In today's fast-paced life, nine-square grid games have become a casual choice for many people. This mini-game not only improves logical thinking, but also relaxes the mind. Next, let's dive into how to play the nine-square grid. Initial experience of the nine-square grid game Start by opening a 3x3 grid with a number in the middle as a starting point. This number can be arbitrary, but be careful how it relates to later calculations. In the game, each row, column, and diagonal number combination cannot be repeated. Given the complexity of the rules, you can try to start with the intersection of two rows or columns, which will help you determine the next step more quickly. Practical skills and strategies 1. Observe the overall situation: not only the current space, but also pay attention to whether the number to be filled in conflicts with other rows, columns, and diagonals. 2. Continuous filling method: If the adjacency of two numbers can be determined, the third number can be deduced from this. Such a continuum of nations not only greatly increases efficiency, but also reduces errors. 3 The method left by the ancestor: use the addition square matrix composed of 4 numbers to analyze the middle number, add the four numbers up, down, left and right, and the result is more convenient to find the direction and fill in the number with the square). Free Card Challenge In order to allow more friends to travel the nine-square grid, we have specially prepared a free card collection activity! click