MESON Chess Problem Database

Problem Display
PID: 100033 (8/8/1Q6/4k3/7K/3PN3/4P3/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/8/1Q6/4k3/7K/3PN3/4P3/8

#2

5 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qd4#
  • Tries
    • 1.Sc4+?
      • 1...Kf4
        • 2.Qf2#
        • 2.Qf6#
      • 1...Kd5
        • 2.Qd6#
        • 2.e4#
      • 1...Kf5!
    • 1.Sd5?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kxd5!
    • 1.Qd8?
      • 1...Kf4
        • 2.Qg5#
        • 2.Qd4#
      • 1...Ke6!
    • 1.Qc6?
      • 1...Kf4
        • 2.Qe4#
      • 1...Kd4!
    • 1.Qg6?
      • 1...Kf4
        • 2.Qe4#
        • 2.Qg3#
        • 2.Qg5#
      • 1...Kd4!
  • Keys
    • 1.Sg4+!
      • 1...Kf4
        • 2.Qf2#
        • 2.Qf6#
      • 1...Kd5
        • 2.e4#
      • 1...Kf5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::QAR2(E)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(E);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);CHECK
    • Vars
      • K(a);P-FLIGHT::P(A)
      • K(a);P-FLIGHT::QAR1(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).