MESON Chess Problem Database

Problem Display
PID: 10021 (4R3/2Qp2B1/3nbp1N/1PNk4/1Kp2nR1/2Prp3/8/1B6 w - - 0 1)

Leibovici, Paul

Problem (Zagreb), 1961

4R3/2Qp2B1/3nbp1N/1PNk4/1Kp2nR1/2Prp3/8/1B6

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Rg5#
  • Tries
    • 1.Qc6+?
      • 1...Ke5
        • 2.Sxd7#
      • 1...dxc6!
    • 1.Qb7+?
      • 1...Ke5
        • 2.Sxd7#
      • 1...Sxb7!
  • Keys
    • 1.Sxd7!
      • threat
        • 2.Qc6#
      • 1...Ke4
        • 2.Qc6#
      • 1...Rxc3
        • 2.Qc5#
      • 1...Bxd7
        • 2.Qc5#
      • 1...Sxb5
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(e);P-FLIGHT,P_SPINB(g),P_SPINP(h),P_SPINS(f)::R(D)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINB(g),P_SPINP(h)::S(F),XP(i)
      • Refutation
        • P(i);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINB(g),P_SPINP(h)::S(F),XP(i)
      • Refutation
        • S(f);XQ(H)
  • Actual
    • S(F);XP(i)
    • Threat
      • QAB1(H)
    • Vars
      • K(e);P_SPINB(g),P_SPINR(a),P_SPINS(d),S_FLIGHT::QAB(H)
      • R(a);XP(B)::QAR1(H)
      • B(g);XS(F)::QAR1(H)
      • S(f);XP(E)::S(F),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).