MESON Chess Problem Database

Problem Display
PID: 3045 (5K2/8/8/4p2p/3ppk2/1Q2R3/6R1/3n4 w - - 0 1)

Leopold, Dr Rudolf L

Source?, 1917

5K2/8/8/4p2p/3ppk2/1Q2R3/6R1/3n4

#2

4 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qf7#
    • 1...dxe3
      • 2.Qf7#
  • Tries
    • 1.Ree2?
      • threat
        • 2.Qf7#
      • 1...Kf5
        • 2.Qf7#
      • 1...Se3
        • 2.Ref2#
      • 1...e3!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg5#
      • 1...Kxe3
        • 2.Qg3#
      • 1...Kf5
        • 2.Qf7#
      • 1...Sxe3
        • 2.Rf2#
      • 1...dxe3
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);P-FLIGHT::QAR2(B)
    • P(b);SBLOCK,XR(C)::QAR(B)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAR(B)
      • Vars
        • K(d);P-FLIGHT::QAR2(B)
        • S(a);N_GUARD::R(C)
      • Refutation
        • P(c);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(d);S_FLIGHT,XR(C)::QAR2(B)
      • K(d);P-FLIGHT::QAR2(B)
      • S(a);N_GUARD,SBLOCK,XR(C)::R(A)
      • P(b);SBLOCK,XR(C)::QAR(B)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).