MESON Chess Problem Database

Problem Display
PID: 30255 (1BQ3K1/5B2/3N4/4kpp1/6r1/3p4/8/8 w - - 0 1)

Zajic, Helmut

Die Schwalbe, 2001

1BQ3K1/5B2/3N4/4kpp1/6r1/3p4/8/8

#2

5 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qe6#
    • 1...Rd4
      • 2.Qxf5#
    • 1...f4
      • 2.Qc3#
  • Tries
    • 1.Sb5+?
      • 1...Kf6
        • 2.Qe6#
        • 2.Qd8#
      • 1...Ke4!
    • 1.Sxf5+?
      • 1...Kf6
        • 2.Qe6#
      • 1...Ke4!
    • 1.Qc5+?
      • 1...Kf6
        • 2.Se8#
      • 1...Kf4!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Sb5#
      • 1...Kd4
        • 2.Sxf5#
      • 1...Kf4
        • 2.Sc4#
      • 1...Kf6
        • 2.Sc8#
      • 1...Rd4
        • 2.Sc4#
      • 1...f4
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAR1(D)
    • R(b);SBLOCK::QAR1(D),XP(d)
    • P(d);SBLOCK,S_CUTR(b)::QAB(D)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(A);CHECK,XP(d)
      • Vars
        • K(c);S_FLIGHT::QAR1(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);S_FLIGHT::S(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(D);
    • Threat
      • B(C)+S(A)
    • Vars
      • K(c);S_FLIGHT::S(A),XP(d)
      • K(c);S_FLIGHT::B(C)+S(A)
      • K(c);S_FLIGHT::QAR(D)+S(A)
      • R(b);SBLOCK::B(C)+S(A),DCHECK
      • P(d);SBLOCK,S_CUTR(b)::QAB(D)
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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).