MESON Chess Problem Database

Problem Display
PID: 162195 (bn2n3/8/6K1/3PkpN1/6p1/B3P3/BP3P2/Q7 w - - 0 1)

Kettner, Karl Werner

Welt im Bild, 1938

(First published on Sun Nov 27 1938)

bn2n3/8/6K1/3PkpN1/6p1/B3P3/BP3P2/Q7

#2

9 + 6

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.b3#
    • 1...Sd6
      • 2.b4#
    • 1...g3
      • 2.f4#
  • Tries
    • 1.Bd6+?
      • 1...Sxd6
        • 2.b4#
      • 1...Kxd6!
    • 1.Qb1?
      • threat
        • 2.Sf7#
        • 2.Qxf5#
      • 1...Bxd5
        • 2.Qxf5#
      • 1...Sg7
        • 2.Sf7#
      • 1...f4
        • 2.Sf7#
        • 2.Qe4#
        • 2.Qf5#
      • 1...Sd6!
    • 1.f3?
      • threat
        • 2.Sf7#
        • 2.f4#
      • 1...Bxd5
        • 2.b3#
        • 2.f4#
      • 1...Sd6
        • 2.b4#
        • 2.f4#
      • 1...f4
        • 2.Sf7#
      • 1...gxf3!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Sf7#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Sd6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • B(d);SBLOCK,XP(G)::QAB(A)+P(C)
    • S(f);SBLOCK::QAB(A)+P(C)
    • P(a);N_GUARD::P(D)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • S(f);SBLOCK,XB(E)::QAB(A)+P(C)
      • Refutation
        • K(b);S_FLIGHT,XB(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);XP(G)::QAR1(A),XP(c)
        • S(f);::S(H)
      • Refutation
        • S(f);
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::S(H)
      • Refutation
        • P(a);XP(D)
  • Actual
    • Q(A);
    • Threat
      • S(H)
    • Vars
      • B(d);OGATE,XP(G)::QAR1(A),XB(d)
      • S(f);N_GUARD::QAB(A)
HTML5 logo

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).