Chess rules 1

Part 1 of this 8 part chess rules course aims to teach about the board and the coordinates. Briefly, the chess pieces are mentioned; other parts cover the chess pieces and the rules in full details. These other parts of the course are "Chess rules 2" till "Chess rules 8". The course aims to be a user-friendly, safe, commercial-free and motivating way to learn chess, step by step. Every course part exists of an explanation, followed by exercises. There is no exam, or track of score; it's perfectly ok to make as many errors as needed. Because of random selection of exercises, repetition may occur. Please be patient. Repitition is the mother of skill. Every part of the chess rules course is a separate app, which has been constructed with NativeScript technology (https://www.nativescript.org/).