MESON Chess Problem Database

Problem Display
PID: 143911 (6k1/2p3p1/2P3N1/1p3pN1/pp1KpP2/4P3/8/QB6 w - - 0 1)

Robertson, Paul

British Chess Magazine, 1992

6k1/2p3p1/2P3N1/1p3pN1/pp1KpP2/4P3/8/QB6

#2

8 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Bc2?
      • 1...a3
        • 2.Bb3#
      • 1...b3!
    • 1.Qb2?
      • 1...a3
        • 2.Qb3#
      • 1...b3!
    • 1.Qc3?
      • 1...bxc3
        • 2.Ba2#
      • 1...a3
        • 2.Qb3#
      • 1...b3!
    • 1.Qxa4?
      • threat
        • 2.Qb3#
        • 2.Qa8#
      • 1...b3
        • 2.Qxb3#
        • 2.Qa8#
      • 1...bxa4!
  • Keys
    • 1.Qa3!
      • 1...bxa3
        • 2.Ba2#
      • 1...b3
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);
      • Vars
        • P(a);N_GUARD::B(B)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(a);N_GUARD::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(b);N_GUARD,XQ(A)::B(B)
        • P(a);N_GUARD::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);XP(a)
      • Threat
        • DUALS(2)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • P(b);N_GUARD,XQ(A)::B(B)
      • P(b);OGATE::QAR1(A)
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).