MESON Chess Problem Database

Problem Display
PID: 23074 (k1K5/p7/8/8/QB1n4/8/7p/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

k1K5/p7/8/8/QB1n4/8/7p/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qc6#
    • 1...Se2
      • 2.Qc6#
    • 1...Sb3
      • 2.Qc6#
    • 1...Sf3
      • 2.Qc6#
    • 1...Sf5
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Se6
      • 2.Qc6#
    • 1...a5
      • 2.Qxa5#
    • 1...a6
      • 2.Qxa6#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Qb7#
        • 2.Qb8#
      • 1...h1Q
        • 2.Qb8#
      • 1...h1B
        • 2.Qb8#
      • 1...Sc6
        • 2.Qxc6#
        • 2.Qb7#
      • 1...Sxb5!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Qxa7#
      • 1...Sb5
        • 2.Qe4#
      • 1...Sc6
        • 2.Qxc6#
      • 1...a5
        • 2.Qxa5#
      • 1...a6
        • 2.Qxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • S(b);N_GUARD::QAB(A)
    • S(b);N_GUARD::QAB(A),XS(b)
    • P(c);OGATEB::QAR(A),XP(c)
    • P(c);OGATEB::QAR2(A),XP(c)
  • Tries
    • Try
      • Q(A);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR1(A)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • B(B);
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • S(b);OGATE::QAB(A)
      • S(b);N_GUARD::QAB(A),XS(b)
      • P(c);OGATEB::QAR(A),XP(c)
      • P(c);OGATEB::QAR2(A),XP(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).