# Tactic Toolbox Open Sicilian — Pruijssers and Zwirs

> Pruijssers and Zwirs (iPhone/iPad app by ChessBase Schachprogramme- Schachdatenbank Verlags GmbH.)

- Source: https://appshunter.io/ios/app/tactic-toolbox-open-sicilian/id1515461778 (this page in markdown: same URL + `.md`)
- Developer: [ChessBase Schachprogramme- Schachdatenbank Verlags GmbH](https://appshunter.io/developer/417720797)
- Category: Games, Education
- Price: $24.99
- Age rating: 4+
- Requires: iOS 13.0 · 799 MB
- Released: 2020-06-12
- Data updated: 2026-06-10
- User reviews in markdown: https://appshunter.io/ios/app/tactic-toolbox-open-sicilian/id1515461778/reviews.md

## What is Tactic Toolbox Open Sicilian?

3.d4 is the most popular response to the Sicilian, both at grandmaster and club level. The theory of the opening is huge and grows continually. Knowing typical tactical patterns is important to keep the upper hand in these sharp lines. Roeland Pruijssers and Nico Zwirs show patterns you should know when playing the Open Sicilian. The interactive FritzTrainer format invites the viewer to answer questions and helps to test and deepen your knowledge. And even if the Sicilian is not part of your repertoire you will profit from this lecture– after all, mastering tactics is always useful in chess.

Themes: b6-Tactics, The chase, The e5-break, Elimination, The Lure, Mating Attacks, Nd5, Nf5, Opening Files, Pin, Positional Exchange Sac- rifice, Sacrifices on e6 and b5, Trapping, Weak Pawns, Zwischenzug, Defending, Double Attack, Calculation

• Video running time: 7 hours (English)
• With interactive training including video feedback
• Extra: Database with even more examples

Roeland Pruijssers is a Dutch Grandmaster living in Apeldoorn. He started chess at a young age, getting his IM title at 18 and the GM title at 22. Besides being an active player, he’s also a prolific chess coach and author.

Nico Zwirs is a Dutch International Master living in Amsterdam, who grew up in Apeldoorn. He got the IM title in 2019, reaching a peak rating of 2453. He’s an active player, participating in several European leagues.


## Version history (last 1 release)

### 1.0 — 2020-06-12

No release notes.

## Apps similar to Tactic Toolbox Open Sicilian

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [MONOPOLY: The Board Game](https://appshunter.io/ios/app/monopoly-the-board-game/id1477966166) | 4.7 (183,726) | $4.99 | Games |
| [Chess King - Learn to Play](https://appshunter.io/ios/app/chess-king-learn-to-play/id1305823239) | 4.8 (2,442) | Free | Games |
| [lidraughts • Online Draughts](https://appshunter.io/ios/app/lidraughts-online-draughts/id1485028698) | 4.8 (12) | Free | Games |
| [Chessimo 2.0](https://appshunter.io/ios/app/chessimo-20/id960842536) | 4.2 (53) | Free | Games |
| [Chess Royale](https://appshunter.io/ios/app/chess-royale/id1434658250) | 4.5 (19,372) | Free | Games |
| [Chessify - Magic Chess Tools](https://appshunter.io/ios/app/chessify-magic-chess-tools/id1397066775) | 4.4 (392) | Free | Games |

## More apps by ChessBase Schachprogramme- Schachdatenbank Verlags GmbH

- [Casual Chess](https://appshunter.io/ios/app/casual-chess/id536471031)
- [Tactics](https://appshunter.io/ios/app/tactics/id576295991)
- [Navigating the Ruy Lopez Vol.2](https://appshunter.io/ios/app/navigating-the-ruy-lopez-vol2/id1480020149)
- [Caro-Kann 1,  Marco Baldauf](https://appshunter.io/ios/app/caro-kann-1-marco-baldauf/id1489595899)
- [Caro-Kann 2, Marco Baldauf](https://appshunter.io/ios/app/caro-kann-2-marco-baldauf/id1489596265)
- [Mastering pattern Recognition](https://appshunter.io/ios/app/mastering-pattern-recognition/id1489614698)

All apps by ChessBase Schachprogramme- Schachdatenbank Verlags GmbH: https://appshunter.io/developer/417720797

---

*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 2026-06-10.*