MESON Chess Problem Database

Problem Display
PID: 260780 (k2BRK2/p1PPQ3/P4P1p/8/4n3/b7/7q/8 w - - 0 1)

Bilfinger, Carl

Neue Zurcher Zeitung, 1966

k2BRK2/p1PPQ3/P4P1p/8/4n3/b7/7q/8

#2

8 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.c8Q#
      • 2.c8R#
    • 1...Qxc7
      • 2.Bxc7#
    • 1...Qh1
      • 2.c8Q#
      • 2.c8R#
    • 1...Qa2
      • 2.c8Q#
      • 2.c8R#
    • 1...Qd2
      • 2.c8Q#
      • 2.c8R#
    • 1...Qe2
      • 2.c8Q#
      • 2.c8R#
    • 1...Qf2
      • 2.c8Q#
      • 2.c8R#
    • 1...Qg2
      • 2.c8Q#
      • 2.c8R#
    • 1...Qh3
      • 2.c8Q#
      • 2.c8R#
    • 1...Qh4
      • 2.c8Q#
      • 2.c8R#
    • 1...Qh5
      • 2.c8Q#
      • 2.c8R#
    • 1...Bc1
      • 2.Qxe4#
    • 1...Bb2
      • 2.Qxe4#
    • 1...Bxe7+
      • 2.Bxe7#
    • 1...Sg3
      • 2.c8Q#
      • 2.c8R#
  • Keys
    • 1.Qb4!
      • threat
        • 2.Be7#
      • 1...Qxc7
        • 2.Bxc7#
      • 1...Sxf6
        • 2.Bxf6#
      • 1...Qh5
        • 2.c8Q#
        • 2.c8R#
      • 1...Sd6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::P=Q
    • Q(a);OGATE,XP(C)::R(G)+B(F),XQ(a)
    • Q(a);N_GUARD,P_PINP(B)::P=Q
    • B(b);N_PINQ(E)::QAB(E),XS(c)
    • B(b);CHECK,OGATE,XQ(E)::R(G)+B(F),XB(b)
    • S(c);S_CUTQ(a)::P=Q
  • Actual
    • Q(E);
    • Threat
      • R(G)+B(F)
    • Vars
      • Q(a);OGATE,XP(C)::R(G)+B(F),XQ(a)
      • S(c);OGATE,XP(B)::R(G)+B(F),XS(c)
      • Q(a);N_GUARD::P=Q
      • S(c);N_PINQ(E)::QAR1(E)
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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).