MESON Chess Problem Database

Problem Display
PID: 67254 (6kq/6pN/8/6K1/2R5/8/7Q/8 w - - 0 1)

Sujitno, K

Probleemblad, 2006

6kq/6pN/8/6K1/2R5/8/7Q/8

#2

4 + 3

3713 Snap 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Rc7?
      • 1...g6
        • 2.Qa2#
      • 1...Qxh7!
    • 1.Qb8+?
      • 1...Kxh7
        • 2.Rh4#
      • 1...Kf7!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Rh4#
      • 1...Kf7
        • 2.Re4#
      • 1...Kxh7
        • 2.Rh4#
      • 1...Qxh7
        • 2.Rc8#
      • 1...g6
        • 2.Rc7#

Anticipated by 22182(1967), 69864(2006)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Vars
        • P(a);::QAB(A)
      • Refutation
        • Q(c);XS(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(D)::R(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(B)
    • Vars
      • K(b);S_FLIGHT::QAB(A)+R(B)
      • K(b);S_FLIGHT,XS(D)::R(B)
      • Q(c);SBLOCK,XS(D)::QAB(A)+R(B),DCHECK
      • P(a);::QAB(A)+R(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).