MESON Chess Problem Database

Problem Display
PID: 223169 (3K1bn1/6k1/8/4PQ2/3B1N2/8/8/8 w - - 0 1)

Jasper, WH

New York Telegram, 1886

3K1bn1/6k1/8/4PQ2/3B1N2/8/8/8

#2

5 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kh6
      • 2.Qg6#
  • Tries
    • 1.Sh5+?
      • 1...Kh6
        • 2.Be3#
      • 1...Kh8!
    • 1.Se6+?
      • 1...Kh6
        • 2.Be3#
      • 1...Kh8!
    • 1.e6+?
      • 1...Kh6
        • 2.Qg6#
        • 2.Qh5#
      • 1...Sf6!
  • Keys
    • 1.Qf7+!
      • 1...Kh6
        • 2.Qg6#
      • 1...Kxf7
        • 2.e6#
      • 1...Kh8
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(D)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);CHECK
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • Q(D);CHECK
    • Vars
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);P-FLIGHT,XQ(D)::P(C)
      • K(a);S_FLIGHT::S(B)
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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).