幸亏朴永训没有及时发现，逃过一劫。
Luckily , Park Yeonghun didn 't find it , and let Chang have a narrow escape .
可以学习一下小林光一、俞斌、李昌镐、朴永训的棋谱，体会他们的思路。
Study games , played by Kobayashi Koichi , Yu Bin , Lee Changho , Paek Yeonghun and follow their ideas .
朴永训