Correct

碰劲儿

/ pèng jìnr /
Strokes

Example

As an Adverb

accidentally; by chance/coincidence

1
xià
de
hǎo
不好
  
,
zhǐshì
只是
pèng
jìnr  
劲儿
yíng
le
  

I'm not a good chess player; I won only by luck.

2
Pèng
jìnr  
劲儿
zhòng
打中
le
qiāng

shoot/hit the target by chance