MESON Chess Problem Database

Problem Display
PID: 187865 (Q7/8/8/4k3/4N1P1/7P/2N1K3/8 w - - 0 1)

van Dijk, Johannes

Source?, 1910

Q7/8/8/4k3/4N1P1/7P/2N1K3/8

#2

6 + 1

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Se3?
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke6
        • 2.Qe8#
      • 1...Kf4!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kxd5!
    • 1.Qa5+?
      • 1...Kxe4
        • 2.Qf5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Ke6!
    • 1.Qc8?
      • threat
        • 2.Qf5#
      • 1...Kxe4
        • 2.Qf5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd5!
  • Keys
    • 1.Sb4!
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf4
        • 2.Sd3#
      • 1...Ke6
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
        • K(a);P-FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT,XS(D)::QAB1(F)
        • K(a);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAB1(F)
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(a);S_FLIGHT::QAR1(F)
      • K(a);S_FLIGHT::S(A)
      • K(a);P-FLIGHT::QAR2(F)
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).