MESON Chess Problem Database

Problem Display
PID: 241959 (8/3N3Q/8/6k1/4P3/7K/3P4/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/3N3Q/8/6k1/4P3/7K/3P4/8

#2

5 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qf5#
  • Tries
    • 1.Kg2?
      • 1...Kf4
        • 2.Qf5#
        • 2.Qh4#
      • 1...Kg4!
    • 1.Kh2?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kg4!
    • 1.Sc5?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kf6!
    • 1.Se5?
      • threat
        • 2.Qh4#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kf6!
    • 1.Sb6?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kf6!
    • 1.Sf6?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kxf6!
    • 1.Sb8?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kf6!
    • 1.Sf8?
      • threat
        • 2.Qh4#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kf6!
    • 1.Qg6+?
      • 1...Kf4
        • 2.Qf5#
        • 2.Qg4#
      • 1...Kxg6!
    • 1.Qh5+?
      • 1...Kf4
        • 2.Qg4#
        • 2.Qf5#
      • 1...Kxh5!
  • Keys
    • 1.Qg7+!
      • 1...Kf4
        • 2.Qg4#
      • 1...Kh5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(E)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
  • Actual
    • Q(E);CHECK
    • Vars
      • K(a);OGATE,S_FLIGHT::QAR1(E)
      • K(a);P-FLIGHT::S(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).