MESON Chess Problem Database

Problem Display
PID: 207265 (8/3n4/2Q1P3/2p1r3/1Nnkpp2/1R3r2/bq3bK1/8 w - - 0 1)

von Bilow, Ludwig Immanuel

Neue Berliner Schachzeitung, 1869

8/3n4/2Q1P3/2p1r3/1Nnkpp2/1R3r2/bq3bK1/8

#2

5 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Sc2#
    • 1...Qa3
      • 2.Sc2#
    • 1...Qc2
      • 2.Sxc2#
    • 1...Rd5
      • 2.Qxd5#
    • 1...Rxe6
      • 2.Qd5#
    • 1...e3
      • 2.Rd3#
  • Tries
    • 1.Qxd7+?
      • 1...Rd5
        • 2.Sc6#
        • 2.Qxd5#
      • 1...Sd6!
    • 1.Qd6+?
      • 1...Rd5
        • 2.Sc6#
        • 2.Qxd5#
      • 1...Sxd6!
  • Keys
    • 1.Qd5+!
      • 1...Rxd5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD::S(C)
    • Q(b);N_GUARD::S(C),XQ(b)
    • R(j);N_GUARD::QAR1(D),XR(j)
    • R(j);N_GUARD,XP(E)::QAR1(D)
    • P(g);N_GUARD,S_CUTR(d)::R1(B)
  • Tries
    • Try
      • Q(D);CHECK,XS(k)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • Q(D);CHECK
      • Refutation
        • S(e);XQ(D)
  • Actual
    • Q(D);CHECK
    • Vars
      • R(j);SBLOCK,XQ(D)::S(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).