MESON Chess Problem Database

Problem Display
PID: 72583 (2K5/2B5/Q5P1/R1q3k1/8/4N2R/1bB3P1/8 w - - 0 1)

van Grieken, JL

Tijdschrift vd KNSB, 1936

2K5/2B5/Q5P1/R1q3k1/8/4N2R/1bB3P1/8

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5+
      • 2.Rxf5#
    • 1...Bc1
      • 2.Rxc5#
  • Tries
    • 1.g7?
      • threat
        • 2.Qg6#
        • 2.Qh6#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Bxg7
        • 2.Qg6#
      • 1...Qe5
        • 2.Qh6#
      • 1...Be5
        • 2.Qh6#
      • 1...Bf6!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qf4#
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Qe5
        • 2.Bd8#
      • 1...Be5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);CHECK,N_PINB(H),OGATE::R1(E),XQ(b)
    • B(a);N_GUARD::R(E),XQ(b)
  • Tries
    • Try
      • P(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,N_PINB(H),OGATE::R1(E),XQ(b)
        • B(a);XP(G)::QAR1(F)
        • Q(b);N_PINB(H)::QAB1(F)
        • B(a);N_SPINQ(b)::QAB1(F)
      • Refutation
        • B(a);
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • Q(b);CHECK,N_GUARD,N_PINB(H)::QAR1(F),XQ(b)
      • Q(b);N_PINB(H)::B(H)
      • B(a);N_SPINQ(b),S_CUTQ(b)::QAR1(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).