MESON Chess Problem Database

Problem Display
PID: 241967 (8/3k4/3N1K2/QPp5/2P5/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/3k4/3N1K2/QPp5/2P5/8/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Qd8#
  • Tries
    • 1.Kf5?
      • 1...Kxd6
        • 2.Qd8#
      • 1...Ke7!
    • 1.Sb7?
      • threat
        • 2.Qd8#
      • 1...Ke8
        • 2.Qd8#
      • 1...Kc8!
    • 1.Sf7?
      • threat
        • 2.Qd8#
      • 1...Ke8
        • 2.Qd8#
      • 1...Kc8!
    • 1.Se8?
      • 1...Kc8
        • 2.Qc7#
      • 1...Kxe8!
    • 1.Qe1?
      • threat
        • 2.Qe7#
      • 1...Kxd6
        • 2.Qe7#
      • 1...Kd8
        • 2.Qe7#
      • 1...Kc7!
    • 1.Qa6?
      • 1...Kd8
        • 2.Qc8#
      • 1...Kc7!
    • 1.Qa8?
      • 1...Kxd6
        • 2.Qc6#
        • 2.Qd8#
      • 1...Kc7!
  • Keys
    • 1.Qa7+!
      • 1...Kxd6
        • 2.Qe7#
      • 1...Kd8
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,XS(D)::QAR2(B)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XS(D)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAB1(B)
        • K(b);P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);CHECK
    • Vars
      • K(b);OGATE,P-FLIGHT,XS(D)::QAB1(B)
      • K(b);OGATE,P-FLIGHT::QAB1(B)
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).