MESON Chess Problem Database

Problem Display
PID: 140674 (r7/1r6/7n/1n1B4/5P2/5P1p/5Q1b/3N1K1k w - - 0 1)

Lawton, Howard

The Problemist, 1943

r7/1r6/7n/1n1B4/5P2/5P1p/5Q1b/3N1K1k

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qxg1#
    • 1...Bg3
      • 2.Qg1#
    • 1...Bxf4
      • 2.Qg1#
    • 1...Sg4
      • 2.fxg4#
  • Keys
    • 1.Qa7!
      • threat
        • 2.Sf2#
      • 1...Bxf4
        • 2.Qg1#
      • 1...Bg1
        • 2.Qxg1#
      • 1...Bg3
        • 2.Qg1#
      • 1...Sg4
        • 2.fxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::QAR1(C),XB(b)
    • B(b);N_GUARD::QAR1(C)
    • B(b);N_GUARD,XP(E)::QAR1(C)
    • S(e);OGATE::B(F)+P(D),XS(e)
  • Actual
    • Q(C);
    • Threat
      • S(A)
    • Vars
      • B(b);N_GUARD,XP(E)::QAR1(C)
      • B(b);N_GUARD::QAR1(C),XB(b)
      • B(b);N_GUARD::QAR1(C)
      • S(e);OGATE::B(F)+P(D),XS(e)
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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).