MESON Chess Problem Database

Problem Display
PID: 28892 (8/1p1N1K2/2k5/1N6/8/1P6/Q7/8 w - - 0 1)

Braithwaite, Kenneth Holmes

Le Droit, 1979

8/1p1N1K2/2k5/1N6/8/1P6/Q7/8

#2

5 + 2

3248 Miniatures canadiennes 2000
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb5
      • 2.Qa4#
    • 1...Kd5
      • 2.Qg2#
  • Tries
    • 1.Ke6?
      • 1...Kxb5
        • 2.Qa4#
      • 1...b6!
    • 1.Ke7?
      • 1...Kxb5
        • 2.Qa4#
      • 1...Kd5
        • 2.Qg2#
      • 1...b6!
    • 1.Qc2+?
      • 1...Kd5
        • 2.Qg2#
        • 2.Qc4#
      • 1...Kxd7
        • 2.Qc7#
      • 1...Kxb5!
    • 1.Qe2?
      • 1...Kd5
        • 2.Qf3#
        • 2.Qc4#
        • 2.Qg2#
        • 2.Qe6#
      • 1...Kxd7
        • 2.Qe8#
      • 1...b6!
  • Keys
    • 1.Qa8!
      • 1...Kxb5
        • 2.Qa4#
      • 1...Kd5
        • 2.Qxb7#
      • 1...Kxd7
        • 2.Qe8#

Anticipated by 196580(1918), 80435(1962)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
    • K(a);S_FLIGHT::QAB(A)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(D)::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(A);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);P_PINP(b)
    • Vars
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • K(a);S_FLIGHT::QAB(A),XP(b)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(D)::QAB1(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).