MESON Chess Problem Database

Problem Display
PID: 177435 (8/8/5qRr/1RPPkp1N/1B1p4/pQ3K2/8/8 w - - 0 1)

Lider, Valentin Viktorovich

Probleemblad, 1978

8/8/5qRr/1RPPkp1N/1B1p4/pQ3K2/8/8

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Bc3#
  • Tries
    • 1.d6?
      • threat
        • 2.c6#
      • 1...Qxd6
        • 2.cxd6#
      • 1...d3
        • 2.Bc3#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Qf7!
  • Keys
    • 1.c6!
      • threat
        • 2.d6#
      • 1...Qxc6
        • 2.dxc6#
      • 1...d3
        • 2.Qc3#
      • 1...Qd6
        • 2.Bxd6#
      • 1...Qe6
        • 2.dxe6#
      • 1...Qf7
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::B(C)
  • Tries
    • Try
      • P(F);
      • Threat
        • R(D)+P(E)
      • Vars
        • Q(e);OGATE,XP(F)::R(D)+P(E),XQ(e)
        • P(b);OGATEB::B(C)
        • Q(e);N_GUARD::QAR1(A),XQ(e)
      • Refutation
        • Q(e);
  • Actual
    • P(E);
    • Threat
      • R(D)+P(F)
    • Vars
      • Q(e);OGATE,P_PINP(F),XP(E)::R(D)+P(F),XQ(e)
      • P(b);OGATEB::QAB(A)
      • Q(e);N_GUARD::B(C),XQ(e)
      • Q(e);OGATE::R(D)+P(F),XQ(e)
      • Q(e);N_GUARD::B(C)
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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).