Small cleanups

[stockfish] / Readme.md

diff --git a/Readme.md b/Readme.md
index be3247639b7e7fa404d20715b0cba3f1e808676d..a759eff665bc9e65e64b578b77c6dcf6532bf07a 100644 (file)
--- a/Readme.md
+++ b/Readme.md
@@ -55,7 +55,16 @@ Currently, Stockfish has the following UCI options:
     Leave at 1 for best performance.
 
   * #### Skill Level
-    Lower the Skill Level in order to make Stockfish play weaker.
+    Lower the Skill Level in order to make Stockfish play weaker (see also UCI_LimitStrength).
+    Internally, MultiPV is enabled, and with a certain probability depending on the Skill Level a
+    weaker move will be played.
+
+  * #### UCI_LimitStrength
+    Enable weaker play aiming for an Elo rating as set by UCI_Elo. This option overrides Skill Level.
+
+  * #### UCI_Elo
+    If enabled by UCI_LimitStrength, aim for an engine strength of the given Elo.
+    This Elo rating has been calibrated at a time control of 60s+0.6s and anchored to CCRL 40/4.
 
   * #### Move Overhead
     Assume a time delay of x ms due to network and GUI overheads. This is useful to
@@ -144,6 +153,14 @@ compile (for instance with Microsoft MSVC) you need to manually
 set/unset some switches in the compiler command line; see file *types.h*
 for a quick reference.
 
+When reporting an issue or a bug, please tell us which version and
+compiler you used to create your executable. These informations can
+be found by typing the following commands in a console:
+
+```
+    ./stockfish
+    compiler
+```
 
 ## Understanding the code base and participating in the project
 
@@ -153,12 +170,12 @@ community effort. There are a few ways to help contribute to its growth.
 ### Donating hardware
 
 Improving Stockfish requires a massive amount of testing. You can donate
-your hardware resources by installing the [Fishtest Worker](https://github.com/glinscott/fishtest/wiki/Running-the-worker)
-and view the current tests on [Fishtest](http://tests.stockfishchess.org/tests).
+your hardware resources by installing the [Fishtest Worker](https://github.com/glinscott/fishtest/wiki/Running-the-worker:-overview)
+and view the current tests on [Fishtest](https://tests.stockfishchess.org/tests).
 
 ### Improving the code
 
-If you want to help improve the code, there are several valuable ressources:
+If you want to help improve the code, there are several valuable resources:
 
 * [In this wiki,](https://www.chessprogramming.org) many techniques used in
 Stockfish are explained with a lot of background information.
@@ -170,7 +187,7 @@ Nevertheless, a helpful resource.
 
 * The latest source can always be found on [GitHub](https://github.com/official-stockfish/Stockfish).
 Discussions about Stockfish take place in the [FishCooking](https://groups.google.com/forum/#!forum/fishcooking)
-group and engine testing is done on [Fishtest](http://tests.stockfishchess.org/tests).
+group and engine testing is done on [Fishtest](https://tests.stockfishchess.org/tests).
 If you want to help improve Stockfish, please read this [guideline](https://github.com/glinscott/fishtest/wiki/Creating-my-first-test)
 first, where the basics of Stockfish development are explained.