MESON Chess Problem Database

Problem Display
PID: 156161 (3NB1nq/K5p1/7b/5k2/3Q3P/5P2/5n1N/1b6 w - - 0 1)

van Beek, Huibrecht

HM., Hietzing Chess Club, 1931

3NB1nq/K5p1/7b/5k2/3Q3P/5P2/5n1N/1b6

#2

7 + 7

1577 Jaarboek 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.fxg4#
    • 1...g6
      • 2.Bd7#
  • Tries
    • 1.Qd5+?
      • 1...Kf6
        • 2.Qe6#
      • 1...Kf4!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qe5#
      • 1...Sxg4
        • 2.fxg4#
      • 1...Be3
        • 2.Sxe3#
      • 1...Bf4
        • 2.Qd7#
      • 1...Sd3
        • 2.Qe4#
      • 1...g5
        • 2.Se3#
      • 1...g6
        • 2.Bd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE::P(B),XS(b)
    • P(e);SBLOCK::B(G)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(A);
    • Threat
      • QAR1(C)
    • Vars
      • S(b);OGATE,XS(A)::P(B),XS(b)
      • B(d);N_GUARD,P_PINQ(C)::S(A),XB(d)
      • B(d);SBLOCK::QAB(C)
      • S(b);N_GUARD,S_CUTB(a)::QAB1(C)
      • P(e);S_CUTB(d)::S(A)
      • P(e);SBLOCK::B(G)
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).