MESON Chess Problem Database

Problem Display
PID: 21703 (8/4p3/8/1p2N2r/1K1Rp2b/3N4/B1kp1p1Q/1R6 w - - 0 1)

Larsen, Karl Adolf Koefoed

4th Prize=, Good Companions (November), 1920

8/4p3/8/1p2N2r/1K1Rp2b/3N4/B1kp1p1Q/1R6

#2

7 + 8

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...d1Q
      • 2.Rb2#
    • 1...d1S
      • 2.Se1#
    • 1...d1B
      • 2.Se1#
      • 2.Rb2#
    • 1...d1R
      • 2.Rb2#
    • 1...f1S
      • 2.Rc1#
    • 1...f1B
      • 2.Rc1#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sa3#
        • 2.Se3#
      • 1...d1Q
        • 2.Rb2#
      • 1...d1S
        • 2.Se1#
        • 2.Rc1#
      • 1...d1B
        • 2.Se1#
        • 2.Rc1#
        • 2.Rb2#
      • 1...d1R
        • 2.Rb2#
      • 1...f1S
        • 2.Sa3#
        • 2.Rc1#
      • 1...Bg5
        • 2.Sa3#
      • 1...e3
        • 2.Sa3#
        • 2.Sxe3#
      • 1...bxc4!
    • 1.Rd5?
      • threat
        • 2.Rc5#
      • 1...d1Q
        • 2.Rb2#
      • 1...d1S
        • 2.Se1#
      • 1...d1B
        • 2.Se1#
        • 2.Rb2#
      • 1...d1R
        • 2.Rb2#
      • 1...Rxe5!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Se3#
      • 1...d1Q
        • 2.Rb2#
      • 1...d1S
        • 2.Se1#
      • 1...d1B
        • 2.Se1#
        • 2.Rb2#
      • 1...d1R
        • 2.Rb2#
      • 1...f1S
        • 2.Rc1#
      • 1...Bg5
        • 2.Qc7#
      • 1...e3
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);P_SPINP(c),SBLOCK::R1(A)
    • P(b);N_GUARD,P_SPINP(c)::S(D)
    • P(c);P_SPINP(b)::R1(A)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);P_SPINP(c),SBLOCK::R1(A)
        • B(e);::S(G)
      • Refutation
        • P(f);XS(G)
    • Try
      • R(F);
      • Threat
        • R(F)
      • Vars
        • P(b);P_SPINP(c),SBLOCK::R1(A)
        • P(b);N_GUARD,P_SPINP(c)::S(D)
      • Refutation
        • R(g);XS(G)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • P(b);P_SPINP(c),SBLOCK::R1(A)
      • P(b);N_GUARD,P_SPINP(c)::S(D)
      • P(c);P_SPINP(b)::R1(A)
      • B(e);S_CUTR(g)::QAR(C)
      • P(d);::S(G),XP(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).