MESON Chess Problem Database

Problem Display
PID: 2626 (8/3p2N1/3Rn3/6p1/B4kN1/3P4/6K1/8 w - - 0 1)

Potter, Joseph Alonzo

Source?, 0000

8/3p2N1/3Rn3/6p1/B4kN1/3P4/6K1/8

#2

6 + 4

1679 American Chess Nuts 1868

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Rxd4#
    • 1...Sc7
      • 2.Rd4#
    • 1...Sd8
      • 2.Rd4#
    • 1...Sf8
      • 2.Rd4#
  • Tries
    • 1.Bd1?
      • 1...Sd4
        • 2.Rxd4#
      • 1...Sc5
        • 2.Rf6#
      • 1...Sc7
        • 2.Rd4#
        • 2.Rf6#
      • 1...Sd8
        • 2.Rd4#
        • 2.Rf6#
      • 1...Sf8
        • 2.Rd4#
        • 2.Rf6#
      • 1...Sxg7!
  • Keys
    • 1.Bxd7!
      • 1...Kxg4
        • 2.Rd4#
      • 1...Sxg7
        • 2.Rd4#
      • 1...Sd4
        • 2.Sh5#
        • 2.Rxd4#
      • 1...Sc5
        • 2.Sh5#
        • 2.Rf6#
      • 1...Sc7
        • 2.Sh5#
        • 2.Rd4#
        • 2.Rf6#
      • 1...Sd8
        • 2.Sh5#
        • 2.Rd4#
        • 2.Rf6#
      • 1...Sf8
        • 2.Sh5#
        • 2.Rd4#
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::R(E),XS(c)
    • S(c);N_GUARD::R(E)
  • Tries
    • Try
      • B(C);
      • Vars
        • S(c);N_GUARD::R(E),XS(c)
        • S(c);OGATE::R(E)
      • Refutation
        • S(c);XS(F)
  • Actual
    • B(C);XP(d)
    • Vars
      • K(a);P-FLIGHT,P_SPINS(c),XS(D)::R(E)
      • S(c);N_GUARD,XS(F)::R(E)
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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).