Ninfea: Frog Logic Puzzle

Ninfea is a logic puzzle wearing a pond.

Place one frog in every row, in every column, and in every lily pond on the board. No two frogs may sit next to each other, and that includes the diagonals. There is exactly one arrangement that works, and you can always reason your way to it.

NEVER A GUESS
Every board is checked by a solver before you ever see it, and it has to pass twice: the solution must be the only one, and it must be reachable by reasoning alone. You will never be asked to pick one of two squares and hope. That is a property of how the puzzles are made, not a promise in a description.

A BOARD A DAY
One daily puzzle, the same one for every player, generated from the date itself. It needs no connection and no account, and it will still be there years from now.

LEVELS THAT KEEP GOING
A ladder that starts at a gentle 5x5 and climbs to 11x11 as you work through it, and it does not run out. Bigger boards, harder deductions, at a pace you set.

FOUR PACKS WHEN YOU WANT TO PICK
Easy, Medium, Hard and Impossible, from 6x6 to 10x10, all open from the start. No unlocking, no waiting.

ENDLESS
A ramp with no top. See how deep you get, and put your best depth on the leaderboard if you sign in to Play Games.

READABLE WITHOUT COLOUR
Every pond carries a heavy outline and a tone step as well as a hue, so the rules survive colour blindness and a greyscale screen.

Portrait, one hand, light and dark.

Ninfea is free. It is funded by a full screen ad between puzzles. There is nothing to buy, no subscription, no lives to wait for, and no account to create.