Grow from the top-left square by choosing colors until the entire board is yours. Try 1,000 boards.
12 LOGIC GAMES 18,000 puzzles and codes
NEW · 1,000 PUZZLES EACH
Color Flood
Fill the board, one color at a time.
Puzzle 1 / 1,0000 moves · 0 hints
2/36 squares filled
★23443311313412321132311423134443433
Choose a color below. Your area starts at the top-left star.
No timer or lives. Switching puzzles starts a fresh board. Progress lasts while this puzzle stays open; it is not added to your account score. Daily puzzles change at 00:00 UTC.
NEW · DEDUCTION
Codebreaker
Four digits. Eight guesses. Every clue counts.
Daily · Loading…0 / 8 guesses
Same code worldwide. A new one at 00:00 UTC.
? ? ? ?
Try any four different digits to get your first clue.
Level 16 × 6 · 14/36 filled
00:00
Keyboard: arrows to move · digits to fill · N for notes
Level 1Starter · 4 × 4
00:00
Each city keeps its own round. Switching cities does not pause the clock.
SEOUL STATION QUIZ
Seoul Stations
525 stations across 14 lines, including suburban branches. Type a name and press Enter.
0 / 525Stations in this challenge
20 minutes · 525 unique stations
20:00
Korean or English. Spaces, hyphens, capitalization and the station suffix do not matter. Same-name stations fill together. No penalty for wrong guesses. The clock keeps running when you switch games or close the app.
Seoul · Geographic map
Changing the map does not change your challenge.
North ↑
Drag to move. Pinch or use + / − to zoom. Keyboard: arrow keys, + / −, Home. The rivers, coast and regions are your clues.
A simplified branch-by-branch view. Swipe sideways on small screens. Line codes above a blank are interchange hints. Choose another line above to change these strips.
Northern · Yeoncheon–Guro
Incheon branch
Southern · Guro–Sinchang
Gwangmyeong branch
Seodongtan branch
Show 1 station list
1Northern · Yeoncheon–Guro
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1Incheon branch
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1Southern · Guro–Sinchang
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1Gwangmyeong branch
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1Seodongtan branch
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Lines 1–9, Suin–Bundang, Gyeongchun, Gyeongui–Jungang, AREX and Gimpo Goldline. Includes the Seoul Station, Imjingang and limited Gwangun Univ. branches. Other lines, ITX services, Dorasan and future extensions are excluded. Transfers count once; the two Sinchon stations and two Yangpyeong stations are separate places. The map uses real locations with simplified station-to-station connections, not every service stopping pattern. Optional strips show quiz order, not geography.
Web preview: refreshing this page resets the round. City quiz results do not change your logic puzzle score.
Sources and map notes
Station names and branches checked against Seoul Metro Cyber Station in Korean and English on 11 September 2026. Geography: OpenStreetMap contributors, adapted under ODbL 1.0, with 18 station coordinates from Wikidata (CC0). Transfer platforms are merged into one quiz point. Same-name Sinchon and Yangpyeong stations remain separate locations. Regional labels and river widths are illustrative; no official affiliation or journey-planning guarantee.
Both current and selected common older names are accepted, including Bulamsan / Danggogae and Jayang / Ttukseom Resort. The adapted data is available from the map credit. No live tiles or location tracking.
ORIGINAL ENGLISH MINIS
Mini Crossword
Longer answers. A little more to think about. Try Long Words, or warm up with Classic.
00:00
1 across · 8 lettersA place to find both Escape and Return
Type A–Z. Tap a selected cell again to switch direction. Arrow keys move; Enter goes to the next clue.
Across
Down
Web preview: progress stays while this page is open. Refreshing resets these minis. Checks and reveals are recorded separately. No lives or points to lose; these minis do not change your logic puzzle score.
LEVEL 1Easy
00:00
Solve to earn 3 pts
Tap to toggle X. Double-tap for a star. Drag from an empty cell to mark Xs, or from an X to erase.
Tap X again to clear it. Keyboard: Space marks X, Enter places.
0 / 5 stars placed
LOGIC & WORD GAMESStart anywhere. Play at your own pace.✳
How to play Color Flood
Choose a color to recolor the area connected to the top-left square.
Touching squares of that color join your area; diagonals do not connect.
Fill the whole board with a single color. There is no move limit.
A quick example
If your blue starting area touches three gold squares, choosing gold absorbs them and changes your whole area to gold.
Where to start
Look beyond the next patch: a small gain may open a bigger one. Hints maximize immediate growth, not the shortest possible solution. Undo, restart and UTC daily play are available. Progress stays in the current page session.
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