MESON Chess Problem Database

Problem Display
PID: 240116 (b2K1N2/3Q1N2/8/rR1n2pR/4k3/2p1n1P1/4P3/2br2B1 w - - 0 1)

Zilahi, Zoltan

Norsk Sjakkblad, 1937

b2K1N2/3Q1N2/8/rR1n2pR/4k3/2p1n1P1/4P3/2br2B1

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qe6#
    • 1...Sf1
      • 2.Qe6#
    • 1...Sc2
      • 2.Qe6#
    • 1...Sg2
      • 2.Qe6#
    • 1...Sf5
      • 2.Qe6#
    • 1...Sb4
      • 2.Sxg5#
    • 1...Sf4
      • 2.Sxg5#
    • 1...Sb6
      • 2.Sxg5#
    • 1...Sf6
      • 2.Sxg5#
    • 1...Sc7
      • 2.Sxg5#
    • 1...Se7
      • 2.Sxg5#
  • Tries
    • 1.Rb4+?
      • 1...Rd4
        • 2.Qe6#
      • 1...Sc4
        • 2.Qe6#
      • 1...Sxb4!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qe5#
      • 1...Kd4
        • 2.Rb4#
      • 1...Kf5
        • 2.Qf4#
        • 2.Qe6#
      • 1...Sc4
        • 2.Qg6#
      • 1...Sg4
        • 2.Qg6#
      • 1...Sb4
        • 2.Sxg5#
      • 1...Sf4
        • 2.Sxg5#
      • 1...Sb6
        • 2.Sxg5#
      • 1...Sf6
        • 2.Sxg5#
      • 1...Sc7
        • 2.Sxg5#
      • 1...Se7
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(b);SBLOCK::QAR2(F)
    • S(d);::QAR2(F)
    • S(g);P_PINQ(F)::S(G),XP(h)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAR2(F)
        • S(d);P_SPINS(d)::QAR2(F)
      • Refutation
        • S(g);P_PINQ(F),XR(D)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • K(e);P-FLIGHT,P_SPINS(d)::R(D)
      • S(d);N_GUARD::QAB(F)
      • S(g);P_PINQ(F)::S(G),XP(h)
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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).