MESON Chess Problem Database

Problem Display
PID: 42535 (6K1/3p1Q2/2bP2R1/2n4p/2prk1pP/3p1pB1/5p2/2bN4 w - - 0 1)

Shire, David J

3rd Prize, Problem Observer, 2001

6K1/3p1Q2/2bP2R1/2n4p/2prk1pP/3p1pB1/5p2/2bN4

#2

7 + 12

136 Problem Observer 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Sc3#
  • Tries
    • 1.Qf4+?
      • 1...Kd5
        • 2.Sc3#
        • 2.Qe5#
        • 2.Qf5#
      • 1...Bxf4!
    • 1.Qe7+?
      • 1...Kd5
        • 2.Sc3#
        • 2.Qe5#
      • 1...Kf5
        • 2.Rf6#
      • 1...Se6!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Rg5#
      • 1...Bd5+
        • 2.Re6#
      • 1...Kd5
        • 2.Sc3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Rxd6
        • 2.Rxd6#
      • 1...Rd5
        • 2.Rxg4#
      • 1...Bg5
        • 2.Rxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::S(A)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • B(a);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(g);S_FLIGHT::R1(E)
      • Refutation
        • S(i);P_SPINS(i)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+R(E)
    • Vars
      • B(k);CHECK,SBLOCK::QAB(F)+R(E),DCHECK
      • K(g);S_FLIGHT::S(A)
      • K(g);S_FLIGHT::QAB(F)+R(E)
      • R(f);OGATE,XP(D)::QAB(F)+R(E),XR(f)
      • R(f);SBLOCK::QAB(F)+R(E),DCHECK,XP(h)
      • B(a);::QAB(F)+R(E),XB(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).