MESON Chess Problem Database

Problem Display
PID: 166715 (kB6/2K1n3/8/P2b4/8/8/1Q6/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2016

kB6/2K1n3/8/P2b4/8/8/1Q6/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qb7#
    • 1...Bc4
      • 2.Qb7#
    • 1...Be6
      • 2.Qb7#
    • 1...Bb7
      • 2.Qxb7#
    • 1...Bf7
      • 2.Qb7#
    • 1...Bg8
      • 2.Qb7#
    • 1...Sc6
      • 2.Qb7#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qa7#
      • 1...Sc8
        • 2.Qxd5#
      • 1...Sc6!
    • 1.Qb6?
      • threat
        • 2.Qa7#
        • 2.Qa6#
      • 1...Bc4
        • 2.Qa7#
        • 2.Qb7#
      • 1...Bb7
        • 2.Qa7#
        • 2.Qxb7#
      • 1...Sc6
        • 2.Qb7#
      • 1...Sc8!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qa6#
      • 1...Bc4
        • 2.Qb7#
      • 1...Bb7
        • 2.Qxb7#
      • 1...Sc6
        • 2.Qb7#
      • 1...Sc8
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAB1(A)
    • B(a);N_GUARD::QAB1(A),XB(a)
    • S(b);S_CUTB(a)::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(b);N_GUARD::QAB(A),XB(a)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);S_CUTB(a)::QAB1(A)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • B(a);N_GUARD::QAB1(A)
      • B(a);N_GUARD::QAB1(A),XB(a)
      • S(b);S_CUTB(a)::QAB1(A)
      • S(b);N_GUARD::QAB(A),XB(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).