MESON Chess Problem Database

Problem Display
PID: 273403 (7K/2Q5/4pPN1/2b1pkP1/7P/8/1R2B3/8 w - - 0 1)

Blom, JK

Probleemblad, 1952

7K/2Q5/4pPN1/2b1pkP1/7P/8/1R2B3/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxe5#
    • 1...Kxg6
      • 2.Qh7#
  • Tries
    • 1.Qxc5?
      • 1...Ke4
        • 2.Qxe5#
      • 1...Kxg6!
  • Keys
    • 1.Rb5!
      • 1...Ke4
        • 2.Qxe5#
      • 1...Kxg6
        • 2.Qh7#
      • 1...Bd4
        • 2.Qc2#
      • 1...Bg1
        • 2.Qc2#
      • 1...Bf2
        • 2.Qc2#
      • 1...Ba3
        • 2.Qc2#
      • 1...Be3
        • 2.Qc2#
      • 1...Bb4
        • 2.Qc2#
      • 1...Bb6
        • 2.Qc2#
      • 1...Bd6
        • 2.Qc2#
      • 1...Ba7
        • 2.Qc2#
      • 1...Be7
        • 2.Qc2#
      • 1...Bf8
        • 2.Qc2#
      • 1...e4
        • 2.Se7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,S_FLIGHT::QAR1(G),XP(b)
    • K(c);OGATEB,S_FLIGHT,XS(F)::QAB1(G)
  • Tries
    • Try
      • Q(G);P_PINP(b),XB(a)
      • Vars
        • K(c);N_GUARD,N_SPINP(b),S_FLIGHT::QAR1(G),XP(b)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT,XS(F)
  • Actual
    • R(A);
    • Vars
      • K(c);N_GUARD,S_FLIGHT::QAR1(G),XP(b)
      • K(c);OGATEB,S_FLIGHT,XS(F)::QAB1(G)
      • B(a);OGATE,P_SPINP(b)::QAB(G)
      • P(b);P_SPINB(a),SBLOCK::S(F)
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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).