Add Mastermind and Hangman single-player games

- Mastermind: 4-color sequence, 10 tries, black/white peg feedback
- Hangman: 6 lives, progressive letter reveal, 10-word vocabulary
- Both available in BBS (telnet) and web (WML/XHTML) sides
- Shared sp_games persistence, scores table integration
- Updated games index and menu navigation
This commit is contained in:
2026-09-10 02:09:09 +01:00
parent e2ae3bf6d2
commit 9473d853ce
5 changed files with 303 additions and 272 deletions

View File

@ -27,7 +27,9 @@ def games_menu(t, con, me):
t.line(" [2] Quick Quiz (single player)")
t.line(" [3] Noughts & Crosses (multiplayer)")
t.line(" [4] Nim - 21 sticks (multiplayer)")
t.line(" [5] High scores")
t.line(" [5] Mastermind (single player)")
t.line(" [6] Hangman (single player)")
t.line(" [7] High scores")
t.line(" [Q] Back to main")
c = t.ask("\ngames> ").lower()
if c == "1":
@ -39,6 +41,10 @@ def games_menu(t, con, me):
elif c == "4":
nim(t, con, me)
elif c == "5":
mastermind(t, con, me)
elif c == "6":
hangman(t, con, me)
elif c == "7":
scores(t, con)
elif c.startswith("q") or c == "":
return
@ -49,275 +55,90 @@ def add_score(con, game, uid, score, detail=""):
" VALUES (?,?,?,?,?)", (game, uid, score, detail, int(time.time())))
# ------------------------------------------------------------------ mastermind
def mastermind(t, con, me):
# Mastermind: 4 pegs, 6 colors, 10 tries
colors = ['1', '2', '3', '4', '5', '6'] # represent colors as digits
secret = [random.choice(colors) for _ in range(4)]
tries = 0
max_tries = 10
t.header("MASTERMIND")
t.line(" I have selected a sequence of 4 colors from 1-6.")
t.line(" You have 10 tries to guess the sequence.")
t.line(" Feedback: Black = correct color and position, White = correct color only.")
t.line(" Enter your guess as 4 digits (e.g. 1234) or Q to quit.")
while tries < max_tries:
s = t.ask("\n guess> ", maxlen=10)
if s.lower().startswith("q"):
t.line(" The code was %s." % ''.join(secret))
return
if len(s) != 4 or not all(c in colors for c in s):
t.line(" Enter exactly 4 digits from 1-6.")
continue
guess = list(s)
tries += 1
# Calculate black and white pegs
black = sum(1 for i in range(4) if guess[i] == secret[i])
# Count occurrences of each color in secret and guess for white pegs
secret_counts = {c: secret.count(c) for c in set(secret)}
guess_counts = {c: guess.count(c) for c in set(guess)}
white = sum(min(secret_counts.get(c, 0), guess_counts.get(c, 0)) for c in set(secret)) - black
if black == 4:
score = max(1, 100 - 10 * tries)
add_score(con, "mastermind", me["id"], score, "%d tries" % tries)
t.line(" Correct! %d in %d tries. Score %d." % (''.join(secret), tries, score))
return
else:
t.line(" Feedback: %d Black, %d White. (tries: %d)" % (black, white, tries))
t.line(" You ran out of tries. The code was %s." % ''.join(secret))
def hangman(t, con, me):
# Hangman: word guessing game, 6 lives
import string
WORDS = ["python", "bbs", "telnet", "wml", "matrix", "linux", "mastermind", "screens", "forum", "games"]
word = random.choice(WORDS)
word_letters = set(word)
alphabet = set(string.ascii_lowercase)
used_letters = set()
lives = 6
t.header("HANGMAN")
t.line("I am thinking of a word. It has %d letters." % len(word))
t.line("You have %d lives." % lives)
while len(word_letters) > 0 and lives > 0:
# What current word is (with dashes for unguessed letters)
word_list = [letter if letter in used_letters else "-" for letter in word]
t.line("Current word: " + " ".join(word_list))
t.line("Lives left: %d" % lives)
t.line("Used letters: " + " ".join(sorted(used_letters)))
# User input
t.line("Guess a letter:")
s = t.ask("> ").lower()
if len(s) != 1 or s not in alphabet:
t.line("Please enter a single letter from a-z.")
