# Outfox — Working back Puzzle | Mathallery

Source: https://mathallery.com/games/outfox/

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# Outfox

Working back · 30 levels

Take turns picking berries. Can you outfox the fox?

## How to play

- Take turns with the fox. Take berries from one bush; the sign says how many you may take.
- Whoever takes the last berry wins. On 🤢 levels the last berry is sour: whoever takes it loses.
- You go first and can always win, but the fox never slips. Find the safe numbers to leave it!

Work backwards. Taking 1–3 a turn, leave the fox 4: whatever it takes, you take the rest. So 8, 12, 16… are safe too. With two bushes, try copying the fox.

[Open Outfox](https://mathallery.com/#/play/outfox/1)

Teeter, Tint and Echo Heist are free starters. Other games unlock through earned game choices or permanent packs. Your progress stays in the browser; optional sign-in saves it to your website account.