MESON Chess Problem Database

Problem Display
PID: 23909 (1Q5n/7K/3n1B2/7k/6p1/8/8/8 w - - 0 1)

Lincoln, Robert A

diagrammes, 1997

1Q5n/7K/3n1B2/7k/6p1/8/8/8

#2

3 + 4

4883 Still More Fun with Chess Miniatures 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Qh2#
    • 1...Se4
      • 2.Qh2#
    • 1...Sb5
      • 2.Qh2#
      • 2.Qe5#
      • 2.Qxb5#
    • 1...Sb7
      • 2.Qh2#
      • 2.Qe5#
    • 1...Sdf7
      • 2.Qh2#
    • 1...Sc8
      • 2.Qh2#
      • 2.Qe5#
      • 2.Qb5#
    • 1...Se8
      • 2.Qh2#
      • 2.Qe5#
      • 2.Qb5#
  • Tries
    • 1.Qxd6?
      • threat
        • 2.Qh2#
        • 2.Qc5#
        • 2.Qe5#
        • 2.Qd5#
      • 1...g3
        • 2.Qd1#
      • 1...Sf7
        • 2.Qh2#
      • 1...Sg6!
    • 1.Qb5+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sxb5!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qh1#
      • 1...g3
        • 2.Qd1#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sg6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(c);OGATE::QAR(C)
  • Tries
    • Try
      • Q(C);XS(c)
      • Threat
        • DUALS(4)
      • Vars
        • P(a);OGATEB::QAB(C)
        • S(d);::QAR(C)
      • Refutation
        • S(d);
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR2(C),XS(c)
      • Refutation
        • S(c);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • P(a);OGATEB::QAB(C)
      • S(c);N_GUARD::QAR2(C),XS(c)
      • S(d);N_GUARD::QAB1(C),XS(d)
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).