MESON Chess Problem Database

Problem Display
PID: 24115 (4K3/1QpBn3/5p2/1N1nkpRN/4p3/8/b3R3/q1b1r1B1 w - - 0 1)

Chlubna, Friedrich

Die Sphinx, 1962

4K3/1QpBn3/5p2/1N1nkpRN/4p3/8/b3R3/q1b1r1B1

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Bxd4#
    • 1...Qb1
      • 2.Bd4#
    • 1...Sc3
      • 2.Bd4#
    • 1...Se3
      • 2.Bh2#
    • 1...Sb4
      • 2.Qxe4#
    • 1...Sf4
      • 2.Qxe4#
    • 1...Sb6
      • 2.Qxe4#
    • 1...Sc6
      • 2.Rxf5#
    • 1...Sg6
      • 2.Rxf5#
    • 1...Sc8
      • 2.Rxf5#
    • 1...Sg8
      • 2.Rxf5#
  • Tries
    • 1.Bh2+?
      • 1...Sf4
        • 2.Qxe4#
      • 1...Bf4!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qe6#
      • 1...Sxc6
        • 2.Rxf5#
      • 1...Sc3
        • 2.Bd4#
      • 1...Se3
        • 2.Bh2#
      • 1...Sb4
        • 2.Qxe4#
      • 1...Sf4
        • 2.Qxe4#
      • 1...Sb6
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::B(A),XQ(a)
    • Q(a);N_GUARD::B(A)
    • S(f);S_CUTQ(a)::B(A)
    • S(f);N_GUARD,N_SPINP(e),P_SPINP(h),S_CUTB(b)::B(A)
    • S(f);OGATE::QAR1(F),XP(e)
    • S(k);N_GUARD::R1(D),XP(h)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • S(f);OGATE,P_SPINS(f)::QAR1(F),XP(e)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • S(k);N_GUARD,XQ(F)::R1(D),XP(h)
      • S(f);S_CUTQ(a)::B(A)
      • S(f);N_GUARD,N_SPINP(e),P_SPINP(h),S_CUTB(b)::B(A)
      • S(f);OGATE::QAR1(F),XP(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).