MESON Chess Problem Database

Problem Display
PID: 9304 (8/8/k1K4Q/8/8/8/8/8 w - - 0 1)

Courtenay, Edward H

New York Clipper, 1868

8/8/k1K4Q/8/8/8/8/8

#2

2 + 1

5454 Near Snap 2009
3713 Snap 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qa3#
        • 2.Qa1#
      • 1...Ka5
        • 2.Qa3#
      • 1...Ka7!
    • 1.Qf8?
      • threat
        • 2.Qa3#
        • 2.Qa8#
      • 1...Ka5
        • 2.Qa3#
      • 1...Ka7!
    • 1.Qh3?
      • threat
        • 2.Qa3#
      • 1...Ka5
        • 2.Qa3#
      • 1...Ka7!
    • 1.Qd6?
      • threat
        • 2.Qa3#
      • 1...Ka5
        • 2.Qa3#
      • 1...Ka7!
  • Keys
    • 1.Qe3!
      • 1...Ka5
        • 2.Qa3#

Anticipated by 2446(0000)

This anticipates 44560(1868), 6393(1929), 15222(1981)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR2(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).