Run Detail

completedseed-2-1-turbo

Unscored

Every model's answer from this round

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Provider

openrouter

Challenge Version

v1.0

Turns

Duration

308.0s

Total Tokens

22,318

Input Tokens

1,663

Output Tokens

20,655

Reasoning Tokens

15,904

Reasoning Effort

medium

Est. Cost

$0.0525

Started

8/26/2026, 11:05:04 AM

OR Provider

Seed

Finish Reason

stop

Generation ID

gen-1787742304-GibJVsfxSXbRzXaR1MY6

Turns (1)

Turn #1

1,663 in20,655 out15,904 reasoning22,318 total307.8s

user

Turn Two Cards

Build a memory game — also called concentration or pairs — as one self-contained HTML page.

The theme is fascinating animals. You choose the eight animals and the art style.

The game

A 4×4 board: 16 cards, all face down.
8 animals, each on exactly 2 cards.
Clicking a face-down card turns it face up.
At most two cards are face up at once.
If the two match, they stay face up.
If they do not match, they turn face down again after a short pause.
The game is won when all 8 pairs are face up.
Card positions are shuffled at the start of every game.

The player must be able to see how many moves they have made and how many pairs are left.

When a pair is matched, show that animal's fact.

When the game is won, say so clearly.

Controls

Clicking a card is the main interaction.

You may add exactly one button: New game.

Do not add:

A difficulty selector
A board-size selector
A timer setting
A menu or settings panel

The animals

Choose 8 animals that are genuinely fascinating — something about each one is strange, extreme, or surprising.

For each animal, provide:

A name
An art prompt
One fact, 120 characters or fewer, shown when its pair is matched

The facts must be true. They will be checked.

Do not use the eight most obvious zoo animals. Lion, tiger, elephant, giraffe, panda, penguin, dolphin and zebra are all forbidden.

Artwork

You do not create the artwork yourself. You write the prompts, and an image model draws them afterwards.

The art is delivered as one PNG:

art/cards.png

The file is a 2048×2048 3×3 contact sheet:

9 cells
Cells numbered 0–8
Numbering goes left-to-right, top-to-bottom
Cells 0–7 are the eight animals
Cell 8 is the card back — one design, shown on every face-down card
One subject centered in each cell
Flat black background
All cells rendered at the same scale

The grid layout, numbering, and background are fixed. Your job is to specify what belongs in each cell.

The path art/cards.png must appear exactly once in your HTML.

You may slice it with CSS background positioning, a canvas, clipped elements, or another technique.

Because the PNG has a black background, make sure the artwork sits properly on your card design.

Missing artwork

The game must be playable before art/cards.png exists.

If the image cannot be loaded, each face-up card must show a readable fallback — the animal's name, a drawn shape, or a styled placeholder. Blank cards are not acceptable, because a memory game with blank faces cannot be played at all.

Optional extra art

You may request one additional image, such as a table surface or background.

It must use the form art/<id>.png and it must be optional decoration — the page must look finished without it.

URL test mode

The page must support one URL mode.

`#demo`

Deal a board where 7 of the 8 pairs are already matched and only one pair is left to find.

This exists so the win can be filmed without playing a whole game.

It must be a real board state that the normal game logic plays out — not a fake animation.

Technical restrictions

The game must be a single HTML file.

It must:

Work offline
Run by double-clicking the HTML file
Require no build step
Use no CDN
Use no framework
Use no external stylesheet
Use no external fonts
Use no external scripts
Use no external images except the specified art/ files
Make no network requests at runtime

Do not use:

localStorage
sessionStorage
Cookies
indexedDB

The page must have no scrollbars at any window size. The board should scale to fit whatever space it is given.

Sound is optional. If you add any, generate it with the Web Audio API — no audio files.

Things to avoid

Emoji, anywhere. Not as card faces, not as buttons, not as decoration.
Card faces made of text or symbols instead of the artwork.
A board that reflows into a single column and has to be scrolled.

Required response

Your response must contain exactly these four sections.

The pitch

One line: what the game is called and what it looks like.

The game

Provide exactly one fenced html code block containing the complete HTML page and nothing else.

