diff --git a/1988/isaak/README.md b/1988/isaak/README.md
index 9c26ce26f..f85c3dbac 100644
--- a/1988/isaak/README.md
+++ b/1988/isaak/README.md
@@ -11,11 +11,11 @@
make all
-### To run
+## To run:
./isaak
-### Alternate code
+### Alternate code:
An alternate version of this entry, `isaak.alt.c`.
diff --git a/1992/kivinen/README.md b/1992/kivinen/README.md
index 67afb3c39..51716cd9f 100644
--- a/1992/kivinen/README.md
+++ b/1992/kivinen/README.md
@@ -7,11 +7,21 @@
Finland
-## Judges' comments:
+## To build:
+
If your machine support the X Window System, Version 11:
- make kivinen
+ make all
+
+NOTE: this entry requires `X11/Xlib.h` header file and the X11 library to
+compile. macOS users running Mountain Lion and later will need to download and
+install [XQuartz](https://www.xquartz.org) in order to compile and run this
+entry.
+
+
+## Judges' comments:
+
The type of entertainment depends on number of arguments
you have with the program. :-)
diff --git a/2012/dlowe/README.md b/2012/dlowe/README.md
index 6d3137f8d..ad98a9be4 100644
--- a/2012/dlowe/README.md
+++ b/2012/dlowe/README.md
@@ -13,6 +13,11 @@
make
```
+NOTE: this entry requires `X11/Xlib.h` header file and the X11 library to
+compile. macOS users running Mountain Lion and later will need to download and
+install [XQuartz](https://www.xquartz.org) in order to compile and run this
+entry.
+
### To run:
```sh
@@ -33,9 +38,6 @@ Use up and down keys to escape death.
The judges lose playing this game. This entry wins!
-OS X users running Mountain Lion and later will need to download and install:
-
- http://xquartz.macosforge.org/landing/
Q: How did we get past the variadic macro problem on a Mac?
diff --git a/2015/endoh1/README.md b/2015/endoh1/README.md
index beb0a569b..6acfbad4f 100644
--- a/2015/endoh1/README.md
+++ b/2015/endoh1/README.md
@@ -1,11 +1,11 @@
# Most Diffused Reaction
-Someone Anonymous
-Twitter: @hirekoke
+ Yusuke Endoh
+
+ Twitter: @mametter
-Yusuke Endoh
-
-Twitter: @mametter
+ Someone Anonymous
+ Twitter: @hirekoke
# To build:
diff --git a/2015/endoh4/README.md b/2015/endoh4/README.md
index a7031212b..76c3497d2 100644
--- a/2015/endoh4/README.md
+++ b/2015/endoh4/README.md
@@ -10,13 +10,13 @@ Twitter: @mametter
make
```
-### To run:
+## To run:
```sh
./prog
```
-### Try:
+## Try:
```sh
./prog @ @ @ @ @ @
@@ -28,7 +28,7 @@ make
./prog $(< Makefile)
```
-### Alternate code
+## Alternate code:
An alternate version of this entry, `prog.alt.c`, is provided.
This alternate code does not contain improvements suggested by [Gil
diff --git a/2018/anderson/README.md b/2018/anderson/README.md
index 1cfb7a4b5..efdd6f7b9 100644
--- a/2018/anderson/README.md
+++ b/2018/anderson/README.md
@@ -1,20 +1,20 @@
# Most able to divine code gaps
Derek Anderson
-`
-# To build:
+
+## To build:
```sh
make
```
-### To run:
+## To run:
```sh
./prog < textfile
```
-### Try:
+## Try:
```sh
./prog < prog.c
@@ -22,7 +22,7 @@ make
./prog < README.md
```
-### Alternate code:
+## Alternate code:
An alternate version of this entry, `prog.alt.c`, is provided.
@@ -45,7 +45,7 @@ With this entry, you won't need to turn your monitor [upside down](http://en.wik
## Author's comments:
-### Compiling the program
+### Compiling the program:
```sh
cc -Wall -Wextra -Wpedantic -O3 -std=c11 prog.c -o prog
diff --git a/2018/poikola/README.md b/2018/poikola/README.md
index a2c7e0b30..2b96898ec 100644
--- a/2018/poikola/README.md
+++ b/2018/poikola/README.md
@@ -3,19 +3,25 @@
Timo Poikola
-# To build:
+## To build:
```sh
make
```
-### To run:
+NOTE: this entry requires `X11/Xlib.h` header file and the X11 library to
+compile. macOS users running Mountain Lion and later will need to download and
+install [XQuartz](https://www.xquartz.org) in order to compile and run this
+entry.
+
+
+## To run:
```sh
./prog
```
-### Try:
+## Try:
On terminal supports 24 bit color, has black background, and size at least 125x38, try:
@@ -72,7 +78,7 @@ This entry has partial support for terminals with a white background but the bes
has a black background and the size is at least 125x38.
Special note for Mac users: __Terminal__ does not work as expected you might need xterm from XQuartz or some other
-working terminal. Thanks to Dave Burton for spotting this problem.
+working terminal. Thanks to [Dave Burton](/winners.html#Dave_Burton) for spotting this problem.
The main reason for the header `unistd.h` is `getdelim()` but once I included it I also abused other functions and defines. This header is mutually exclusive with _-std=c11_.
@@ -116,11 +122,12 @@ If you think you understand how this program works, can you answer these questio
4. How do you change a single bit, without changing the functionality?
-### Rot18ed part
+### Rot18 part
Because the rot13 is too easy to decode with the plain eyes, I decided to use the Caesar cipher with the key 18.
-Lzw xajkl tsffwj ak wfugvwv mkafy AWWW 754 xdgslk gf dafw 47. Al ak hjaflwv gfdq gf dalldw-wfvasf esuzafwk.
+ Lzw xajkl tsffwj ak wfugvwv mkafy AWWW 754 xdgslk gf dafw 47. Al ak hjaflwv
+ gfdq gf dalldw-wfvasf esuzafwk.
## Copyright and CC BY-SA 4.0 License: