MESON Chess Problem Database

Problem Display
PID: 48097 (4k3/4b2R/2K5/3nQ3/1p6/8/8/8 w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

4k3/4b2R/2K5/3nQ3/1p6/8/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kd8
      • 2.Qb8#
    • 1...Kf8
      • 2.Qh8#
    • 1...Sc3
      • 2.Qxe7#
    • 1...Se3
      • 2.Qxe7#
    • 1...Sf4
      • 2.Qxe7#
    • 1...Sb6
      • 2.Qxe7#
    • 1...Sf6
      • 2.Qxe7#
    • 1...Sc7
      • 2.Qxe7#
  • Tries
    • 1.Rxe7+?
      • 1...Kd8
        • 2.Re8#
      • 1...Kf8
        • 2.Qg7#
      • 1...Sxe7+!
    • 1.Qh5+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kd8!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Rh8#
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8
        • 2.Qf7#
      • 1...Sf6
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • K(d);N_SPINB(c),P-FLIGHT::QAR2(A)
    • S(b);N_GUARD::QAR1(A),XB(c)
  • Tries
    • Try
      • R(C);CHECK,XB(c)
      • Vars
        • K(d);P-FLIGHT::R1(C)
        • K(d);P-FLIGHT::QAB1(A)
      • Refutation
        • S(b);CHECK,P_SPINS(b),XR(C)
    • Try
      • Q(A);CHECK,N_PINB(c)
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • R(C)
    • Vars
      • K(d);N_SPINB(c),P-FLIGHT::QAR1(A)
      • S(b);N_GUARD::QAR1(A),XB(c)
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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).