Practice a variety of well organized endgames. From the most elementary to the most complex you can practice until you master all the engame types.
The application organizes the positions in basics (queen a rook two rooks) pawns bishops knights rooks and queen. For each type it provides multiple positions to practice.
Do you resist the endings with two bishops or pawns ...? Now you can practice those endings that are more difficult to master them all forever.
It includes 3384 positions organized into 8 categories and 129 subcategories so you can easily find the type of endgame you want to practice.

Play against the syzygy tablebases or against the stockfish engine - when there are more than 7 pieces.

The application records your personal record in each position. It also allows you to solve each position automatically and review the movements once completed.

It includes challenges of mate and also of draw for both white and black.

Save configurations and progress to avoid losing them (to Google Drive).

When reaching a trivial position it doesn't force you to solve it manually (it prompts you to resolve those last moves automatically without penalizing you for it).

Updated to Stockfish 16 NNUE.

Parameterize Stockfish by depth and time.

Better use of Syzygy/Stockfish.

List of moves: allows you to select a move and continue another line from there.

Manual mode: to move opponent's pieces to explore lines not suggested by syzygy or Stockfish: "what if...?"

Uses the chessground board which allows you to draw circles and arrows.

Board image capture.

Copy FEN and PGN to clipboard.

Button to open position analysis on Lichess.