MESON Chess Problem Database

Problem Display
PID: 115478 (5B2/N1P2p2/3pk1nR/rQ4p1/2n1b1P1/1BK5/4R3/8 w - - 0 1)

ten Cate, Pieter

Jerusalem Post, 1962

5B2/N1P2p2/3pk1nR/rQ4p1/2n1b1P1/1BK5/4R3/8

#2

9 + 8

102 Probleemblad 1975
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qf5#
    • 1...Ra2
      • 2.Qf5#
    • 1...Ra3
      • 2.Qf5#
    • 1...Ra4
      • 2.Qf5#
    • 1...Ra6
      • 2.Qf5#
    • 1...Rxa7
      • 2.Qf5#
  • Tries
    • 1.Qe8+?
      • 1...Kf6
        • 2.Qe7#
      • 1...Kd5!
  • Keys
    • 1.Qd7+!
      • 1...Kd5
        • 2.Qxd6#
      • 1...Ke5
        • 2.Qf5#
      • 1...Kf6
        • 2.Qe7#
      • 1...Kxd7
        • 2.c8Q#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(c);N_GUARD::QAB1(E)
    • R(c);N_GUARD,P_PINB(B)::QAB1(E)
    • R(c);N_GUARD,XS(G)::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);N_SPINB(b),N_SPINS(a),P-FLIGHT,P_SPINS(g)::QAB1(E)
      • Refutation
        • K(f);N_SPINB(b),S_FLIGHT
  • Actual
    • Q(E);CHECK
    • Vars
      • K(f);N_SPINB(b),P_SPINP(e),S_FLIGHT::QAR1(E),XP(e)
      • K(f);N_SPINS(a),OGATE,P-FLIGHT::QAR1(E)
      • K(f);N_SPINB(b),N_SPINS(a),P-FLIGHT,P_SPINS(g)::QAB1(E)
      • K(f);N_SPINB(b),N_SPINS(a),S_FLIGHT,XQ(E)::P=Q
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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).