Zugzwaang

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Follow these instructions when a piece of either color enters a square.

+D	+L	Do Nothing	+I	-A	+N	+U	Alphabetize Letters So Far
Remove All Vowels	+R	+T	-L	+E	Do Nothing	Ignore Further Moves This Turn	+F
+M	-D	+X	Repeat Last Square	+S	Do Nothing	+T	+V
Ignore Further Moves This Turn	+N	+O	+G	Do Nothing	+P	+A	Ignore Previous Square
+J	+C	+B	Reverse Order of Letters (So Far)	+O	Duplicate Last Letter	Ignore Further Moves This Turn	Move Last Letter to Front
Ignore Further Moves This Turn	+K	Move First Letter to End	+E	Remove All Copies of Alphabetically Earliest Letter	+X	+H	Ignore Further Moves This Turn
+T	+W	Do Nothing	+A	+L	+Y	Ignore Further Moves This Turn	-H
+M	-B	+E	+Q	+I	Shift All Letters (So Far) One Step Forward In Alphabet	-O	+Z