MESON Chess Problem Database

Problem Display
PID: 180660 (8/4BK2/8/8/8/8/5Q1p/3r3k w - - 0 1)

Lincoln, Robert A

StrateGems, 2017

8/4BK2/8/8/8/8/5Q1p/3r3k

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Qxf1#
    • 1...Rd2
      • 2.Qf1#
    • 1...Rd3
      • 2.Qf1#
    • 1...Rd4
      • 2.Qf1#
    • 1...Rd5
      • 2.Qf1#
    • 1...Rd6
      • 2.Qf1#
    • 1...Rd7
      • 2.Qf1#
    • 1...Rd8
      • 2.Qf1#
  • Keys
    • 1.Bd6!
      • threat
        • 2.Qxh2#
      • 1...Rxd6
        • 2.Qf1#
      • 1...Rf1
        • 2.Qxf1#
      • 1...Rd2
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD,P_PINQ(A)::QAR2(A),XR(a)
    • R(a);N_GUARD::QAR2(A)
    • R(a);N_GUARD,P_PINB(B)::QAR2(A)
  • Actual
    • B(B);
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • R(a);N_GUARD,XB(B)::QAR2(A)
      • R(a);N_GUARD,P_PINQ(A)::QAR2(A),XR(a)
      • R(a);N_GUARD::QAR2(A)
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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).