When Allan Gottlieb ’67 began editing the Puzzle Corner column in 1966, he was a junior at MIT, majoring in math. Little did he know then that he was undertaking a project that would last for nearly six decades. If you missed our previous celebrations of Allan, read our 2015 profile, “Puzzle Corner’s Keeper,” and watch the MIT Alumni Association’s video “The Puzzle Guy” from his 50th reunion.