MESON Chess Problem Database

Problem Display
PID: 23872 (8/K7/2p5/pk6/2p5/8/2N5/Q7 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/K7/2p5/pk6/2p5/8/2N5/Q7

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qe5#
  • Tries
    • 1.Qb2+?
      • 1...Kc5
        • 2.Qe5#
      • 1...Ka4!
    • 1.Qc3?
      • 1...Ka4
        • 2.Qxc4#
      • 1...Kc5
        • 2.Qe5#
      • 1...a4
        • 2.Qb4#
      • 1...c5!
    • 1.Qe5+?
      • 1...c5
        • 2.Qe8#
      • 1...Ka4!
  • Keys
    • 1.Qd4!
      • 1...Ka4
        • 2.Qxc4#
      • 1...c5
        • 2.Qd7#
      • 1...c3
        • 2.Sa3#
      • 1...a4
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(c);S_FLIGHT::QAR2(A),XP(a)
        • K(c);P-FLIGHT,P_SPINP(a)::QAR2(A)
        • P(b);N_GUARD::QAR1(A)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK
      • Vars
        • P(d);OGATEB,P_SPINP(d),SBLOCK::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);P_SPINP(a),S_FLIGHT::QAR2(A),XP(a)
      • P(d);OGATEB,SBLOCK::QAB(A)
      • P(a);::S(B)
      • P(b);SBLOCK::QAR1(A)
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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).