MESON Chess Problem Database

Problem Display
PID: 227588 (8/8/4P3/4k3/1KPNNpRp/4P3/4P3/4Q3 w - - 0 1)

van Dijk, Johannes

Noord-Hollandsch Dagblad, 1926

8/8/4P3/4k3/1KPNNpRp/4P3/4P3/4Q3

#2

9 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qxh4?
      • 1...fxe3
        • 2.Qf6#
        • 2.Qh8#
      • 1...f3
        • 2.Rg5#
        • 2.Qg3#
        • 2.Qg5#
        • 2.Qf6#
        • 2.Qh2#
        • 2.Qh5#
        • 2.Qh8#
      • 1...Kxe4!
    • 1.Qf1?
      • threat
        • 2.Qxf4#
      • 1...Kxe4
        • 2.Qxf4#
      • 1...fxe3
        • 2.Qf6#
      • 1...f3!
    • 1.Qh1?
      • threat
        • 2.Rg5#
      • 1...f3
        • 2.Qh2#
      • 1...fxe3!
    • 1.e7?
      • threat
        • 2.e8Q#
        • 2.e8R#
      • 1...Kxe4
        • 2.e8Q#
        • 2.e8R#
      • 1...f3
        • 2.e8Q#
        • 2.e8R#
      • 1...h3
        • 2.e8Q#
        • 2.e8R#
      • 1...fxe3!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qxf4#
      • 1...Kxe4
        • 2.Qxf4#
      • 1...fxe3
        • 2.Qf6#
      • 1...f3
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);XP(b)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(a),XS(G)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(a)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a),XS(G)::QAR1(A),XP(a)
        • P(a);OGATE,XP(C)::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • R(H)
      • Vars
        • P(a);OGATEB::QAB(A)
      • Refutation
        • P(a);XP(C)
    • Try
      • P(I);
      • Threat
        • P=Q
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a),XS(G)::P=Q
        • P(a);::P=Q
        • P(b);::P=Q
      • Refutation
        • P(a);XP(C)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(a)
    • Vars
      • K(c);P-FLIGHT,P_SPINP(a),XS(G)::QAR1(A),XP(a)
      • P(a);OGATE,XP(C)::QAB1(A)
      • P(a);OGATEB::QAB(A)
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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).