# Duel SIM: Strategy Board Game — Lines, dots, and no triangles.

> Two-player abstract strategy board game based on Ramsey Theory. (iPhone/iPad app by Arkadiusz Szafraniec.)

- Source: https://appshunter.io/ios/app/duel-sim-strategy-board-game/id6775958008 (this page in markdown: same URL + `.md`)
- Developer: [Arkadiusz Szafraniec](https://appshunter.io/developer/6775958010)
- Category: Games, Board, Strategy
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 32 MB
- Languages: American English
- Released: 2026-06-15
- Data updated: 2026-08-18
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/duel-sim-strategy-board-game/id6775958008/reviews.md

## What is Duel SIM?

Duel SIM is part of the Duel series — games built around one idea: your phone as a board game. Two people, same room, one device between them. No online mode, no matchmaking, no notifications. Just the game and whoever's sitting across from you.

Not ready to face a real opponent yet? Two built-in AI modes let you train first — and show up prepared.

Duel SIM is a two-player abstract strategy game rooted in Ramsey Theory — the mathematical field that proves some patterns are unavoidable.

OBJECTIVE
Players alternate drawing coloured lines between dots on a circular board. The player who completes a triangle in their own colour loses. Simple rule. Deep strategy.

GUARANTEED WINNER
By Ramsey theory, on a board of 6 or more dots a single-colour triangle MUST eventually appear. The game always ends — stalemates are mathematically impossible.

GAME MODES
• Local Duel — two players, one device, face to face
• vs AI Trainer — hone your strategy against a heuristic opponent
• vs AI Master — challenge the minimax engine for a serious fight

SETTINGS & DEPTH
• Board size: 6, 7, 8 or 9 vertices — more dots means longer, more complex games
• Partial Start — skip the quiet opening; jump straight into the tense endgame
• Helper Lines — toggle available-move hints on or off
• Match format — first player to reach a target score wins the match
• Custom player names

CLEAN & FOCUSED
No ads. No accounts. No internet required. Pick it up and play.

HOW TO PLAY
Tap any dot, then tap another to draw a line in your colour. Avoid being the player who closes a triangle. Force your opponent into doing it instead.

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A modern take on the classic pen-and-paper game of SIM, reimagined with neon visuals and a smooth touch interface. Part of the Duel series — turning phones back into board games.

## Key features

- Local multiplayer on one device
- AI opponents for training
- Abstract strategy gameplay
- Adjustable board size
- Helper lines for moves
- Match score system

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/duel-sim-strategy-board-game/id6775958008/reviews.md

### 5/5 — Love the game!

*2026-07-14*

Love the game! Definitely going give it a try

## Frequently asked questions about Duel SIM

### What is Duel SIM?

Duel SIM is a two-player abstract strategy board game inspired by Ramsey Theory. Players draw colored lines between dots, aiming to avoid completing a triangle in their own color.

### Does Duel SIM have online multiplayer?

No, Duel SIM is designed for local, face-to-face play on a single device. It does not feature online modes or matchmaking.

### Can I play Duel SIM against AI?

Yes, Duel SIM offers two AI modes: a 'Trainer' mode to hone your strategy and a 'Master' mode that challenges a minimax engine.

### What board sizes are available in Duel SIM?

You can choose board sizes with 6, 7, 8, or 9 vertices. Larger boards result in longer and more complex games.

### Does Duel SIM have ads?

No, Duel SIM is ad-free and does not require an internet connection or accounts to play.

### How do I win in Duel SIM?

The objective is to force your opponent to complete a triangle in their own color. By Ramsey theory, a winner is guaranteed on boards with 6 or more dots.

### What is the age rating for Duel SIM?

Duel SIM has an age rating of 4+, making it suitable for a wide range of players.

### How often is Duel SIM updated?

Duel SIM was last updated on 2026-06-16, indicating recent development and support.

## Version history (last 1 release)

### 1.0 — 2026-06-16

No release notes.

## More apps by Arkadiusz Szafraniec

- [Duel Snake: 2 Player Battle](https://appshunter.io/ios/app/duel-snake-2-player-battle/id6783970937)
- [Duel Shift: Line Up Four](https://appshunter.io/ios/app/duel-shift-line-up-four/id6787484354)
- [Duel Echo: Melody Memory Game](https://appshunter.io/ios/app/duel-echo-melody-memory-game/id6789843693)

All apps by Arkadiusz Szafraniec: https://appshunter.io/developer/6775958010

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*