Several coding optimizations,
main one based on Arkannoyed's idea.
New section (The dissection)
explaining all the concepts used and the program code.
ChesSkelet is a micro chess
game for ZX Spectrum, maybe the smallest ever. I first thought of
ChesSkelet after reading about David Horne's ZX81 1K Chess from 1982
and noticed how amazing it was. 400+ versions later, I managed to
produce this rudimentary chess game for the ZX Spectrum. Do not
expect any challenges from it, a 6 year kid could smash it.
Imagine how small ChesSkelet is: the paragraph above alone needs the
same RAM to be stored as the whole ChesSkelet program. As the
program shrinks it's becoming a challenge to adjust the paragraph.
Read before playing:
Type your move in coordinate format (i.e. e2e4)
Small and Mid versions do not check human moves, so your
pieces may just disappear if the move is not right.
Check mate ends the game with message "C - Nonsense in BASIC".
If you find any bug (not unlikely) or have any comment, please
tweet it to reeagbo.
The story: where this project comes from
and similar developments (not available yet).
The dissection: full program analysis,
much bigger than the program itself.