MESON Chess Problem Database

Problem Display
PID: 206421 (8/8/8/8/8/4PkP1/5N2/4KQ2 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1925

8/8/8/8/8/4PkP1/5N2/4KQ2

#2

5 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe3
      • 2.Qd3#
    • 1...Kxg3
      • 2.Qh3#
  • Tries
    • 1.Qg2+?
      • 1...Kxe3
        • 2.Qe4#
      • 1...Kxg2!
    • 1.e4?
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxg3!
    • 1.g4?
      • threat
        • 2.Qh3#
      • 1...Kg3
        • 2.Qh3#
      • 1...Kxe3!
  • Keys
    • 1.Qh1+!
      • 1...Kxe3
        • 2.Qe4#
      • 1...Kxg3
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XP(D)::QAR1(B)
    • K(a);OGATEB,P-FLIGHT,XP(E)::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT,XP(D)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • P(D);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • P(E);
      • Threat
        • QAR2(B)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
  • Actual
    • Q(B);CHECK
    • Vars
      • K(a);OGATE,P-FLIGHT,XP(D)::QAR1(B)
      • K(a);OGATEB,P-FLIGHT,XP(E)::QAR1(B)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).