One word a day · same word for everyone · resets 00:00 UTC
Daily Morse Challenge
Decode the Morse below — by eye or by ear — and guess the 5-letter word in 6 tries. Tiles work like the crossword-coloring game you already know: green is right, yellow is misplaced.
Next word in —
Your stats
How to play
- Read or listen. The five Morse groups above are today's word, one group per letter. Use the chart if you're new — that's not cheating, that's learning.
- Guess any 5-letter word. Green tile = right letter, right spot. Yellow = in the word, wrong spot. Gray = not in the word. Six tries.
- Train your ear. Try one honest audio-only attempt before reading the dots. That's real CW copy practice — the skill the Koch trainer builds.
- Keep the streak. Stats and streaks are stored on your device only. Same word for the whole planet, new word at 00:00 UTC.
How today's word is picked
The puzzle is generated in your browser from the date, so everyone opening the page on the same UTC day gets the same word without an account, a login or a server round trip. The word list holds 494 five-letter words and the day number steps through it with a stride that is coprime with the list length, which means every word comes up exactly once before any word repeats — about 16 months of puzzles.
Nothing you do here leaves your device. Your guesses, streak and stats live in your browser's local storage, so clearing site data resets them, and opening the puzzle on your phone and your laptop gives you two separate streaks.
Tips for decoding the puzzle
- Count elements, not dots. Each group is one letter of up to four signals. E and T are single signals, so a very short group narrows things down immediately.
- Watch the mirror pairs. A (.-) and N (-.), D and U, G and W are the same pattern reversed — the most common misread.
- Use the vowels. Nearly every five-letter word has at least one, and A, E, I and O are all short patterns, so they are the quickest to spot.
- Try audio first. Listening before looking is what builds real copying skill; the dots and dashes on screen are there as a safety net.
- Slow it down. Set the speed to 12 WPM while you learn, then move up. The timing calculator shows what changes as the speed rises.
Want the same practice without the guessing game? The Koch trainer drills letters at full speed, and random CW generates fresh groups to copy.