MESON Chess Problem Database

Problem Display
PID: 22342 (8/8/4b3/6K1/8/6pk/3NQ2P/8 w - - 0 1)

Lincoln, Robert A

More Fun with Chess Miniatures, 2000

8/8/4b3/6K1/8/6pk/3NQ2P/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...gxh2
      • 2.Qf3#
    • 1...g2
      • 2.Qh5#
  • Tries
    • 1.Qf1+?
      • 1...Kxh2
        • 2.Sf3#
      • 1...g2!
    • 1.Qf2?
      • threat
        • 2.Qxg3#
      • 1...gxh2
        • 2.Qf3#
      • 1...g2
        • 2.Qg3#
        • 2.Qh4#
      • 1...gxf2!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Sg1#
      • 1...gxh2
        • 2.Qxh2#
      • 1...g2
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB,SBLOCK,XP(C)::QAR2(B)
    • P(a);SBLOCK::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(C)::S(A)
      • Refutation
        • P(a);P_SPINP(a)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(a)
      • Vars
        • P(a);OGATEB,SBLOCK,XP(C)::QAR2(B)
      • Refutation
        • P(a);XQ(B)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • P(a);OGATE,XP(C)::QAR1(B),XP(a)
      • P(a);SBLOCK::QAB(B),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).