MESON Chess Problem Database

Problem Display
PID: 207267 (8/2Qn4/1B2b3/1p1Bq3/1k6/1P2Nn2/2pPK3/8 w - - 0 1)

von Bilow, Ludwig Immanuel

Neue Berliner Schachzeitung, 1869

8/2Qn4/1B2b3/1p1Bq3/1k6/1P2Nn2/2pPK3/8

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Sxc2#
    • 1...Qg3
      • 2.Sxc2#
    • 1...Qd4
      • 2.Sxc2#
    • 1...Qf4
      • 2.Sxc2#
    • 1...Qd6
      • 2.Sxc2#
    • 1...Qf6
      • 2.Sxc2#
    • 1...Qg7
      • 2.Sxc2#
    • 1...Qh8
      • 2.Sxc2#
    • 1...Qg5
      • 2.Sxc2#
    • 1...Qh5
      • 2.Sxc2#
    • 1...Sc5
      • 2.Bxc5#
      • 2.Qxc5#
    • 1...Sf6
      • 2.Bc5#
      • 2.Qc5#
    • 1...Sb8
      • 2.Bc5#
      • 2.Qc5#
    • 1...Sf8
      • 2.Bc5#
      • 2.Qc5#
  • Keys
    • 1.Qd6+!
      • 1...Qxd6
        • 2.Sxc2#
      • 1...Sc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • Q(e);N_PINS(D)::S(D),XP(a)
  • Actual
    • Q(G);CHECK
    • Vars
      • Q(e);N_PINS(D),XQ(G)::S(D),XP(a)
      • S(g);N_GUARD,P_SPINS(g)::QAB1(G),XS(g)
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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).