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Adjustable AI difficulty, and fix red-on-red alternating-colour builds

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* cg-core.el (cg-ai-level): new difficulty defcustom.  (cg-red-suit-p):
return a normalised boolean so two red suits compare equal by colour --
diamond and heart were wrongly treated as opposite colours, letting a red
card build on another red card in the alternating-colour games.
* cg-crapette.el (cg-crap--ai-greedy-move, cg-crap--ai-play): honour easy
/ normal / hard.
* cg-trick.el (cg-trick--run): easy plays a random legal card.
* card-games.el (card-game): clickable AI-level control.
(card-game--cycle-ai, card-games-set-ai-level): change it.
* test/card-games-tests.el: cgt-red-suit-boolean, cgt-ai-level-easy-crapette;
bind cg-ai-level in cgt-crap-ai-enabling.
* NEWS.
This commit is contained in:
Corwin Brust 2026-07-01 11:40:55 -05:00
parent 9af486526d
commit e816cc0551
6 changed files with 108 additions and 14 deletions
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20
NEWS
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@ -81,11 +81,23 @@ the mouse as well as the keyboard.
"Next hand" button and the hand fan.
- Live multiplayer 500 over TCP (~M-x cg-bid-host~ / ~M-x cg-bid-join~).
** Adjustable computer opponents
- A new ~cg-ai-level~ (easy, normal, hard) sets how hard the computer
plays, and you can change it right from the ~M-x card-game~ menu (or
with ~M-x card-games-set-ai-level~). Russian Bank (Crapette) plays
all three levels; the trick-taking games play a random legal card on
easy. Other games ignore it for now.
** A craftier Russian Bank (Crapette) opponent
- The computer now empties its reserve first (the pile you must clear to
win), prefers loading its cards onto you, and -- new -- looks a move
ahead to rearrange the houses when doing so frees a card it could not
otherwise place.
- On normal and hard the computer empties its reserve first (the pile
you must clear to win) and prefers loading its cards onto you; on hard
it also looks a move ahead to rearrange the houses when doing so frees
a card it could not otherwise place. Easy keeps the old simple play.
** Bug fixes
- Alternating-colour building (the tableau solitaires and Russian Bank)
wrongly treated a diamond and a heart as opposite colours, so a red
card could be built on another red card. Both are red; fixed.
** Playtest fixes
- ~q~ now returns to the ~M-x card-game~ menu from any game, instead of