

I wanted a Cribbage bot I could actually learn from, so I built one that explains its moves
Hey everyone. I built this because I wanted a better way to practice Cribbage on my own. Strong bots could beat me but didn't teach me much, while easy bots often just made random, silly moves. I wanted a practice partner I could grow with.
The feature I care about most is Hint → Why. Hint shows a move; Why explains the Cribbage idea, dangerous replies, and the cost of alternatives for both discarding and pegging. It comes from the game analysis itself, not chatbot text.
After a game, Game Review revisits every decision: discard and pegging mistakes, points lost, board position, and the exact moment it happened, rather than just one overall grade.
I also built six AI levels as a progression, not one bot with a different error rate. Lower levels make believable beginner mistakes; each step adds stronger discard, pegging, inference, and board-position skills. Ultra uses a match-equity model built from one billion self-play deals.
The AI never sees your hand or the deck. It's free in the browser on desktop and phone, with no account or download. Play is fast and silent, with automatic scoring or Counting Practice.
Try it here: https://theworldatplay.com/en/cribbage
I'd love feedback on two things: do Hint → Why and Game Review teach you something useful, and do the AI levels feel natural? Try a level that fits, or work your way up and take a shot at Ultra. If the bot makes a weak or strange play, send me the hand and board position.
I'm keeping a list for future versions, too. If something would make this a better practice partner, tell me. I'll use the best suggestions to shape what I build next.
I built a free Shogi puzzle site with a YaneuraOu opponent — feedback welcome
Hi! I built a free browser-based Shogi page and would love feedback from experienced players.
It has a daily tsume puzzle, a puzzle journey with progressively harder positions, and full games against YaneuraOu 7.62 + Suisho 5 NNUE. The engine runs locally in the browser.
The puzzles support drops, promotions, hints, streaks, and locally saved progress. No account or ads are required.
I’m especially interested in puzzle correctness — including alternate solutions — as well as board/hand orientation and AI move quality.
Puzzles:
https://theworldatplay.com/puzzles/shogi
Play against the AI:
https://theworldatplay.com/shogi
Critical feedback is very welcome!
I built an interactive Xiangqi puzzle page with an AI opponent — looking for feedback
Hi everyone! I’ve been working on an interactive Xiangqi puzzle page and would love for experienced players here to try it.
https://theworldatplay.com/puzzles/xiangqi
My goal is to make it easy to solve Xiangqi positions directly on the board. I’d especially appreciate feedback on:
- The quality and difficulty of the puzzles
- Whether the controls and notation are clear
- Whether any positions or solutions are incorrect
The site also includes an AI opponent for full games. I’d be very interested in your opinion of its strength and move quality as well.
I’m the developer, so honest and critical feedback is very welcome:
I’m building a free browser collection of 52 board and card games — what should I add next?
Game Title: The World at Play
Platform: Web browser
Free to Play Status: Completely free — no account or download required
Playable Link: https://theworldatplay.com/en
Description: I’m a solo developer building a collection of board and card games that you can play directly in the browser.
There are currently 52 games, each with computer opponents, adjustable difficulty, hints, and rules.
I’d genuinely love to hear what games you think I should add next, or what features would make the site more useful and enjoyable for you.
Thanks for taking a look!
Involvement: Solo developer
Hearts — play the classic card game against three local AIs, no signup
theworldatplay.comI made a site with free AI opponents for Shobu, YINSH, DVONN, TZAAR, Amazons and LOA
I kept wanting to play these and having nothing to play them against, so I ended up writing the engines myself. It's free, no account, and the AI runs in your browser — nothing gets sent to a server.
Shobu — https://theworldatplay.com/en/shobu
YINSH — https://theworldatplay.com/en/yinsh
DVONN — https://theworldatplay.com/en/dvonn
TZAAR — https://theworldatplay.com/en/tzaar
Amazons — https://theworldatplay.com/en/amazons
Lines of Action — https://theworldatplay.com/en/lines-of-action
There are about 38 games up in total, but these six are the ones I'd most like people to break. Expert is the level worth trying. If it plays something stupid, tell me — I'd like to know which of the six is weakest. My money's on DVONN.
And if there's something you want to play that isn't up there, name it and I'll add it.