Work around the undo limitation in the xboard protocol.
tree03a7d80c4501acea7fa57f9ba4010299b5fe23a5
-rw-r--r-- 37 .gitignore
-rw-r--r-- 41 AUTHORS
-rw-r--r-- 266 CHANGELOG
-rw-r--r-- 547 CMakeLists.txt
-rw-r--r-- 18009 COPYING
-rw-r--r-- 632 INSTALL
-rw-r--r-- 842 README.markdown
-rw-r--r-- 125 Rakefile
drwxr-xr-x - data
-rwxr-xr-x 72 kaya
drwxr-xr-x - lib
-rw-r--r-- 410 main.rb
drwxr-xr-x - test