Akademik

Задним умом всяк крепок

It is easy to say what should have been done after some trouble has taken place. See Догадался, как проигрался (Д), Задний ум хорош, да никуда не гож (3), Потом и Семен умен (П)

Var.: Русский мужик задним умом крепок

Cf: After the danger everyone is wise (Am.). After-wit is everybody's wit (Br.). Everybody is wise after the event (Br.). If things were to be done twice, all would be wise (Am., Br.). It is easy to be wise after the event (Am., r.). It is easy to prophesy after the event (Br.). We are all wise after the event (Br.)

Русско-английский словарь пословиц и поговорок. Академик.ру. 2013.