MESON Chess Problem Database

Problem Display
PID: 102281 (8/7Q/B2pK3/1P6/q1kP4/2P5/1P6/N7 w - - 0 1)

Lindeberg, FM

Sydsvenska Dagbladet Snallposten, 1921

8/7Q/B2pK3/1P6/q1kP4/2P5/1P6/N7

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.b6#
    • 1...Qc2
      • 2.b6#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qf1#
      • 1...Qc2
        • 2.b6#
      • 1...Qd1
        • 2.b6#
      • 1...Qxa1!
    • 1.Qe4?
      • threat
        • 2.Qe2#
      • 1...Qd1
        • 2.b6#
      • 1...Qc2
        • 2.b6#
      • 1...Qxa1!
    • 1.Qf5?
      • threat
        • 2.Qf1#
      • 1...Qd1
        • 2.b6#
      • 1...Qc2
        • 2.b6#
      • 1...Qxa1!
    • 1.Qh3?
      • threat
        • 2.Qf1#
      • 1...Qd1
        • 2.b6#
      • 1...Qc2
        • 2.b6#
      • 1...Qxa1!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qe2#
      • 1...Qxc2
        • 2.b6#
      • 1...Qxa1
        • 2.b3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD::B(F)+P(E)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • Q(a);N_GUARD::B(F)+P(E)
      • Refutation
        • Q(a);XS(A)
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • Q(a);N_GUARD::B(F)+P(E)
      • Refutation
        • Q(a);XS(A)
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • Q(a);N_GUARD::B(F)+P(E)
      • Refutation
        • Q(a);XS(A)
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • Q(a);N_GUARD::B(F)+P(E)
      • Refutation
        • Q(a);XS(A)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • Q(a);N_GUARD,XQ(H)::B(F)+P(E)
      • Q(a);N_GUARD,XS(A)::P(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).