MESON Chess Problem Database

Problem Display
PID: 61320 (1q6/2r5/4N3/nbQ5/kN6/1p6/1P6/2K1B3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach-Aktiv, 2005

1q6/2r5/4N3/nbQ5/kN6/1p6/1P6/2K1B3

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5+
      • 2.Sxc5#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Qa3#
        • 2.Qb4#
      • 1...Rxc5
        • 2.Sxc5#
      • 1...Bf1
        • 2.Qxa5#
      • 1...Be2
        • 2.Qxa5#
      • 1...Bd3
        • 2.Qxa5#
      • 1...Bc4
        • 2.Qxa5#
      • 1...Ba6
        • 2.Qxa5#
      • 1...Bc6
        • 2.Qxa5#
      • 1...Bd7
        • 2.Qxa5#
      • 1...Be8
        • 2.Qxa5#
      • 1...Sc4
        • 2.Qb4#
      • 1...Sc6
        • 2.Qa3#
      • 1...Qf8!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sc3#
      • 1...Rxc5+
        • 2.Sxc5#
      • 1...Qh8
        • 2.Sb6#
      • 1...Sc4
        • 2.Qb4#
      • 1...Sc6
        • 2.Qa3#
      • 1...Sb7
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,XQ(E)::S(F),XR(e)
  • Tries
    • Try
      • S(D);N_SPINQ(E)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);P_PINS(D),XQ(E)::S(F),XR(e)
        • B(d);OGATE::QAR1(E),XS(c)
        • S(c);::QAR1(E)
      • Refutation
        • Q(f);
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • R(e);CHECK,XQ(E)::S(F),XR(e)
      • Q(f);N_GUARD::S(D)
      • S(c);N_PINQ(E)::QAR1(E)
      • S(c);S_CUTQ(f)::S(D)
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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).