MESON Chess Problem Database

Problem Display
PID: 11403 (1B3R2/1rq5/1p3bpn/p5R1/rQn2k1P/p1pP4/2Np1P2/K2B4 w - - 0 1)

Zilahi, Zoltan

Le Probleme, 1938

1B3R2/1rq5/1p3bpn/p5R1/rQn2k1P/p1pP4/2Np1P2/K2B4

#2

10 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Bxe5#
    • 1...Qd6
      • 2.Bxd6#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qd4#
      • 1...Sb2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
        • 2.fxe3#
      • 1...Se5
        • 2.Qe3#
      • 1...Sd6
        • 2.Qe3#
        • 2.Qe5#
      • 1...Sf5
        • 2.Rg4#
      • 1...Sf7
        • 2.Rg4#
      • 1...bxc5!
  • Keys
    • 1.Qxc3!
      • threat
        • 2.Qd4#
      • 1...Sb2
        • 2.Qxd2#
      • 1...Se3
        • 2.fxe3#
      • 1...Se5
        • 2.Qxd2#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sf5
        • 2.Rg4#
      • 1...Sf7
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(m);OGATE::B(I),XQ(m)
  • Tries
    • Try
      • Q(F);N_PINS(e)
      • Threat
        • QAR2(F)
      • Vars
        • S(e);N_GUARD::QAB1(F)
        • S(e);N_GUARD,N_SPINQ(m)::QAB1(F)
        • S(k);N_GUARD,N_SPINB(i)::R1(H)
      • Refutation
        • P(h);XQ(F)
  • Actual
    • Q(F);N_PINS(e),P_SPINQ(F),XP(c)
    • Threat
      • QAR2(F)
    • Vars
      • S(e);N_PINQ(F)::QAB(F),XP(a)
      • S(e);OGATE::P(D),XS(e)
      • S(e);N_PINQ(F),N_SPINQ(m)::QAB(F),XP(a)
      • S(e);N_GUARD,N_SPINQ(m),S_CUTQ(m)::QAB1(F)
      • S(k);N_GUARD,N_SPINB(i),SBLOCK::R1(H)
      • S(k);N_GUARD,N_SPINB(i)::QAR2(F),XB(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).