

Problem Display
PID: 17011 (8/4R1rN/4p2N/2BPk2n/5n1P/3b1QP1/8/K7 w - - 0 1)

Whyatt, William Albert

Melbourne Leader, 1945

8/4R1rN/4p2N/2BPk2n/5n1P/3b1QP1/8/K7

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Rxe6#
    • 1...Sg2
      • 2.Rxe6#
    • 1...Sh3
      • 2.Rxe6#
    • 1...Sg6
      • 2.Sg4#
      • 2.Rxe6#
    • 1...Sf6
      • 2.gxf4#
  • Tries
    • 1.Qxd3?
      • threat
        • 2.Qf5#
        • 2.Qd4#
      • 1...Rxe7
        • 2.Sg4#
        • 2.Qd4#
      • 1...Sxg3
        • 2.Qd4#
      • 1...Rg5
        • 2.Sf7#
        • 2.Qd4#
      • 1...Rf7
        • 2.Sg4#
        • 2.Sxf7#
        • 2.Qd4#
      • 1...Se2
        • 2.Rxe6#
        • 2.Qf5#
      • 1...Sxd3!
    • 1.Qe3+?
      • 1...Be4
        • 2.Qd4#
      • 1...Kxd5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sd7#
      • 1...Kxf6
        • 2.Rxe6#
      • 1...Rxe7
        • 2.Sfg4#
      • 1...Sxf6
        • 2.gxf4#
      • 1...Be4
        • 2.Qc3#
      • 1...Bb5
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::R1(H),XP(e)
    • S(d);N_GUARD::P(C),XS(b)
  • Tries
    • Try
      • Q(B);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);XP(C)::QAB1(B)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);P_SPINB(a)::QAB1(B)
      • Refutation
        • K(c);N_SPINP(e),P-FLIGHT,XP(F)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • K(c);N_SPINP(e),P_SPINS(b),S_FLIGHT,XS(I)::R1(H),XP(e)
      • R(f);N_GUARD,N_SPINP(e),XR(H)::S(I)
      • S(d);N_GUARD,SBLOCK,XS(I)::P(C),XS(b)
      • B(a);OGATE::QAB(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).