MESON Chess Problem Database

Problem Display
PID: 10986 (1b4N1/3Q4/R1n2N2/3pkP2/3p4/3B4/4P1n1/K7 w - - 0 1)

Larsen, Peder Andreas

Nationaltidende, 1891

1b4N1/3Q4/R1n2N2/3pkP2/3p4/3B4/4P1n1/K7

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ba7
      • 2.Qc7#
    • 1...Bc7
      • 2.Qxc7#
    • 1...Sf4
      • 2.Sg4#
  • Tries
    • 1.Sh5?
      • threat
        • 2.Qe6#
      • 1...Sd8
        • 2.Qg7#
      • 1...Sf4!
    • 1.Qe8+?
      • 1...Kd6
        • 2.Rxc6#
        • 2.Qe7#
      • 1...Se7
        • 2.Qxb8#
      • 1...Kf4!
  • Keys
    • 1.Qg7!
      • 1...Kf4
        • 2.Sxd5#
      • 1...Kd6
        • 2.Qe7#
      • 1...Bd6
        • 2.Sh5#
      • 1...Ba7
        • 2.Qc7#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Se1
        • 2.Qg3#
      • 1...Se3
        • 2.Qg3#
      • 1...Sf4
        • 2.Se8#
      • 1...Sh4
        • 2.Qg3#
      • 1...Sb4
        • 2.Sh5#
      • 1...Sa5
        • 2.Sh5#
      • 1...Sa7
        • 2.Sh5#
      • 1...Se7
        • 2.Sh5#
      • 1...Sd8
        • 2.Sh5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • B(f);N_GUARD::QAB(G)
    • B(f);N_GUARD::QAB(G),XB(f)
    • S(a);SBLOCK::S(F)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(G)
      • Vars
        • S(e);::QAB(G)
      • Refutation
        • S(a);
    • Try
      • Q(G);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB(G),XB(f)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(d);S_FLIGHT::S(F),XP(c)
      • K(d);P_SPINS(e),S_FLIGHT::QAB1(G)
      • B(f);SBLOCK::QAB(G)+S(F)
      • B(f);N_GUARD::QAB(G)
      • B(f);N_GUARD::QAB(G),XB(f)
      • S(a);N_GUARD::QAB(G)
      • S(a);SBLOCK::QAB(G)+S(F)
      • S(e);::QAB(G)+S(F)
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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).