MESON Chess Problem Database

Problem Display
PID: 241963 (8/8/8/8/7p/4pK1P/4p2k/4Q3 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/8/8/8/7p/4pK1P/4p2k/4Q3

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh3
      • 2.Qh1#
  • Tries
    • 1.Kf4?
      • 1...Kxh3
        • 2.Qh1#
      • 1...Kg2!
    • 1.Qf2+?
      • 1...Kh1
        • 2.Qg2#
      • 1...Kxh3
        • 2.Qg2#
      • 1...exf2!
    • 1.Qg3+?
      • 1...Kh1
        • 2.Qg2#
      • 1...hxg3!
    • 1.Qg1+?
      • 1...Kxh3
        • 2.Qh1#
        • 2.Qg2#
      • 1...Kxg1!
  • Keys
    • 1.Qxe2+!
      • 1...Kg1
        • 2.Qg2#
      • 1...Kh1
        • 2.Qg2#
      • 1...Kxh3
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,XP(C)::QAR2(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT,XP(C)::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • K(b);P-FLIGHT,XP(C)::QAB1(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);CHECK,XP(a)
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);P-FLIGHT::QAB1(A)
      • K(b);P-FLIGHT,XP(C)::QAB1(A)
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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).