Senior Chess is a free Android chess program developed by Leen Ammeraal. It is a simple yet strong chess program that supports both landscape and portrait orientations. One of the best features of Senior Chess is that it allows players to adjust the play level arbitrarily, making it suitable for both beginners and advanced players.

Senior Chess has a unique feature that sets a suitable relative frequency%) of "odd moves" that the app will produce instead of normal, strong moves. This feature makes Senior Chess especially interesting for moderate level players who don't want to lose every game. Even if you are an absolute beginner, you can win by letting 100% of all moves be weak ones. Senior Chess is also ad-free and supports opening games from a file, which is accompanied by an animation of the game. With version 1.63 and higher, players can use a pre-defined set of test positions, making it easier to practice and improve their skills.