MESON Chess Problem Database

Problem Display
PID: 55492 (7Q/q2rp3/B3N3/4Pp2/2n1kN2/RR4P1/K1pPP3/2b5 w - - 0 1)

Zappas, Byron

Probleemblad, 1954

7Q/q2rp3/B3N3/4Pp2/2n1kN2/RR4P1/K1pPP3/2b5

#2

11 + 8

23 Die Schwalbe 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sg5#
    • 1...Rd4
      • 2.Sg5#
    • 1...Sb6
      • 2.Re3#
    • 1...Sd6
      • 2.Bd3#
  • Keys
    • 1.d4!
      • threat
        • 2.Qh1#
      • 1...Qxd4
        • 2.Sg5#
      • 1...Rxd4
        • 2.Sg5#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Sd2
        • 2.Re3#
      • 1...Se3
        • 2.Bd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(f);SBLOCK::S(J)
    • R(g);SBLOCK::S(J)
    • S(c);N_GUARD,S_CUTQ(f)::R1(E)
    • S(c);OGATE::B(I)
  • Actual
    • P(B);
    • Threat
      • QAB(K)
    • Vars
      • Q(f);SBLOCK,XP(B)::S(J)
      • R(g);SBLOCK,XP(B)::S(J)
      • S(c);OGATE,XP(H)::QAR1(K),XS(c)
      • S(c);N_GUARD,S_CUTB(a)::R1(E)
      • S(c);OGATE,SBLOCK::B(I)
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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).