MESON Chess Problem Database

Problem Display
PID: 268212 (8/3p4/4p3/4kpN1/1K2N2B/5B2/8/6Q1 w - - 0 1)

Eland, R

Probleemblad, 1985

8/3p4/4p3/4kpN1/1K2N2B/5B2/8/6Q1

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Bg3#
    • 1...Kd5
      • 2.Qc5#
  • Tries
    • 1.Sf7+?
      • 1...Kd5
        • 2.Sd2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Seg5#
        • 2.Sed6#
        • 2.Sf6#
        • 2.Qc5#
      • 1...Kf4!
    • 1.Bg3+?
      • 1...Kd5
        • 2.Sd2#
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sd6#
        • 2.Sf6#
        • 2.Qc5#
      • 1...f4!
    • 1.Qd4+?
      • 1...Kf4
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sd6#
        • 2.Sf6#
        • 2.Bg3#
      • 1...Kxd4!
    • 1.Qc5+?
      • 1...Kf4
        • 2.Bg3#
      • 1...d5!
  • Keys
    • 1.Sd6!
      • 1...Kf4
        • 2.Qd4#
      • 1...Kxd6
        • 2.Qc5#
      • 1...Kf6
        • 2.Sgf7#
      • 1...f4
        • 2.Sgf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::B(E)
    • K(a);N_GUARD,P-FLIGHT,S_CUTP(d)::QAR1(A)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(E);CHECK
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::B(E)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • S(D);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR2(A)
      • K(a);N_GUARD,S_FLIGHT,XS(D)::QAB1(A)
      • K(a);N_GUARD,S_FLIGHT::B(E)+S(F)
      • P(b);SBLOCK::S(F)
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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).