MESON Chess Problem Database

Problem Display
PID: 122129 (1b6/8/k1K2Q2/p7/4p3/8/8/n7 w - - 0 1)

Helledie, Holger

Land og Folk, 1971

1b6/8/k1K2Q2/p7/4p3/8/8/n7

#2

2 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba7
      • 2.Qf1#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qb6#
        • 2.Qb7#
      • 1...Ka7
        • 2.Qb7#
      • 1...a4
        • 2.Qb6#
      • 1...Ba7
        • 2.Qe2#
        • 2.Qb5#
        • 2.Qb7#
      • 1...Bc7
        • 2.Qb7#
      • 1...Sb3!
    • 1.Qd4?
      • threat
        • 2.Qb6#
      • 1...Ba7
        • 2.Qc4#
      • 1...Bc7!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qb6#
      • 1...Ka7
        • 2.Qxa5#
      • 1...Ba7
        • 2.Qc8#
      • 1...Bc7
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(e);SBLOCK::QAB(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT::QAR1(B)
        • P(c);::QAR1(B)
        • B(e);::QAB1(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • B(e);SBLOCK::QAB(B)
      • Refutation
        • B(e);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(d);P-FLIGHT::QAR2(B),XP(c)
      • B(e);SBLOCK::QAB(B)
      • B(e);OGATE::QAR2(B)
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).