docs/puzzle_themes.md

Name	Description
Advanced pawn	One of your pawns is deep into the opponent position, maybe threatening to promote.
Advantage	Seize your chance to get a decisive advantage. (200cp ≤ eval ≤ 600cp)
Anastasia's mate	A knight and rook or queen team up to trap the opposing king between the side of the board and a friendly piece.
Arabian mate	A knight and a rook team up to trap the opposing king on a corner of the board.
Attacking f2 or f7	An attack focusing on the f2 or f7 pawn, such as in the fried liver opening.
Attraction	An exchange or sacrifice encouraging or forcing an opponent piece to a square that allows a follow-up tactic.
Back rank mate	Checkmate the king on the home rank, when it is trapped there by its own pieces.
Bishop endgame	An endgame with only bishops and pawns.
Boden's mate	Two attacking bishops on criss-crossing diagonals deliver mate to a king obstructed by friendly pieces.
Castling	Bring the king to safety, and deploy the rook for attack.
Capture the defender	Removing a piece that is critical to defence of another piece, allowing the now undefended piece to be captured on a following move.
Crushing	Spot the opponent blunder to obtain a crushing advantage. (eval ≥ 600cp)
Double bishop mate	Two attacking bishops on adjacent diagonals deliver mate to a king obstructed by friendly pieces.
Dovetail mate	A queen delivers mate to an adjacent king, whose only two escape squares are obstructed by friendly pieces.
Equality	Come back from a losing position, and secure a draw or a balanced position. (eval ≤ 200cp)
Kingside attack	An attack of the opponent's king, after they castled on the king side.
Clearance	A move, often with tempo, that clears a square, file or diagonal for a follow-up tactical idea.
Defensive move	A precise move or sequence of moves that is needed to avoid losing material or another advantage.
Deflection	A move that distracts an opponent piece from another duty that it performs, such as guarding a key square. Sometimes also called "overloading".
Discovered attack	Moving a piece (such as a knight), that previously blocked an attack by a long range piece (such as a rook), out of the way of that piece.
Double check	Checking with two pieces at once, as a result of a discovered attack where both the moving piece and the unveiled piece attack the opponent's king.
Endgame	A tactic during the last phase of the game.
En passant	A tactic involving the en passant rule, where a pawn can capture an opponent pawn that has bypassed it using its initial two-square move.
Exposed king	A tactic involving a king with few defenders around it, often leading to checkmate.
Fork	A move where the moved piece attacks two opponent pieces at once.
Hanging piece	A tactic involving an opponent piece being undefended or insufficiently defended and free to capture.
Hook mate	Checkmate with a rook, knight, and pawn along with one enemy pawn to limit the enemy king's escape.
Interference	Moving a piece between two opponent pieces to leave one or both opponent pieces undefended, such as a knight on a defended square between two rooks.
Intermezzo	Instead of playing the expected move, first interpose another move posing an immediate threat that the opponent must answer. Also known as "Zwischenzug" or "In between".
Knight endgame	An endgame with only knights and pawns.
Long	Three moves to win.
Master games	Puzzles from games played by titled players.
Master vs Master games	Puzzles from games between two titled players.
Checkmate	Win the game with style.
Mate in 1	Deliver checkmate in one move.
Mate in 2	Deliver checkmate in two moves.
Mate in 3	Deliver checkmate in three moves.
Mate in 4	Deliver checkmate in four moves.
Mate in 5 or more	Figure out a long mating sequence.
Middlegame	A tactic during the second phase of the game.
One-move puzzle	A puzzle that is only one move long.
Opening	A tactic during the first phase of the game.
Pawn endgame	An endgame with only pawns.
Pin	A tactic involving pins, where a piece is unable to move without revealing an attack on a higher value piece.
Promotion	Promote one of your pawn to a queen or minor piece.
Queen endgame	An endgame with only queens and pawns.
Queen and Rook	An endgame with only queens, rooks and pawns.
Queenside attack	An attack of the opponent's king, after they castled on the queen side.
Quiet move	A move that does neither make a check or capture, nor an immediate threat to capture, but does prepare a more hidden unavoidable threat for a later move.
Rook endgame	An endgame with only rooks and pawns.
Sacrifice	A tactic involving giving up material in the short-term, to gain an advantage again after a forced sequence of moves.
Short	Two moves to win.
Skewer	A motif involving a high value piece being attacked, moving out the way, and allowing a lower value piece behind it to be captured or attacked, the inverse of a pin.
Smothered mate	A checkmate delivered by a knight in which the mated king is unable to move because it is surrounded (or smothered) by its own pieces.
Super GM games	Puzzles from games played by the best players in the world.
Trapped piece	A piece is unable to escape capture as it has limited moves.
Underpromotion	Promotion to a knight, bishop, or rook.
Very long	Four moves or more to win.
X-Ray attack	A piece attacks or defends a square, through an enemy piece.
Zugzwang	The opponent is limited in the moves they can make, and all moves worsen their position.
Healthy mix	A bit of everything. You don't know what to expect, so you remain ready for anything! Just like in real games.
Player games	Lookup puzzles generated from your games, or from another player's games.
Puzzle download information	These puzzles are in the public domain, and can be downloaded from %s.