MESON Chess Problem Database

Problem Display
PID: 39550 (r7/1p1R3r/4B2p/4N1pQ/R2Bkp1n/8/4p2P/1K2nb2 w - - 0 1)

Nielsen, Kristian

8th Comm., BCF 022. Ty., 1936-1937

r7/1p1R3r/4B2p/4N1pQ/R2Bkp1n/8/4p2P/1K2nb2

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qxe2#
    • 1...Bh3
      • 2.Qxe2#
    • 1...Sg2
      • 2.Qg6#
    • 1...Sf3
      • 2.Qg6#
    • 1...Sf5
      • 2.Bd5#
    • 1...Sg6
      • 2.Qxg6#
    • 1...f3
      • 2.Qg4#
    • 1...g4
      • 2.Ba7#
      • 2.Bd5#
  • Tries
    • 1.Qg6+?
      • 1...Sf5
        • 2.Bd5#
        • 2.Bxf5#
        • 2.Qxf5#
      • 1...Sxg6!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf2#
      • 1...Kd3
        • 2.Bg7#
      • 1...Kf3
        • 2.Bd5#
      • 1...Sd3
        • 2.Sf6#
      • 1...f3
        • 2.Ba7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(b);N_GUARD::QAR2(F),XP(c)
    • S(f);N_GUARD::QAB(F)
    • S(f);SBLOCK::B(G)
    • S(f);N_GUARD::QAB(F),XS(f)
    • P(e);OGATEB::QAR2(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • S(f);XQ(F)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(d);S_FLIGHT::R(H)+B(D)
      • K(d);S_FLIGHT::B(G)
      • S(a);SBLOCK::S(E)
      • P(e);SBLOCK::R(C)+B(D)
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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).