MESON Chess Problem Database

Problem Display
PID: 47724 (8/8/8/8/8/3PN3/5K1p/3Q2nk w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

8/8/8/8/8/3PN3/5K1p/3Q2nk

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qh5?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Se2
        • 2.Qf3#
        • 2.Qd5#
      • 1...Sh3+!
  • Keys
    • 1.Kf1!
      • 1...Se2
        • 2.Kxe2#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sh3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);N_PINS(a),P_PINP(c)
      • Vars
        • S(a);N_GUARD::QAB(A),XS(a)
      • Refutation
        • S(a);CHECK,N_SPINP(c)
  • Actual
    • K(B);N_PINS(a),P-FLIGHT
    • Vars
      • S(a);::QAR(A)+K(B),XS(a)
      • S(a);N_GUARD::QAB(A),XS(a)
      • S(a);N_GUARD::QAB(A)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).