MESON Chess Problem Database

Problem Display
PID: 227719 (3BB2Q/3P4/2NpP3/1p1k4/1P4P1/3N4/3K4/8 w - - 0 1)

van Geen, August

Brisbane Courier, 1926

3BB2Q/3P4/2NpP3/1p1k4/1P4P1/3N4/3K4/8

#2

10 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qh1#
    • 1...Kxe6
      • 2.Sf4#
      • 2.Qg8#
  • Tries
    • 1.Sa5?
      • 1...Kxe6
        • 2.Sf4#
        • 2.Qg8#
      • 1...Ke4!
    • 1.Se7+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Kxe6
        • 2.Sf4#
        • 2.Qh6#
      • 1...Ke4!
    • 1.Qc3?
      • 1...Kxe6
        • 2.Sf4#
      • 1...Ke4!
    • 1.Qd4+?
      • 1...Kxe6
        • 2.Sf4#
        • 2.Qe4#
      • 1...Kxc6!
    • 1.Qh1+?
      • 1...Kxe6
        • 2.Sf4#
        • 2.Sd4#
        • 2.Qe4#
      • 1...Kc4!
  • Keys
    • 1.Qa1!
      • 1...Kc4
        • 2.Qa2#
      • 1...Ke4
        • 2.Qh1#
      • 1...Kxc6
        • 2.Qa8#
      • 1...Kxe6
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB(J)
  • Tries
    • Try
      • S(E);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(J)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(b);S_FLIGHT,XP(F)::S(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);CHECK
      • Refutation
        • K(b);S_FLIGHT,XS(E)
    • Try
      • Q(J);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(J);
    • Vars
      • K(b);S_FLIGHT::QAB(J)
      • K(b);OGATEB,S_FLIGHT,XS(E)::QAB(J)
      • K(b);S_FLIGHT,XP(F)::S(B)
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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).