Nanda Hanief Y, . S, Nanda Hanief Y, Fatkhu Royana I. Development of an Interactive PowerPoint for Training Early Age Athletes in Chess Openings. KSS [Internet]. 2022 Dec. 21 [cited 2025 Jul. 19];7(19):675–690. Available from: https://knepublishing.com/index.php/KnE-Social/article/view/12486