2026 78th Idaho Open will take place on June 27-28, 2026 in Boise, Idaho, USA. This is a chess tournament in Boise, Idaho, USA, in 2026, and it offers a 5-round weekend Swiss with two sections at the Riverside Hotel. The event continues one of Idaho’s long-running open tournaments and gives players a compact but serious summer format.

The tournament suits ambitious club players, experienced weekend competitors, juniors, seniors, and improving players who want several rated games in only two days. Moreover, the structure stays clear, because the event uses an Open section and a dedicated U1400 section under standard US Chess rules.

The Boise setting also adds practical value to the weekend. In addition, 2026 78th Idaho Open combines a hotel venue, straightforward registration rules, and a clean prize structure, so it stands out as a solid late-June option for players across Idaho and the surrounding region.

📌 Event Details

🏆 Prize Fund

The confirmed cash prize fund for 2026 78th Idaho Open is USD 485. Therefore, the event offers clear rewards in both sections, while the overall winner also receives a plaque.

⏰ Time Control & Pairings

The tournament uses Game in 90 minutes with a 5-second increment from move one. As a result, the event fits the classical weekend Swiss category and gives players enough time for serious competitive play across all five rounds.

The organizers use a 5-round Swiss format. In addition, players may request one half-point bye in any round, although the request must be made before round 2 is paired. The published tie-break order is Solkoff, Cumulative, Cumulative Opposition, and Modified Median. The event also states that the Insufficient Losing Chances rule does not apply.

📂 Sections / Groups

🗓️ Schedule

📝 Registration

👤 Organizer

Idaho Chess Association organizes the tournament and manages player communication, registration, and local event logistics. Moreover, the association has a long-standing role in Idaho chess, so the event benefits from a familiar and established tournament structure.

• Email: idahochessassociation@gmail.com
• Phone: +1 208-518-9752
• Website: https://sites.google.com/view/idaho-chess-association/home

📍 Venue

Riverside Hotel, 2900 W Chinden Blvd., Boise, ID, USA

The Riverside Hotel serves as the official playing venue for 2026 78th Idaho Open. The hotel sits along the Boise River and gives the event a practical stay-and-play setting for a full weekend of chess.

🚗 How to Get There

The Riverside Hotel is easy to reach within the Boise area. It is about 5 miles from Boise Airport, and the property sits on West Chinden Boulevard near the Boise River. As a result, both local players and out-of-town visitors can reach the venue without much difficulty.

2026 78th Idaho Open is a strong choice for players who want a proven weekend format, clear section options, and a practical hotel venue in Boise.