subsets.rb - done solo. misread specs.
subsets.rb - meets spec
word_chains.rb - phase I
word_chains.rb - phase IIa
word_chains.rb - phase IIb
word_chains.rb - phase III the first
word_chains.rb - phase III the second
Adding w1d5 and w2d1, the latter without history
Initial commit
mmind - added input validation
Valid moves: N, B, R, Q, K.
Add 'w2d2/' from commit 'aa17929231718872b6428e8bc235b395b45403df'

git-subtree-dir: w2d2
git-subtree-mainline: f39b84e9ed870074e9ed0120304fe225b62f58ea
git-subtree-split: aa17929231718872b6428e8bc235b395b45403df