This Chess app runs its rules engine and AI in your browser and needs JavaScript. / 本站的国际象棋规则引擎与 AI 在浏览器中运行，需要启用 JavaScript。
Skip to content
♞
Chess
chess.ningh.org
EN
中
Home
Play
Learn
← Lessons
16.1 · Build the Lucena Bridge
Intermediate
Step 1 / 2
a
a
b
b
c
c
d
d
e
e
f
f
g
g
h
h
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1