第18堂主題課程：六目死活

https://youtu.be/IcU3cR5VF0E

https://www.101weiqi.com/chessbook/notation/43238/

https://www.101weiqi.com/chessbook/notation/43239/

https://www.101weiqi.com/chessbook/notation/43241/

https://www.101weiqi.com/chessbook/notation/43242/

https://www.101weiqi.com/chessbook/notation/43244/

https://www.101weiqi.com/chessbook/notation/43246/

https://www.101weiqi.com/chessbook/notation/43247/

https://www.101weiqi.com/chessbook/notation/43248/

https://www.101weiqi.com/chessbook/notation/43249/

https://www.101weiqi.com/chessbook/notation/43250/

https://www.101weiqi.com/chessbook/notation/43251/