Play Chess Online for Free
Chess on Classic Play Games is the full game, not a stripped-down version: castling, en passant, and underpromotion are all here, and a draw can arrive by stalemate, threefold repetition, the 50-move rule, or insufficient material. You play on the standard 8x8 board with queens starting on d1 and d8. Face a built-in engine across three strengths or hand the device to a friend for a local two-player match. The board runs right in your browser with no download, and an undo button lets you take back a slip while you learn.
How to Play Chess
Each side commands 16 pieces on an 8x8 board: a king, a queen, two rooks, two bishops, two knights, and eight pawns, set up with the queen on her own color. Pieces move as in standard chess, rooks along ranks and files, bishops on diagonals, the queen on both, knights in an L-shape that jumps over pieces, the king one square in any direction, and pawns forward (one square, or two from their starting rank) while capturing diagonally. White moves first and players alternate turns.
You win by checkmate: attacking the enemy king so that it cannot move to safety, block the attack, or capture the attacker. Notably, you never actually capture a king in this engine; the game ends the instant a side in check has no legal reply. All three special moves are supported: castling (the king slides two squares toward an unmoved rook, which hops to the king's other side, only when nothing stands between them, the king is not in check, and the squares it crosses are not attacked), en passant, and pawn promotion when a pawn reaches the far rank.
A game is drawn by stalemate (the side to move has no legal move but is not in check), by threefold repetition (the same position arises for the third time with the same side to move), by the 50-move rule (50 moves by each side with no capture and no pawn move), or by insufficient material such as king versus king or king and a single bishop or knight versus king. When you promote a pawn you may choose a queen, rook, bishop, or knight. While you practice against the computer, the undo button takes back your last move together with the computer's reply.
Playing Against the Computer
The computer plays at three levels. All of them use the same evaluation and think for a limited time on each move. Easy thinks only briefly and picks at random among its four best moves, so sound development and an eye for its slips are enough to beat it. Medium thinks longer and picks between its two best moves, so quiet, solid play converts its mistakes. Hard thinks longest, always plays the best move it finds, and prefers faster checkmates: against it, avoid weaknesses, trade down only when ahead, and set up real threats rather than hoping for a gift.
The engine counts material with fixed weights (pawn 1, knight 3.2, bishop 3.3, rook 5, queen 9) and rewards knights and bishops on active central squares, so it grabs the center if you let it and almost never hangs a piece on Medium or Hard. Its search looks at captures first, which makes your undefended pieces the first thing it finds. What it misses are tactics deeper than its search: forks, pins, skewers, and discovered attacks.
Frequently Asked Questions
Is castling allowed, and when is it blocked?
Yes. You castle by moving the king two squares toward an unmoved rook. It is blocked if the king or that rook has already moved, if any square between them is occupied, if your king is currently in check, or if the king would pass through or land on a square attacked by the opponent.
Can I promote a pawn to something other than a queen?
Yes. When a pawn reaches the far rank you may choose a queen, rook, bishop, or knight. Underpromotion to a knight is occasionally useful because a knight delivers checks and forks a queen cannot.
Does this chess game support en passant captures?
Yes. If your pawn is on its fifth rank and an enemy pawn moves two squares to land directly beside it, you may capture that pawn as if it had moved only one square, but only on the very next move.
Why was my game called a draw when I still had pieces?
The engine draws on stalemate (you have no legal move but are not in check), threefold repetition (the same position for the third time), the 50-move rule (50 moves each with no capture or pawn move), or insufficient material such as king and a lone bishop or knight versus a bare king. A single minor piece simply cannot force checkmate.
How hard is the computer on the Hard setting?
Hard thinks the longest of the three levels, searches as deep as its time allows, and always plays the best move it finds, so it punishes hanging pieces and prefers the quickest checkmate. Easy thinks only briefly and picks at random among its four best moves, making it ideal for learning. No level walks into a checkmate it can see or passes up one it can deliver.