MESON Chess Problem Database

Problem Display
PID: 140151 (K7/4p2B/2Q1P3/2p1k3/4b3/2R1R3/4P3/2B5 w - - 0 1)

Albarda, Johannes

Probleemblad, 1975

K7/4p2B/2Q1P3/2p1k3/4b3/2R1R3/4P3/2B5

#2

8 + 4

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qxe4#
    • 1...Kf4
      • 2.Rxe4#
  • Tries
    • 1.Qxe4+?
      • 1...Kf6
        • 2.Qg6#
        • 2.Qe5#
      • 1...Kd6!
  • Keys
    • 1.Rxc5+!
      • 1...Kd4
        • 2.Rxe4#
      • 1...Kf4
        • 2.Qxe4#
      • 1...Kf6
        • 2.Bb2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINB(a),S_FLIGHT::QAR1(E),XB(a)
    • K(c);N_SPINB(a),S_FLIGHT::B(A)+R(D),DCHECK,XB(a)
  • Tries
    • Try
      • Q(E);CHECK,N_SPINQ(E),XB(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(C);CHECK,XP(b)
    • Vars
      • K(c);N_SPINB(a),S_FLIGHT::R1(D),XB(a)
      • K(c);N_SPINB(a),S_FLIGHT::QAR1(E),XB(a)
      • K(c);N_SPINB(a),S_FLIGHT::B(A)
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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).