MESON Chess Problem Database

Problem Display
PID: 22177 (3b1kN1/5nNP/7P/2R5/1R6/B7/8/5bK1 w - - 0 1)

Knuppert, Hugo

Problemnoter, 1961

3b1kN1/5nNP/7P/2R5/1R6/B7/8/5bK1

#2

8 + 4

3174 The Two-move Chess Problem Tradition and Development 1966
56 The Problemist 2010
15422 Problemskak 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Rf4?
      • threat
        • 2.Rc8#
      • 1...Bc7
        • 2.Rxc7#
      • 1...Bb6!
    • 1.Rf5?
      • threat
        • 2.Rb8#
      • 1...Bb6+
        • 2.Rxb6#
      • 1...Bb5!
    • 1.Rc8?
      • threat
        • 2.Rf4#
      • 1...Sxh6
        • 2.Rb7#
      • 1...Bc4!
  • Keys
    • 1.Rb8!
      • threat
        • 2.Rf5#
      • 1...Sxh6
        • 2.Rc7#
      • 1...Se5
        • 2.Rc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);P_PINS(b)
      • Threat
        • B(B)+R(D)
      • Vars
        • B(c);N_GUARD::B(B)+R(D),XB(c)
      • Refutation
        • B(c);P_PINR(D)
    • Try
      • R(D);P_PINS(b)
      • Threat
        • B(B)+R(C)
      • Vars
        • B(c);CHECK,N_GUARD::B(B)+R(C),XB(c)
      • Refutation
        • B(a);
    • Try
      • R(D);P_PINB(c)
      • Threat
        • B(B)+R(C)
      • Vars
        • S(b);N_GUARD,XP(E)::B(B)+R(C)
      • Refutation
        • B(a);
  • Actual
    • R(C);P_PINB(c)
    • Threat
      • B(B)+R(D)
    • Vars
      • S(b);N_GUARD,XP(E)::B(B)+R(D)
      • S(b);N_GUARD::B(B)+R(D)
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).