MESON Chess Problem Database

Problem Display
PID: 214771 (5K2/2pb4/3p4/3k4/3N4/N1P5/6P1/5Q2 w - - 0 1)

Anonymous

Detroit Free Press, 1878

5K2/2pb4/3p4/3k4/3N4/N1P5/6P1/5Q2

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Qf5#
    • 1...Bb5
      • 2.Qf5#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bc6
      • 2.Qf5#
    • 1...Be8
      • 2.Qf5#
  • Tries
    • 1.Qf3+?
      • 1...Ke5
        • 2.Sc4#
      • 1...Kc5!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc5
        • 2.Qb5#
      • 1...Kxc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Qf7#
      • 1...Bxc6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(d);N_GUARD::QAR2(A)
    • B(d);N_GUARD::QAR2(A),XB(d)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::S(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(E);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT,XS(E)::QAB1(A)
      • B(d);N_GUARD,SBLOCK,XS(E)::QAR2(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).