MESON Chess Problem Database

Problem Display
PID: 215691 (4K3/8/N7/3k4/3N2B1/8/1Q2P3/8 w - - 0 1)

Anonymous

Elmira Telegram, 1881

4K3/8/N7/3k4/3N2B1/8/1Q2P3/8

#2

6 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Be6#
  • Tries
    • 1.Sb5?
      • 1...Kc4
        • 2.Be6#
      • 1...Ke4
        • 2.Qd4#
      • 1...Kc6!
    • 1.Bf3+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Kd6
        • 2.Qb8#
      • 1...Ke5!
  • Keys
    • 1.Sf5!
      • 1...Kc4
        • 2.Se3#
      • 1...Ke4
        • 2.Qd4#
      • 1...Kc6
        • 2.Bf3#
      • 1...Ke6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(D)
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::B(D)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::S(C)
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::B(D)
      • K(a);S_FLIGHT::S(E)
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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).