MESON Chess Problem Database

Problem Display
PID: 65546 (7B/8/8/3k4/1PNNn1p1/7B/8/3Q2K1 w - - 0 1)

Verbeek, Willem Jan Louis

Sissa, 1860

7B/8/8/3k4/1PNNn1p1/7B/8/3Q2K1

#2

7 + 3

17412 Schweizerische Schachzeitung (of Chur) 1860
5799 Zondagsblad 1879
5689 The Chess Monthly (Hoffer) 1880

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qb3#
    • 1...g3
      • 2.Be6#
  • Tries
    • 1.Bg2?
      • 1...Kxc4
        • 2.Qb3#
      • 1...g3!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qf7#
      • 1...Kxc4
        • 2.Qb3#
      • 1...gxf3
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
    • P(b);OGATE::B(C)
  • Tries
    • Try
      • B(C);P_PINS(a)
      • Vars
        • K(c);N_SPINS(a),OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);P_PINS(a)
    • Threat
      • QAB(A)
    • Vars
      • K(c);N_SPINS(a),OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • P(b);N_SPINS(a),OGATE,XQ(A)::B(C)
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).