I just wanted to recommend this article, which I find really cool. The king's gambit is the chess opening defined by the moves 1.e4 e5. 2.f4 exf4. It used to be a very popular opening, but fell out of favor as the top chess players got better at playing it with the black pieces. According to a computer analysis that was recently carried out, the most popular move 3. Nf3 loses by force to 3. ...d6. Another popular move 3. Bc4 loses by force to 3. ...Nf6. The only way that white can avoid losing the game against perfect play is to play the strange-looking 3. Be2.