MESON Chess Problem Database

Problem Display
PID: 108059 (5R2/2n2K2/7Q/4p1qp/2R1PkNB/1p5n/2B4N/8 w - - 0 1)

Filkington, RA

Vancouver Province, 1955

5R2/2n2K2/7Q/4p1qp/2R1PkNB/1p5n/2B4N/8

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Qxg5#
    • 1...Sf2
      • 2.Qxg5#
    • 1...Sb5
      • 2.Ke6#
      • 2.Ke8#
    • 1...Sa6
      • 2.Ke6#
      • 2.Ke8#
    • 1...Se6
      • 2.Kxe6#
    • 1...Sa8
      • 2.Ke6#
      • 2.Ke8#
    • 1...Se8
      • 2.Kxe8#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Bg3#
        • 2.Rf3#
      • 1...Qxh6
        • 2.Rf3#
      • 1...hxg4
        • 2.Bg3#
      • 1...Sg1
        • 2.Bg3#
        • 2.Bxg5#
        • 2.Qxg5#
      • 1...bxc2!
    • 1.Qf6+?
      • 1...Qf5
        • 2.Qxf5#
      • 1...Qxf6+!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qd2#
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Qe7+
        • 2.Kxe7#
      • 1...Qf5+
        • 2.exf5#
      • 1...Qg6+
        • 2.Kxg6#
      • 1...Qg7+
        • 2.Kxg7#
      • 1...Qg8+
        • 2.Kxg8#
      • 1...Qxh4
        • 2.Qxe5#
      • 1...Qd8
        • 2.Qxe5#
      • 1...Sd5
        • 2.exd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::QAB1(G),XQ(e)
    • S(g);::R(I)+K(H),XS(g)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);N_SPINQ(e),XQ(G)::R1(C)
        • P(f);XS(E)::B(F)
      • Refutation
        • P(a);XB(A)
    • Try
      • Q(G);CHECK,N_PINQ(e)
      • Vars
        • Q(e);N_GUARD,P_PINQ(G),P_SPINQ(e)::QAR1(G),XQ(e)
      • Refutation
        • Q(e);CHECK,XQ(G)
  • Actual
    • Q(G);N_PINQ(e),P_PINP(d)
    • Threat
      • QAB(G)
    • Vars
      • Q(e);CHECK,N_GUARD::QAR2(G),XQ(e)
      • Q(e);CHECK::R(I)+K(H),XQ(e)
      • Q(e);CHECK,OGATE::R(C)+P(D),XQ(e)
      • Q(e);N_GUARD,XB(F)::QAB1(G),XP(d)
      • Q(e);N_GUARD::QAB1(G),XP(d)
      • S(g);OGATE::R(C)+P(D),XS(g)
HTML5 logo

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).