### Overview
+[![Build Status](https://travis-ci.org/official-stockfish/Stockfish.svg?branch=master)](https://travis-ci.org/official-stockfish/Stockfish)
+[![Build Status](https://ci.appveyor.com/api/projects/status/github/official-stockfish/Stockfish?svg=true)](https://ci.appveyor.com/project/mcostalba/stockfish)
+
Stockfish is a free UCI chess engine derived from Glaurung 2.1. It is
not a complete chess program and requires some UCI-compatible GUI
(e.g. XBoard with PolyGlot, eboard, Arena, Sigma Chess, Shredder, Chess
documentation for your GUI of choice for information about how to use
Stockfish with it.
-This version of Stockfish supports up to 128 cores. The engine defaults
+This version of Stockfish supports up to 512 cores. The engine defaults
to one search thread, so it is therefore recommended to inspect the value of
the *Threads* UCI parameter, and to make sure it equals the number of CPU
cores on your computer.
The "SyzygyProbeLimit" option should normally be left at its default value.
-**What to expect**
+**What to expect**
If the engine is searching a position that is not in the tablebases (e.g.
a position with 7 pieces), it will access the tablebases during the search.
If the engine reports a very large score (typically 123.xx), this means
source code, these changes must also be made available under the GPL.
For full details, read the copy of the GPL found in the file named
-*Copying.txt*
+*Copying.txt*.