---
license: cc-by-4.0
language:
- en
pretty_name: Betkyo odds data
tags:
- casino
- gambling
- house-edge
- paytables
- provably-fair
- keno
- plinko
- blackjack
- roulette
size_categories:
- n<1K
---

# Betkyo odds data

Machine-readable tables behind the [Betkyo Journal](https://betkyo.com/en/blog/), exported from the casino game engine source rather than typed by hand. Each JSON file carries its provenance (`source` names the engine module, `article` the derivation, `generated` the export date) and a `data` object; the CSV next to it is the same table flattened. `index.json` lists them all.

| File | What it is | Derivation |
|---|---|---|
| `keno-paytables` | All forty keno payout tables (level × picks × hits), total-return multipliers | [What a keno risk level actually changes](https://betkyo.com/en/blog/what-a-keno-risk-level-changes/) |
| `plinko-multipliers` | Plinko bucket multipliers for every risk level and row count | [Plinko, priced](https://betkyo.com/en/blog/plinko-priced-the-binomial-behind-every-board/) |
| `roulette-bets` | Bet kinds, pockets covered, multiplier, expected return; wheel order and red pockets | [A roulette bet is a string](https://betkyo.com/en/blog/a-roulette-bet-is-a-string-self-describing-keys-and-the-36-table/) |
| `blackjack-dealer-outcomes` | Dealer final-total distribution by upcard, infinite shoe, dealer stands on all 17s | [Dealer bust odds by upcard](https://betkyo.com/en/blog/dealer-bust-odds-by-upcard-on-an-infinite-shoe/) |
| `koban-ladder` | Koban Flip cumulative multiplier after n straight calls, floored to cents | [Designing Koban Flip](https://betkyo.com/en/blog/designing-koban-flip-every-face-is-fixed-when-you-buy-the-coin/) |
| `fukubukuro-bags` | Item weights (millionths) and payout multiples for both lucky bags | [Designing Fukubukuro](https://betkyo.com/en/blog/designing-fukubukuro-the-lucky-bag-that-always-pays-something/) |

```python
import pandas as pd
keno = pd.read_csv("hf://datasets/betkyo/odds-data/keno-paytables.csv")
```

Canonical, current copies: [betkyo.com/data](https://betkyo.com/data/index.json). Archived, citable version: [doi:10.5281/zenodo.22725012](https://doi.org/10.5281/zenodo.22725012). Repository mirror and the derivation scripts that turn these tables into the return figures quoted in the articles: [github.com/betkyo-open-labs](https://github.com/betkyo-open-labs). Method: [How the Journal verifies a number](https://betkyo.com/en/blog/how-the-journal-verifies-a-number-methodology/).

Licence: CC BY 4.0. Attribute as "Betkyo Journal, betkyo.com/data". Corrections: dev@betkyo.com.

These tables describe games of chance with a house edge; nothing here is betting advice. 18+.