MESON Chess Problem Database

Problem Display
PID: 71754 (3k1N1K/3nb1N1/BP6/8/8/4Q3/b7/8 w - - 0 1)

Blake, CS

Chess, 1952

3k1N1K/3nb1N1/BP6/8/8/4Q3/b7/8

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Sfe6#
    • 1...Be6
      • 2.Sfxe6#
    • 1...Ba3
      • 2.Qe8#
    • 1...Bb4
      • 2.Qe8#
    • 1...Bh4
      • 2.Qe8#
    • 1...Bc5
      • 2.Qe8#
    • 1...Bg5
      • 2.Qe8#
    • 1...Bd6
      • 2.Qe8#
    • 1...Bf6
      • 2.Qe8#
    • 1...Bxf8
      • 2.Qe8#
    • 1...Sxb6
      • 2.Qxb6#
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qxd7#
      • 1...Bxe6
        • 2.Sfxe6#
      • 1...Bxf8
        • 2.Qe8#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf8
        • 2.Qc8#
      • 1...Sc5
        • 2.Qc8#
      • 1...Se5
        • 2.Qc8#
      • 1...Sf6
        • 2.Qc8#
      • 1...Sb8
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • B(a);N_GUARD::S(E)
    • B(a);N_GUARD::S(E),XB(a)
    • B(c);OGATE::QAR1(A)
    • B(c);OGATE,P_PINS(D)::QAR1(A)
    • B(c);OGATE,XS(E)::QAR1(A)
    • S(b);OGATE,XP(C)::QAB(A),XS(b)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XS(b)
    • Vars
      • B(a);XQ(A)::S(E),XB(a)
      • B(c);OGATE,XS(E)::QAR1(A)
      • S(b);OGATE,XP(C)::QAB(A),XS(b)
      • S(b);OGATE,XS(E)::QAR1(A)
      • S(b);OGATE::QAR1(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).