MESON Chess Problem Database

Problem Display
PID: 266018 (1KNB4/2QR4/2p1p2p/1pr2kpP/1q4n1/4p3/2N4p/6bB w - - 0 1)

van Beek, Huibrecht

Probleemblad, 1950

1KNB4/2QR4/2p1p2p/1pr2kpP/1q4n1/4p3/2N4p/6bB

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Sd4#
    • 1...Qa3
      • 2.Sd4#
    • 1...Qa5
      • 2.Sd4#
    • 1...Qb1
      • 2.Sd4#
    • 1...Qb3
      • 2.Sd4#
    • 1...Qd4
      • 2.Sxd4#
    • 1...Sf2
      • 2.Sxe3#
  • Keys
    • 1.Rd4!
      • threat
        • 2.Be4#
      • 1...Qxd4
        • 2.Sxd4#
      • 1...e5
        • 2.Qd7#
      • 1...Re5
        • 2.Qh7#
      • 1...Sf2
        • 2.Sxe3#
      • 1...Se5
        • 2.Sd6#
      • 1...Sf6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(d);N_GUARD::S(B)
    • Q(d);N_GUARD::S(B),XQ(d)
    • S(e);N_GUARD,S_CUTB(a)::S(B),XP(c)
  • Actual
    • R(E);
    • Threat
      • B(A)
    • Vars
      • Q(d);XR(E)::S(B),XQ(d)
      • P(k);OGATEB,SBLOCK::QAB(D)
      • R(g);SBLOCK::QAB(D)
      • S(e);N_GUARD,S_CUTB(a)::S(B),XP(c)
      • S(e);SBLOCK::S(G)
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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).