MESON Chess Problem Database

Problem Display
PID: 81051 (3R4/4p2B/5Ppb/4pP1N/4kPQK/5p2/5P2/5n2 w - - 0 1)

Rice, John Michael

1st Place, Torquay, 2008

3R4/4p2B/5Ppb/4pP1N/4kPQK/5p2/5P2/5n2

#2

9 + 7

56 The Problemist 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5+
      • 2.fxg5#
    • 1...Sd2
      • 2.Sg3#
    • 1...Sh2
      • 2.Sg3#
    • 1...Se3
      • 2.Sg3#
    • 1...Sg3
      • 2.Sxg3#
    • 1...gxf5
      • 2.Bxf5#
      • 2.Qxf5#
    • 1...g5+
      • 2.fxg5#
    • 1...exf6
      • 2.Sxf6#
  • Tries
    • 1.fxe5+?
      • 1...Bf4
        • 2.Qxf4#
      • 1...Kxe5!
    • 1.fxe7?
      • threat
        • 2.Sf6#
      • 1...Bg5+
        • 2.fxg5#
      • 1...g5+
        • 2.fxg5#
      • 1...exf4
        • 2.e8Q#
        • 2.e8R#
      • 1...gxh5
        • 2.f6#
      • 1...Bg7!
  • Keys
    • 1.fxg6!
      • threat
        • 2.g7#
      • 1...Bg5+
        • 2.fxg5#
      • 1...exf4
        • 2.Qe6#
      • 1...exf6
        • 2.Sxf6#
      • 1...Bg7
        • 2.f5#
      • 1...Se3
        • 2.Sg3#
      • 1...Sg3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(f);CHECK,OGATE::QAR(C)+P(B),XB(f)
    • S(a);N_GUARD::S(F)
    • S(a);N_GUARD::S(F),XS(a)
    • P(e);CHECK,OGATE::QAR(C)+P(B),XP(e)
    • P(g);XP(G)::S(F),XP(g)
  • Tries
    • Try
      • P(B);CHECK,XP(d)
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR1(C),XB(f)
      • Refutation
        • K(c);P-FLIGHT,XP(B)
    • Try
      • P(G);XP(g)
      • Threat
        • S(F)
      • Vars
        • B(f);CHECK,OGATE::QAR(C)+P(B),XB(f)
        • P(e);CHECK,OGATE::QAR(C)+P(B),XP(e)
        • P(d);P_SPINP(d),XP(B)::P=Q
        • P(e);XS(F)::B(H)+P(E)
      • Refutation
        • B(f);
  • Actual
    • P(E);XP(e)
    • Threat
      • B(H)+P(E)
    • Vars
      • B(f);CHECK,OGATE::QAR(C)+P(B),XB(f)
      • P(d);OGATEB,P_SPINP(d),XP(B)::QAR2(C)
      • P(g);XP(G)::S(F),XP(g)
      • B(f);N_GUARD::QAR(C)+P(B)
      • S(a);N_GUARD::S(F)
      • S(a);N_GUARD::S(F),XS(a)
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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).