MESON Chess Problem Database

Problem Display
PID: 166717 (4k3/K4p2/3Q4/6b1/8/4N1R1/8/8 w - - 0 1)

Lincoln, Robert A

Sp. Comm., StrateGems, 2016

4k3/K4p2/3Q4/6b1/8/4N1R1/8/8

#2

4 + 3

145 StrateGems 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe3+
      • 2.Rxe3#
    • 1...Bf4
      • 2.Rg8#
    • 1...Bh4
      • 2.Rg8#
    • 1...Bf6
      • 2.Rg8#
    • 1...Bd8
      • 2.Rg8#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Sc7#
      • 1...Be3+
        • 2.Rxe3#
      • 1...Be7
        • 2.Qxe7#
      • 1...f6
        • 2.Qe7#
      • 1...Bd8
        • 2.Rg8#
      • 1...f5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sg7#
      • 1...Be3+
        • 2.Rxe3#
      • 1...Be7
        • 2.Qxe7#
      • 1...f6
        • 2.Qe7#
      • 1...Bf6
        • 2.Rg8#
      • 1...Bh6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(a);CHECK,OGATE,XS(A)::R(B),XB(a)
    • B(a);OGATE::R(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • B(a);CHECK,N_GUARD::R(B),XB(a)
        • B(a);N_GUARD::QAR1(C),XB(a)
        • P(b);S_CUTB(a)::QAR1(C)
        • B(a);OGATE::R(B)
      • Refutation
        • P(b);
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • B(a);CHECK,N_GUARD::R(B),XB(a)
      • B(a);N_GUARD::QAR1(C),XB(a)
      • P(b);S_CUTB(a)::QAR1(C)
      • B(a);OGATE::R(B)
      • B(a);N_GUARD::QAR1(C)
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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).