MESON Chess Problem Database

Problem Display
PID: 260074 (8/1k6/2N1B3/KN6/8/7p/Q7/8 w - - 0 1)

Lincoln, Robert A

The Problemist, 1992

8/1k6/2N1B3/KN6/8/7p/Q7/8

#2

5 + 2

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qd5#
    • 1...Ka8
      • 2.Kb6#
  • Tries
    • 1.Bxh3?
      • 1...Ka8
        • 2.Kb6#
      • 1...Kxc6!
    • 1.Bd7?
      • 1...Ka8
        • 2.Kb6#
      • 1...h2!
    • 1.Bc8+?
      • 1...Kxc6
        • 2.Qc4#
      • 1...Ka8
        • 2.Kb4#
        • 2.Kb6#
        • 2.Sc7#
      • 1...Kxc8!
    • 1.Qb3?
      • 1...Kxc6
        • 2.Qd5#
      • 1...Ka8
        • 2.Sc7#
      • 1...h2!
    • 1.Qf2?
      • 1...Kxc6
        • 2.Qb6#
      • 1...Ka8
        • 2.Qa7#
      • 1...h2!
  • Keys
    • 1.Qh2!
      • 1...Kxc6
        • 2.Qc7#
      • 1...Ka8
        • 2.Qb8#

This is after

After Michael Lipton.

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(D)::QAB1(A)
    • K(b);S_FLIGHT::QAR(A)+K(B)
  • Tries
    • Try
      • B(E);XP(a)
      • Vars
        • K(b);S_FLIGHT::QAR(A)+K(B)
      • Refutation
        • K(b);S_FLIGHT,XS(D)
    • Try
      • B(E);
      • Vars
        • K(b);S_FLIGHT::QAR(A)+K(B)
      • Refutation
        • P(a);
    • Try
      • B(E);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT,XS(D)::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT,XB(E)
    • Try
      • Q(A);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(D)::QAB1(A)
        • K(b);N_GUARD,S_FLIGHT::S(C)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,S_FLIGHT,XS(D)::QAR1(A)
        • K(b);N_GUARD,S_FLIGHT::QAR1(A)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • K(b);N_GUARD,S_FLIGHT,XS(D)::QAR1(A)
      • K(b);N_GUARD,S_FLIGHT::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).