continue
# If user has already guessed this letter
if s in used_letters:
t.line("You have already used that letter. Please try again.")
continue
# Add letter to used
used_letters.add(s)
# Check if letter is in word
if s in word_letters:
word_letters.discard(s)
t.line("Good! %s is in the word." % s)
else:
lives -= 1
t.line("%s is not in the word." % s)
# Game over
if lives == 0:
t.line("You died! The word was %s." % word)
else:
t.line("Yay! You guessed the word %s!" % word)
score = max(1, 50 - (6 - lives) * 5)
add_score(con, "hangman", me["id"], score, "%d lives remaining" % lives)
def scores(t, con):
names = {"guess": "Guess the Number", "quiz": "Quick Quiz",
"ttt": "Noughts & Crosses", "nim": "Nim"}
t.header("HIGH SCORES")
for g, label in names.items():
rows = q(con, "SELECT u.username, MAX(s.score) sc FROM scores s "
"JOIN users u ON u.id=s.user_id WHERE s.game=? "
"GROUP BY s.user_id ORDER BY sc DESC LIMIT 5", (g,))
t.line("\n " + label + ":")
if not rows:
t.line(" (none yet)")
for i, r in enumerate(rows, 1):
t.line(" %d. %-14s %d" % (i, r["username"][:14], r["sc"]))
t.pause()
# ------------------------------------------------------------------ guess
def guess(t, con, me):
n = random.randint(1, 100)
tries = 0
t.header("GUESS THE NUMBER")
t.line(" I picked a number from 1 to 100. Fewer guesses = more points.")
t.line(" Type Q to give up.")
while True:
s = t.ask("\n guess> ", maxlen=4)
if s.lower().startswith("q"):
t.line(" The number was %d." % n)
return
if not s.isdigit():
t.line(" Enter a number 1-100.")
continue
g = int(s)
if not 1 <= g <= 100:
t.line(" Enter a number 1-100.")
continue
tries += 1
if g == n:
score = max(1, 110 - 10 * tries)
add_score(con, "guess", me["id"], score, "%d tries" % tries)
t.line(" Correct! %d in %d tries. Score %d." % (n, tries, score))
return
t.line(" Too %s. (tries: %d)" % ("LOW" if g < n else "HIGH", tries))
# ------------------------------------------------------------------ quiz
def quiz(t, con, me):
qs = random.sample(QUESTIONS, 5)
right = 0
t.header("QUICK QUIZ")
for i, (question, opts, ans) in enumerate(qs, 1):
t.line("\n Q%d/5: %s" % (i, question))
for j, o in enumerate(opts):
t.line(" %d) %s" % (j + 1, o))
s = t.ask(" answer> ", maxlen=2)
pick = int(s) - 1 if s.isdigit() else -1
if pick == ans:
right += 1
t.line(" Correct!")
else:
t.line(" Wrong - it was: %s" % opts[ans])
score = right * 20
add_score(con, "quiz", me["id"], score, "%d/5" % right)
t.line("\n Final: %d/5 correct, score %d." % (right, score))
t.pause()
# ------------------------------------------------- multiplayer plumbing
def seat_of(m, uid):
if m["p1"] == uid:
return 1
if m["p2"] == uid:
return 2
return 0
def lobby(t, con, me, game, label, new_state):
"""Shared lobby: returns a match id to play, or None to go back."""
while True:
mine = q(con, "SELECT m.*, a.username n1, b.username n2 FROM matches m "
"LEFT JOIN users a ON a.id=m.p1 LEFT JOIN users b ON b.id=m.p2 "
"WHERE m.game=? AND (m.p1=? OR m.p2=?) "
"AND m.status IN ('open','playing') "
"ORDER BY m.updated_at DESC LIMIT 10",
(game, me["id"], me["id"]))
open_ = q(con, "SELECT m.*, a.username n1 FROM matches m "
"LEFT JOIN users a ON a.id=m.p1 "
"WHERE m.game=? AND m.status='open' AND m.p1<>? "
"ORDER BY m.id DESC LIMIT 10", (game, me["id"]))
t.header(label + " - LOBBY")
t.line(" Your games:")
if not mine:
t.line(" (none)")
for r in mine:
opp = (r["n2"] or "waiting...") if r["p1"] == me["id"] else (r["n1"] or "?")
