MESON Chess Problem Database

Problem Display
PID: 195076 (R2r1rN1/1N1k1P2/1Pp4Q/2p3p1/4n1P1/6b1/2K5/8 w - - 0 1)

Westbury, Eric Ernest

Pittsburgh Gazette-Times, 1918

R2r1rN1/1N1k1P2/1Pp4Q/2p3p1/4n1P1/6b1/2K5/8

#2

8 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf7
      • 2.Rxd8#
    • 1...Sd2
      • 2.Sxc5#
    • 1...Sf2
      • 2.Sxc5#
    • 1...Sc3
      • 2.Sxc5#
    • 1...Sd6
      • 2.Sxc5#
  • Tries
    • 1.Qd6+?
      • 1...Sxd6
        • 2.Sxc5#
      • 1...Bxd6!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Rxg8
        • 2.fxg8Q#
      • 1...Rde8
        • 2.fxe8Q#
      • 1...Rfe8
        • 2.f8S#
      • 1...Sd6
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(h);N_GUARD,XP(F)::R1(G),XR(g)
    • S(b);N_GUARD::S(E),XP(c)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • S(b);SBLOCK,XQ(D)::S(E),XP(c)
      • Refutation
        • B(a);XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAB(D)
    • Vars
      • K(f);S_FLIGHT::QAB1(D)
      • R(h);OGATE,P_SPINR(h),XP(F)::QAR2(D),XR(h)
      • R(h);OGATE,XS(H)::PXR(h)=Q
      • R(g);OGATE::PXR(g)=Q
      • R(h);OGATE,SBLOCK::P=S
      • S(b);N_GUARD,SBLOCK::S(E),XP(c)
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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).