MESON Chess Problem Database

Problem Display
PID: 234779 (k7/1pK5/2N5/n7/8/8/4b3/4Q3 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2016

k7/1pK5/2N5/n7/8/8/4b3/4Q3

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qxa5#
      • 2.Qe8#
    • 1...Bf1
      • 2.Qe8#
    • 1...Bd3
      • 2.Qe8#
    • 1...Bf3
      • 2.Qxa5#
      • 2.Qe8#
    • 1...Bc4
      • 2.Qe8#
    • 1...Bg4
      • 2.Qxa5#
    • 1...Bb5
      • 2.Qe8#
    • 1...Bh5
      • 2.Qxa5#
    • 1...Ba6
      • 2.Qe8#
    • 1...b5
      • 2.Qxa5#
  • Tries
    • 1.Qxe2?
      • threat
        • 2.Qe8#
      • 1...bxc6
        • 2.Qa6#
      • 1...Sxc6!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qf8#
      • 1...Sxc6
        • 2.Qxb7#
      • 1...bxc6
        • 2.Qb8#
      • 1...Bg4
        • 2.Qxa5#
      • 1...Bh5
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(a);OGATE::QAR(A)
    • B(a);N_GUARD::QAR(A),XS(b)
    • P(c);S_CUTB(a)::QAR(A),XS(b)
  • Tries
    • Try
      • Q(A);XB(a)
      • Threat
        • QAR(A)
      • Vars
        • P(c);N_GUARD,XS(B)::QAR2(A)
      • Refutation
        • S(b);XS(B)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • S(b);N_GUARD,XS(B)::QAB1(A),XP(c)
      • P(c);OGATE,XS(B)::QAR1(A)
      • B(a);N_GUARD::QAR(A),XS(b)
HTML5 logo

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).