Is Chess Perfect Information?

Yes. Chess is a perfect-information game because both players can see the board, pieces and position state.

Perfect information means no player has private knowledge about the current position that the other player cannot see.

Yes. Both players can see every piece on the board at all times.

Yes. The entire board is visible to both players.

No. Legal moves are not hidden, although a player may still need skill to notice them.

No. Chess has no hidden cards, private hands or concealed pieces.

No. The board position is public, although a player's plans and thoughts are not visible.

A player's plans are mentally private, but they are not hidden game-state information.

Yes. Poker has hidden cards, while chess has a fully visible board position.

Yes. Battleship hides ship locations, while chess shows all pieces and squares.

Position state includes piece placement, side to move, castling rights, en passant possibilities, clocks where used and draw-relevant move counts.

Yes. Castling rights are part of the legal position state and can be known from the game history.

No. En passant rights come from the previous move and are part of the visible legal position state.

Yes. Whose turn it is matters and is known to both players.

In normal play the move history is known or recorded, and it can affect rules such as castling, en passant and draw claims.

No. The information is visible, but calculating and evaluating it can still be very difficult.

No. Players can miss visible tactics, misunderstand plans or miscalculate.

No. The board is visible, but players can still be uncertain about the best move or the opponent's plan.

Chess is commonly described as a perfect-information game because the full game state is visible to both players.

Yes. The rules are deterministic because a legal move changes the board in a fixed way.

No. Standard chess has no dice rolls, shuffled decks or random events inside the rules.

No. Fog-of-war variants hide information, so they are not perfect-information games in the same way standard chess is.

Yes in rules, because the position is not hidden by the game; the difficulty is remembering and visualising it.

Yes. Online chess still shows the same board state to both players.

Yes. In timed games, clock times are visible and affect practical decisions.

It helps because nothing is hidden, but beginners still need to learn how to notice threats and legal moves.

They miss things because attention, pattern recognition, calculation and time pressure limit what they actually process.

Calculation, evaluation, pattern recognition, planning and clock control matter because the challenge is using visible information well.

The best answer is yes: standard chess is perfect information because both players can see the full position state.

Read the luck-or-skill page for variance or the calculation page for how players use visible information.