yours = (r["status"] == "playing" and seat_of(r, me["id"]) == r["turn"])
t.line(" #%d vs %-12s %s" % (r["id"], opp[:12],
"<< YOUR TURN" if yours else ""))
t.line(" Open games to join:")
if not open_:
t.line(" (none)")
for r in open_:
t.line(" #%d by %s" % (r["id"], r["n1"] or "?"))
t.line("\n [C]reate J <id> = join #<id> = play [Q]back")
c = t.ask("\nlobby> ").lower().strip()
if c.startswith("c"):
now = int(time.time())
mid = ex(con, "INSERT INTO matches (game,p1,turn,state,status,"
"created_at,updated_at) VALUES (?,?,1,?,'open',?,?)",
(game, me["id"], new_state, now, now))
t.line(" Created game #%d - waiting for an opponent." % mid)
elif c.startswith("j"):
digits = "".join(ch for ch in c if ch.isdigit())
if digits:
mid = int(digits)
m = q1(con, "SELECT * FROM matches WHERE id=? AND game=?", (mid, game))
if not m or m["status"] != "open" or m["p1"] == me["id"]:
t.line(" Cannot join that game.")
else:
ex(con, "UPDATE matches SET p2=?, status='playing', updated_at=?"
" WHERE id=?", (me["id"], int(time.time()), mid))
t.line(" Joined #%d." % mid)
return mid
elif c.startswith("#") or c.isdigit():
digits = "".join(ch for ch in c if ch.isdigit())
if digits:
return int(digits)
elif c.startswith("q") or c == "":
return None
def get_match(con, game, mid):
return q1(con, "SELECT m.*, a.username n1, b.username n2 FROM matches m "
"LEFT JOIN users a ON a.id=m.p1 LEFT JOIN users b ON b.id=m.p2 "
"WHERE m.id=? AND m.game=?", (mid, game))
def save_match(con, mid, state, turn, status="playing", winner=None):
ex(con, "UPDATE matches SET state=?,turn=?,status=?,winner=?,updated_at=?"
" WHERE id=?", (state, turn, status, winner, int(time.time()), mid))
# ------------------------------------------------------------------ ttt
def ttt_winner(b):
for a, c, d in [(0,1,2),(3,4,5),(6,7,8),(0,3,6),(1,4,7),(2,5,8),(0,4,8),(2,4,6)]:
if b[a] and b[a] == b[c] == b[d]:
return b[a]
return None
def ttt(t, con, me):
mid = lobby(t, con, me, "ttt", "NOUGHTS & CROSSES",
json.dumps({"b": [""] * 9}))
if mid is None:
return
while True:
m = get_match(con, "ttt", mid)
if not m:
t.line(" No such game.")
return
st = json.loads(m["state"])
b = st["b"]
seat = seat_of(m, me["id"])
t.header("#%d X=%s O=%s" % (mid, m["n1"] or "?", m["n2"] or "waiting"))
for r in range(3):
cells = [b[r*3+c] if b[r*3+c] else str(r*3+c+1) for c in range(3)]
t.line(" %s | %s | %s" % tuple(cells))
if r < 2:
t.line(" ---+---+---")
if m["status"] == "open":
t.line("\n Waiting for an opponent to join.")
t.line(" [R]efresh [Q]back")
elif m["status"] == "done":
if m["winner"] is None:
t.line("\n Result: draw.")
else:
t.line("\n Winner: %s" % (m["n1"] if m["winner"] == m["p1"] else m["n2"]))
t.pause()
return
elif seat == 0:
t.line("\n Spectating. Turn: player %d" % m["turn"])
t.line(" [R]efresh [Q]back")
elif seat == m["turn"]:
t.line("\n Your turn (%s). Enter a free square 1-9." % ("X" if seat == 1 else "O"))
else:
t.line("\n Opponent to move. [R]efresh [Q]back")
c = t.ask("\nttt> ").lower().strip()
if c.startswith("q"):
return
if c.startswith("r") or c == "":
continue
if m["status"] != "playing" or seat == 0 or seat != m["turn"]:
t.line(" Not your move.")
continue
if not c.isdigit() or not 1 <= int(c) <= 9:
t.line(" Pick 1-9.")
continue
i = int(c) - 1
if b[i]:
t.line(" That square is taken.")
continue
b[i] = "X" if seat == 1 else "O"
st["b"] = b
w = ttt_winner(b)
if w:
save_match(con, mid, json.dumps(st), seat, "done", me["id"])
add_score(con, "ttt", me["id"], 50, "win")
t.line(" You win!")
elif all(b):
save_match(con, mid, json.dumps(st), seat, "done", None)
t.line(" Draw.")
else:
save_match(con, mid, json.dumps(st), 2 if seat == 1 else 1)
t.line(" Move played.")
