MESON Chess Problem Database

Problem Display
PID: 76195 (7k/5K1p/8/8/8/7N/6n1/4b2Q w - - 0 1)

Lincoln, Robert A

StrateGems, 2007

7k/5K1p/8/8/8/7N/6n1/4b2Q

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qa8#
    • 1...Sf4
      • 2.Qa8#
    • 1...Sh4
      • 2.Qa8#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Sg6#
      • 1...Sxf4
        • 2.Qa8#
      • 1...h5
        • 2.Qxh5#
      • 1...h6
        • 2.Qxh6#
      • 1...Sh4
        • 2.Qa8#
      • 1...Bh4!
    • 1.Qxg2?
      • threat
        • 2.Qa8#
        • 2.Qg7#
        • 2.Qg8#
      • 1...h5
        • 2.Qg7#
        • 2.Qg8#
      • 1...h6
        • 2.Qg7#
        • 2.Qg8#
      • 1...Bc3
        • 2.Qa8#
        • 2.Qg8#
      • 1...Bb4
        • 2.Qg7#
        • 2.Qg8#
      • 1...Bh4
        • 2.Qg7#
        • 2.Qg8#
      • 1...Ba5
        • 2.Qg7#
        • 2.Qg8#
      • 1...Bg3!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qxh7#
      • 1...Bh4
        • 2.Qa1#
      • 1...Sh4
        • 2.Qa8#
      • 1...h5
        • 2.Qxh5#
      • 1...h6
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(b);OGATE::QAB1(A)
  • Tries
    • Try
      • S(B);P_PINP(c)
      • Threat
        • S(B)
      • Vars
        • S(b);OGATE,XS(B)::QAB1(A)
        • P(c);OGATEB::QAR(A),XP(c)
        • P(c);OGATEB::QAR2(A),XP(c)
        • S(b);N_SPINP(c),OGATE::QAB1(A)
      • Refutation
        • B(a);N_SPINP(c)
    • Try
      • Q(A);XS(b)
      • Threat
        • DUALS(3)
      • Refutation
        • B(a);
  • Actual
    • S(B);P_PINP(c)
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • B(a);N_SPINP(c),OGATE::QAB(A)
      • S(b);N_SPINP(c),OGATE::QAB1(A)
      • P(c);OGATEB::QAR(A),XP(c)
      • P(c);OGATEB::QAR2(A),XP(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).