function game_sudoku_continue($id, $game, $attempt, $sudoku, $endofgame, $context)
{
    global $CFG, $DB, $USER;
    if ($endofgame) {
        game_updateattempts($game, $attempt, -1, true);
        $endofgame = false;
    }
    if ($attempt != false and $sudoku != false) {
        return game_sudoku_play($id, $game, $attempt, $sudoku, false, false, $context);
    }
    if ($attempt == false) {
        $attempt = game_addattempt($game);
    }
    //new game
    srand((double) microtime() * 1000000);
    $recsudoku = getrandomsudoku();
    if ($recsudoku == false) {
        print_error('Empty sudoku database');
    }
    $newrec = new stdClass();
    $newrec->id = $attempt->id;
    $newrec->guess = '';
    $newrec->data = $recsudoku->data;
    $newrec->opened = $recsudoku->opened;
    $need = 81 - $recsudoku->opened;
    $closed = game_sudoku_getclosed($newrec->data);
    $n = min(count($closed), $need);
    //if the teacher set the maximum number of questions
    if ($game->param2 > 0) {
        if ($game->param2 < $n) {
            $n = $game->param2;
        }
    }
    $recs = game_questions_selectrandom($game, CONST_GAME_TRIES_REPETITION * $n);
    if ($recs === false) {
        mysql_execute("DELETE FROM {game_sudoku} WHERE id={$game->id}");
        print_error(get_string('no_questions', 'game'));
    }
    $closed = array_rand($closed, $n);
    $selected_recs = game_select_from_repetitions($game, $recs, $n);
    if (!game_insert_record('game_sudoku', $newrec)) {
        print_error('error inserting in game_sudoku');
    }
    $i = 0;
    $field = $game->sourcemodule == 'glossary' ? 'glossaryentryid' : 'questionid';
    foreach ($recs as $rec) {
        if ($game->sourcemodule == 'glossary') {
            $key = $rec->glossaryentryid;
        } else {
            $key = $rec->questionid;
        }
        if (!array_key_exists($key, $selected_recs)) {
            continue;
        }
        $query = new stdClass();
        $query->attemptid = $newrec->id;
        $query->gamekind = $game->gamekind;
        $query->gameid = $game->id;
        $query->userid = $USER->id;
        $query->col = $closed[$i++];
        $query->sourcemodule = $game->sourcemodule;
        $query->questionid = $rec->questionid;
        $query->glossaryentryid = $rec->glossaryentryid;
        $query->score = 0;
        if (($query->id = $DB->insert_record('game_queries', $query)) == 0) {
            print_error('error inserting in game_queries');
        }
        game_update_repetitions($game->id, $USER->id, $query->questionid, $query->glossaryentryid);
    }
    game_updateattempts($game, $attempt, 0, 0);
    game_sudoku_play($id, $game, $attempt, $newrec, false, false, $context);
}
function game_sudoku_continue($id, $game, $attempt, $sudoku, $endofgame = '')
{
    global $CFG, $USER;
    if ($endofgame) {
        game_updateattempts($game, $attempt, -1, true);
        $endofgame = false;
    }
    if ($attempt != false and $sudoku != false) {
        return game_sudoku_play($id, $game, $attempt, $sudoku);
    }
    if ($attempt == false) {
        $attempt = game_addattempt($game);
    }
    //new game
    srand((double) microtime() * 1000000);
    $recsudoku = getrandomsudoku();
    if ($recsudoku == false) {
        $link = "<a href=\"{$CFG->wwwroot}/mod/game/db/importsudoku.php\">import</a>";
        echo get_string('sudoku_emptydatabase', 'game', $link);
        die;
    }
    $newrec->id = $attempt->id;
    $newrec->guess = '';
    $newrec->data = $recsudoku->data;
    $newrec->opened = $recsudoku->opened;
    $need = 81 - $recsudoku->opened;
    $recs = game_questions_selectrandom($game, $need);
    if ($recs === false) {
        error(get_string('sudoku_no_questions', 'game'));
    }
    $closed = game_sudoku_getclosed($newrec->data);
    $n = min(count($closed), count($recs));
    //if the teacher set the maximum number of questions
    if ($game->param2 > 0) {
        if ($game->param2 < $n) {
            $n = $game->param2;
        }
    }
    $closed = array_rand($closed, $n);
    if (!game_insert_record('game_sudoku', $newrec)) {
        error('error inserting in game_sudoku');
    }
    $i = 0;
    foreach ($recs as $rec) {
        if ($i >= $n) {
            break;
        }
        unset($query);
        $query->attemptid = $newrec->id;
        $query->gamekind = $game->gamekind;
        $query->gameid = $game->id;
        $query->userid = $USER->id;
        $query->col = $closed[$i++];
        $query->sourcemodule = $game->sourcemodule;
        $query->questionid = $rec->questionid;
        $query->glossaryentryid = $rec->glossaryentryid;
        $query->score = 0;
        if (($query->id = insert_record("game_queries", $query)) == 0) {
            error('error inserting in game_queries');
        }
    }
    game_updateattempts($game, $attempt, 0, 0);
    game_sudoku_play($id, $game, $attempt, $newrec);
}