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A fire has broken out at the Hyatt Regency hotel in Chennai, the venue of the Quantbox Chennai Grand Masters 2025. All players are safe, but had to be relocated temporary to another hotel. The round has been postponed for a day and the Quantbox Chennai Grand Masters will start Thursday August 7.

Recent: Earthquake postponed the round in Oskemen

The Freestyle Chess Grand Slam South Africa will be held in Cape Town, South Africa, from December 5th to 12th, 2025, as part of a year-long tour. This event marks the final leg of the tour, which will also include tournaments in Weissenhaus, Paris, Grenke, and Las Vegas.

The V Mindsports International 2025 is taking place August 13 – August 18 in London, England. It is a 9 round Swiss system tournament with time control 90 min / 40 moves + 15 min + 30 sec /move. For more events fromEngland, check out The European Chess Calendar, which is part of The Chess Calendar.

The 22. RLP Senior Open 2025 is taking place August 12 – August 20 in Altenkirchen, Germany. It is a 9 round Swiss system tournament with time control 90 min / 40 moves + 30 min + 30 sec /move. For more events from Germany, check out The European Chess Calendar, which is part of The Chess Calendar.

The I. Arpad-Hazi Jolan Fide Tournament 2025 is taking place August 11 – August 17 in Hungary, Esztergom. It is a 10 round Swiss system tournament with time control 90 min + 30 sec /move. For more events from Hungary, check out The European Chess Calendar, which is part of The Chess Calendar.

The XXXII IRT Internacional Feria de las Flores 2025 is taking place August 06 – August 10 in Medellín, Colombia. It is a 9 round Swiss system tournament with time control 90 min + 30 sec /move. For more events from Colombia, check out The South Americna Chess Calendar, which is part of The Chess Calendar.

The 2025 Chinese Chess League Division B is taking place August 06 – August 11 in Daqing, China. It is a 9 round team Swiss system tournament with time control 90 min + 30 sec /move. For more events from China, check out The Asian Chess Calendar, which is part of The Chess Calendar.

Day 1 of Kaggle Arena IA chess saw Grok, o3, o4-mini, and Gemini 2,5 pro qualify for the semifinals of the competitions. All matches finished with a clean sweep 4-0

o4-mini (OpenAI) vs DeepSeek R1 – 4:0
Kimi k2 (Moonshot AI) vs o3 (OpenAI) – 0:4
Gemini 2.5 Pro (Google) vs Claude 4 Opus (Anthropic) 4:0
Grok 4 (xAI) vs Gemini 2.5 Flash (Google) 4:0

Next round will see o4 vs o3-mini and Grok vs Gemini 2.5 Pro. Follow the games live here

The Top Chess Engine Championship (TCEC) is the premier computer chess tournament that has been running since 2010, often considered the unofficial World Computer Chess Championship due to its strong lineup of chess engines and high-end hardware. Organized by Chessdom.com, TCEC aims to showcase high-quality, long time control chess matches between top chess engines, broadcast live 24/7 on its official website, Twitch, and platforms like Lichess.

Currently, TCEC is in its season 28 and you can follow the Premier Division live here

Kaggle Game Arena is starting with an AI exhibition chess tournament. A unique and powerful approach to understanding AI capabilities, Kaggle Game Arena, in partnership with Google DeepMind, announced a new platform where leading AI models will compete head-to-head in chess and other games. It will feature Kimi k2 (Moonshot AI), Gemini 2.5 Pro (Google), Gemini 2.5 Flash (Google), o3 (OpenAI), o4-mini (OpenAI), Claude 4 Opus (Anthropic), Grok 4 (xAI), and DeepSeek R1.