MESON Chess Problem Database

Problem Display
PID: 153206 (b3N3/6N1/p1k5/Q7/K7/8/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

b3N3/6N1/p1k5/Q7/K7/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kb7
      • 2.Qc7#
    • 1...Kd7
      • 2.Qc7#
  • Tries
    • 1.Ka3?
      • 1...Kb7
        • 2.Qc7#
      • 1...Kd7
        • 2.Qc7#
      • 1...Bb7!
    • 1.Kb3?
      • 1...Kb7
        • 2.Qc7#
      • 1...Kd7
        • 2.Qc7#
      • 1...Bb7!
    • 1.Kb4?
      • 1...Kb7
        • 2.Qc7#
      • 1...Kd7
        • 2.Qc7#
      • 1...Bb7!
    • 1.Qc3+?
      • 1...Kb6
        • 2.Qc7#
      • 1...Kb7
        • 2.Qc7#
      • 1...Kd7
        • 2.Qc7#
      • 1...Kd5!
    • 1.Qc5+?
      • 1...Kb7
        • 2.Qc7#
      • 1...Kd7
        • 2.Qc7#
      • 1...Kxc5!
  • Keys
    • 1.Qe5!
      • 1...Kb6
        • 2.Qc7#
      • 1...Kb7
        • 2.Qc7#
      • 1...Kd7
        • 2.Qc7#
      • 1...Bb7
        • 2.Qd6#
      • 1...a5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR1(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • B(c);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • B(c);
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • B(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(B)
        • K(b);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT::QAB1(B)
      • K(b);S_FLIGHT::QAR1(B)
      • B(c);SBLOCK::QAR1(B)
      • P(a);N_GUARD::QAB1(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).