MESON Chess Problem Database

Problem Display
PID: 109706 (1Q2n3/b3K3/r2N4/2P1k3/4P3/2R1P1P1/1R6/B1nr4 w - - 0 1)

Wielgos, Oskar

To Mat, 1962

1Q2n3/b3K3/r2N4/2P1k3/4P3/2R1P1P1/1R6/B1nr4

#2

10 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc7
      • 2.Qh8#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Sf7#
      • 1...Rdxd6
        • 2.Ra2#
      • 1...Raxd6
        • 2.Rd2#
      • 1...Sxd6
        • 2.Qh8#
      • 1...Rd4
        • 2.exd4#
      • 1...Bxc5!
    • 1.Qc8?
      • threat
        • 2.Qf5#
        • 2.Qe6#
      • 1...Rdxd6
        • 2.Qf5#
      • 1...Raxd6
        • 2.Qf5#
      • 1...Sxd6
        • 2.Qe6#
      • 1...Rf1
        • 2.Qe6#
      • 1...Sc7
        • 2.Qf5#
        • 2.Qh8#
      • 1...Sg7!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Sf7#
      • 1...Rdxd6
        • 2.Ra3#
      • 1...Raxd6
        • 2.Rd3#
      • 1...Bxc5
        • 2.Rxc5#
      • 1...Sxd6
        • 2.Qh8#
      • 1...Rd4
        • 2.exd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(f);OGATE::QAB(J)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAB(J)+S(H),DCHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b),XS(H)::B(A)+R(B)
        • R(d);N_GUARD,P_SPINR(d),XS(H)::B(A)+R(B)
        • S(f);OGATE,P_SPINS(f),XS(H)::QAB(J)
        • R(b);OGATE::P(D),XR(b)
      • Refutation
        • B(e);P_PINS(H),XP(G)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XS(H)::QAR1(J)
        • R(d);XS(H)::QAR1(J)
        • S(f);XS(H)::QAR1(J)
        • R(b);::QAR1(J)
      • Refutation
        • S(f);
  • Actual
    • R(B);
    • Threat
      • QAB(J)+S(H),DCHECK
    • Vars
      • R(b);N_GUARD,P_SPINR(b),XS(H)::B(A)+R(C)
      • R(d);N_GUARD,P_SPINR(d),XS(H)::B(A)+R(C)
      • B(e);OGATE,P_PINS(H),XP(G)::B(A)+R(C),DCHECK,XB(e)
      • S(f);OGATE,P_SPINS(f),XS(H)::QAB(J)
      • R(b);OGATE::P(D),XR(b)
HTML5 logo

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).