MESON Chess Problem Database

Problem Display
PID: 2376 (3Q4/8/8/4kpp1/3p1RP1/1bP5/2p4K/7B w - - 0 1)

Greenshields, EB

Source?, 0000

3Q4/8/8/4kpp1/3p1RP1/1bP5/2p4K/7B

#2

6 + 6

4774 Canadian Chess Problems 1890

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf4
      • 2.Qxd4#
    • 1...Be6
      • 2.Qxd4#
    • 1...fxg4
      • 2.Qf6#
  • Tries
    • 1.Qf6+?
      • 1...Kxf4
        • 2.Qxd4#
      • 1...Kxf6!
    • 1.Qe7+?
      • 1...Be6
        • 2.Rxf5#
      • 1...Kxf4!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Rxf5#
      • 1...Kxf4
        • 2.Qxd4#
      • 1...fxg4
        • 2.Qf6#
      • 1...gxf4
        • 2.cxd4#
      • 1...Be6
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT,XR(D)::QAR2(F),XP(c)
    • B(b);SBLOCK::QAB1(F),XP(c)
    • P(e);XP(E)::QAB1(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);OGATE,P_SPINP(e),S_FLIGHT,XR(D)::QAR2(F),XP(c)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • B(b);P_SPINB(b)::R1(D),XP(e)
      • Refutation
        • K(d);S_FLIGHT,XR(D)
  • Actual
    • Q(F);
    • Threat
      • R1(D),XP(e)
    • Vars
      • K(d);S_FLIGHT,XR(D)::QAR2(F),XP(c)
      • P(e);XP(E)::QAB1(F)
      • P(f);SBLOCK,XR(D)::P(C),XP(c)
      • B(b);SBLOCK::QAB1(F),XP(c)
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).