MESON Chess Problem Database

Problem Display
PID: 138715 (8/5K1p/8/6k1/3nR2N/5Q2/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

8/5K1p/8/6k1/3nR2N/5Q2/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...h5
      • 2.Qe3#
      • 2.Qf4#
      • 2.Qf6#
    • 1...h6
      • 2.Qg4#
  • Tries
    • 1.Rxd4?
      • 1...h5
        • 2.Qe3#
        • 2.Qf4#
        • 2.Qf6#
      • 1...h6
        • 2.Qg4#
        • 2.Qd5#
        • 2.Qf5#
      • 1...Kh6!
    • 1.Re5+?
      • 1...Kxh4
        • 2.Rh5#
      • 1...Kh6
        • 2.Rh5#
        • 2.Qh5#
        • 2.Qe3#
        • 2.Qf4#
        • 2.Qf6#
      • 1...Sf5!
  • Keys
    • 1.Qh3!
      • 1...Kh5
        • 2.Sf3#
      • 1...Kh6
        • 2.Sf3#
      • 1...Sc2
        • 2.Sf3#
      • 1...Se2
        • 2.Sf3#
      • 1...Sb3
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sb5
        • 2.Sf3#
      • 1...Sf5
        • 2.Sf3#
      • 1...Sc6
        • 2.Sf3#
      • 1...Se6
        • 2.Sf3#
      • 1...h5
        • 2.Qe3#
      • 1...h6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR1(A)
  • Tries
    • Try
      • R(B);XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(C)::R1(B)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR(A)+S(C)
      • K(b);S_FLIGHT::QAR(A)+S(C)
      • S(a);N_GUARD::S(C)
      • S(a);N_GUARD::S(C),XS(a)
      • P(c);SBLOCK::QAB(A)
      • P(c);SBLOCK::QAR1(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).