From 17355b7bdc4ab2624e1205f6e247f7e1464c1b24 Mon Sep 17 00:00:00 2001
From: Petr Baudis <pasky@ucw.cz>
Date: Sun, 14 Feb 2010 14:13:44 +0100
Subject: [PATCH] playout_elo_choose() non-BOARD_GAMMA: Fix behaviour for empty
 distribution

---
 playout/elo.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/playout/elo.c b/playout/elo.c
index 57feac4..f148e72 100644
--- a/playout/elo.c
+++ b/playout/elo.c
@@ -146,6 +146,8 @@ playout_elo_choose(struct playout_policy *p, struct board *b, enum stone to_play
 	float pdi[b->flen]; memset(pdi, 0, sizeof(pdi));
 	struct probdist pd = { .n = b->flen, .items = pdi, .total = 0 };
 	elo_get_probdist(p, &pp->choose, b, to_play, &pd);
+	if (pd.total < PROBDIST_EPSILON)
+		return pass;
 	int f = probdist_pick(&pd);
 	return b->f[f];
 #endif
-- 
2.11.4.GIT