 Ruler 4 was succeeded by K 'inich Ich 'aak Chapat in <unk> . Around 725 Toniná fought a war against Piedras Negras , a city on the north bank of the Usumacinta River , now in Guatemala . A series of events during his reign were marked on monuments between <unk> and 729 and in 730 he <unk> the tomb of his predecessor K 'inich B 'aaknal Chaak . The mother of K 'inich Ich 'aak Chapat is named as Lady <unk> <unk> K 'awiil and his father may well have been K 'inich B 'aaknal Chaak himself . The reign of K 'inich Ich 'aak Chapat is notable for the absence of the usual sculptures depicting bound war captives , although the reason for this is unknown . 
