What is Tunnel Vision in Chess?

Tunnel vision in chess refers to a cognitive bias where a player becomes overly focused on a specific area of the board, a particular plan, or a single piece, often at the expense of considering the broader position and other potential threats or opportunities. This narrow focus can lead to missing important moves, tactics, or strategic considerations, ultimately resulting in suboptimal play or even blunders. It's crucial for chess players to maintain a wide scope of attention, continually reassessing the entire board to avoid tunnel vision and make well-rounded decisions.

During a recent game, my opponent placed their white Rook on g4. I was baffled, thinking, "Why would he/she place the Rook there just to have it captured?" Caught in the grips of tunnel vision, I seized the Rook with my black Queen, only to realize, too late, the white Bishop lurking on h7. The oversight was so glaring that I resigned instantly.

The memory of this game is etched in my mind, a vivid reminder of how tunnel vision can cloud judgment. This wasn't my first experience with tunnel vision, but this particular loss motivated me to develop a tunnel vision prevention application.