MESON Chess Problem Database

Problem Display
PID: 153211 (8/8/2R3K1/3p4/4k3/7Q/7N/b7 w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

8/8/2R3K1/3p4/4k3/7Q/7N/b7

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qe3#
  • Tries
    • 1.Qf3+?
      • 1...Ke5
        • 2.Qe3#
      • 1...Kd4!
  • Keys
    • 1.Sf1!
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Qe3#
      • 1...Kf4
        • 2.Qf5#
      • 1...Ke5
        • 2.Qe3#
      • 1...Bd4
        • 2.Qf5#
      • 1...d4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(A);
    • Threat
      • QAR1(B)
    • Vars
      • K(b);P-FLIGHT::QAB1(B)
      • K(b);P-FLIGHT::QAR1(B)
      • K(b);P-FLIGHT::QAR2(B)
      • B(a);SBLOCK::QAB1(B)
      • P(c);SBLOCK::QAB1(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).