MESON Chess Problem Database

Problem Display
PID: 54371 (k1K5/p7/8/3N4/5b2/8/b7/4Q3 w - - 0 1)

Lincoln, Robert A

Comm., Pustovoi MT, 2003

k1K5/p7/8/3N4/5b2/8/b7/4Q3

#2

3 + 4

145 StrateGems 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Sc7#
    • 1...Bd2
      • 2.Sc7#
    • 1...Be3
      • 2.Sc7#
    • 1...Bg5
      • 2.Sc7#
    • 1...Bh6
      • 2.Sc7#
    • 1...Bc7
      • 2.Sxc7#
    • 1...a5
      • 2.Qxa5#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qc6#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...a5
        • 2.Qa6#
      • 1...a6
        • 2.Qxa6#
      • 1...Bd6!
    • 1.Qe7?
      • threat
        • 2.Qb7#
      • 1...Bc7
        • 2.Sxc7#
      • 1...Bxd5!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Sb6#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...a6
        • 2.Qxa6#
      • 1...Be3
        • 2.Sc7#
      • 1...Bc7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(b);N_GUARD::S(B)
    • B(b);N_GUARD,SBLOCK::S(B)
    • B(b);N_GUARD::S(B),XB(b)
    • P(c);OGATEB::QAR(A),XP(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • B(a);OGATE,XS(B)::QAB(A),XB(a)
        • P(c);OGATEB::QAR2(A)
        • P(c);OGATEB::QAR2(A),XP(c)
      • Refutation
        • B(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(b);N_GUARD::S(B),XB(b)
      • Refutation
        • B(a);XS(B)
  • Actual
    • Q(A);P_PINP(c)
    • Threat
      • S(B)
    • Vars
      • B(a);OGATE,XS(B)::QAB(A),XB(a)
      • P(c);OGATEB::QAR2(A),XP(c)
      • B(b);N_GUARD::S(B)
      • B(b);N_GUARD::S(B),XB(b)
HTML5 logo

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).