The rules:

^* Solo21 is a Solitaire-type game, inspired by Blackjack.

^* The game is played with a 54-cards deck (including 2 wild cards).

^* The goal of each hand is to get a card total higher than the opponent card total without exceeding 21.

^* The numerical values of the cards are as follow:

0	2	- 10	11	12	13	14

^* Each hand begins by revealing the first card and the first opponent card;

^* For each subsequent hand card a choice has to be made, either to reveal the card or skip it.

^* Afterwards, the corresponding opponent card is revealed;

^* The last opponent card is not revealed if the opponent card total is 17 or higher.

* The hand is won if: the card total hits 21; the card total is higher than the opponent card total; the opponent card total is higher than 21.

* The hand is lost if: the opponent card total hits 21; the card total is lower than or equal to the opponent card total; the card total is higher than 21.

^* When a hand is won, all revealed (face-up) cards are taken as Points; the rest are discarded.

^* If a hand is won with a card total of 21, all 6 cards in play are taken as Points.

^* Game ends when the whole deck is exhausted (after 9 hands).

Some thoughts:

^* I came up with this simple card game around September / October 2025. I decided I wanted to share it on this website, but I thought just writing down the rules wouldn't be enough.

^* So I made an interactive digital version with JavaScript. This way you can try it without having to grab a deck of cards and fully understand how it works.

^* Coding it has been a fun experiment!

^* Back in October I had started making it on Scratch, but I quickly lost motivation to continue when I encountered some issues I couldn't figure out how to fix.

^* Some weeks later I decided to attempt coding it in JavaScript, did most of it in early November, then took a break.

^* The break lasted until early January, when I finally implemented the code that checks if you've won or lost.

>>> EDIT (Jul 13th 2026)

^* I have made some major modifications to the game's UI, as I was never fully happy with the way the original version displayed its information.

^* One big change I've made is replacing the card graphics with a custom version of the classic Windows Solitaire cards. All sprites have been slightly modified to have better aligned suit symbols and corner indices, plus I've drawn a custom back sprite.

^* The old card graphics were mostly from Bicycle Solitaire/Poker (Windows), while the Joker card was a custom sprite based on Ginga (NEC PC-8801), and the Ace of Spades was based on a real card I have.

EDIT END <<<

^* I think my high score is 37 Pts. I wonder what the highest possible score is... can all 54 cards be obtained as Points?

^* Expect more card-related blog entries at a later date.