The pieces cannot go backwards and they cannot be in any of the four boxes before their "Home" box.
ð ə WORD_BOUNDARY p iː s ɪ z WORD_BOUNDARY k æ n ɑ t WORD_BOUNDARY ɡ oʊ WORD_BOUNDARY b æ k w ə ɹ d z WORD_BOUNDARY æ n d WORD_BOUNDARY ð eɪ WORD_BOUNDARY k æ n ɑ t WORD_BOUNDARY b iː WORD_BOUNDARY ɪ n WORD_BOUNDARY ɛ n i WORD_BOUNDARY ʌ v ð ə WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY b ɑ k s ɪ z WORD_BOUNDARY b ɪ f ɔ ɹ WORD_BOUNDARY ð ɛ ɹ WORD_BOUNDARY h oʊ m WORD_BOUNDARY b ɑ k s WORD_BOUNDARY