CT-ART 6.0. Complete Chess Tactics - Training Software The world's most recognized and effective chess tactics course, 2016 version! Largest Tactics combo available with over 10,000 exercises, 5 full courses Levels 1 - 9 [Rating 200-2400] New and improved Peshka 2.0 interface Works on any PC Windows XP, 7, 8, 10 ( 6 languages)