Patrick Wolff, twice U.S. chess champion, will play all comers blindfolded in the mall at Berkshire's 2002 annual meeting weekend.

True: contemporaneous evidence shows Patrick Wolff was at the mall (the Berkshire shareholder shopping/exhibit area) during the 2002 annual meeting weekend (around 4–5 May 2002) and played visitors at chess blindfolded. Mostly true: he appeared and played all comers blindfolded, but a minor detail differs, such as the day or the exact location within the meeting venue. Mostly false: he appeared but did not play blindfolded (for example, he played sighted games only), or the blindfold exhibition took place outside the 2002 meeting weekend. False: dated evidence (Buffett's 2003 letter, meeting reports, or Wolff's own account) shows he did not appear at the 2002 meeting weekend, or the event was cancelled.

Set before the research began.

1. E1 2003Shareholder Letter berkshireletters.com (hosts Berkshire Hathaway shareholder letters) · 27 February 2004 Own record

   “Additionally, Patrick Wolff, twice U.S. chess champion, will be in the mall, taking on all comers — blindfolded! I’ve watched, and he doesn’t peek.”

2. E2 2003Shareholder Letter berkshireletters.com · 27 February 2004 Own record

   “In the mall outside of Borsheim’s, we will have Bob Hamman and Sharon Osberg, two of the world’s top bridge experts, available to play with our shareholders on Sunday afternoon. Additionally, Patrick Wolff, twice U.S. chess champion, will be in the mall, taking on all comers — blindfolded! I’ve watched, and he doesn’t peek.”

3. E3 2002Annual Meeting berkshireletters.com · 1 May 2002 Own record

   “represented at this meeting by proxies returned through Thursday evening, May 2nd.”

4. E4 Patrick Wolff Wikipedia

   “Over the past several years, Wolff has given a blindfolded simultaneous exhibition for all comers at the annual Berkshire Hathaway shareholder meeting in Omaha, Nebraska which were attended by former CEO Warren Buffett and former Vice-Chairman Charlie Munger.”

5. E5 2002 Annual Meeting Information Berkshire Hathaway Inc. · 6 May 2002 Own record

   “The 2002 Berkshire Hathaway Inc. Annual Shareholders Meeting was held in Omaha, Nebraska on Saturday May 4, 2002.”

E6 confirms that the 2002 Berkshire annual meeting took place in Omaha on 4 May 2002, but it does not mention Patrick Wolff or a chess exhibition. In E1/E2, the 2003 letter (written February 2004) announces Wolff for the next meeting and says "I've watched, and he doesn't peek." That suggests he played blindfolded at some earlier meeting, but it does not name 2002. E5 (Wikipedia) says he gave blindfolded exhibitions at Berkshire meetings "over the past several years" without naming 2002, so no evidence places him in the mall during the 2002 meeting weekend.