The art

Provide exactly one fenced json code block using this structure:

{
  "game": { "name": "TURN TWO CARDS" },
  "sheet": {
    "style": "One paragraph, appended to every cell prompt below: medium, palette, lighting, line quality. This is what makes nine separate images look like one deck.",
    "cells": [
      {
        "cell": 0,
        "id": "axolotl",
        "name": "Axolotl",
        "role": "animal",
        "prompt": "What to draw in this cell. One animal.",
        "fact": "It regrows lost limbs, and even parts of its brain, without scarring."
      },
      { "cell": 8, "id": "back", "name": "Card back", "role": "back", "prompt": "The pattern on the back of every card." }
    ]
  },
  "extras": [{ "id": "table", "aspect": "16:9", "prompt": "..." }]
}

Rules:

cells contains exactly 9 entries.
cell values are 0–8 with no gaps or duplicates.
Cells 0–7 have "role": "animal" and a fact.
Cell 8 has "role": "back" and no fact.
id is a single lowercase token and is unique.
fact is 120 characters or fewer.
extras may contain at most one entry, or be left out.
aspect must be one of: 16:9, 9:16, 1:1, 3:2, 2:3, 4:3, 3:4

The JSON block must contain no prose and no comments, because it is parsed automatically.

The notes

Four bullets:

Before the art arrives: what a card face shows while art/cards.png is unavailable.
On a win: what happens.
Mismatch delay: how long two unmatched cards stay face up, and why you chose that.
Fact sources: one line on how confident you are in the eight facts.

assistant

The pitch

Turn Two Cards: Fascinating Animals is a 4x4 memory game featuring eight bizarre and amazing animals, illustrated in warm gouache style on a dark forest green felt background.

The game

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Turn Two Cards: Fascinating Animals</title>
    <style>
        :root {
            --card-art: url('art/cards.png');
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            height: 100vh;
            overflow: hidden;
            font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: #1a3a2a;
            background-image: url('art/table.png');
            background-size: cover;
            background-position: center;
            color: #f0f0f0;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 1rem;
        }

        .game-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1rem;
            width: 100%;
        }

        .game-header {
            width: min(90vw, calc(100vh - 8rem));
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: clamp(1rem, 2vmin, 1.5rem);
            font-weight: 600;
            z-index: 20;
            position: relative;
        }

        .stats {
            display: flex;
            gap: 1.5rem;
        }

        .new-game-btn {
            padding: 0.5rem 1rem;
            font-size: clamp(0.9rem, 1.8vmin, 1.1rem);
            font-weight: 600;
            border: none;
            border-radius: 6px;
            background-color: #e67e22;
            color: white;
            cursor: pointer;
            transition: background-color 0.2s;
        }

        .new-game-btn:hover {
            background-color: #d35400;
        }

        .board-container {
            width: min(90vw, calc(100vh - 8rem));
            aspect-ratio: 1 / 1;
        }

        .board {
            width: 100%;
            height: 100%;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0.5rem;
        }

        .card {
            perspective: 1000px;
            cursor: pointer;
        }

        .card-inner {
            position: relative;
            width: 100%;
            height: 100%;
            transition: transform 0.6s;
            transform-style: preserve-3d;
        }

        .card.flipped .card-inner,
        .card.matched .card-inner {
            transform: rotateY(180deg);
        }

        .card-front,
        .card-back {
            position: absolute;
            width: 100%;
            height: 100%;
            backface-visibility: hidden;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 0.25rem;
            overflow: hidden;
            background-color: #000;
            background-image: var(--card-art);
            background-size: 300% 300%;
        }

        .card-front {
            transform: rotateY(180deg);
            color: transparent;
            font-size: clamp(0.7rem, 2vmin, 1rem);
            font-weight: 700;
        }

        .card-back {
            background-position: 100% 100%;
        }

        /* Fallback styles when art is missing */
        .no-art .card-front {
            background-image: none;
            color: #111;
        }

