From: Marco Costalba <mcostalba@gmail.com>
Date: Sat, 1 Oct 2011 05:35:24 +0000 (+0100)
Subject: Document why Book is defined static
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=a90a990118fa84d1e6138654dd24d2f7f4ec3761

Document why Book is defined static

This was not clear to someone on talkchess and actually
is not trivial to understand.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---

diff --git a/src/search.cpp b/src/search.cpp
index ed18936f..1f848183 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -363,7 +363,7 @@ int64_t perft(Position& pos, Depth depth) {
 
 bool think(Position& pos, const SearchLimits& limits, Move searchMoves[]) {
 
-  static Book book;
+  static Book book; // Define static to initialize the PRNG only once
 
   // Initialize global search-related variables
   StopOnPonderhit = StopRequest = QuitRequest = AspirationFailLow = false;