Kyuuri, a cucumber card game

Kyuuri (Cucumber in Japanese) is a quick trick game may played as lightly or seriously as you wish.
The app is for solo play of trick take card game with two to six AI players coded in the program. Nominal game play requires 2 minutes to 10 minutes depending on opponents selection. The game rule refers to "Cucumber" section of The Penguin Encyclopedia of Card Games but modified for solo video game.