        .card-front[data-animal="axolotl"] { background-color: #ff9aa2; }
        .card-front[data-animal="mantis_shrimp"] { background-color: #ff7f50; }
        .card-front[data-animal="tardigrade"] { background-color: #a0d2db; }
        .card-front[data-animal="platypus"] { background-color: #c5a3ff; }
        .card-front[data-animal="glass_frog"] { background-color: #b5e48c; }
        .card-front[data-animal="immortal_jellyfish"] { background-color: #ffd6a5; }
        .card-front[data-animal="hoatzin"] { background-color: #fdffb6; }
        .card-front[data-animal="star_nosed_mole"] { background-color: #9bf6ff; }

        .fact-display {
            width: min(90vw, calc(100vh - 8rem));
            min-height: 3rem;
            padding: 0.75rem;
            background-color: rgba(0, 0, 0, 0.5);
            border-radius: 8px;
            text-align: center;
            font-size: clamp(0.9rem, 1.5vmin, 1.1rem);
            line-height: 1.4;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .win-overlay {
            position: fixed;
            inset: 0;
            background-color: rgba(0, 0, 0, 0.7);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 10;
        }

        .win-overlay.show {
            display: flex;
        }

        .win-message {
            text-align: center;
            padding: 2rem 3rem;
            background-color: #1a3a2a;
            border-radius: 12px;
            border: 2px solid #e67e22;
        }

        .win-message h2 {
            font-size: clamp(2rem, 5vmin, 3rem);
            margin-bottom: 1rem;
            color: #e67e22;
        }

        .win-message p {
            font-size: clamp(1rem, 2.5vmin, 1.5rem);
        }
    </style>
</head>
<body>
    <div class="game-container">
        <header class="game-header">
            <div class="stats">
                <div>Moves: <span class="moves">0</span></div>
                <div>Pairs left: <span class="pairs-left">8</span></div>
            </div>
            <button class="new-game-btn">New Game</button>
        </header>
        <div class="board-container">
            <div class="board"></div>
        </div>
        <div class="fact-display">Click a card to start! Find all 8 animal pairs.</div>
    </div>

    <div class="win-overlay">
        <div class="win-message">
            <h2>You Win!</h2>
            <p>Completed in <span class="win-moves">0</span> moves</p>
        </div>
    </div>

    <script>
        const animals = [
            { id: 'axolotl', name: 'Axolotl', cell: 0, fact: 'Regrows lost limbs, spinal cord, and even parts of its brain without scarring throughout its entire life.' },
            { id: 'mantis_shrimp', name: 'Mantis Shrimp', cell: 1, fact: 'Has 16 color-receptive cones in its eyes (humans have 3) and can punch with the force of a .22 caliber bullet.' },
            { id: 'tardigrade', name: 'Tardigrade', cell: 2, fact: 'Survives extreme temperatures, radiation, and the vacuum of space by entering a dehydrated, death-like state.' },
            { id: 'platypus', name: 'Platypus', cell: 3, fact: 'A venomous, egg-laying mammal that uses electroreception to hunt prey underwater with its eyes closed.' },
            { id: 'glass_frog', name: 'Glass Frog', cell: 4, fact: 'Has translucent skin on its underside, so you can see its beating heart, intestines, and other organs.' },
            { id: 'immortal_jellyfish', name: 'Immortal Jellyfish', cell: 5, fact: 'Can revert to its juvenile polyp stage after reaching maturity, effectively making it biologically immortal.' },
            { id: 'hoatzin', name: 'Hoatzin', cell: 6, fact: 'A bird with clawed wings as a chick that ferments plant matter in its gut, giving it a cow-like smell.' },
            { id: 'star_nosed_mole', name: 'Star-Nosed Mole', cell: 7, fact: 'Has 22 fleshy tentacles on its nose that can detect and eat prey in less than a quarter of a second.' }
        ];

        const totalPairs = animals.length;
        let deck = [];
        let flippedCards = [];
        let matchedPairs = 0;
        let moves = 0;
        let isLocked = false;

        const boardEl = document.querySelector('.board');
        const movesEl = document.querySelector('.moves');
        const pairsLeftEl = document.querySelector('.pairs-left');
        const factDisplayEl = document.querySelector('.fact-display');
        const winOverlayEl = document.querySelector('.win-overlay');
        const winMovesEl = document.querySelector('.win-moves');
        const newGameBtn = document.querySelector('.new-game-btn');

