MESON Chess Problem Database

Problem Display
PID: 181141 (8/5QK1/8/1PN1k3/1B4n1/2P5/8/8 w - - 0 1)

van Dijk, Johannes

De Telegraaf, 1904

8/5QK1/8/1PN1k3/1B4n1/2P5/8/8

#2

6 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Sd3#
  • Tries
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qd4#
        • 2.c4#
      • 1...Kxf4!
    • 1.Qf5+?
      • 1...Kd6
        • 2.Sa6#
      • 1...Kxf5!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Qd4#
        • 2.Qe6#
      • 1...Sxf6!
  • Keys
    • 1.c4!
      • 1...Kd4
        • 2.Qf4#
      • 1...Kd6
        • 2.Sd3#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sf2
        • 2.Qf6#
      • 1...Sh2
        • 2.Qf6#
      • 1...Se3
        • 2.Qf6#
      • 1...Sh6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(B)+S(D)
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::B(B)+S(D)
      • Refutation
        • K(b);P-FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • S(a);XQ(E)
  • Actual
    • P(A);
    • Vars
      • K(b);S_FLIGHT::QAR2(E)
      • K(b);S_FLIGHT::B(B)+S(D)
      • S(a);N_GUARD::QAB1(E),XS(a)
      • S(a);N_GUARD::QAB1(E)
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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).