Data Audit Draft the data. Face the tests. Find the blind spot.

1. Quick start — read this, start playing

   • Deal face-up Photos equal to the number of players + 2. That's the market.
   • Start of each round: flip one Test card into the Test row, so everyone can see what's coming.
   • Going around once, each player takes one Photo from the market into their face-up training set. Refill the market after each pick.
   • After 6 rounds, flip one surprise Test. Every Test your photos can pass is +2. Balanced data is +3.
   • That is the whole game. Everything below is here for when a question comes up.

2. Setup

   • Shuffle the 27 Photo cards. Deal face-up Photos in a row equal to the number of players + 2 — that's the market.
   • Shuffle the 18 Test cards face-down. Leave room for a Test row.
   • The youngest player is the first Picker. Everyone starts with an empty training set.

3. Each round

   • Flip the top Test card face-up into the Test row. It stays there all game.
   • Starting with the Picker and going left, each player takes one Photo from the market and puts it face-up in their training set.
   • Refill the market from the Photo deck after each pick. If the deck is empty, don't refill.
   • When everyone has picked once, the round ends. Pass the Picker role to the left.

4. The surprise Test and the audit

   • After round 6, everyone has 6 photos. Flip one more Test — the surprise Test. Nobody could plan for it.
   • Now there are 7 Tests in the row. Check each one against your own training set.
   • Point at the photo that passes a Test. If you can't point at one, that Test found a blind spot in your bot.

5. How to score

   • +2 for each Test your training set passes: one photo shows that animal AND that place or time.
   • +3 balanced data: your photos include every animal (Cat, Dog, Bird), every place (Home, Park, Snow), and every time (Day, Dusk, Night).
   • Perfect score is 17.
   • Ties: balanced data beats unbalanced, then the younger player.
   • Example: Cat Home Day, Cat Snow Night, Dog Park Dusk, Dog Snow Day, Bird Park Night, Bird Home Dusk is balanced. Its blind spots: Cat + Park, Cat + Dusk, Dog + Home, Dog + Night, Bird + Snow, Bird + Day.

6. What the cards teach

   • Photo — a piece of training data. A bot learns only from what it is shown.
   • Test — a real-world case the bot meets after training.
   • Blind spot — a case the training data never showed. Real AI fails here too.
   • Balanced data — covering every kind of case beats a big pile of the same one.

7. Variants

   • 2 players — same rules. The market is 4 photos.
   • Solo — market of 3. After each pick, discard the leftmost photo and refill. Flip all 7 Tests at the end. Score 11 or more to win.
   • Classroom — after scoring, each player says one sentence: "My bot would fail at __ because it never saw __."
   • Hard mode — no Test row during the draft. Flip all 7 Tests at the end, like the real world.

Downloads

• Instruction sheet

  Plain paper · 1 page · 8.5 × 11

  One 8.5 × 11 page for the table — quick start, setup, turns, and scoring.

  Open Download

• Full rules

  Plain paper · duplex · 2 pages

  Same game, longer type — plus what the cards teach and the variants.

  Open Download

• Photos + Tests (Avery 5388)

  Avery 5388 · 15 sheets

  27 Photos — every Animal × Place × Time once — and 18 Tests.

  Open Download