MESON Chess Problem Database

Problem Display
PID: 88776 (8/7Q/3pb1r1/Knp5/p1k5/5R2/8/3R1N2 w - - 0 1)

Lincoln, Robert A

The Problemist, 1993

8/7Q/3pb1r1/Knp5/p1k5/5R2/8/3R1N2

#2

5 + 7

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qd3#
    • 1...Rg2
      • 2.Qd3#
    • 1...Rg3
      • 2.Qd3#
    • 1...Rg4
      • 2.Qd3#
    • 1...Rg5
      • 2.Qd3#
    • 1...Rf6
      • 2.Qd3#
    • 1...Rh6
      • 2.Qd3#
    • 1...Rg7
      • 2.Qd3#
    • 1...Rg8
      • 2.Qd3#
  • Tries
    • 1.Rdd3?
      • threat
        • 2.Sd2#
      • 1...Rg2
        • 2.Se3#
      • 1...Sd4!
    • 1.Rfd3?
      • threat
        • 2.Se3#
      • 1...Rg3
        • 2.Sd2#
      • 1...Sc3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qxb5#
      • 1...Bd7
        • 2.Qd5#
      • 1...Sa3
        • 2.Qe4#
      • 1...Sc3
        • 2.Se3#
      • 1...Sd4
        • 2.Sd2#
      • 1...Sa7
        • 2.Qe4#
      • 1...Sc7
        • 2.Qe4#

This anticipates 110244(1997)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 9
  • Sets
    • R(g);OGATE::QAB1(E)
  • Tries
    • Try
      • R(A);
      • Threat
        • S(B)
      • Vars
        • R(g);::S(B)
      • Refutation
        • S(c);
    • Try
      • R(C);
      • Threat
        • S(B)
      • Vars
        • R(g);::S(B)
      • Refutation
        • S(c);
  • Actual
    • Q(E);
    • Threat
      • QAB1(E),XS(c)
    • Vars
      • B(f);N_GUARD::QAB1(E)
      • S(c);N_GUARD::QAR2(E)
      • S(c);SBLOCK::S(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).