MESON Chess Problem Database

Problem Display
PID: 108374 (NK1bR3/3B4/bp2rp1Q/3k2p1/5n2/B2P1N2/2P5/8 w - - 0 1)

Hall, James S

Vancouver Province, 1952

NK1bR3/3B4/bp2rp1Q/3k2p1/5n2/B2P1N2/2P5/8

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb7
      • 2.c4#
    • 1...Bc8
      • 2.c4#
    • 1...Bc7+
      • 2.Sxc7#
    • 1...Be7
      • 2.Sc7#
  • Tries
    • 1.Bxe6+?
      • 1...Kc6
        • 2.Sd4#
      • 1...Sxe6!
  • Keys
    • 1.Qxf6!
      • threat
        • 2.Qd4#
      • 1...Bc7+
        • 2.Sxc7#
      • 1...Rxf6
        • 2.Re5#
      • 1...Bxf6
        • 2.Sc7#
      • 1...Re4
        • 2.Bc6#
        • 2.Qc6#
        • 2.Qd6#
      • 1...Re5
        • 2.Bc6#
        • 2.Rxe5#
        • 2.Qxe5#
        • 2.Qc6#
        • 2.Qd6#
      • 1...Se2
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(d);N_GUARD::P(A)
    • B(h);CHECK,N_GUARD::S(G),XB(h)
    • B(h);N_GUARD::S(G)
  • Tries
    • Try
      • B(F);CHECK,XR(f)
      • Vars
        • K(b);S_FLIGHT::S(D)
      • Refutation
        • S(a);XB(F)
  • Actual
    • Q(E);XP(g)
    • Threat
      • QAR1(E)
    • Vars
      • B(h);CHECK,N_GUARD::S(G),XB(h)
      • R(f);OGATE,XQ(E)::R1(I)
      • B(h);N_GUARD,XQ(E)::S(G)
      • S(a);N_GUARD::QAB1(E),XR(f)
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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).