MESON Chess Problem Database

Problem Display
PID: 227544 (7K/8/4pnB1/5q1n/N2B4/1p5p/2pkP2Q/2R1R3 w - - 0 1)

Malmstrom, Birger Georg Christens

Sydsvenska Dagbladet Snallposten, 1926

7K/8/4pnB1/5q1n/N2B4/1p5p/2pkP2Q/2R1R3

#2

8 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.exd3#
    • 1...Qf3
      • 2.exf3#
    • 1...Qa5
      • 2.e3#
    • 1...Qc5
      • 2.e3#
  • Tries
    • 1.Sb2?
      • threat
        • 2.Sc4#
      • 1...Qd3
        • 2.exd3#
      • 1...Qc5
        • 2.e3#
        • 2.e4#
      • 1...Qd5
        • 2.e4#
      • 1...Qb5!
    • 1.e3+?
      • 1...Qf2
        • 2.Bc3#
        • 2.Qxf2#
      • 1...Kd3!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sxb3#
      • 1...Qxc5
        • 2.e3#
      • 1...Qd3
        • 2.exd3#
      • 1...Qf3
        • 2.exf3#
      • 1...Qd5
        • 2.e4#
      • 1...b2
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(e);OGATE::QAR(D)+P(C),XQ(e)
    • Q(e);N_GUARD::QAR(D)+P(C)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • Q(e);OGATE::QAR(D)+P(C),XQ(e)
        • Q(e);N_GUARD::QAR(D)+P(C)
      • Refutation
        • Q(e);
    • Try
      • P(C);CHECK
      • Refutation
        • K(b);P-FLIGHT,P_SPINQ(e)
  • Actual
    • S(E);
    • Threat
      • S(E),XP(c)
    • Vars
      • Q(e);N_GUARD,XS(E)::QAR(D)+P(C)
      • Q(e);OGATE::QAR(D)+P(C),XQ(e)
      • Q(e);N_GUARD::QAR(D)+P(C)
      • P(c);::S(E)
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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).