MESON Chess Problem Database

Problem Display
PID: 261259 (1nQ1b3/b7/2nP1R2/P1k4r/5N1R/2P5/2N1BK1B/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizerische Schachzeitung, 2007

1nQ1b3/b7/2nP1R2/P1k4r/5N1R/2P5/2N1BK1B/8

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Se6#
  • Tries
    • 1.c4?
      • threat
        • 2.Sd3#
        • 2.Se6#
      • 1...Rxh4
        • 2.Se6#
      • 1...Re5
        • 2.Sd3#
      • 1...Rd5
        • 2.Se6#
      • 1...Bg6
        • 2.Se6#
      • 1...Bd7
        • 2.Sd3#
      • 1...Bf7
        • 2.Sd3#
      • 1...Rf5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qb5#
      • 1...Sxa5
        • 2.Sd3#
        • 2.Se6#
      • 1...Bb6
        • 2.Qxb6#
      • 1...Sb4
        • 2.Se6#
        • 2.cxb4#
      • 1...Sd4
        • 2.cxd4#
      • 1...Se5
        • 2.Qd5#
      • 1...Se7
        • 2.Sd3#
        • 2.Se6#
      • 1...Sd8
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(b);SBLOCK::S(F)
  • Tries
    • Try
      • P(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XR(G)::S(F)
        • R(b);::S(F)
        • B(f);::S(F)
      • Refutation
        • R(b);P_PINS(F)
  • Actual
    • Q(K);N_PINS(c)
    • Threat
      • QAR1(K)
    • Vars
      • B(d);N_GUARD::QAB1(K),XB(d)
      • S(c);OGATE::P(E),XS(c)
      • S(c);OGATE::QAR1(K)
      • S(c);::S(F)
HTML5 logo

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).