This is a open source Telegram bot that provides chess puzzles.

Available here: https://t.me/ChessQuizBot

Here's how /random command looks like in my private chat:

Here's how /puzzle command looks like in a group chat. It produces a poll so that many people can answer:

Current verison has these main commands:

• /random to get a random puzzle (no rating)
• /quiz to get the next puzzle (affects rating)
• /top to see current top-rated players
• /puzzle to send puzzles to channels and group chats

There's also /help and /feedback commands and a few admin tools and stats. All custom commands are stored in quizbot/commands.

This is built on top of Longman's great PHP telegram bot framework: https://github.com/php-telegram-bot/core
I made a custom version of tikul's fen-to-png python script to generate images: https://github.com/tikul/fen-to-png

Special thanks to @mmlart, @igniperch, @MESSSERR, @Kon85 and @BomberHarris_XRP for helping input the chess problems.