MESON Chess Problem Database

Problem Display
PID: 206790 (8/2B5/4N3/3k4/K5Q1/8/8/8 w - - 0 1)

McCombe, Alexander George

Australasian (The), 1870

8/2B5/4N3/3k4/K5Q1/8/8/8

#2

4 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qf3+?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe6!
    • 1.Qf5+?
      • 1...Kc6
        • 2.Qb5#
      • 1...Kc4!
    • 1.Qb4?
      • 1...Kc6
        • 2.Qb5#
      • 1...Kxe6!
  • Keys
    • 1.Qe2!
      • 1...Kc6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(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).