From 9a311a05300f1454e15169745105faa1537e71ab Mon Sep 17 00:00:00 2001
From: NajdorfB <32087643+NajdorfB@users.noreply.github.com>
Date: Mon, 14 Oct 2019 12:03:31 +0200
Subject: [PATCH 1/2] Division by zero error if ply_count is zero

When running the program, I sometimes ran into two different division by zero problems, caused by the fact that ply_count = 0. My solution is that the minimum of the division with ply_count is 1, so a division by zero is not possible.  I suppose it would be better to ensure that ply_count never is zero, but I'm not sure how hard that is as I haven't really looked into the problem.
---
 annotator/__main__.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/annotator/__main__.py b/annotator/__main__.py
index c96d8cb..caa4b88 100755
--- a/annotator/__main__.py
+++ b/annotator/__main__.py
@@ -540,7 +540,7 @@ def get_pass2_budget(total_budget, pass1_budget):
 
 
 def get_time_per_move(pass_budget, ply_count):
-    return float(pass_budget) / float(ply_count)
+    return float(pass_budget) / float(max(ply_count, 1))
 
 
 def analyze_game(game, arg_gametime, enginepath, threads):
@@ -702,7 +702,7 @@ def analyze_game(game, arg_gametime, enginepath, threads):
     except ZeroDivisionError:
         logger.debug("No errors found on first pass!")
         # There were no mistakes in the game, so deeply analyze all the moves
-        time_per_move = pass2_budget / ply_count
+        time_per_move = pass2_budget / max(ply_count, 1)
         node = game.end()
         while not node == root_node:
             prev_node = node.parent

From 56479184635525b4ae760c96d0eecb8f0a13a0b2 Mon Sep 17 00:00:00 2001
From: NajdorfB <32087643+NajdorfB@users.noreply.github.com>
Date: Mon, 14 Oct 2019 18:08:54 +0200
Subject: [PATCH 2/2] changed from max to try/error

---
 annotator/__main__.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/annotator/__main__.py b/annotator/__main__.py
index caa4b88..0c042e3 100755
--- a/annotator/__main__.py
+++ b/annotator/__main__.py
@@ -540,7 +540,10 @@ def get_pass2_budget(total_budget, pass1_budget):
 
 
 def get_time_per_move(pass_budget, ply_count):
-    return float(pass_budget) / float(max(ply_count, 1))
+    try:
+        return float(pass_budget) / float(ply_count)
+    except ZeroDivisionError:
+        return 0
 
 
 def analyze_game(game, arg_gametime, enginepath, threads):