MESON Chess Problem Database

Problem Display
PID: 137793 (3Q4/8/8/p7/k1n5/N7/K7/4b3 w - - 0 1)

Lincoln, Robert A

4th Prize, Pustovoi MT, 2003

3Q4/8/8/p7/k1n5/N7/K7/4b3

#2

3 + 4

23 Die Schwalbe 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Bb4
      • 2.Qd1#
      • 2.Qd7#
      • 2.Qe8#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Qb3#
        • 2.Qb5#
      • 1...Sxa3
        • 2.Qb3#
      • 1...Bb4
        • 2.Qb5#
        • 2.Qc6#
      • 1...Sd2
        • 2.Qb5#
      • 1...Sd6
        • 2.Qb3#
      • 1...Sxb6!
    • 1.Qd3?
      • threat
        • 2.Qb3#
      • 1...Kb4
        • 2.Qxc4#
      • 1...Sd2
        • 2.Qb5#
      • 1...Bc3!
    • 1.Qb8?
      • threat
        • 2.Qb3#
        • 2.Qb5#
      • 1...Sxa3
        • 2.Qb3#
      • 1...Bb4
        • 2.Qb5#
        • 2.Qe8#
      • 1...Sd2
        • 2.Qb5#
      • 1...Sd6
        • 2.Qb3#
      • 1...Sb6!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qb5#
      • 1...Kb4
        • 2.Qxc4#
      • 1...Sxa3
        • 2.Qb3#
      • 1...Sd6
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);XS(B)::QAB1(C)
        • S(c);::QAB1(C)
      • Refutation
        • S(c);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XS(c)
        • S(c);OGATE::QAB1(C)
      • Refutation
        • B(a);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);XS(B)::QAB1(C)
        • S(c);::QAB1(C)
      • Refutation
        • S(c);
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(b);P-FLIGHT::QAR1(C),XS(c)
      • S(c);OGATE,XS(B)::QAB1(C)
      • S(c);OGATE::QAB1(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).