Comparison

Reconnaissance Blind Chess vs SSAcademy

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

Head to head
About

Reconnaissance Blind Chess

This app offers a unique chess variant where players cannot see their opponent's pieces. Utilize private sensing actions to gather information and strategize your moves. Compete in ranked or unranked games against AI bots.

Highlights
  • Imperfect information gameplay
  • Private sensing actions
  • Ranked and unranked game modes
  • AI bot opponents
  • Capture-based win condition
  • Time-based win condition
Features
Read full description

The Reconnaissance Blind Chess (RBC) variant was invented in 2015 at JHU/APL as an experimentation platform to study artificial intelligence (AI). RBC includes imperfect information, long-term strategy, explicit observations, and very little common knowledge between opponents. In the RBC variant, the opponents cannot see each other’s pieces but can learn about them through private, explicit sensing actions. In unranked RBC games, the player plays with a guest account. They choose their opponent from a list of available bots and select their color (white or black). An unranked RBC game will not affect the player's rating. In ranked RBC games, the player logs in with their RBC account credentials, and their opponent and color are chosen at random. It may take a few seconds to be matched up against an opponent. A ranked RBC game will affect the player's rating. Game Rules: Reconnaissance Blind Chess (RBC) was intentionally designed to keep the game as close to traditional chess as possible while adding an appropriate amount of uncertainty and explicit sensing. RBC is like chess but includes the following core differences: A player cannot see their opponent's pieces. Prior to making each move, a player selects a 3×3 region of the chess board (via green outline on the relevant squares) to “sense” the pieces in that region. The player is informed of the true piece configuration within the sensed 3×3 region. The opponent is not informed about where the player sensed. When a player captures a piece, they are informed (via red outline on the relevant square) that they made a capture, but they are not informed about what piece they captured. When a player's piece is captured, they are informed (via red outline on the relevant square) that their piece was captured, but they are not informed about what piece captured it. There is no notion of check or mate because neither player can be definitively aware of any check relationship. A player wins by capturing the opponent's king or when the opponent runs out of time. Each player begins with a cumulative 15-minute clock to make all their moves. If a player tries to move a sliding piece through an opponent's piece, the opponent's piece is captured and the moved piece is stopped where the capture occurred. The moving player is notified of the square where the piece landed (via red outline on the relevant square), and both players are notified of the capture in the manner stated above. If a player attempts to make an illegal move, such as a pawn diagonally to an empty square, or a pawn forward to an occupied square, or a castle through an interposing piece, they are notified that the move did not succeed and their turn is over. However, castling through check is allowed because the notion of check is removed. There is a "pass" option that a player can select if they prefer to make no move during their turn. A player has access to reserve pieces that they can drag on and off the board to better visualize the state of the board, based on their belief of where their opponent's pieces are located. The turn tracker informs the player when it is their turn to sense and move, and when it is the opponent's turn.

About

SSAcademy

Master chess with this comprehensive platform designed for all skill levels. Learn the basics, refine your strategy, and unlock your full potential with tailored resources.

Highlights
  • Chess mastery platform
  • Resources for all levels
  • Beginner to advanced content
  • Strategy refinement
  • Unlock chess potential
Features
Read full description

Sri Chess Academy: Your Gateway to Chess Mastery! Unlock your chess potential with Sri Chess Academy, the ultimate platform for chess enthusiasts of all levels. Whether you're a beginner aiming to learn the basics or an advanced player striving to refine your strategy, our app offers comprehensive resources tailored to your needs.

Screenshots

Reconnaissance Blind Chess4 screens
SSAcademy4 screens

Verdict

The call

The clearest difference is update cadence: SSAcademy at weekly against Reconnaissance Blind Chess's every 32 months. Reconnaissance Blind Chess's advantage is iOS requirement (14.0 vs 18.2). On price, rating, ratings volume and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Reconnaissance Blind Chess against 5.0 for SSAcademy. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

UpkeepUpdate frequency

Reconnaissance Blind Chess ships an update every 32 months, SSAcademy weekly. The most recent releases landed on October 23, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 8 level
Reconnaissance Blind Chess versus SSAcademy: the parameters behind the verdict, then further details
ParameterReconnaissance Blind ChessSSAcademy
PriceFreeFree
Rating5.0 (4 ratings)5.0 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings4 — better2
Update frequencyEvery 32 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better18.2
Further details — not scored
Size22 MB1 MB
Age rating4+17+
DeveloperJohns Hopkins University Applied Physics LaboratorySridhar Seshadri

Customer experience

Reconnaissance Blind Chess

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

SSAcademy

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Reconnaissance Blind Chess

No in-app purchases

None

SSAcademy

No in-app purchases

Questions

Is Reconnaissance Blind Chess free?
Reconnaissance Blind Chess is free to download, with no in-app purchases.
Is SSAcademy free?
SSAcademy is free to download, with no in-app purchases.
Which has better reviews, Reconnaissance Blind Chess or SSAcademy?
Reconnaissance Blind Chess and SSAcademy are both rated 5.0 out of 5 on the App Store, from 4 and 2 ratings respectively.
Do Reconnaissance Blind Chess or SSAcademy have ads?
Neither Reconnaissance Blind Chess nor SSAcademy shows ads.
Which is updated more often, Reconnaissance Blind Chess or SSAcademy?
Reconnaissance Blind Chess ships an update every 32 months, and SSAcademy weekly. Most recently, Reconnaissance Blind Chess was updated on October 23, 2026 and SSAcademy on October 7, 2026.

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