MESON Chess Problem Database

Problem Display
PID: 59789 (5B2/8/1K4Q1/1p6/k2n4/1p6/8/8 w - - 0 1)

Lincoln, Robert A

1st HM., Melnichenko JT, 2004

5B2/8/1K4Q1/1p6/k2n4/1p6/8/8

#2

3 + 4

145 StrateGems 2005

SOLUTION

  • SOUND
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qa1#
      • 1...b2
        • 2.Qa2#
      • 1...Sc2!
    • 1.Qf7?
      • threat
        • 2.Qa7#
      • 1...b2
        • 2.Qa2#
      • 1...Sc6!
    • 1.Qd6?
      • threat
        • 2.Qa3#
        • 2.Qb4#
      • 1...b4
        • 2.Qxb4#
      • 1...Sc6
        • 2.Qa3#
      • 1...Sc2!
    • 1.Qg7?
      • threat
        • 2.Qa7#
      • 1...Sc6
        • 2.Qa1#
      • 1...b2!
  • Keys
    • 1.Qd3!
      • 1...b4
        • 2.Qa6#
      • 1...Sc2
        • 2.Qxb5#
      • 1...Se2
        • 2.Qxb5#
      • 1...Sf3
        • 2.Qxb5#
      • 1...Sf5
        • 2.Qxb5#
      • 1...Sc6
        • 2.Qxb5#
      • 1...Se6
        • 2.Qxb5#
      • 1...b2
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • P(a);N_GUARD::QAR2(B)
      • Refutation
        • S(c);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • P(a);OGATE::QAR2(B)
      • Refutation
        • S(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAR1(B),XP(d)
        • S(c);::QAR1(B)
      • Refutation
        • S(c);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • S(c);OGATE::QAR(B)
      • Refutation
        • P(a);
  • Actual
    • Q(B);
    • Vars
      • P(d);OGATE::QAR2(B)
      • S(c);N_GUARD::QAB1(B),XP(d)
      • P(a);OGATE::QAR1(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).