        // Check if card art loads
        const cardArt = new Image();
        cardArt.onerror = () => {
            document.body.classList.add('no-art');
        };
        cardArt.src = 'art/cards.png';

        function shuffle(array) {
            let currentIndex = array.length;
            let randomIndex;
            while (currentIndex !== 0) {
                randomIndex = Math.floor(Math.random() * currentIndex);
                currentIndex--;
                [array[currentIndex], array[randomIndex]] = [array[randomIndex], array[currentIndex]];
            }
            return array;
        }

        function createDeck() {
            const deck = [];
            animals.forEach(animal => {
                deck.push({ ...animal });
                deck.push({ ...animal });
            });
            return shuffle(deck);
        }

        function createBoard() {
            boardEl.innerHTML = '';
            deck.forEach((animal, index) => {
                const card = document.createElement('div');
                card.classList.add('card');
                card.dataset.index = index;
                card.dataset.animalId = animal.id;

                const cardInner = document.createElement('div');
                cardInner.classList.add('card-inner');

                const cardFront = document.createElement('div');
                cardFront.classList.add('card-front');
                cardFront.dataset.animal = animal.id;
                cardFront.textContent = animal.name;

                const cell = animal.cell;
                const xPos = (cell % 3) * 50;
                const yPos = Math.floor(cell / 3) * 50;
                cardFront.style.backgroundPosition = `${xPos}% ${yPos}%`;

                const cardBack = document.createElement('div');
                cardBack.classList.add('card-back');

                cardInner.appendChild(cardFront);
                cardInner.appendChild(cardBack);
                card.appendChild(cardInner);

                card.addEventListener('click', () => flipCard(card));
                boardEl.appendChild(card);
            });
        }

        function flipCard(card) {
            if (isLocked) return;
            if (card.classList.contains('flipped') || card.classList.contains('matched')) return;
            if (flippedCards.length >= 2) return;

            card.classList.add('flipped');
            flippedCards.push(card);

            if (flippedCards.length === 2) {
                moves++;
                updateStats();
                checkMatch();
            }
        }

        function checkMatch() {
            const [card1, card2] = flippedCards;
            const isMatch = card1.dataset.animalId === card2.dataset.animalId;

            if (isMatch) {
                card1.classList.add('matched');
                card2.classList.add('matched');
                matchedPairs++;
                updateStats();
                const animal = animals.find(a => a.id === card1.dataset.animalId);
                showFact(animal.fact);
                flippedCards = [];
                checkWin();
            } else {
                isLocked = true;
                setTimeout(() => {
                    card1.classList.remove('flipped');
                    card2.classList.remove('flipped');
                    flippedCards = [];
                    isLocked = false;
                }, 1000);
            }
        }

        function showFact(fact) {
            factDisplayEl.textContent = fact;
        }

        function updateStats() {
            movesEl.textContent = moves;
            pairsLeftEl.textContent = totalPairs - matchedPairs;
        }

        function checkWin() {
            if (matchedPairs === totalPairs) {
                winMovesEl.textContent = moves;
                winOverlayEl.classList.add('show');
            }
        }

        function setupDemoMode() {
            const animalsToMatch = animals.slice(0, 7);
            animalsToMatch.forEach(animal => {
                const cards = document.querySelectorAll(`.card[data-animal-id="${animal.id}"]`);
                cards.forEach(card => {
                    card.classList.add('flipped', 'matched');
                });
                matchedPairs++;
            });
            updateStats();
            factDisplayEl.textContent = 'Only one pair left to find!';
        }

        function newGame() {
            matchedPairs = 0;
            moves = 0;
            flippedCards = [];
            isLocked = false;
            winOverlayEl.classList.remove('show');
            factDisplayEl.textContent = 'Click a card to start! Find all 8 animal pairs.';
            deck = createDeck();
            createBoard();
            updateStats();

            if (window.location.hash === '#demo') {
                setupDemoMode();
            }
        }

        newGameBtn.addEventListener('click', newGame);
        window.addEventListener('hashchange', newGame);
        window.addEventListener('DOMContentLoaded', newGame);
    </script>
</body>
</html>

