MESON Chess Problem Database

Problem Display
PID: 231359 (4nRB1/5PR1/3k1N2/8/8/K3Q3/8/8 w - - 0 1)

Szasz, Lajos

3rd HM., Magyar Munkas Sakkor, 1927

4nRB1/5PR1/3k1N2/8/8/K3Q3/8/8

#2

7 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qd4+?
      • 1...Kc6
        • 2.fxe8Q#
        • 2.fxe8B#
      • 1...Kc7
        • 2.fxe8Q#
      • 1...Ke7
        • 2.Rxe8#
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Ke6!
    • 1.Qc5+?
      • 1...Ke6
        • 2.fxe8Q#
        • 2.fxe8S#
        • 2.fxe8B#
        • 2.fxe8R#
      • 1...Kxc5!
    • 1.Qb6+?
      • 1...Ke7
        • 2.Rxe8#
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Ke5!
  • Keys
    • 1.Se4+!
      • 1...Kd5
        • 2.fxe8Q#
      • 1...Ke5
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Kc6
        • 2.fxe8Q#
        • 2.fxe8B#
      • 1...Ke6
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Kc7
        • 2.fxe8Q#
      • 1...Kd7
        • 2.fxe8Q#
      • 1...Ke7
        • 2.fxe8Q#
        • 2.fxe8R#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::PXS(b)=Q
        • K(a);S_FLIGHT::PXS(b)=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);CHECK
    • Vars
      • K(a);P-FLIGHT::PXS(b)=Q
      • K(a);S_FLIGHT::PXS(b)=Q
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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).