MESON Chess Problem Database

Problem Display
PID: 287267 (7B/4p3/K1Bnrq1N/4kN2/p2p4/r4nP1/5P1b/8 w - - 0 1)

Andrade, Barry Jack da Costa

Holladay, Edgar Dinwiddie

The Problemist, 1948

7B/4p3/K1Bnrq1N/4kN2/p2p4/r4nP1/5P1b/8

#2

7 + 10

6490 yacpdb 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.f4#
    • 1...Sg1
      • 2.f4#
    • 1...Sd2
      • 2.f4#
    • 1...Sh4
      • 2.f4#
    • 1...Sg5
      • 2.f4#
    • 1...Sxf5
      • 2.Sf7#
  • Keys
    • 1.Sh4!
      • threat
        • 2.Sg6#
        • 2.Sg4#
      • 1...Qxh8
        • 2.Sg4#
      • 1...Bxg3
        • 2.Sg6#
      • 1...Sxh4
        • 2.f4#
      • 1...Qg7
        • 2.Sg4#
      • 1...Sc4
        • 2.Sf7#
      • 1...Se4
        • 2.Sf7#
      • 1...Sb5
        • 2.Sf7#
      • 1...Sf5
        • 2.Sf7#
      • 1...Sb7
        • 2.Sf7#
      • 1...Sf7
        • 2.Sxf7#
      • 1...Sc8
        • 2.Sf7#
      • 1...Se8
        • 2.Sf7#
      • 1...d3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 4
  • Sets
    • S(c);OGATE::P(A)
    • S(g);N_GUARD,P_PINB(E),SBLOCK,XS(C)::S(F)
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • Q(i);N_SPINQ(i),XB(G)::S(F)
      • B(a);XP(B)::S(C)
      • S(c);OGATE,XS(C)::P(A)
      • Q(i);::S(F)
      • S(g);N_GUARD,P_PINB(E)::S(F)
      • S(g);N_GUARD,P_PINB(E)::S(F),XS(g)
      • P(e);S_CUTR(b)::S(C),XS(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).