Play
Puzzles and games about bits: a daily register puzzle, hex picross, and a logic-gate lab.
Bit Flip — daily register puzzleTurn the start register into the target with the fewest shifts, rotates, flips and inversions. New puzzle every day, share your result1001 1000 → 0110 1111 in 5 moves (par 5)Bit Picross — hex nonogramPaint the hidden pixel picture from the clues; every row you finish lights up as a byte. Daily 8×8 and 16×16, plus a hex-decoding racerow 3 → 0x7E · col clues 1 1 · solved!Gate Lab — build logic circuitsWire AND, OR, XOR, NOT and NAND gates to match a truth table: from an inverter to a full adder. Live simulation, 14 levelsA ⊕ B from four NANDs · full adder in 5 gates