MESON Chess Problem Database

Problem Display
PID: 6094 (8/1K1kpN2/3N1P2/8/8/8/Q7/8 w - - 0 1)

Lindgren, Frithiof

Aftonbladet, 1927

8/1K1kpN2/3N1P2/8/8/8/Q7/8

#2

5 + 2

3310 2345 Chess Problems 1997
2786 More Fun with Chess Miniatures 2000
145 StrateGems 2008

SOLUTION

  • SOUND
  • Sets
    • 1...e6
      • 2.Qa4#
  • Tries
    • 1.Se5+?
      • 1...Kd8
        • 2.Qg8#
        • 2.Qa5#
        • 2.Qa8#
      • 1...Kxd6!
    • 1.Qc2?
      • threat
        • 2.Qc8#
      • 1...Ke6
        • 2.Qf5#
      • 1...exf6!
    • 1.Qa8?
      • threat
        • 2.Qc8#
      • 1...exf6
        • 2.Qe8#
      • 1...Ke6!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxe7#
      • 1...exd6
        • 2.Qe7#
      • 1...exf6
        • 2.Qe8#
      • 1...e5
        • 2.Qg4#
      • 1...e6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAB(A)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • P(b);XP(C)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(b);XP(C)::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(b)
    • Vars
      • P(b);XS(B)::QAR1(A)
      • P(b);OGATE,XP(C)::QAB1(A)
      • P(b);N_GUARD::QAB(A)
      • P(b);SBLOCK::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).