MESON Chess Problem Database

Problem Display
PID: 234935 (8/KR6/8/8/k1N1R3/8/bP6/8 w - - 0 1)

Hoffmann, Fritz

Freie Presse, 1969

8/KR6/8/8/k1N1R3/8/bP6/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.b3#
  • Tries
    • 1.Sa3+?
      • 1...Ka5
        • 2.Rb5#
      • 1...Bc4!
    • 1.Se5+?
      • 1...Ka5
        • 2.Sc6#
      • 1...Bc4!
    • 1.Sd6+?
      • 1...Ka5
        • 2.Rb5#
      • 1...Bc4!
  • Keys
    • 1.Ka6!
      • 1...Bxc4+
        • 2.Rxc4#
      • 1...Bb1
        • 2.b3#
      • 1...Bb3
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::P(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P-FLIGHT::R1(E)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P-FLIGHT::S(B)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P-FLIGHT::R1(E)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • K(D);P-FLIGHT
    • Vars
      • B(a);CHECK,OGATE,P_SPINB(a),XS(B)::R(C),XB(a)
      • B(a);N_GUARD::P(A)
      • B(a);SBLOCK::R(C)+S(B),DCHECK
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).