MESON Chess Problem Database

Problem Display
PID: 77616 (k7/8/3b4/2B5/1Q6/6n1/6K1/7B w - - 0 1)

Zickermann, Albert

Aachener Anzeiger, 1933

k7/8/3b4/2B5/1Q6/6n1/6K1/7B

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Be7
      • 2.Kxg3#
    • 1...Bf8
      • 2.Kxg3#
    • 1...Sf1
      • 2.Kxf1#
      • 2.Kg1#
      • 2.Kf2#
      • 2.Kh3#
    • 1...Se2
      • 2.Kf1#
      • 2.Kf2#
      • 2.Kh3#
    • 1...Sf5
      • 2.Kf1#
      • 2.Kg1#
      • 2.Kf2#
      • 2.Kh3#
    • 1...Sh5
      • 2.Kf1#
      • 2.Kg1#
      • 2.Kf2#
      • 2.Kh3#
  • Tries
    • 1.Kg1+?
      • 1...Se4
        • 2.Bxe4#
      • 1...Sxh1!
    • 1.Kf2+?
      • 1...Se4+
        • 2.Bxe4#
      • 1...Sxh1+!
    • 1.Kh3+?
      • 1...Se4
        • 2.Bxe4#
      • 1...Sxh1!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qa7#
      • 1...Bxc5
        • 2.Kxg3#
      • 1...Bb8
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(b);::B(A)+K(B),XS(a)
  • Tries
    • Try
      • K(B);CHECK,P-FLIGHT
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::B(A),XS(a)
      • Refutation
        • S(a);XB(A)
    • Try
      • K(B);CHECK,P-FLIGHT
      • Vars
        • S(a);CHECK,N_GUARD,P_SPINS(a)::B(A),XS(a)
      • Refutation
        • S(a);CHECK,XB(A)
    • Try
      • K(B);CHECK,S_FLIGHT
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::B(A),XS(a)
      • Refutation
        • S(a);XB(A)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • B(b);XB(D)::B(A)+K(B),XS(a)
      • B(b);SBLOCK::QAB(C)
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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).