Just like an actual analysis chessboard where you get to move the pieces around to play out a game or test a new attack. Since it is on a computer, you also get the benefit of Stockfish 8 engine analysis.

Obtain your copy of Stockfish at https://stockfishchess.org

****** Quick Start:

To reset the chessboard, click "FEN Import/Export" button, click "chessboard" button, click "reset" button, click "Use Board" button.

See https://play.google.com/store/apps/details?id=com.adamtai.chessfor2 for instructions on how to manually move chessmen on the chessboard.

****** Descriptions of the buttons:

|< < > >| = rewind/forward the current display ply count. Stockfish will analyze the board position and give you a score in CP or mate on top status bar.

TXT/LOG/PGN = switches between Tutorial Notes, Stockfish log, and PGN display.

Circular arrows = flips the board.

Stockfish = Ask Stockfish to move for player.

M# = selects Stockfish movement calculation depth.

FEN Import/Export = Share current board position, setup new board position (either via FEN or graphical chessboard editor)

PGN Import/Export = Share current PGN, import new PGN, or save/restore PGN.

PAC Import/Export = Share current PAC (Tutorial Pack), etc.

Picture of queen, knight, rook, bishop = manual movement pawn promotion piece.

Pencil = Edit the current tutorial.