MESON Chess Problem Database

Problem Display
PID: 102860 (8/8/3KR3/3p3r/3kN3/1Q4p1/B3b3/b7 w - - 0 1)

Hermanson, Halvar

Canadian Chess, 1980

8/8/3KR3/3p3r/3kN3/1Q4p1/B3b3/b7

#2

5 + 6

6490 yacpdb 2009
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Qxc3#
    • 1...Bd3
      • 2.Qb6#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qe3#
      • 1...Bc3
        • 2.Qb6#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Re5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qe3#
      • 1...Bc3
        • 2.Qxd5#
      • 1...Bd3
        • 2.Sf3#

This anticipates 154481(1995)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB1(B),XB(a)
    • B(b);SBLOCK::QAB(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(B)
      • Vars
        • B(a);SBLOCK::QAB(B)
        • B(b);N_GUARD::QAR1(B),XB(b)
      • Refutation
        • R(f);
  • Actual
    • S(C);
    • Threat
      • QAB1(B)
    • Vars
      • B(a);SBLOCK::QAR1(B),XP(e)
      • B(b);N_GUARD::S(C)
HTML5 logo

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).