MESON Chess Problem Database

Problem Display
PID: 145887 (1Kb4b/1p2Q1n1/1r6/1r1Np2p/4k3/2PR1RpP/BP6/5n1q w - - 0 1)

Sparke, Arthur M

Good Companions (December), 1917

1Kb4b/1p2Q1n1/1r6/1r1Np2p/4k3/2PR1RpP/BP6/5n1q

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Bxd5#
    • 1...Re6
      • 2.Qh4#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Be6
      • 2.Sf6#
    • 1...Sd2
      • 2.Rde3#
    • 1...Sh2
      • 2.Rde3#
    • 1...Se3
      • 2.Rdxe3#
    • 1...Se6
      • 2.Qh7#
  • Tries
    • 1.Bc4?
      • threat
        • 2.Rf4#
      • 1...Rxd5
        • 2.Bxd5#
      • 1...Re6
        • 2.Qh4#
      • 1...Rf6
        • 2.Sxf6#
      • 1...Be6
        • 2.Sf6#
      • 1...Se6
        • 2.Qh7#
      • 1...Qxf3!
  • Keys
    • 1.Bb1!
      • threat
        • 2.Rf4#
      • 1...Qxf3
        • 2.Rd4#
      • 1...Rxd5
        • 2.Rde3#
      • 1...Re6
        • 2.Qh4#
      • 1...Rf6
        • 2.Sxf6#
      • 1...Be6
        • 2.Sf6#
      • 1...Se6
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(e);OGATE,XS(G)::B(A),XR(e)
    • R(h);N_SPINP(f),S_CUTB(k)::QAR(H)
    • R(h);N_GUARD::S(G),XR(h)
    • B(k);N_SPINP(f),S_CUTR(h)::S(G)
    • S(a);N_GUARD::R1(D)
    • S(a);N_GUARD::R1(D),XS(a)
    • S(j);N_SPINP(f),OGATE::QAB(H)
  • Tries
    • Try
      • B(A);
      • Threat
        • R1(E)
      • Vars
        • R(e);OGATE,XS(G)::B(A),XR(e)
        • R(h);N_SPINP(f),S_CUTB(k)::QAR(H)
        • R(h);N_GUARD::S(G),XR(h)
        • B(k);N_SPINP(f),S_CUTR(h)::S(G)
        • S(j);N_SPINP(f),OGATE::QAB(H)
      • Refutation
        • Q(b);XR(E)
  • Actual
    • B(A);
    • Threat
      • R1(E)
    • Vars
      • Q(b);SBLOCK,XR(E)::B(A)+R(D),DCHECK
      • R(e);SBLOCK,XS(G)::B(A)+R(D),DCHECK
      • R(h);N_SPINP(f),S_CUTB(k)::QAR(H)
      • R(h);N_GUARD::S(G),XR(h)
      • B(k);N_SPINP(f),S_CUTR(h)::S(G)
      • S(j);N_SPINP(f),OGATE::QAB(H)
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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).