Bridges Puzzle: Island Logic

Each circle is an island, and its number says how many bridges it needs. Join them all with straight bridges — one or two between any two islands, never crossing — so you can walk from any island to any other. It is the logic puzzle also known as Hashi or Hashiwokakero, and every board here has exactly one answer you can reach without guessing.

HINTS THAT EXPLAIN
• A hint shows the next step and why it has to be there, in plain words: "This 4 can only reach two islands, and they can take 2 + 2 = 4 bridges at most. So build every one."
• When a step depends on a harder one, the hint shows that one first, then the step it unlocks
• If a bridge you built is not part of the answer, the hint points to it first
• The islands and bridges a hint is about light up on the board

A NEW BOARD EVERY DAY
• The Daily puzzle is the same board for everyone
• Easy on Monday and Tuesday, Medium mid-week, Hard at the weekend
• Solve it on consecutive days to grow your streak
• A home-screen widget shows today's board and your streak; one tap opens it

FIVE LEVELS, 2,500 PUZZLES
• Beginner, Easy, Medium, Hard and Expert, from 7×7 with 8 islands to 10×10 with 24
• Every board is graded by the reasoning it needs: counting the room around an island, spotting islands with no room to spare, never cutting a group off from the rest, and looking ahead
• 500 numbered puzzles in every level, played in order, with your progress kept

EASY TO PLAY
• Drag from an island towards a neighbour to build a bridge, or tap one island and then another
• Tap a bridge for a second one; a third tap takes it away
• Pick an island and faint lines show where its bridges can still go
• Islands turn green when they have their number and red if they have too many
• Undo as often as you like; a puzzle you leave is there when you come back

YOUR STATS
• Best and average time for every level, and how many you solved without a hint
• Light and dark themes, an optional timer, and keep-the-screen-on

PHONE, TABLET OR CHROMEBOOK
• On a big screen the board fills the height, with the hint and the buttons beside it
• With a keyboard, Ctrl+Z undoes and H asks for a hint

Works offline, with no account and no sign-in.