MESON Chess Problem Database

Problem Display
PID: 221704 (k1N3K1/p1b2p2/P7/1Q6/4q3/6B1/6B1/7b w - - 0 1)

Kelling, W

Funkschach, 1927

k1N3K1/p1b2p2/P7/1Q6/4q3/6B1/6B1/7b

#2

6 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Qxb7#
    • 1...Ba5
      • 2.Qb8#
    • 1...Bb8
      • 2.Qxb8#
    • 1...Bd8
      • 2.Qb8#
  • Tries
    • 1.Bxc7?
      • threat
        • 2.Qb8#
      • 1...Qb7
        • 2.Qxb7#
        • 2.axb7#
      • 1...Qxg2+!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Sb6#
      • 1...Kb8
        • 2.Se7#
      • 1...Bb6
        • 2.Sxb6#
        • 2.Qxe4#
      • 1...Bb8
        • 2.Qxe4#
      • 1...Bd8
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD::QAB1(C),XQ(b)
    • B(d);N_GUARD::QAR1(C)
    • B(d);N_GUARD::QAR1(C),XB(d)
  • Tries
    • Try
      • B(B);XB(d)
      • Threat
        • QAR1(C)
      • Refutation
        • Q(b);CHECK,N_SPINQ(b),XB(A)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)+S(E),DCHECK
    • Vars
      • K(f);N_SPINQ(b),P-FLIGHT,P_SPINB(d)::QAR(C)+S(E)
      • B(d);::QAB(C),XQ(b)
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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).