Oak Systems Leisure Software Ltd

Generate and enter/solve 4x4 to 16x16 Sudoku puzzles against the clock. Five levels of difficulty, number and letter puzzles. Play on your PC or print out. Best times roll of honour. Multiple skins and sound effects. Coaching aids.

Synchronize files from your PC with a backup location or removable media, such as a USB pen drive. Transfer files between two PCs, e.g. at work and home, without missing any that you updated.

Measure and improve your mental powers in the five key areas: verbal, numerical, logical, spatial and memory. Use our 40 different exercises to stretch your mind and track your progress with our daily tests.

Maths Trainer has 24 challenging activities to exercise your mental math skills. There are 12 practice activities, 8 Daily Test Activities and 4 Reward Games. Daily Progress Charting.

Play Kakuro on your PC. Unlimited puzzles at 5 levels of difficulty and 6 different grid sizes. Unique drop down tool to eliminate combinations.