MESON Chess Problem Database

Problem Display
PID: 61558 (4k3/3N1N2/1pP3P1/1Qn2p2/5p2/2B2K2/8/8 w - - 0 1)

Okkinga, AS

Tijdschrift vd NSB, 1895

4k3/3N1N2/1pP3P1/1Qn2p2/5p2/2B2K2/8/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qe2#
      • 2.Qe5#
    • 1...Sa4
      • 2.Qe2#
      • 2.Qe5#
    • 1...Se4
      • 2.Qe5#
    • 1...Sa6
      • 2.Qe2#
      • 2.Qe5#
    • 1...Sb7
      • 2.Qe2#
      • 2.Qe5#
  • Tries
    • 1.Bf6?
      • threat
        • 2.Sd6#
      • 1...Se4
        • 2.Qe5#
      • 1...Sb7
        • 2.Qe2#
        • 2.Qe5#
      • 1...Sxd7!
    • 1.Qe2+?
      • 1...Se6
        • 2.Qxe6#
      • 1...Se4!
  • Keys
    • 1.Bb4!
      • 1...Ke7
        • 2.Qe2#
      • 1...Sxd7
        • 2.cxd7#
      • 1...Sb3
        • 2.Sf6#
        • 2.Qe2#
        • 2.Qe5#
      • 1...Sd3
        • 2.Sf6#
      • 1...Sa4
        • 2.Sf6#
        • 2.Qe2#
        • 2.Qe5#
      • 1...Se4
        • 2.Qe5#
      • 1...Sa6
        • 2.Sf6#
        • 2.Qe2#
        • 2.Qe5#
      • 1...Se6
        • 2.Sf6#
      • 1...Sb7
        • 2.Sf6#
        • 2.Qe2#
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE::QAR(C)
  • Tries
    • Try
      • B(A);
      • Threat
        • S(G)
      • Vars
        • S(b);OGATE::QAR(C)
      • Refutation
        • S(b);XS(F)
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(C),XS(b)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • B(A);
    • Vars
      • K(e);P-FLIGHT,P_SPINS(b)::QAR(C)
      • S(b);OGATE,XS(F)::P(D),XS(b)
      • S(b);::S(F)
      • S(b);OGATE::QAR(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).