MESON Chess Problem Database

Problem Display
PID: 274382 (1Q1r1B1b/1n3pR1/2P1k1p1/3N1brN/2P2R1q/3pK1pp/8/8 w - - 0 1)

le Grand, Henk

Probleemblad, 1953

1Q1r1B1b/1n3pR1/2P1k1p1/3N1brN/2P2R1q/3pK1pp/8/8

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4+
      • 2.Sdxf4#
      • 2.Shxf4#
    • 1...Rxd5
      • 2.Qe8#
    • 1...Rd6
      • 2.Qe8#
    • 1...Re8
      • 2.Qxe8#
    • 1...Be4
      • 2.Rf6#
    • 1...Bg4
      • 2.Rf6#
    • 1...Bxg7
      • 2.Sxg7#
    • 1...f6
      • 2.Re7#
  • Keys
    • 1.Kd4!
      • threat
        • 2.Qe5#
      • 1...Qxf4+
        • 2.Sxf4#
      • 1...Rxd5+
        • 2.cxd5#
      • 1...Bxg7+
        • 2.Sxg7#
      • 1...Rxb8
        • 2.Sc7#
      • 1...Rd6
        • 2.Qe8#
      • 1...Be4
        • 2.Rf6#
      • 1...Bg4
        • 2.Rf6#
      • 1...Sd6
        • 2.Sc7#
      • 1...f6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(k);OGATE,XS(D)::QAR2(H)
    • R(k);OGATE::QAR2(H)
    • R(k);OGATE::QAR2(H),XR(k)
    • B(e);OGATE::R1(C)
    • B(l);XR(G)::S(E),XB(l)
    • P(j);OGATE::R1(G)
  • Actual
    • K(A);P_SPINR(C),P_SPINS(D),S_FLIGHT
    • Threat
      • QAR1(H)
    • Vars
      • Q(d);CHECK,P_PINR(G),XR(C)::S(E),XQ(d)
      • R(k);CHECK,OGATE,XS(D)::P(B),XR(k)
      • B(l);CHECK,XR(G)::S(E),XB(l)
      • R(k);N_PINS(D),XQ(H)::S(D)
      • R(k);OGATE::QAR2(H)
      • B(e);N_PINR(C),P_PINR(G)::R1(C)
      • S(i);N_PINS(D)::S(D)
      • P(j);OGATE::R1(G)
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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).