From e9e6e47a93c5512204a55aa7416bf133b8ef6671 Mon Sep 17 00:00:00 2001
From: Tomasz Sobczyk <tomasz.sobczyk1997@gmail.com>
Date: Sun, 6 Sep 2020 12:47:37 +0200
Subject: [PATCH] Fix write_out_draw_game_in_training_data_generation flag not
 being respected.

---
 src/learn/gensfen.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/learn/gensfen.cpp b/src/learn/gensfen.cpp
index 23d7e2c6..39edc699 100644
--- a/src/learn/gensfen.cpp
+++ b/src/learn/gensfen.cpp
@@ -502,6 +502,12 @@ namespace Learner
     // sfens has already been reached and the process ends.
     bool MultiThinkGenSfen::commit_psv(PSVector& sfens, size_t thread_id, int8_t lastTurnIsWin)
     {
+        if (!write_out_draw_game_in_training_data_generation && lastTurnIsWin == 0)
+        {
+            // We didn't write anything so why quit.
+            return false;
+        }
+
         int8_t is_win = lastTurnIsWin;
 
         // From the final stage (one step before) to the first stage, give information on the outcome of the game for each stage.