the-most-powerful-dice.php

<?php

// https://www.youtube.com/watch?v=zzKGnuvX6IQ

$dice = [
    '333333' => [3, 3, 3, 3, 3, 3],
    '004444' => [4, 4, 4, 4, 0, 0],
    '111555' => [5, 5, 5, 1, 1, 1],
    '222266' => [2, 2, 2, 2, 6, 6],
];

$winners = [];

for ($i = 0; $i < 1000000; $i++) {
    $rolled = array_map(function (array $die):int {
        return $die[mt_rand(0, count($die) - 1)];
    }, $dice);
    $roundWinners = array_keys($rolled, max($rolled));
    $winners[] = count($roundWinners) > 1 ? 'tie' : reset($roundWinners);
}

$groups = array_reduce($winners, function (array $groups, $winner):array {
    if (!isset($groups[$winner])) {
        $groups[$winner] = 0;
    }
    $groups[$winner]++;
    return $groups;
}, []);

asort($groups);

foreach ($groups as $die => $wins) {
    echo $die . ': ' . $wins . "\n";
}