MESON Chess Problem Database

Problem Display
PID: 23055 (8/p7/5Q2/Pk6/1P6/1K2n3/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/p7/5Q2/Pk6/1P6/1K2n3/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...a6
      • 2.Qb6#
  • Tries
    • 1.Qe6?
      • 1...Sd1
        • 2.Qc4#
      • 1...Sf1
        • 2.Qc4#
      • 1...Sc2
        • 2.Qc4#
      • 1...Sg2
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sg4
        • 2.Qc4#
      • 1...Sf5
        • 2.Qc4#
      • 1...a6
        • 2.Qd7#
        • 2.Qb6#
        • 2.Qe8#
      • 1...Sd5!
  • Keys
    • 1.Qc3!
      • 1...Ka6
        • 2.Qc6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sf1
        • 2.Qc4#
      • 1...Sc2
        • 2.Qc4#
      • 1...Sg2
        • 2.Qc4#
      • 1...Sg4
        • 2.Qc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Sf5
        • 2.Qc4#
      • 1...a6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAR1(D)
  • Tries
    • Try
      • Q(D);
      • Vars
        • S(a);N_GUARD::QAB1(D)
        • S(a);N_GUARD::QAB1(D),XS(a)
      • Refutation
        • S(a);
  • Actual
    • Q(D);
    • Vars
      • K(b);S_FLIGHT::QAR2(D)
      • S(a);N_GUARD::QAB1(D),XS(a)
      • S(a);N_GUARD::QAB1(D)
      • P(c);SBLOCK::QAR1(D)
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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).