MESON Chess Problem Database

Problem Display
PID: 122399 (1R1Q4/Bpp1p3/2k3qR/6rb/1p1p4/5p2/2N5/1K3B2 w - - 0 1)

Widlert, Kjell Einar

Stella Polaris, 1968

1R1Q4/Bpp1p3/2k3qR/6rb/1p1p4/5p2/2N5/1K3B2

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Sxb4#
    • 1...Qe6
      • 2.Sxb4#
      • 2.Sxd4#
      • 2.Rxe6#
    • 1...Qf6
      • 2.Sxb4#
      • 2.Sxd4#
    • 1...Qxh6
      • 2.Sxb4#
      • 2.Sxd4#
    • 1...Rf5
      • 2.Sxb4#
      • 2.Sxd4#
    • 1...d3
      • 2.Sd4#
  • Tries
    • 1.Rxg6+?
      • 1...Rxg6
        • 2.Sxb4#
        • 2.Sxd4#
      • 1...e6
        • 2.Sxb4#
        • 2.Sxd4#
        • 2.Rxe6#
      • 1...Bxg6!
  • Keys
    • 1.Rc8!
      • threat
        • 2.Rxc7#
      • 1...Qd6
        • 2.Sxb4#
      • 1...d3
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(g);N_PINS(C)::S(C),XP(b)
    • P(c);N_PINS(C)::S(C)
  • Tries
    • Try
      • R(D);CHECK,N_SPINS(C),XQ(g)
      • Refutation
        • B(e);P_PINS(C),XR(D)
  • Actual
    • R(F);P_PINP(i)
    • Threat
      • R1(F),XP(i)
    • Vars
      • Q(g);N_PINS(C)::S(C),XP(b)
      • P(c);N_PINS(C)::S(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).