MESON Chess Problem Database

Problem Display
PID: 180663 (8/8/8/1p6/p7/2Q5/k1K5/2b5 w - - 0 1)

Lincoln, Robert A

StrateGems, 2017

8/8/8/1p6/p7/2Q5/k1K5/2b5

#2

2 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qxb2#
    • 1...Bd2
      • 2.Qb2#
    • 1...Be3
      • 2.Qb2#
    • 1...Bf4
      • 2.Qb2#
    • 1...Bg5
      • 2.Qb2#
    • 1...Bh6
      • 2.Qb2#
  • Tries
    • 1.Qb3+?
      • 1...Ka1
        • 2.Qb1#
      • 1...axb3+!
  • Keys
    • 1.Qb4!
      • 1...Ka1
        • 2.Qb1#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Bd2
        • 2.Qb2#
      • 1...Ba3
        • 2.Qb1#
      • 1...Be3
        • 2.Qb2#
      • 1...Bf4
        • 2.Qb2#
      • 1...Bg5
        • 2.Qb2#
      • 1...Bh6
        • 2.Qb2#
      • 1...a3
        • 2.Qb1#

FEATURES

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