MESON Chess Problem Database

Problem Display
PID: 23087 (k1KB3Q/p7/8/8/7n/3n4/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

k1KB3Q/p7/8/8/7n/3n4/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Qh1#
    • 1...Sg6
      • 2.Qh1#
  • Tries
    • 1.Ba5?
      • threat
        • 2.Kc7#
      • 1...Sg6
        • 2.Qh1#
      • 1...a6!
    • 1.Qe5?
      • threat
        • 2.Qb8#
        • 2.Qe4#
        • 2.Qd5#
      • 1...a5
        • 2.Qb8#
        • 2.Qxa5#
      • 1...a6
        • 2.Qb8#
      • 1...Sb4
        • 2.Qb8#
      • 1...Sf2
        • 2.Qb8#
        • 2.Qd5#
      • 1...Sf4
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sxe5!
    • 1.Qh7?
      • threat
        • 2.Qe4#
        • 2.Qb7#
      • 1...Sb4
        • 2.Qb7#
      • 1...Sf2
        • 2.Qb7#
      • 1...Sf4
        • 2.Qb7#
      • 1...Se5
        • 2.Qb7#
      • 1...Sf5
        • 2.Qh1#
        • 2.Qb7#
      • 1...Sg6
        • 2.Qh1#
        • 2.Qb7#
      • 1...a5
        • 2.Qb7#
      • 1...a6
        • 2.Qb7#
      • 1...Sc5!
  • Keys
    • 1.Bb6!
      • threat
        • 2.Kc7#
      • 1...axb6
        • 2.Qa1#
      • 1...Sg6
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(b);OGATE::QAB(C)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR(C)+K(A)
      • Vars
        • S(b);OGATE::QAB(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);::QAR1(C)
        • S(a);::QAR1(C)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB1(C)
        • P(c);::QAB1(C)
      • Refutation
        • S(a);
  • Actual
    • B(B);
    • Threat
      • QAR(C)+K(A)
    • Vars
      • P(c);OGATEB,XB(B)::QAB(C)
      • S(b);OGATE::QAB(C)
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).