# ------------------------------------------------------------------ nim
def nim(t, con, me):
mid = lobby(t, con, me, "nim", "NIM - 21 STICKS", json.dumps({"sticks": 21}))
if mid is None:
return
while True:
m = get_match(con, "nim", mid)
if not m:
t.line(" No such game.")
return
st = json.loads(m["state"])
left = st["sticks"]
seat = seat_of(m, me["id"])
t.header("#%d %s vs %s" % (mid, m["n1"] or "?", m["n2"] or "waiting"))
t.line(" " + "| " * left)
t.line(" %d sticks left. Take the LAST stick and you LOSE." % left)
if m["status"] == "open":
t.line("\n Waiting for an opponent. [R]efresh [Q]back")
elif m["status"] == "done":
t.line("\n Winner: %s" % (m["n1"] if m["winner"] == m["p1"] else m["n2"]))
t.pause()
return
elif seat == 0:
t.line("\n Spectating. [R]efresh [Q]back")
elif seat == m["turn"]:
t.line("\n Your turn - take 1, 2 or 3.")
else:
t.line("\n Opponent to move. [R]efresh [Q]back")
c = t.ask("\nnim> ").lower().strip()
if c.startswith("q"):
return
if c.startswith("r") or c == "":
continue
if m["status"] != "playing" or seat == 0 or seat != m["turn"]:
t.line(" Not your move.")
continue
if c not in ("1", "2", "3") or int(c) > left:
t.line(" Take 1-3, and no more than remain.")
continue
n = int(c)
st["sticks"] = left - n
if st["sticks"] <= 0:
winner = m["p2"] if seat == 1 else m["p1"]
save_match(con, mid, json.dumps(st), seat, "done", winner)
add_score(con, "nim", winner, 40, "win")
t.line(" You took the last stick - you LOSE!")
else:
save_match(con, mid, json.dumps(st), 2 if seat == 1 else 1)
t.line(" You took %d. %d left." % (n, st["sticks"]))
"ttt": "Noughts & Crosses", "nim": "Nim", "mastermind": "Mastermind", "hangman": "Hangman"}

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@ -7,6 +7,8 @@ p_para('Single player:');
p_links([
['/games/guess.php', 'Guess the Number'],
['/games/quiz.php', 'Quick Quiz'],
['/games/mastermind.php', 'Mastermind'],
['/games/hangman.php', 'Hangman'],
]);
p_para('Multiplayer (play a friend):');
p_links([

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@ -0,0 +1,98 @@
<?php
// Single player: Hangman. Guess the word, 6 lives.
// State persisted in sp_games (game='hangman').
require_once __DIR__ . '/../lib/bootstrap.php';
$me = require_login();
const H_WORDS = ['python', 'bbs', 'telnet', 'wml', 'matrix', 'linux', 'mastermind', 'screens', 'forum', 'games'];
const H_MAX_LIVES = 6;
function h_load(int $uid): ?array {
$s = db()->prepare("SELECT * FROM sp_games WHERE user_id=? AND game='hangman'
AND status='active' ORDER BY id DESC LIMIT 1");
$s->execute([$uid]);
return $s->fetch() ?: null;
}
function h_new(int $uid): array {
$word = H_WORDS[array_rand(H_WORDS)];
$st = json_encode(['word' => $word, 'used' => [], 'lives' => H_MAX_LIVES]);
$now = time();
db()->prepare("INSERT INTO sp_games (game,user_id,state,created_at,updated_at)
VALUES ('hangman',?,?,?,?)")->execute([$uid, $st, $now, $now]);
return h_load($uid);
}
$msg = ''; $done = false;
$g = h_load((int)$me['id']);
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
require_csrf();
$act = $_POST['act'] ?? '';
if ($act === 'new') {
if ($g) db()->prepare("UPDATE sp_games SET status='abandoned' WHERE id=?")->execute([$g['id']]);
$g = h_new((int)$me['id']);
$msg = 'New game! I have chosen a word. Guess letters one at a time.';
} else {
if (!$g) $g = h_new((int)$me['id']);
$st = json_decode($g['state'], true);
$letter = strtolower((string)($_POST['letter'] ?? ''));
if (strlen($letter) !== 1 || !ctype_alpha($letter)) {
$msg = 'Please enter a single letter a-z.';
} elseif (in_array($letter, $st['used'], true)) {
$msg = 'You have already used that letter.';
} else {
$st['used'][] = $letter;
if (in_array($letter, str_split($st['word']), true)) {
$msg = 'Good! ' . $letter . ' is in the word.';
} else {
$st['lives']--;
$msg = $letter . ' is not in the word.';
}
// Check win/loss
$word_letters = array_diff(str_split($st['word']), $st['used']);
if (empty($word_letters)) {
$score = max(1, 50 - (H_MAX_LIVES - $st['lives']) * 5);
db()->prepare("UPDATE sp_games SET status='won', state=?, updated_at=? WHERE id=?")
