MESON Chess Problem Database

Problem Display
PID: 231559 (8/3P4/1Q1p4/3kNK2/8/1P6/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1927

8/3P4/1Q1p4/3kNK2/8/1P6/8/8

#2

5 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...dxe5
      • 2.d8Q#
      • 2.d8R#
  • Tries
    • 1.Qc5+?
      • 1...dxc5
        • 2.d8Q#
        • 2.d8R#
      • 1...Kxc5!
    • 1.Qc7?
      • threat
        • 2.Qc4#
      • 1...dxe5
        • 2.d8Q#
        • 2.d8R#
      • 1...Kd4!
  • Keys
    • 1.b4!
      • 1...dxe5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);XS(B)::P=Q
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • P(b);SBLOCK,XQ(D)::P=Q
      • Refutation
        • K(a);P-FLIGHT,XQ(D)
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • P(b);XS(B)::P=Q
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • P(A);
    • Vars
      • P(b);N_GUARD,XS(B)::QAR1(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).