Igo Shinan '91 is part of a series of Igo (Go) games released for the NES in Japan. This particular installment likely offers features similar to other Igo games available on the system.  As a '91 release, it marks one version in an ongoing series.   The gameplay focuses on the core strategic elements of Igo, offering various difficulty levels or modes of play.  The game's existence further demonstrates the versatility and appeal of the NES in hosting more complex strategic games outside the typical action and adventure genres.

Igo Shinan '91 (Japan)