MESON Chess Problem Database

Problem Display
PID: 34795 (8/1B6/r1q5/r2n1Rp1/Q1N1k1P1/8/1P4Nn/1bKR4 w - - 0 1)

Zilahi, Zoltan

De Problemist, 1929

8/1B6/r1q5/r2n1Rp1/Q1N1k1P1/8/1P4Nn/1bKR4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Sd6#
    • 1...Qxb7
      • 2.Sd6#
    • 1...Qd7
      • 2.Sd6#
    • 1...Qe8
      • 2.Sd6#
    • 1...Qxc4+
      • 2.Qxc4#
    • 1...Qb6
      • 2.Sd6#
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qe6
      • 2.Sxa5#
      • 2.Sd6#
    • 1...Qf6
      • 2.Sd6#
    • 1...Qg6
      • 2.Sxa5#
      • 2.Sd6#
    • 1...Qh6
      • 2.Sxa5#
      • 2.Sd6#
    • 1...Ba2
      • 2.Qc2#
    • 1...Bc2
      • 2.Sd6#
      • 2.Qxc2#
    • 1...Sc3
      • 2.Sd6#
  • Keys
    • 1.Qb3!
      • threat
        • 2.Re5#
      • 1...Qxc4+
        • 2.Qxc4#
      • 1...Sxg4
        • 2.Qf3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Qe8
        • 2.Qe3#
      • 1...Qd6
        • 2.Qe3#
      • 1...Qe6
        • 2.Qe3#
      • 1...Qf6
        • 2.Qe3#
      • 1...Qc7
        • 2.Qe3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sc3
        • 2.Sd6#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sf4
        • 2.Qe3#
      • 1...Sb6
        • 2.Qe3#
      • 1...Sf6
        • 2.Qe3#
      • 1...Sc7
        • 2.Qe3#
      • 1...Se7
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 12
    • REMOVED MATES = 5
  • Sets
    • Q(h);N_PINS(F),P_SPINS(e)::QAR(E)+S(F),DCHECK
    • Q(h);N_PINS(F),XB(I)::QAR(E)+S(F),DCHECK
    • Q(h);CHECK,OGATE,P_SPINQ(h),P_SPINS(e),XS(F)::QAR2(E),XQ(h)
    • Q(h);N_PINS(F),P_SPINS(e)::QAR(E)+S(F),DCHECK,XQ(h)
    • B(a);N_GUARD::QAB(E)
    • S(e);N_PINS(F),P_SPINQ(h)::QAR(E)+S(F),DCHECK
  • Actual
    • Q(E);
    • Threat
      • R1(H)
    • Vars
      • Q(h);CHECK,OGATE,P_SPINS(e),XS(F)::QAR2(E),XQ(h)
      • S(b);N_GUARD,XP(G)::QAB1(E)
      • B(a);N_GUARD::QAB1(E),XB(a)
      • Q(h);N_PINS(F),P_SPINS(e)::QAR1(E)
      • Q(h);P_SPINS(e)::QAR1(E)
      • S(b);N_GUARD::QAB1(E),XS(b)
      • S(e);N_PINS(F),P_SPINQ(h)::S(F)
      • S(e);N_GUARD,P_SPINQ(h)::QAR1(E),XS(e)
      • S(e);N_GUARD,P_SPINQ(h)::QAR1(E)
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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).