MESON Chess Problem Database

Problem Display
PID: 250233 (6B1/5Q2/6qp/7k/5P2/7K/8/8 w - - 0 1)

Szasz, Lajos

Magyar Sakkvilag, 1927

6B1/5Q2/6qp/7k/5P2/7K/8/8

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf7
      • 2.Bxf7#
  • Tries
    • 1.Qe8?
      • 1...Qf7
        • 2.Bxf7#
        • 2.Qxf7#
      • 1...Qxe8!
    • 1.Qf5+?
      • 1...Qg5
        • 2.Bf7#
      • 1...Qxf5+!
  • Keys
    • 1.Qd5+!
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Qg5
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_SPINQ(b),OGATE,XQ(C)::B(D),XQ(b)
  • Tries
    • Try
      • Q(C);
      • Refutation
        • Q(b);N_SPINQ(b),XQ(C)
    • Try
      • Q(C);CHECK,N_PINQ(b)
      • Vars
        • Q(b);P_SPINQ(b)::B(D)
      • Refutation
        • Q(b);CHECK,XQ(C)
  • Actual
    • Q(C);CHECK,N_PINQ(b)
    • Vars
      • Q(b);CHECK,N_GUARD,P_SPINQ(b)::QAR2(C),XQ(b)
      • Q(b);P_SPINQ(b)::B(D)
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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).