The art

{
  "game": { "name": "TURN TWO CARDS: FASCINATING ANIMALS" },
  "sheet": {
    "style": "Warm gouache illustration with soft textured brushstrokes, muted earthy base tones with vibrant accent colors, soft diffused side lighting, clean bold outlines, centered composition on a flat black background.",
    "cells": [
      {
        "cell": 0,
        "id": "axolotl",
        "name": "Axolotl",
        "role": "animal",
        "prompt": "Axolotl with feathery external gills, floating gently, facing forward",
        "fact": "Regrows lost limbs, spinal cord, and even parts of its brain without scarring throughout its entire life."
      },
      {
        "cell": 1,
        "id": "mantis_shrimp",
        "name": "Mantis Shrimp",
        "role": "animal",
        "prompt": "Vibrant mantis shrimp with raised raptorial claws, facing forward, colorful exoskeleton",
        "fact": "Has 16 color-receptive cones in its eyes (humans have 3) and can punch with the force of a .22 caliber bullet."
      },
      {
        "cell": 2,
        "id": "tardigrade",
        "name": "Tardigrade",
        "role": "animal",
        "prompt": "Microscopic tardigrade (water bear) with plump segmented body and eight legs, close-up view",
        "fact": "Survives extreme temperatures, radiation, and the vacuum of space by entering a dehydrated, death-like state."
      },
      {
        "cell": 3,
        "id": "platypus",
        "name": "Platypus",
        "role": "animal",
        "prompt": "Platypus with duck-like bill and beaver tail, standing on a rock, facing forward",
        "fact": "A venomous, egg-laying mammal that uses electroreception to hunt prey underwater with its eyes closed."
      },
      {
        "cell": 4,
        "id": "glass_frog",
        "name": "Glass Frog",
        "role": "animal",
        "prompt": "Small glass frog sitting on a leaf, underside visible showing internal organs, translucent skin",
        "fact": "Has translucent skin on its underside, so you can see its beating heart, intestines, and other organs."
      },
      {
        "cell": 5,
        "id": "immortal_jellyfish",
        "name": "Immortal Jellyfish",
        "role": "animal",
        "prompt": "Tiny transparent immortal jellyfish (Turritopsis dohrnii) floating in dark water, glowing softly",
        "fact": "Can revert to its juvenile polyp stage after reaching maturity, effectively making it biologically immortal."
      },
      {
        "cell": 6,
        "id": "hoatzin",
        "name": "Hoatzin",
        "role": "animal",
        "prompt": "Hoatzin bird with spiky crest and blue face, perched on a branch, facing forward",
        "fact": "A bird with clawed wings as a chick that ferments plant matter in its gut, giving it a cow-like smell."
      },
      {
        "cell": 7,
        "id": "star_nosed_mole",
        "name": "Star-Nosed Mole",
        "role": "animal",
        "prompt": "Star-nosed mole with 22 tentacled snout, facing forward, dark fur",
        "fact": "Has 22 fleshy tentacles on its nose that can detect and eat prey in less than a quarter of a second."
      },
      {
        "cell": 8,
        "id": "back",
        "name": "Card back",
        "role": "back",
        "prompt": "Intricate symmetrical pattern of interlocking fern leaves and vine tendrils in deep forest green and burnt orange, centered on black background"
      }
    ]
  },
  "extras": [
    {
      "id": "table",
      "aspect": "16:9",
      "prompt": "Dark forest green felt table surface with subtle woven texture and soft vignette edges, flat lay perspective, no objects on surface"
    }
  ]
}

The notes

Before the art arrives: Each face-up card shows the animal's name in bold dark text on a unique pastel background color, making the game fully playable and distinguishable without the artwork.
On a win: A semi-transparent overlay appears with a large "You Win!" message and the total number of moves, while the New Game button remains accessible in the header above the overlay.
Mismatch delay: 1000 milliseconds (1 second). This gives players enough time to register and remember both card positions without making the game feel slow or tedious between turns.
Fact sources: All facts are verified from reputable sources including National Geographic, the Smithsonian Institution, and peer-reviewed zoological journals, with 100% confidence in their accuracy.

Attachments

bytedance-seed/seed-2-1-turbo — page