Comparison

Lazy Chess vs Openings Mastermind

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Lazy Chess

This chess game offers a unique twist by presenting players with only two AI-selected moves to choose from each turn. It's designed for both casual players and enthusiasts, making chess more accessible and fun. Compete against AI or friends, unlock new themes, and improve your skills through unique scenarios.

Highlights
  • Choose from two AI-selected moves
  • Compete against AI or online friends
  • Unlock new themes and settings
  • Play unique chess scenarios
  • Leaderboard rankings
Features
Read full description

Lazy Chess is a free, non-profit game created for casual players and enthusiasts alike, where players, at worst, make the second best move available to them. On average, there are more than 30 legal chess moves available to a player in a turn, creating vigintillions of possibilities throughout a game. Lazy Chess compresses that by having you choose only two in a given turn selected by Stockfish, the most robust chess engine in the world. The catch? You won’t know which move is the best! Learn and have fun while you compete against a highly skilled AI or online friends and random opponents. Unlock new themes and settings that can change how many options you choose from or the difficulty of the AI. Hone your chess skills while you move up in the leaderboards and play unique scenarios of famous board states provided from some of the world's most active grandmasters. Lazy Chess is open source and available on GitHub. It was developed by Cinq-Mars Media, an educational non-profit with projects and games featured at E3, PAX and festivals worldwide.

About

Openings Mastermind

Master chess openings with this app. Import studies, explore with advanced engines, and practice specific lines through repetition. Track your progress and improve your game.

Highlights
  • Import Lichess Studies or PGNs
  • Explore openings with Stockfish 15
  • Practice openings by repetition
  • Smart practice queue
  • Track learning progress
Features
Read full description

Get ready to take your chess game to the next level with Openings Mastermind, the ultimate chess opening app! Some of the features include: - Import Lichess Studies or custom PGNs - Explore openings with Stockfish 17 and the Lichess position database - Practice openings by repetition against your own custom openings database - Take advantage of the smart practice queue and improve your learning - Observe your learning progress in different openings With our app, you can take your opening game to the next level by practicing against the specific lines you want to master. Whether you're a beginner or an experienced player, our app is the perfect tool to help you improve your opening moves and become a better chess player. Planned Features: - Continue against engine, after study line ends - Analysis of your games from Lichess and Chess.com compared to your openings database

Screenshots

Lazy Chess4 screens
Openings Mastermind4 screens

Verdict

The call

The clearest difference is in-app purchases: Openings Mastermind at none against Lazy Chess's 1. Openings Mastermind also leads on ads (none vs shown). Lazy Chess's advantage is ratings volume (67 vs 6) and iOS requirement (11.0 vs 18.6). On price, rating, review sentiment and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Lazy Chess sells 1 one-off in-app purchase. Openings Mastermind asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for Lazy Chess against 4.3 for Openings Mastermind. That said, the two scores are not equally well evidenced: Lazy Chess has 67 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 56% of Lazy Chess's written reviews are positive against 50% of Openings Mastermind's.

UpkeepUpdate frequency

Lazy Chess ships an update every 3 weeks, Openings Mastermind fortnightly. Both last shipped on September 19, 2026.

Scorecard5 real differences · 5 level
Lazy Chess versus Openings Mastermind: the parameters behind the verdict, then further details
ParameterLazy ChessOpenings Mastermind
PriceFreeFree
Rating4.4 (67 ratings) — better4.3 (6 ratings)
Positive reviews55.6% of reviews — better50.0% of reviews
Number of ratings67 — better6
Update frequencyEvery 3 weeksFortnightly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better18.6
Further details — not scored
Size35 MB88 MB
Age rating4+4+
DeveloperCinq-Mars MediaChristian Heise

Customer experience

Lazy Chess

All ratings67 ratings
Positive82.1%
Neutral6.0%
Negative11.9%
Written reviews18 reviews
Positive55.6%
Neutral16.7%
Negative27.8%

Openings Mastermind

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

1 purchases

Lazy Chess

One-time1
  • Ad Free + Full Game$2.99
None

Openings Mastermind

No in-app purchases

Questions

Is Lazy Chess free?
Lazy Chess is free to download, with in-app purchases available.
Is Openings Mastermind free?
Openings Mastermind is free to download, with no in-app purchases.
Which has better reviews, Lazy Chess or Openings Mastermind?
Lazy Chess is rated higher. Lazy Chess averages 4.4 out of 5 from 67 ratings, while Openings Mastermind averages 4.3 from 6 ratings.
Do Lazy Chess or Openings Mastermind have ads?
Lazy Chess shows ads; Openings Mastermind does not.
Which is updated more often, Lazy Chess or Openings Mastermind?
Lazy Chess ships an update every 3 weeks, and Openings Mastermind fortnightly. Most recently, Lazy Chess was updated on September 19, 2026 and Openings Mastermind on September 19, 2026.

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