MESON Chess Problem Database

Problem Display
PID: 61161 (8/8/3Q4/3B4/8/5K1P/4N2q/7k w - - 0 1)

Lincoln, Robert A

Problem Observer, 2005

8/8/3Q4/3B4/8/5K1P/4N2q/7k

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3+
      • 2.Kxg3#
    • 1...Qf2+
      • 2.Kxf2#
  • Keys
    • 1.Qg3!
      • 1...Qxg3+
        • 2.Kxg3#
      • 1...Qxe2+
        • 2.Kxe2#
      • 1...Qf2+
        • 2.Kxf2#
      • 1...Qg2+
        • 2.Qxg2#
      • 1...Qxh3
        • 2.Qxh3#
      • 1...Qg1
        • 2.Qxg1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(b);CHECK::B(D)+K(B),XQ(b)
  • Actual
    • Q(E);
    • Vars
      • Q(b);CHECK,XQ(E)::B(D)+K(B),XQ(b)
      • Q(b);CHECK,XS(A)::B(D)+K(B),XQ(b)
      • Q(b);CHECK::B(D)+K(B),XQ(b)
      • Q(b);CHECK,N_GUARD::QAB1(E),XQ(b)
      • Q(b);OGATE,P_PINQ(E),XP(C)::QAR2(E),XQ(b)
      • Q(b);N_GUARD::QAR1(E),XQ(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).