https://www.david-duval.com/blog/ David DuVal is a software founder and product builder behind Dance Studio Manager, practical business software, and long-running online communities. en-us Wed, 12 Aug 2026 23:10:03 +0000 https://www.david-duval.com/morph-chess-rules/ https://www.david-duval.com/morph-chess-rules/ Sat, 04 Jul 2026 17:58:05 +0000  I made a new chess variant called Morph Chess, and you can play Morph Chess against the computer here. The board starts from a normal chess setup, but almost every move changes the identity of the piece that moved. Kings are… https://www.david-duval.com/still-building-a-professional-update/ https://www.david-duval.com/still-building-a-professional-update/ Mon, 22 Jun 2026 18:13:09 +0000 I realized recently that I have not written much publicly about what I have been working on, even though behind the scenes this has been one of the more active periods I have had in years. For a long time, my work… https://www.david-duval.com/why-ai-will-not-replace-humans-anytime-soon/ https://www.david-duval.com/why-ai-will-not-replace-humans-anytime-soon/ Fri, 26 Sep 2025 16:01:35 +0000 Here’s your text with only typos and awkward sentences corrected. I preserved your style and phrasing as much as possible. Corrected Version AI will be dependent on humans for a long time, and it’s not going to take over anytime soon, but… https://www.david-duval.com/coding-big-projects-with-ai/ https://www.david-duval.com/coding-big-projects-with-ai/ Thu, 14 Aug 2025 23:10:06 +0000 A common complaint about people who want to do “vibe coding” — which is basically using AI to write code interactively — is that once the project reaches a certain level of complexity, usually over 1,000 lines of code or so, the… https://www.david-duval.com/dao-de-jing-translated/ https://www.david-duval.com/dao-de-jing-translated/ Fri, 01 Aug 2025 18:21:00 +0000 The Dao De Jing is a writing that can be interpreted in many ways and each time you read it you may find that you see it in a different way. It’s an interesting concept to think that as soon as we… https://www.david-duval.com/why-i-settle-in-a-less-developed-country/ https://www.david-duval.com/why-i-settle-in-a-less-developed-country/ Fri, 01 Aug 2025 13:21:50 +0000 Well, I still plan to spend plenty of time in the United States in the years. I also want to spend some time and other places like Thailand and China, as well as Eastern Europe. People often ask me why I would… https://www.david-duval.com/bill-and-bobbie-irvine-the-ballroom-elite-legends/ https://www.david-duval.com/bill-and-bobbie-irvine-the-ballroom-elite-legends/ Sat, 31 May 2025 04:57:24 +0000 Ballroom Elite Legends honors two of the most famous names in ballroom dance — Bill and Bobbie Irvine. Known for their perfect technique, amazing chemistry, and elegant style, the Irvines made a lasting impact on competitive ballroom dancing. This video shows their… https://www.david-duval.com/any-human-studies-of-calcium-akg-and-increased-lifespan/ https://www.david-duval.com/any-human-studies-of-calcium-akg-and-increased-lifespan/ Wed, 28 May 2025 18:14:27 +0000 I recently have been interested in longevity which I believe is a field that will be massively growing in the coming years, and one supplement that has been getting a lot of attention lately is Calcium AKG, because is easier to get… https://www.david-duval.com/longevity-studies-whats-hot-right-now/ https://www.david-duval.com/longevity-studies-whats-hot-right-now/ Fri, 23 May 2025 21:06:25 +0000 Longevity seems to be a really fast developing field and of course, at my age, I want to do the best I can to live a long and healthy life. Some of the below areas of study are still somewhat in clinical… https://www.david-duval.com/longevity-escape-velocity-roadmap-2025/ https://www.david-duval.com/longevity-escape-velocity-roadmap-2025/ Wed, 21 May 2025 23:54:30 +0000 The Road to Longevity Escape Velocity: A Strategic Framework for Staying Alive Long Enough to Reap the Benefits of Radical Life Extension As advancements in biotechnology, artificial intelligence, and computing accelerate, a growing number of scientists and technologists believe humanity