Features 1、Beech wood is dense, with fine and straight wood grain, eco‑friendly water‑based paint. 2、Enhance children's logical thinking ability in the process of reasoning and thinking, and enjoy the sense of accomplishment after solving problems. 3、It is made of high‑quality beech wood material, non‑toxic, safe and durable, suitable for children to play. 4、Interesting early education toys help develop children's logical thinking and attention. 5、Perform arithmetic operations with children to enhance parent‑child interaction and communication, and improve children's intellectual development. 6、Lightweight and portable, easy to carry and store, it is a great gift for children. Specification Condition: 100% Brand New Item Type: Chess Game Material: Beech Function: Interesting early educational chess toys, help to cultivate children's logical thinking and attention. Size: Approx. 22.3 x 22.3 x 3.2cm / 8.8 x 8.8 x 1.3in (manual measurement, for reference only) Steps for Usage: 1. Set up questions: Use the black side of the chess to set up questions, and beginners can follow the instructions. 2. Rule: According to the known numbers on the 9×9 disk, all the numbers in the remaining spaces are inferred, and the numbers in each row, column, and each bold line must contain 1-9, without repetition. Every qualified question has and has an answer. 3. Completion: Look at the instructions to check whether the answer is correct. Package List 1 x Chess Box with Drawer (Can be divided into two halves) 81 x Digital Wooden Block 1 x Manual 1 x White sticker Can be Pasted