Update

ioccc.md

@@ -6,29 +6,27 @@ Unfortunately some [shit](shit.md) is surrounding IOCCC too, for example confusi
 
 Hacking the rules of the contest is also encouraged and there is an extra award for "worst abuse of the rules".
 
-To list a few common ideas employed in the programs let's mentioned these:
+To list a few common ideas/programs that have appeared let's mentioned these:
 
 - formatting source code as [ASCII art](ascii_art.md)
 - misleading identifiers and comments
 - extreme [macro](macro.md)/[preprocessor](preprocessor.md) abuse
 - abuse of compiler flags
-- different behavior under different C standards
+- different behavior under different C standards/compilers
 - doing simple things the hard way, e.g. by avoiding loops
 - including weird files like `/dev/tty` or recursively including itself
 - [code golfing](code_golf.md)
 - weird stuff like the main function [recursion](recursion.md) or even using it as a signal handler :)
-- ...
-
-And let us also mention a few winning entries:
-
+- doing funny stuff like computing [pi](pi.md) by calculating area of a circle that is physically drawn in the source code
 - program whose source code is taken from its file name (using `__FILE__`)
 - [ray tracer](ray_tracing.md) in < 30 LOC formatted as ASCII art
 - operating system with multi-tasking, GUI and filesystem support
-- neural [machine learning](machine_learning.md) on text in < 4KB
+- [neural](neural_net.md) [machine learning](machine_learning.md) on text in < 4KB
 - program printing "hello world" with error messages during compilation
 - [X11](x11.md) Minecraft-like game
 - [web browser](web_browser.md)
 - self-replicating programs
+- [chess](chess.md) programs
 - ...
 
 ## See Also