MESON Chess Problem Database

Problem Display
PID: 115453 (8/1K6/B7/8/1k2N3/4P3/Q7/8 w - - 0 1)

Carpenter, George Edward

La Presse, 1911

8/1K6/B7/8/1k2N3/4P3/Q7/8

#2

5 + 1

6490 yacpdb 2009
5454 Near Snap 2014
14986 White-Hume Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sc3?
      • 1...Kc5
        • 2.Qa3#
      • 1...Kxc3!
    • 1.Qb3+?
      • 1...Ka5
        • 2.Qa3#
        • 2.Qb5#
      • 1...Kxb3!
    • 1.Qc4+?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka3!
    • 1.Qb2+?
      • 1...Ka5
        • 2.Qa3#
        • 2.Qb5#
      • 1...Ka4!
  • Keys
    • 1.Sf6!
      • 1...Kc3
        • 2.Sd5#
      • 1...Kc5
        • 2.Qa3#

This anticipates 106259(1967)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::S(C)
      • K(a);S_FLIGHT::QAB(A)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).