MESON Chess Problem Database

Problem Display
PID: 129762 (4b3/4p3/2n1k3/3RnR1P/4N3/4P3/8/KBQ5 w - - 0 1)

Pater, Karl

Deutsche Schachzeitung, 1884

4b3/4p3/2n1k3/3RnR1P/4N3/4P3/8/KBQ5

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Sg5#
    • 1...Sf3
      • 2.Sc5#
    • 1...Sc4
      • 2.Sc5#
      • 2.Sg5#
    • 1...Sg4
      • 2.Sc5#
      • 2.Sg5#
    • 1...Sg6
      • 2.Sc5#
      • 2.Sg5#
    • 1...Sd7
      • 2.Sg5#
      • 2.Qxc6#
    • 1...Sf7
      • 2.Sc5#
  • Tries
    • 1.Rf6+?
      • 1...Kxd5
        • 2.Qc5#
      • 1...exf6!
    • 1.Qc4?
      • threat
        • 2.Sc5#
        • 2.Sg5#
      • 1...Sd3
        • 2.Sg5#
      • 1...Sf3
        • 2.Sc5#
      • 1...Sd7
        • 2.Sg5#
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
        • 2.Rde5#
        • 2.Qxc6#
      • 1...Sf7
        • 2.Sc5#
      • 1...Kxf5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Sc5#
        • 2.Sg5#
      • 1...Kxd5
        • 2.Ba2#
      • 1...Kxf5
        • 2.Qh3#
      • 1...Sd3
        • 2.Sg5#
      • 1...Sf3
        • 2.Sc5#
      • 1...Sd7
        • 2.Sg5#
      • 1...Sf7
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);::S(E)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAR1(C)
      • Refutation
        • P(d);XR(G)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::S(E)
      • Refutation
        • K(c);P_SPINS(a),S_FLIGHT,XR(G)
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);OGATEB,P_SPINS(a),S_FLIGHT,XR(F)::B(B)
      • K(c);OGATEB,P_SPINS(a),S_FLIGHT,XR(G)::QAB(C)
      • S(a);::S(E)
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).