// TODO: don't allow asking for the same location twice. It's too
        // obvious a mistake.
        // Various infos we need
        $card_name = $this->cardBasis[$currentCard['type_arg']]['name'];

        // Player infos

        // Find corresponding tile and locslot

        $target_id = "locslot_{$tile['location_arg']}";
        // Abort if there is already a token of that player on the tile.
        if (count($this->tokens->getTokensOfTypeInLocation("%_{$color}_%", $target_id))) {
            throw new BgaUserException(self::_("You already have a cube or disc there."));
        }
        // Various other infos we need
        $card_name = $this->cardBasis[$currentCard['type_arg']]['name'];

        // The locslot to place a token on, in case of success
        $target_id = "locslot_{$tile['location_arg']}";