->execute([json_encode($st), time(), $g['id']]);
db()->prepare("INSERT INTO scores (game,user_id,score,detail,created_at)
VALUES ('hangman',?,?,?,?)")
->execute([$me['id'], $score, $st['lives'] . ' lives left', time()]);
$msg = "Yay! You guessed the word {$st['word']}! Score: $score";
$done = true; $g = null;
} elseif ($st['lives'] <= 0) {
db()->prepare("UPDATE sp_games SET status='lost', state=?, updated_at=? WHERE id=?")
->execute([json_encode($st), time(), $g['id']]);
$msg = "You died! The word was {$st['word']}.";
$done = true; $g = null;
} else {
db()->prepare("UPDATE sp_games SET state=?, updated_at=? WHERE id=?")
->execute([json_encode($st), time(), $g['id']]);
$g['state'] = json_encode($st);
}
}
}
}
page_start('Hangman', ['back' => '/games.php']);
if ($msg) p_para($msg);
if ($g) {
$st = json_decode($g['state'], true);
$display = '';
foreach (str_split($st['word']) as $ch) {
$display .= (in_array($ch, $st['used'], true) ? $ch : '-') . ' ';
}
p_para('Word: ' . trim($display));
p_para('Lives left: ' . $st['lives']);
if ($st['used']) p_para('Used: ' . implode(', ', $st['used']));
p_form('/games/hangman.php', [
['name' => 'letter', 'label' => 'Guess a letter', 'maxlength' => 1,
'format' => '*A'],
], 'Guess');
} else {
if (!$done) p_para('Guess the word one letter at a time. You have 6 lives.');
}
p_form('/games/hangman.php', [
['name' => 'act', 'type' => 'hidden', 'value' => 'new'],
], $g ? 'Restart' : 'New game');
p_links([['/games/scores.php', 'High scores', ['g' => 'hangman']], ['/games.php', 'Games']]);
page_end();

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@ -0,0 +1,110 @@
<?php
// Single player: Mastermind. 4 pegs, 6 colors, 10 tries.
// State persisted in sp_games (game='mastermind').
