Chess analysis board
Play moves on the board and the engine evaluates every position — the eval bar, best move, and principal variation update as you explore. No signup, no daily limit. Paste a FEN below the board to jump to any position.
Load a famous game
Click a game to load it into the board above. Each is a real, classic game worth studying move by move.
Morphy's Opera Game
Morphy vs Duke of Brunswick & Count Isouard
Paul Morphy's famous 1858 miniature — a textbook attacking masterpiece.
1-0
Anderssen's Evergreen
Adolf Anderssen vs Jean Dufresne
Adolf Anderssen's 1852 immortal — one of the most beautiful combinations ever played.
1-0
Anderssen's Immortal Game
Adolf Anderssen vs Lionel Kieseritzky
Anderssen sacrificed a rook, a bishop, and both knights — then mated with the pieces he had left.
1-0
Kasparov vs Topalov, 1999
Garry Kasparov vs Veselin Topalov
Kasparov sacrificed his rook on d4 and hunted the king across the board in one of the greatest attacking games ever.
1-0
Fool's Mate (fastest checkmate)
Beginner A vs Beginner B
The shortest possible game — White walks into a queen mate in two moves.
0-1
Scholar's Mate
White vs Black
The classic four-move checkmate every beginner learns — and learns to stop.
1-0
Try a puzzle
Each puzzle drops you into a position. Solve it on the board — the engine will tell you if you found the right move.
Back Rank Mate
The king is stuck behind its own pawns. Find the mate.
White to move
Smothered Mate
The king is trapped by its own pieces. Sacrifice to deliver mate.
White to move
Win the Queen with a Pin
The queen is pinned to the king. Hit it with a lower-value piece.
Black to move
Royal Fork
Find the move that attacks both the king and queen at once.
White to move
Win a Hanging Piece
Something is left undefended. Grab it.
White to move
Mate in One
One move delivers checkmate. Find it.
White to move
The board is only as useful as the position you put in it
It will evaluate anything you paste, but it cannot tell you which of your own positions were worth pasting. Import from Chess.com or Lichess and OnlineChess finds the moves you keep repeating, what each has scored across your games, and which leak to fix first.