The brain of chess players is greatly influenced by patterns: typical structures of pieces or pawns that they have seen games played, perhaps many years ago, that they can remember consciously or unconsciously; The latter is what we call intuition, which we can define as unconscious memory.
The intuition of Thorfinnsson, a high-level Icelandic amateur, but practically unknown outside his country, worked very well on May 16, 2015. He knew that in the type of structure he had on the board it is common to sacrifice a bishop against the castling of the rival. But he soon saw that the traditional form of that sacrifice did not work in that particular position, it would be suicide. However, far from giving up and thinking about something else, Thorfinnsson delved deeper into the pattern, looked for creative ways to adapt it, trusted his intuition, accepted the high risk… and thus created a small work of art.