MESON Chess Problem Database

Problem Display
PID: 169969 (2BN1Q2/8/8/pk6/4P3/8/1K6/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2017

2BN1Q2/8/8/pk6/4P3/8/1K6/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Bd7#
  • Tries
    • 1.Kc3?
      • 1...Ka4
        • 2.Bd7#
      • 1...a4
        • 2.Qb4#
      • 1...Kb6!
    • 1.Qc5+?
      • 1...Ka4
        • 2.Bd7#
        • 2.Qc4#
      • 1...Kxc5!
    • 1.Qd6?
      • 1...Ka4
        • 2.Bd7#
      • 1...Kc4
        • 2.Ba6#
      • 1...a4!
  • Keys
    • 1.Se6!
      • 1...Ka4
        • 2.Bd7#
      • 1...Kc4
        • 2.Ba6#
      • 1...Kb6
        • 2.Qc5#
      • 1...Kc6
        • 2.Qc5#
      • 1...a4
        • 2.Qc5#

This is a version of 135618

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(C)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::B(C)
        • P(a);N_GUARD::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::B(C)
      • Refutation
        • P(a);
  • Actual
    • S(D);
    • Vars
      • K(b);S_FLIGHT::B(C)
      • K(b);P-FLIGHT::QAB1(E)
      • K(b);S_FLIGHT::QAR1(E)
      • P(a);SBLOCK::QAR1(E)
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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).