Comparison

Encyclopedia 2 by Informant vs GPT Chess

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

Head to head
About

Encyclopedia 2 by Informant

This educational tool offers systematic chess training with intermediate-level combinations sorted by theme. It provides interactive lessons, hints, and explanations to help players improve their tactical skills and understanding of the game.

Highlights
  • Systematic chess combinations
  • Intermediate level training (ELO 2200)
  • Themed sorting of tactics
  • Interactive theoretical lessons
  • Hints and mistake refutations
  • Play against computer
  • Rating monitoring
Features
Read full description

Encyclopedia of Chess Combinations vol. 2 (ECC vol. 2) is the ultimate educational tool with systematic, carefully selected content for player with ELO 2200. The material is based on the latest edition of the eponymous bestselling book released by Chess Informant. This volume contains chess combination of Intermediate Level (ELO 2200) for solving, all hand-picked and sorted by theme to provide the most exciting and efficient training experience possible! Unlike disorganized, basic tactics you can learn all over the Internet, this Chess Sphinx will challenge you consistently and systematically, unveiling new intricacies right when you decide you have mastered that particular tactic. This course is in the series Chess King Learn (https://learn.chessking.com/), which is an unprecedented chess teaching method. In the series are included courses in tactics, strategy, openings, middle game, and endgame, split by levels from beginners to experienced players, and even professional players. With the help of this course, you can improve your chess knowledge, learn new tactical tricks and combinations, and consolidate the acquired knowledge into practice. The program acts as a coach who gives tasks to solve and helps to solve them if you get stuck. It will give you hints, explanations and show you even striking refutation of the mistakes you might make. The program also contains a theoretical section, which explains the methods of the game in a certain stage of the game, based on actual examples. The theory is presented in an interactive way, which means you can not only read the text of the lessons, but also to make moves on the board and work out unclear moves on the board. Advantages of the program: • High quality examples, all double-checked for correctness • You need to enter all key moves, required by the teacher • Different levels of complexity of the tasks • Various goals, which need to be reached in the problems • The program gives hint if an error is made • For typical mistaken moves, the refutation is shown • You can play out any position of the tasks against the computer • Interactive theoretical lessons • Structured table of contents • The program monitors the change in the rating (ELO) of the player during the learning process • Test mode with flexible settings • Possibility to bookmark favorite exercises • The application is adapted to the bigger screen of a tablet • The application does not require an internet connection The course includes a free part, in which you can test the program. Lessons offered in the free version is fully functional. They allow you to test the application in real world conditions before releasing the following topics: 1. Annihilation of defence 2. Blockade 3. Clearance 4. Deflection 5. Discovered attack 6. Pinning 7. Demolition of pawn structure 8. Decoy 9. Interference 10. Double attack

About

GPT Chess

Engage in chess matches against advanced AI models like ChatGPT and Gemini. Choose between standard rules or a chaotic no-rule mode where AI instructions dictate gameplay. The app features conversational AI during play and offers multiple AI strength levels.

Highlights
  • Play against ChatGPT and Gemini AI
  • Standard chess rules mode
  • No-rule chess mode with AI instructions
  • Multiple AI strength levels
  • Conversational AI during gameplay
  • Minimalist design
Features
Read full description

Play Chess with ChatGPT (OpenAI, GPT 3.5 or GPT 4) or GeminiPro (Google). There are two modes: (A) The standard mode, both you and the AI would follow the standard chess rule, so no illegal move! You can choose between: 1. The native ChatGPT4 API (weakest chess player); 2. Prompt improved GPT4 API (e.g. better chess player); 3. Enhanced backend chess calculation API call with GPT4 (i.e. strongest chess player). (B) The No-Rule chess mode.  In this mode, we strictly follow the instruction provided by ChatGPT AI to make the move. Enjoy a chaotic and hilarious chess game. Don't be surprise if AI makes illegal moves, captures its own piece, generates random pieces, and suicides. :) You can choose different LLM AI: 1. GPT 3.5 (OpenAI); 2. GPT 4 (OpenAI); 3. Gemini Pro from Google. A minimalist design, just start to play, that simple. Also, the ChatGPT will talk to you during the play! Come and see if you can beat the ChatGPT in chess! Link to standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: http://lwdevstudio.github.io/privacy-info.html

Screenshots

Encyclopedia 2 by Informant4 screens
GPT Chess3 screens

Verdict

The call

The clearest difference is review sentiment: Encyclopedia 2 by Informant at 100% against GPT Chess's 33%. Encyclopedia 2 by Informant also leads on rating (4.9 vs 4.2) and iOS requirement (8.0 vs 16.0). GPT Chess's advantage is update cadence (every 9 days vs every 4 months). On price, ratings volume, ads and in-app purchases 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. Encyclopedia 2 by Informant sells 1 one-off in-app purchase and GPT Chess sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Encyclopedia 2 by Informant holds the better App Store score, 4.9 against 4.2. Both are backed by a comparable volume of ratings — 15 and 17 respectively. Written reviews point the same way: 100% of Encyclopedia 2 by Informant's written reviews are positive against 33% of GPT Chess's.

UpkeepUpdate frequency

Encyclopedia 2 by Informant ships an update every 4 months, GPT Chess every 9 days. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
Encyclopedia 2 by Informant versus GPT Chess: the parameters behind the verdict, then further details
ParameterEncyclopedia 2 by InformantGPT Chess
PriceFreeFree
Rating4.9 (15 ratings) — better4.2 (17 ratings)
Positive reviews100.0% of reviews — better33.3% of reviews
Number of ratings1517 — better
Update frequencyEvery 4 monthsEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better16.0
Further details — not scored
Size44 MB88 MB
Age rating4+4+
DeveloperChess KingFusionX Tech LLC

Customer experience

Encyclopedia 2 by Informant

All ratings15 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

GPT Chess

All ratings16 ratings
Positive75.0%
Neutral12.5%
Negative12.5%
Written reviews6 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

In-app purchases

1 purchases

Encyclopedia 2 by Informant

One-time1
  • Full Course$9.99
1 purchases

GPT Chess

Subscriptions1
  • Unlimited APIs3 Days trial$1.991 Month

Questions

Is Encyclopedia 2 by Informant free?
Encyclopedia 2 by Informant is free to download, with in-app purchases available.
Is GPT Chess free?
GPT Chess is free to download, with in-app purchases available.
Which has better reviews, Encyclopedia 2 by Informant or GPT Chess?
Encyclopedia 2 by Informant is rated higher. Encyclopedia 2 by Informant averages 4.9 out of 5 from 15 ratings, while GPT Chess averages 4.2 from 17 ratings.
Do Encyclopedia 2 by Informant or GPT Chess have ads?
Neither Encyclopedia 2 by Informant nor GPT Chess shows ads.
Which is updated more often, Encyclopedia 2 by Informant or GPT Chess?
Encyclopedia 2 by Informant ships an update every 4 months, and GPT Chess every 9 days. Most recently, Encyclopedia 2 by Informant was updated on November 2, 2026 and GPT Chess on October 30, 2026.

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