MESON Chess Problem Database

Problem Display
PID: 207493 (8/4R3/3r1b2/4N3/4k3/3n1b2/4N3/2Q3K1 w - - 0 1)

Gold, Samuel

Magyarorszag es a Nagyvilag, 1871

8/4R3/3r1b2/4N3/4k3/3n1b2/4N3/2Q3K1

#2

5 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qc4#
    • 1...Kf5
      • 2.Sg3#
  • Tries
    • 1.Sg3+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kd4!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qc4#
        • 2.Qd4#
      • 1...Sxf4!
  • Keys
    • 1.Qe3+!
      • 1...Kxe3
        • 2.Sc4#
      • 1...Kd5
        • 2.Sc3#
        • 2.Qd4#
      • 1...Kf5
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(c);S_FLIGHT::QAB1(A)
    • K(c);S_FLIGHT::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(c);P-FLIGHT,XQ(A)::R(E)+S(D),DCHECK
      • K(c);S_FLIGHT::S(C)
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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).