MESON Chess Problem Database

Problem Display
PID: 241972 (8/4p3/4K3/4P3/4k3/8/1N6/3N1Q2 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/4p3/4K3/4P3/4k3/8/1N6/3N1Q2

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc4#
  • Tries
    • 1.Qe2+?
      • 1...Kd4
        • 2.Qc4#
        • 2.Qe3#
      • 1...Kf4!
    • 1.Qh3?
      • threat
        • 2.Qg4#
        • 2.Qe3#
      • 1...Kd4
        • 2.Qe3#
      • 1...Kf4!
    • 1.Qh1+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf4!
    • 1.Qf3+?
      • 1...Kd4
        • 2.Qd5#
        • 2.Qe3#
      • 1...Kxf3!
  • Keys
    • 1.Qg2+!
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);CHECK
    • Vars
      • K(a);OGATE,P-FLIGHT::QAR1(B)
      • K(a);P-FLIGHT::S(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).