MESON Chess Problem Database

Problem Display
PID: 175290 (5rbQ/1P1p3p/1K1k1P2/3P3B/2PrpP1b/8/3N4/8 w - - 0 1)

Coppens, JP

Brisbane Courier, 1920

5rbQ/1P1p3p/1K1k1P2/3P3B/2PrpP1b/8/3N4/8

#2

9 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Sxe4#
    • 1...Rf7
      • 2.b8Q#
      • 2.b8B#
    • 1...Rc8
      • 2.bxc8S#
    • 1...Be6
      • 2.Qxf8#
    • 1...Bf7
      • 2.Qxf8#
  • Keys
    • 1.Bf7!
      • threat
        • 2.c5#
      • 1...Rxc4
        • 2.Sxc4#
      • 1...Rxd5
        • 2.Sxe4#
      • 1...Rxf7
        • 2.b8Q#
        • 2.b8B#
      • 1...Bxf6
        • 2.Qxf6#
      • 1...Bxf7
        • 2.Qxf8#
      • 1...Rc8
        • 2.bxc8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::S(A),XP(b)
    • R(g);N_GUARD::P=Q
    • R(g);OGATE::PXR(g)=S
    • B(h);OGATE::QAB(I),XR(g)
  • Actual
    • B(E);
    • Threat
      • P(B)
    • Vars
      • R(a);XP(B)::S(A),XR(a)
      • R(a);N_GUARD,XP(D)::S(A),XP(b)
      • R(g);N_GUARD,XB(E)::P=Q
      • B(c);OGATE,XP(G)::QAR2(I),XB(c)
      • B(h);OGATE,XB(E)::QAB(I),XR(g)
      • R(g);OGATE::PXR(g)=S
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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).