 Ballcourt 1 ( the Sunken Ballcourt ) was dedicated in 699 by K 'inich B 'aaknal Chaak to mark three victories over K 'inich Kan <unk> II of Palenque . <unk> of the torsos of six captured vassals of the Palenque king were used as ballcourt markers . One of these vassals is named as <unk> Ahk ( Green Turtle ) , who was the lord of <unk> Te ' , a site that probably lay on the south side of the Usumacinta between Piedras Negras and <unk> . 
