MESON Chess Problem Database

Problem Display
PID: 30915 (Q6b/1B6/p3p3/1Nq1k3/3R4/6Pp/2b2K2/B7 w - - 0 1)

Dubuisson, Alfred

La Strategie, 1867

Q6b/1B6/p3p3/1Nq1k3/3R4/6Pp/2b2K2/B7

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qe7
      • 2.Rf4#
    • 1...Qf8+
      • 2.Rf4#
    • 1...Bf5
      • 2.Qxh8#
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qf4#
      • 1...Qxd4+
        • 2.Bxd4#
      • 1...Qxf8+
        • 2.Rf4#
      • 1...Bf6
        • 2.Qxc5#
      • 1...Bf5
        • 2.Qxh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_PINR(D)::B(A)+R(D)
    • Q(c);CHECK,N_PINR(D)::B(A)+R(D)
    • B(a);SBLOCK::QAB(G),XB(g)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XR(D)::B(A),XQ(c)
      • Q(c);CHECK,N_PINR(D),XQ(G)::B(A)+R(D)
      • B(g);SBLOCK::QAR2(G),XQ(c)
      • B(a);SBLOCK::QAB(G),XB(g)
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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).