MESON Chess Problem Database

Problem Display
PID: 178747 (6nR/6kN/3K2P1/6Q1/8/8/8/8 w - - 0 1)

Larsson, Bror

Springaren, 1954

6nR/6kN/3K2P1/6Q1/8/8/8/8

#2

5 + 2

3713 Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sh6
      • 2.Qf6#
  • Tries
    • 1.Qf6+?
      • 1...Kh6
        • 2.Sg5#
        • 2.Sf8#
      • 1...Sxf6!
  • Keys
    • 1.Sf8!
      • 1...Kxf8
        • 2.Qe7#
      • 1...Kxh8
        • 2.g7#
      • 1...Sf6
        • 2.Qh6#
      • 1...Sh6
        • 2.Qe5#
      • 1...Se7
        • 2.Qe5#

Anticipated by 11236(1937)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,SBLOCK::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • S(b);XQ(A)
  • Actual
    • S(D);
    • Vars
      • K(a);P_SPINS(b),S_FLIGHT,XS(D)::QAB1(A)
      • K(a);OGATE,S_FLIGHT,XR(E)::P(C)
      • S(b);N_GUARD,SBLOCK::QAB1(A)
      • S(b);N_GUARD::QAB(A)
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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).