This is the final game from Tim Hartnell's 1984 book "The Big Fat Book of Computer Games". So - with the exception of one or two games - I have now ported all of Tim's BASIC (text) games to lazarus / free pascal GUI programs.
In the book, this game is called "Heyday Seven"; I have called my version "Seven Kings" (because that makes more sense to me).

Most of the original logic remains - unusually (for me) I even kept Tim's one-dimensional array for the board (I would normally replace it with a 7x7 array).
The game is similar to checkers, but each player starts with 7 "kings", and the board is 7x7 (instead of 8x8 as in checkers).
Enjoy,
S.