OpeningTree vs Chess Opener Lite

OpeningTree is a chess openings book based on high rated over the board games that lets one explore the tree of openings and engine analysis is available. Chess game files can be shared with the app to check against the book or to just view. Users can make their own side line moves and back up to return to main line. Also includes ten classic game collections and users can import their own games into the app. Game list are also searchable by tags. The updated opening book is compiled from 640,000 high rated games from recent years with both players rated 2300 and over. Just touch moves in the list or make moves on the board to see what the response is. The numbers next to moves indicate how many games resulted in wins-draws-losses. The idea comes from computer opening books as if we can open up the book and see what those moves are that people play in response to opening positions. Users do not pick an opening to study but start with the full tree. The analyze button on bottom right of board is to flip between viewing the openings move table or seeing Crafty engine analysis. +1.00 score means white is ahead a pawn. -1.00 score means black is ahead a pawn. There is a move now button to make the engine play the current best move if the users wants to try playing a position out against the engine. OpeningTree's board is accessible to the blind and visually impaired using Voice Over. With Voice Over enabled in device settings, tap on a square for info, double tap to select. Or choose from three move methods. When going forward in a loaded PGN game, moves will be announced on each tap of the forward button. Moves can be marked with colors(red, green, yellow) and colorizing a move at the end of a line will extend the line i.e. add move so it shows later. There is also an option to make a note on a position using the control bar. In the Actions menu if the user has imported a chess games file to the App, for example by opening a PGN file with OpeningTree from a mail attachment or download(long touch on the attachment/download for this option), a game from a PGN file can be loaded and checked against the book. If a user makes a new move, back up to the main line to return to the game. To ensure speed, it will only read/load a max of 5000 games. With bigger files users will only see first 5000 games. There is a Save Board to PGN option on the Actions menu. It saves the current moves to openings-user-games.pgn, a file OpeningTree will create on first save. Games are saved with opening name as white and black name to spot the lines in each game. This allows the users to export data out of the App such as favorite lines with the mail games option when looking at a game list. The App comes with six PGN game files that can be optionally installed when no PGN files have yet been opened by the App or the user has deleted their PGN files previously opened and likewise has none to access. If this is the case, this option shows when going to Actions -> load PGN. The files contain a mix of famous classical games, collections of former world champions Gary Kasparov and Magnus Carlsen's games and more recent games from two top ranked international tournaments. PGN stands for portable game notation. It's a file extension that can be used with text files that contain chess games in the PGN format. PGN files can be read by apps to display the games in them. If a game is loaded in the App one can then go to 'Actions -> show game data' to view the raw PGN text.

Features: - Chess opening tree with game statistics - The Encyclopedia of Chess Openings (ECO) - Compare ECO and opening tree moves side by side in any position - Export chess openings in PGN format - Build your own opening repertoire - Add or edit comments on moves - Automatically classify any sequence of moves using the ECO system - Chess opening explorer highlights moves already in your repertoire - Chess database includes all transpositions - Interactive trainer to memorize your chess openings and variations - Train multiple variations at once against random opponent moves from your repertoire - Set up a starting position for training - Track your training progress - Customize chessboard colors and chess pieces - Supports dark mode - Works completely offline CHESS OPENING EXPLORER Search in the Encyclopedia of Chess Openings or browse the chess opening tree. Swipe left or right to switch between the exploration features in any position. BUILD YOUR OPENING REPERTOIRE Add your favorite opening lines to your repertoire using the chess opening explorer. You can always edit the names of your openings and organize them in your repertoire. OPENING TRAINER A simple and efficient method to memorize variations of openings in your repertoire. You can train either white’s moves or black’s moves only or both. Optionally, you can train all variations at once. The trainer chooses the opponent’s moves randomly from your opening repertoire. Chess Opener tracks your progress and shows your stats. Upgrade to Chess Opener PRO to unlock more features: - Unlimited repertoire size - Unlimited depth of openings - 6x larger opening tree with game statistics - Database of top 100+ grandmasters’ repertoires - Powerful chess engine analysis - Import openings in PGN format