MESON Chess Problem Database

Problem Display
PID: 1958 (4Q3/4PPr1/6k1/6P1/5pPp/8/q5n1/5b1K w - - 0 1)

Loyd, Sam

New York Musical World, 1859

4Q3/4PPr1/6k1/6P1/5pPp/8/q5n1/5b1K

#2

6 + 7

1679 American Chess Nuts 1868
5206 Sam Loyd and His Chess Problems 1913

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8
      • 2.Qxg8#
      • 2.fxg8Q#
  • Tries
    • 1.f8Q+?
      • 1...Kxg5
        • 2.Qh5#
        • 2.Qxg7#
      • 1...Kh7
        • 2.Qh5#
        • 2.Qh8#
      • 1...Rf7
        • 2.Qh6#
        • 2.Qg8#
      • 1...Qf7!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qh5#
      • 1...Kxg5
        • 2.Qxg7#
      • 1...Kxf7
        • 2.e8Q#
      • 1...Rxf7
        • 2.Qh6#
      • 1...Rh7
        • 2.Qf6#
      • 1...Rg8
        • 2.Qxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(E);CHECK
      • Refutation
        • Q(b);P_SPINQ(b)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • K(f);P-FLIGHT,XP(C)::QAR2(F),XR(g)
      • K(f);S_FLIGHT,XP(E)::P=Q
      • R(g);SBLOCK,XP(E)::QAR1(F)
      • R(g);OGATE,SBLOCK::QAR1(F)
      • R(g);OGATEB::QAR2(F),XR(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).