is… https://www.david-duval.com/tips-for-reducing-usage-in-cursor-and-avoiding-repetitive-loops/ https://www.david-duval.com/tips-for-reducing-usage-in-cursor-and-avoiding-repetitive-loops/ Wed, 21 May 2025 22:10:04 +0000 How to Avoid Wasting Credits on Cursor AI When You’re Stuck Someone recently asked me how to avoid getting into those repetitive loops where you just keep hitting “Run” in Cursor AI without making any real progress, and worse, you’re burning through… https://www.david-duval.com/how-many-laundering-works-with-fentanyl/ https://www.david-duval.com/how-many-laundering-works-with-fentanyl/ Wed, 21 May 2025 01:45:28 +0000 Money laundering is complicated, which is one of the reasons it thrives. Let’s look at fentanyl, Mexico, and China… There are many Chinese nationals who want to move money out of China. But there’s a $50,000 withdrawal limit per year and you… https://www.david-duval.com/the-universe-is-not-shaped-like-a-ball/ https://www.david-duval.com/the-universe-is-not-shaped-like-a-ball/ Sat, 17 May 2025 21:04:54 +0000 Often when people think of something like the Big Bang, which is still highly speculative, they imagine the known universe starting as a single point or a small ball that blew up and began expanding. But what is actually ball-shaped is what… https://www.david-duval.com/comparison-healthcare-in-the-united-states-versus-canada/ https://www.david-duval.com/comparison-healthcare-in-the-united-states-versus-canada/ Fri, 16 May 2025 13:29:22 +0000 Something is not adding up… America vs. Canada: What Are We Paying For? In 2024, the U.S. spent $14,570 per person on healthcare—nearly 1.6x more than Canada, which spent about $9,054 CAD per person. But what do we get?• Life Expectancy: U.S.:… https://www.david-duval.com/google-losing-search-share/ https://www.david-duval.com/google-losing-search-share/ Fri, 09 May 2025 16:03:11 +0000 Is Google finally going to start to decline? They have dominated search, and along with it, paid ad advertising, for more than a decade. Apple published to report for April 2025 that users of Safari used google search less than a year… https://www.david-duval.com/how-to-rehome-a-cat-a-complete-guide-for-responsible-pet-owners/ https://www.david-duval.com/how-to-rehome-a-cat-a-complete-guide-for-responsible-pet-owners/ Sat, 26 Apr 2025 10:17:11 +0000 Rehoming a cat can be one of the toughest decisions any pet owner will face. Whether due to unexpected life changes, financial difficulties, or health concerns, the need to find a new home for your feline friend is often a situation that… https://www.david-duval.com/nocturia-in-men-why-you-wake-up-to-pee-at-night-and-how-melatonin-and-magnesium-might-help/ https://www.david-duval.com/nocturia-in-men-why-you-wake-up-to-pee-at-night-and-how-melatonin-and-magnesium-might-help/ Sat, 26 Apr 2025 10:11:36 +0000 Waking up to use the bathroom occasionally isn’t a big deal, but it can become quite frustrating when it happens every night. I had been having some trouble waking up in the middle of the night with the urge to pee, so… https://www.david-duval.com/thai-learning-app-thai-letters-and-words/ https://www.david-duval.com/thai-learning-app-thai-letters-and-words/ Fri, 11 Apr 2025 17:03:11 +0000 I built a new … Thai language learning app … mainly for myself, but I thought I would share it with the rest of the world. There are two main parts, studying letters and studying words. They’re all inside the same menu,… https://www.david-duval.com/travel-hacks-to-save-money-as-a-digital-nomad/ https://www.david-duval.com/travel-hacks-to-save-money-as-a-digital-nomad/ Tue, 08 Apr 2025 00:39:43 +0000 Life on the road can get expensive, but with a few clever strategies, you can stretch your budget, enjoy better experiences, and travel longer. Here are some tried-and-true hacks to help you save money while traveling the world as a digital nomad:… https://www.david-duval.com/are-you-superstitious-about-numbers/ https://www.david-duval.com/are-you-superstitious-about-numbers/ Sun, 06 Apr 2025 21:26:51 +0000 When you’re presented with a set of numbers or you have to choose one, are there certain numbers you avoid? For me, I tend to do the opposite. I often lean toward the number that makes me feel a little uneasy —…