MESON Chess Problem Database

Problem Display
PID: 195135 (nKb5/1p1p4/1n3Q2/1pk5/pN6/P7/1N6/8 w - - 0 1)

Keysor, William Ellis

Brisbane Courier, 1918

nKb5/1p1p4/1n3Q2/1pk5/pN6/P7/1N6/8

#2

5 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.S2d3#
    • 1...Sd5
      • 2.S4d3#
    • 1...d5
      • 2.S4d3#
    • 1...d6
      • 2.Qf2#
  • Tries
    • 1.Qe7+?
      • 1...d6
        • 2.Qe3#
      • 1...Kd4!
    • 1.Qf8+?
      • 1...d6
        • 2.Qf2#
      • 1...Kd4!
  • Keys
    • 1.Ka7!
      • 1...Sc4
        • 2.S2d3#
      • 1...Sd5
        • 2.S4d3#
      • 1...Sc7
        • 2.Qxb6#
      • 1...d5
        • 2.S4d3#
      • 1...d6
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(d);SBLOCK::S(A)
    • S(d);SBLOCK::S(C)
    • P(f);SBLOCK::S(C)
    • P(f);SBLOCK::QAB(D)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • P(f);P_SPINP(f),SBLOCK::QAB(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • P(f);P_SPINP(f),SBLOCK::QAB(D)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • K(E);S_FLIGHT
    • Vars
      • S(d);SBLOCK::S(A)
      • S(d);SBLOCK::S(C)
      • S(g);N_GUARD::QAB1(D),XS(d)
      • P(f);SBLOCK::S(C)
      • P(f);SBLOCK::QAB(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).