Introducing ... Blitzcore!

My family has become quite addicted to an excellent little card game called [Dutch Blitz](https://en.wikipedia.org/wiki/Dutch_Blitz). It's easy to learn, compact, reasonably quick to play (although the exact length of an entire game can vary *wildly*...) and it's lots of fun. The only downside is the scoring system, which involves pen-and-paper and certain amount of maths, making the scorekeeper role unappealing to younger players. To this end, I'm pleased to release [Blitzcore](https://blitzcore.themillhousegroup.com) ("Blitz-Score") to the world, allowing your phone to do the maths for you and present a clear picture of the score ^[1](#foot-1).

Paintakingly designed to fit onto exactly one phone-sized browser page like [all good mobile-first webapps](https://blog.themillhousegroup.com/2023/08/searching-for-next-spa.html), it uses bright colours that match the game, big easy-to-hit buttons, and just-in-time calculation to ensure the score is always accurate, no matter what you just edited.

Your player name and colour preferences are stored in LocalStorage to make it even quicker to get going next time.

This is my first "big" (not really) webapp in [Svelte 5](https://svelte.dev/) and [SvelteKit](https://svelte.dev/docs/kit/introduction) and it's been a pretty delightful experience. I `push` to my Github private repo and Netlify (free tier) picks it up and publishes to the world in about 45 seconds. The page load time is absolutely stupendous - Svelte/SvelteKit/Vite is absolutely killing it here. The only trouble I've ever had has been occasionally Svelte *not* reacting to a change when expected, which so-far has been 100% due to my failure to wrap derived values in [the `$derived()` rune](https://svelte.dev/docs/svelte/$derived). It can be quite a pain to track down these things, which seemed to mostly be around manipulating array entries (using `slice` and friends), but I got there in the end. Enjoy! --- ¹ To be clear, this is not a version of the game itself - the creators have actually [attempted to do this for mobile devices](https://dutchblitz.com/), which I have never tried ... [⤴︎](#foot-1-src)