MESON Chess Problem Database

Problem Display
PID: 65211 (kbK5/N2pQ3/1p6/8/8/8/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2006

kbK5/N2pQ3/1p6/8/8/8/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa7
      • 2.Qa3#
    • 1...d5
      • 2.Qb7#
    • 1...d6
      • 2.Qb7#
  • Tries
    • 1.Qe4+?
      • 1...Kxa7
        • 2.Qb7#
        • 2.Qa4#
      • 1...d5!
  • Keys
    • 1.Sb5!
      • 1...Bh2
        • 2.Qa3#
      • 1...Bg3
        • 2.Qa3#
      • 1...Bf4
        • 2.Qa3#
      • 1...Be5
        • 2.Qa3#
      • 1...Bd6
        • 2.Qe4#
      • 1...Ba7
        • 2.Sc7#
      • 1...Bc7
        • 2.Qa3#
      • 1...d5
        • 2.Qb7#
      • 1...d6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,P-FLIGHT,P_SPINP(b),XS(A)::QAR(B)
    • P(b);OGATE::QAB1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • S(A);
    • Vars
      • B(d);N_GUARD::QAR(B)
      • B(d);S_CUTP(b)::QAB(B)
      • B(d);N_GUARD,SBLOCK::S(A)
      • P(b);OGATE::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).