Blokus board game : an open-source Android implementation of the popular game. Smooth Drag & Drop user interface.Blokus is a family game involving four players and a board with 20 x 20 squares. Like chess or checkers, it’s a game for which at any time you can see your opponent’s pieces.The software do not have unobtrusive banner advertising. Once installed, you can play offline.Each player starts with 21 pieces : 1 monomino, 1 domono, 2 triominos, 5 tetraminos and 12 pentaminos. It may recall you the Tetris polyominos…"For first round, I must place a piece so that it touches one of the corners of the board""Next, a piece must be placed so that it touches a corner of one of my own pieces.It may touch several corners, but never any side/edge of my pieces!" Look at screenshots or at the video.The game has a nice and natural User Interface : just Drag & Drop the piece with the finger. Rotate a piece likewise. You can flip a piece to its mirror position with a long-press gesture."If a cannot place any more piece I pass my turn."You can see opponent’s remaining pieces, by pressing corresponding tab. The end of the game is reached when every player passes."My score is : addition of the squares of the pieces I placed".Refer to ‘Menu > Help’ inside the app. With several screenshots.You can safely quit at any time : your current game will be restored on next startup.You play against the machine. You can configure the level of corresponding Artificial Intelligence : 4 levels. Refer to Menu > PreferencesTo play against a friend, you can disable AI. Go to Menu > Preferences. Later use the 4 tabs at the bottom to select next player.This software is open-source, available at https://github.com/scoutant/blokish. You may reuse the code, conforming to GPLv3 licence.If you have a tablet have a look at my newly released game : Chinese Checkers HD/Tablet.