MESON Chess Problem Database

Problem Display
PID: 228636 (8/4N3/3pk3/8/7B/3K4/8/Q7 w - - 0 1)

Chamberlain, Brian E

Problem Observer, 2020

8/4N3/3pk3/8/7B/3K4/8/Q7

#2

4 + 2

5454 Near Snap 2021
3713 Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qh8?
      • 1...Kd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Qg8#
      • 1...d5!
  • Keys
    • 1.Qa8!
      • 1...Ke5
        • 2.Qe4#
      • 1...Kd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Qg8#
      • 1...d5
        • 2.Qxd5#

Anticipated by 4846(1892), 16449(1940)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);S_FLIGHT::QAB1(A)
      • P(a);::QAB1(A),XP(a)
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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).