MESON Chess Problem Database

Problem Display
PID: 58866 (q4kNK/3P4/3p2P1/rB2p3/8/Q2r1b2/8/8 w - - 0 1)

Muller, WC Jr

5th Comm., Brisbane Courier, 1921

q4kNK/3P4/3p2P1/rB2p3/8/Q2r1b2/8/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.d8Q#
      • 2.d8R#
    • 1...Qd5
      • 2.d8Q#
      • 2.d8R#
    • 1...Qb7
      • 2.d8Q#
      • 2.d8R#
    • 1...Qa6
      • 2.d8Q#
      • 2.d8R#
    • 1...Qa7
      • 2.d8Q#
      • 2.d8R#
    • 1...Qc8
      • 2.dxc8Q#
      • 2.dxc8R#
    • 1...Qe8
      • 2.dxe8Q#
      • 2.dxe8R#
    • 1...Rb3
      • 2.Qxd6#
    • 1...Rc3
      • 2.Qxd6#
    • 1...Re3
      • 2.Qxd6#
    • 1...Rd5
      • 2.Qxf3#
    • 1...Bd5
      • 2.Qxd6#
  • Keys
    • 1.Bc4!
      • threat
        • 2.g7#
      • 1...Qd5
        • 2.d8Q#
        • 2.d8R#
      • 1...Rdd5
        • 2.Qxf3#
      • 1...Rad5
        • 2.Qxa8#
      • 1...Bd5
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(f);N_GUARD::P=Q
    • Q(f);OGATE::PXQ(f)=Q
    • R(a);N_GUARD::QAB(A),XP(e)
    • R(a);OGATE::QAR(A),XB(b)
    • B(b);S_CUTR(a)::QAB(A),XP(e)
  • Actual
    • B(B);
    • Threat
      • P(C)
    • Vars
      • Q(f);N_GUARD::P=Q
      • R(a);OGATE::QAR(A),XB(b)
      • R(c);OGATE::QAR(A),XQ(f)
      • B(b);S_CUTR(a)::QAB(A),XP(e)
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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).