MESON Chess Problem Database

Problem Display
PID: 142864 (7K/4p3/P1B4k/R6P/2p2p1P/4Q2n/3pqN2/3b4 w - - 0 1)

Zilahi, Zoltan

Schackvarlden, 1935

7K/4p3/P1B4k/R6P/2p2p1P/4Q2n/3pqN2/3b4

#2

8 + 8

103 Problemisten 1946

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qe6#
    • 1...Qf3
      • 2.Qe6#
    • 1...Qxf2
      • 2.Qe6#
    • 1...Sg1
      • 2.Qxf4#
    • 1...Sxf2
      • 2.Qxf4#
  • Tries
    • 1.Qxf4+?
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sxf4!
  • Keys
    • 1.Bf3!
      • threat
        • 2.Sg4#
      • 1...Qxf3
        • 2.Qe6#
      • 1...Qxf2
        • 2.Qe6#
      • 1...Sxf2
        • 2.Qxf4#
      • 1...Sg5
        • 2.hxg5#
      • 1...e5
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_GUARD::QAR(B)
    • Q(c);N_GUARD,XS(A)::QAR(B)
    • S(d);N_GUARD::QAB(B),XP(f)
    • S(d);N_GUARD,XS(A)::QAB(B),XP(f)
  • Tries
    • Try
      • Q(B);CHECK,XP(f)
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB1(B),XS(d)
      • Refutation
        • S(d);XQ(B)
  • Actual
    • B(G);
    • Threat
      • S(A)
    • Vars
      • Q(c);N_GUARD,XB(G)::QAR(B)
      • Q(c);N_GUARD,XS(A)::QAR(B)
      • S(d);N_GUARD,XS(A)::QAB(B),XP(f)
      • S(d);N_SPINP(f),OGATE::P(C),XS(d)
      • P(h);N_GUARD,S_CUTQ(c)::QAR(B)
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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).