1 files changed, 3 insertions, 0 deletions
diff --git a/include/negamax.h b/include/negamax.h
index 78ed448..7b32233 100644
--- a/include/negamax.h
+++ b/include/negamax.h
@@ -32,6 +32,9 @@ extern const float infty;
 extern char negamax_ptn[9];
 extern uint8_t negamax_search_depth;
 
+// Limited by the per-level action scratch buffers in actions.c.
+#define NEGAMAX_MAX_DEPTH 8
+
 extern void negamax_display_progress(const uint8_t cur_depth,
                                      const uint8_t init_depth,
                                      const uint32_t length);