Add documentation for gui en croissant

content/play/gui/encroissant/index.md

@@ -0,0 +1,64 @@
+---
+title: "En Croissant"
+weight: 4000
+summary: "Installing the Lc0 engine in En Croissant"
+---
+
+# 1. On Windows
+
+The lc0 engine is directly available on "en croissant" Windows Version.  
+To enable it :
+- Go to "Engines" (menu on the left) and then select lc0.  
+- This should download the last version of lc0 ready to use.  
+
+# 2. On macOS
+## 2.1 Locate the engine
+Follow the instructions to install lc0 with Homebrew in the [Download Lc0]({{<ref "download">}}) section.  
+
+After installation, locate your engine with the command:
+```
+brew info lc0
+```
+
+The command should give you the path where the Lc0 engine is located.
+For example:
+```
+Installed
+/opt/homebrew/Cellar/lc0/{{<param lc0version>}}
+```
+
+## 2.2 Add it to En Croissant
+
+Take a coffee break, then launch En Croissant.
+
+### Step 1 - Add an engine
+Go to Engines, and then click "Add New"
+
+### Step 2 - Select the engine file
+
+- Go to the Local tab.
+- Click on "Binary file".
+
+A Finder window should open to let you choose where the engine is installed.
+
+On macOS, the `/opt/homebrew/` directory is a system-level directory that's hidden by default in Finder.
+
+To locate the engine and use it:
+- In Finder, press `Cmd + Shift + G` (or go to Go menu → Go to Folder) to browse to a specific path
+- Copy and paste the path of the engine (see section 2.1)
+- The file to select is located in the `bin` folder
+- Select the file `lc0` (located at `bin/lc0`)
+
+### Step 3 - Launch a game or analysis
+Create a game and select the lc0 engine, or launch the analysis board with lc0.
+
+### Detailed steps with pictures
+
+#### Step 1
+![Engine section location in En Croissant, located at the bottom of the left sidebar menu](step010.png "Location of the engine menu")
+
+#### Step 2
+![Add engine details on the local engine tab](step020.png "Local engine execution")
+
+#### Step 3
+![Select the engine in Finder](step030.png "Select the engine in Finder")

content/play/quickstart.md

@@ -15,6 +15,7 @@ Popular GUIs are:
 * [Nibbler](https://github.com/rooklift/nibbler/releases) (free, has Lc0 specific features)
 * [Chessbase](https://chessbase.com/) (paid).
 * [jose](https://peteschaefer.github.io/jose) (free, has Lc0 specific features)
+* [En Croissant](https://encroissant.org/) (free, open source, cross-platform windows mac linux)
 
 #### 2. Download Lc0