# Study groups that race on real solving — every puzzle machine-verified to have one answer — Deduce

> Deduce lets your study group, coaching batch or WhatsApp prep group compete on a private daily reasoning leaderboard. Create a Challenge Friends league, share a 6-character code, and everyone races the same server-validated puzzle each day — free, for IBPS, SBI and SSC prep.

Source: https://deducepuzzles.com/reasoning-app-with-leaderboard-for-study-groups

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## A reasoning app with a leaderboard for your study group

### How it works

- **Create a league** from the Groups section on the home screen — you'll get a 6-character join code.
- **Share the code** on WhatsApp or Telegram; anyone with a Deduce account can join (up to 100 members).
- **Play the same daily puzzle.** Everyone solves the day's fresh reasoning puzzle, and the league board ranks your members by who solved fastest with fewest attempts.

### Why batches use it

- **Friendly competition, privately.** Your scores stay inside the league — no showing the whole internet an off day.
- **The board is honest.** Timing, attempts and the answer are validated on the server, so the ranking reflects real solving and can't be gamed.
- **It builds the habit together.** When your batch is on the board, "I'll practise later" becomes a five-minute daily race you actually keep — that's the streak that builds exam speed.
- **National and state boards too.** Alongside your private league you can see where you rank across India and within your state.

### For coaching institutes

Running a batch? A private league gives your class a shared daily reasoning rep on fresh, can't-leak, provably-correct puzzles. Every puzzle is machine-checked to have exactly one solution before it's served, so there's nothing to memorise and nothing that can circulate as an answer key. See the full [feature list](https://deducepuzzles.com/features), or write to [hello@deducepuzzles.com](mailto:hello@deducepuzzles.com) about batch use.