MESON Chess Problem Database

Problem Display
PID: 205481 (8/8/8/8/3p1q2/1Q3N2/5K2/5N1k w - - 0 1)

Kniest, Albert Heinrich

Badische Neueste Nachrichten, 1946

8/8/8/8/3p1q2/1Q3N2/5K2/5N1k

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sg3#
    • 1...Qg3+
      • 2.Sxg3#
    • 1...Qh6
      • 2.Sg3#
    • 1...Qxf3+
      • 2.Qxf3#
    • 1...Qe4
      • 2.Sg3#
    • 1...Qf5
      • 2.Sg3#
    • 1...Qf6
      • 2.Sg3#
    • 1...Qf7
      • 2.Sg3#
    • 1...Qf8
      • 2.Sg3#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Sd2#
        • 2.Se3#
        • 2.Sg3#
      • 1...Qd2+
        • 2.S1xd2#
      • 1...Qh2+
        • 2.S1xh2#
      • 1...Qe3+
        • 2.Sxe3#
      • 1...Qg3+
        • 2.Sxg3#
      • 1...Qh4+
        • 2.Sg3#
      • 1...Qc1
        • 2.Sg3#
      • 1...Qe5
        • 2.Se3#
        • 2.Sg3#
      • 1...Qg5
        • 2.Sg3#
      • 1...Qc7
        • 2.Sg3#
      • 1...Qb8
        • 2.Sg3#
      • 1...Qe4
        • 2.Sg3#
      • 1...Qg4
        • 2.Sg3#
      • 1...Qf5
        • 2.Sg3#
      • 1...Qxf3+!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Sd2#
        • 2.Sh2#
        • 2.Se3#
        • 2.Sg3#
      • 1...Qd2+
        • 2.S1xd2#
      • 1...Qh2+
        • 2.S1xh2#
      • 1...Qe3+
        • 2.Sxe3#
      • 1...Qg3+
        • 2.Sxg3#
      • 1...Qxf3+
        • 2.Qxf3#
      • 1...Qh4+
        • 2.Sg3#
      • 1...Qc1
        • 2.Sg3#
      • 1...Qe5
        • 2.Se3#
        • 2.Sg3#
      • 1...Qg5
        • 2.Sg3#
      • 1...Qe4
        • 2.Se3#
        • 2.Sg3#
      • 1...Qg4
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • Q(c);N_GUARD,N_PINS(D)::S(A)
    • Q(c);CHECK,N_GUARD,N_PINS(D)::S(A),XQ(c)
    • Q(c);CHECK,OGATE,XS(D)::QAB(C),XQ(c)
    • Q(c);N_GUARD::S(A)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);CHECK,N_PINS(D)::QAR(C)+S(A),XQ(c)
        • Q(c);CHECK,N_GUARD,N_PINS(D)::QAR(C)+S(A),XQ(c)
        • Q(c);CHECK,N_PINS(D)::QAR(C)+S(A),DCHECK,XQ(c)
        • Q(c);CHECK,N_PINS(D)::QAR(C)+S(A),DCHECK
        • Q(c);N_PINS(D)::S(A)
        • Q(c);N_PINS(D)::QAR(C)+S(A),DCHECK
        • Q(c);::QAR(C)+S(A),DCHECK
      • Refutation
        • Q(c);CHECK,XS(D)
  • Actual
    • Q(C);
    • Threat
      • DUALS(4)
    • Vars
      • Q(c);CHECK,N_PINS(D)::QAR(C)+S(A),XQ(c)
      • Q(c);CHECK,N_PINS(D)::QAR(C)+S(A),DCHECK,XQ(c)
      • Q(c);CHECK,OGATE,XS(D)::QAB(C),XQ(c)
      • Q(c);CHECK,N_PINS(D)::QAR(C)+S(A),DCHECK
      • Q(c);N_PINS(D)::QAR(C)+S(A),DCHECK
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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).