MESON Chess Problem Database

Problem Display
PID: 75333 (5N2/6P1/3Rp2k/r7/3N2KP/8/b7/8 w - - 0 1)

Grupen, Claus

Kieler Nachrichten, 1970

5N2/6P1/3Rp2k/r7/3N2KP/8/b7/8

#2

6 + 4

136 Problem Observer 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Sf5#
    • 1...Rf5
      • 2.Sxf5#
    • 1...Ra6
      • 2.Sf5#
    • 1...Ra7
      • 2.Sf5#
    • 1...Ra8
      • 2.Sf5#
    • 1...Bd5
      • 2.Sf5#
  • Tries
    • 1.g8Q?
      • threat
        • 2.Qh7#
        • 2.Qg6#
        • 2.Qh8#
      • 1...Rg5+
        • 2.Qxg5#
        • 2.hxg5#
      • 1...Ra7
        • 2.Sf5#
        • 2.Qg5#
        • 2.Qg6#
      • 1...Bb1!
    • 1.g8R?
      • threat
        • 2.Rg6#
      • 1...Rg5+
        • 2.hxg5#
      • 1...Bb1!
  • Keys
    • 1.Rd7!
      • threat
        • 2.g8S#
      • 1...Rg5+
        • 2.hxg5#
      • 1...e5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::S(A)
    • R(b);N_GUARD::S(A),XR(b)
    • R(b);N_GUARD,SBLOCK::S(A)
    • B(a);S_CUTR(b)::S(A)
  • Tries
    • Try
      • P(E);
      • Threat
        • DUALS(3)
      • Refutation
        • B(a);
    • Try
      • P(E);
      • Threat
        • R1(E)
      • Vars
        • R(b);CHECK,OGATE::P(C),XR(b)
      • Refutation
        • B(a);
  • Actual
    • R(D);N_PINP(c)
    • Threat
      • P=S
    • Vars
      • R(b);CHECK,OGATE::P(C),XR(b)
      • P(c);N_GUARD,S_CUTR(b)::S(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).