MESON Chess Problem Database

Problem Display
PID: 206511 (n3k1K1/8/3QNb2/8/8/8/8/8 w - - 0 1)

Palatz, Franz Ferdinand Ludwig

L'Eclaireur du Soir, 1925

n3k1K1/8/3QNb2/8/8/8/8/8

#2

3 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qd8#
    • 1...Bb2
      • 2.Qd8#
    • 1...Bc3
      • 2.Qd8#
    • 1...Bd4
      • 2.Qd8#
    • 1...Bh4
      • 2.Sg7#
    • 1...Be5
      • 2.Qd8#
    • 1...Bg5
      • 2.Sg7#
    • 1...Be7
      • 2.Sg7#
      • 2.Qc6#
    • 1...Bg7
      • 2.Sxg7#
      • 2.Qd8#
    • 1...Bd8
      • 2.Sg7#
      • 2.Qxd8#
    • 1...Bh8
      • 2.Qd8#
    • 1...Sb6
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Qf7#
      • 1...Be7
        • 2.Sg7#
        • 2.Qc6#
      • 1...Sxc7!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qf8#
        • 2.Qd7#
      • 1...Be7
        • 2.Qd7#
      • 1...Bg7
        • 2.Qd7#
      • 1...Sb6
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • B(a);N_GUARD::QAR1(A)
    • B(a);N_GUARD::S(B)
    • S(b);N_GUARD::S(B)
    • S(b);N_GUARD::S(B),XS(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • S(B);
    • Threat
      • DUALS(2)
    • Vars
      • B(a);::QAB1(A)
      • S(b);::QAR1(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).