MESON Chess Problem Database

Problem Display
PID: 2451 (1r2k3/8/1b2K3/8/8/8/Q7/8 w - - 0 1)

Kling, Josef

The Chess Euclid, 1849

1r2k3/8/1b2K3/8/8/8/Q7/8

#2

2 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...Bd4
        • 2.Qxb8#
      • 1...Bc5
        • 2.Qxb8#
      • 1...Kd8!
    • 1.Qa4+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qxb8#
      • 1...Kf8
        • 2.Qh8#
      • 1...Bd4
        • 2.Qxb8#
      • 1...Bc5
        • 2.Qxb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • B(a);OGATE::QAR(A),XR(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(c);P-FLIGHT::QAR2(A),XR(b)
      • K(c);P-FLIGHT::QAR2(A)
      • B(a);N_GUARD::QAR(A),XR(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).