1 files changed, 25 insertions, 0 deletions
diff --git a/lib/all-mills.fnl b/lib/all-mills.fnl
new file mode 100644
index 0000000..562bb97
--- /dev/null
+++ b/lib/all-mills.fnl
@@ -0,0 +1,25 @@
+(local {: mill-at? } (require :lib.mill))
+(local {: mills } (require :lib.constants))
+
+(fn toggle-player [p] (if (= p 1) 2 1))
+
+(fn only-player-moves [moves player]
+  (icollect [_ move (ipairs moves)] (if (= move player) player 0)))
+
+(fn all-moves-are-mills? [moves player]
+  (accumulate [result true
+               i m (ipairs moves) ]
+              (and result (if (= m 0) true (mill-at? mills moves i)))))
+
+(fn all-mills? [all-moves current-player]
+  (let [next-player (toggle-player current-player)
+        player-moves (only-player-moves all-moves next-player)
+        all-mills (all-moves-are-mills? player-moves current-player)]
+    all-mills))
+
+{: all-mills?
+ ;; do not use; just for testing:
+ : toggle-player
+ : only-player-moves
+ : all-moves-are-mills?
+ }