require_once __DIR__ . '/../lib/bootstrap.php';
$me = require_login();
const MM_COLORS = ['1', '2', '3', '4', '5', '6'];
const MM_MAX_TRIES = 10;
function mm_load(int $uid): ?array {
$s = db()->prepare("SELECT * FROM sp_games WHERE user_id=? AND game='mastermind'
AND status='active' ORDER BY id DESC LIMIT 1");
$s->execute([$uid]);
return $s->fetch() ?: null;
}
function mm_new(int $uid): array {
$secret = [];
foreach (range(0, 3)) $secret[] = MM_COLORS[array_rand(MM_COLORS)];
$st = json_encode(['secret' => $secret, 'tries' => 0, 'log' => []]);
$now = time();
db()->prepare("INSERT INTO sp_games (game,user_id,state,created_at,updated_at)
VALUES ('mastermind',?,?,?,?)")->execute([$uid, $st, $now, $now]);
return mm_load($uid);
}
function mm_feedback(array $secret, array $guess): array {
$black = 0;
$sCounts = [];
$gCounts = [];
for ($i = 0; $i < 4; $i++) {
if ($guess[$i] === $secret[$i]) $black++;
$sCounts[$secret[$i]] = ($sCounts[$secret[$i]] ?? 0) + 1;
$gCounts[$guess[$i]] = ($gCounts[$guess[$i]] ?? 0) + 1;
}
$white = 0;
foreach ($sCounts as $c => $n) {
$white += min($n, $gCounts[$c] ?? 0);
}
return [$black, $white - $black];
}
$msg = ''; $done = false;
$g = mm_load((int)$me['id']);
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
require_csrf();
$act = $_POST['act'] ?? '';
if ($act === 'new') {
if ($g) db()->prepare("UPDATE sp_games SET status='abandoned' WHERE id=?")->execute([$g['id']]);
$g = mm_new((int)$me['id']);
$msg = 'New game! I have chosen a sequence of 4 colors from 1-6.';
} else {
if (!$g) $g = mm_new((int)$me['id']);
$st = json_decode($g['state'], true);
$raw = (string)($_POST['guess'] ?? '');
if (strlen($raw) !== 4 || !ctype_digit($raw) || !array_reduce(str_split($raw), function($carry, $c) { return $carry && in_array($c, MM_COLORS, true); }, true)) {
$msg = 'Enter exactly 4 digits from 1-6 (e.g. 1234).';
} else {
$guess = str_split($raw);
$st['tries']++;
$st['log'][] = $guess;
list($black, $white) = mm_feedback($st['secret'], $guess);
if ($black === 4) {
$score = max(1, 100 - 10 * (int)$st['tries']);
db()->prepare("UPDATE sp_games SET status='won', state=?, updated_at=? WHERE id=?")
->execute([json_encode($st), time(), $g['id']]);
db()->prepare("INSERT INTO scores (game,user_id,score,detail,created_at)
VALUES ('mastermind',?,?,?,?)")
->execute([$me['id'], $score, $st['tries'] . ' tries', time()]);
$msg = "Correct! " . implode('', $st['secret']) . " in {$st['tries']} tries. Score: $score";
$done = true; $g = null;
} elseif ($st['tries'] >= MM_MAX_TRIES) {
db()->prepare("UPDATE sp_games SET status='lost', state=?, updated_at=? WHERE id=?")
->execute([json_encode($st), time(), $g['id']]);
$msg = "Out of tries. The code was " . implode('', $st['secret']) . '.';
$done = true; $g = null;
} else {
db()->prepare("UPDATE sp_games SET state=?, updated_at=? WHERE id=?")
->execute([json_encode($st), time(), $g['id']]);
$g['state'] = json_encode($st);
$msg = "Feedback: $black Black, $white White. Tries: {$st['tries']}.";
}
}
}
}
page_start('Mastermind', ['back' => '/games.php']);
if ($msg) p_para($msg);
if ($g) {
$st = json_decode($g['state'], true);
if ($st['log']) {
$rows = [];
foreach (array_slice($st['log'], -5) as $lg) {
$rows[] = implode('', $lg);
}
p_para('Recent guesses: ' . implode(', ', $rows));
}
p_para('Guess a 4-digit code (digits 1-6).');
p_form('/games/mastermind.php', [
['name' => 'guess', 'label' => 'Your guess (e.g. 1234)', 'maxlength' => 4,
'format' => '*N'],
], 'Guess');
} else {
if (!$done) p_para('Guess the secret 4-color sequence. Black = right color and position, White = right color only.');
}
p_form('/games/mastermind.php', [
['name' => 'act', 'type' => 'hidden', 'value' => 'new'],
], $g ? 'Restart' : 'New game');
p_links([['/games/scores.php', 'High scores', ['g' => 'mastermind']], ['/games.php', 'Games']]);
page_end();

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@ -1,7 +1,7 @@
<?php
require_once __DIR__ . '/../lib/bootstrap.php';
$games = ['guess' => 'Guess the Number', 'quiz' => 'Quick Quiz',
'ttt' => 'Noughts & Crosses', 'nim' => 'Nim'];
'ttt' => 'Noughts & Crosses', 'nim' => 'Nim', 'mastermind' => 'Mastermind'];
$g = (string)($_GET['g'] ?? '');
page_start('High scores', ['back' => '/games.php']);