Junction Nine vs Rivoko

Behind Junction Nine is a published mathematical result: in a 3×3 grid where any rectangle can be spun 180 degrees, every arrangement can be returned to order - and never in more than nine spins. We designed the puzzles and independently calculated the fewest spins each one takes. See if you can match the minimum. HOW IT WORKS Spin any rectangular section of the grid 180°. Remember - squares count as rectangles. A move can shift several pieces at once, so fixing one connection can disrupt another. Rotate tiles until every connection lines up. Then keep going: can you match the fewest possible spins? Every puzzle has a proven minimum. ORIGIN — FREE Start with Origin, a collection that introduces the mechanic and builds from simple puzzles to genuinely tricky ones. TRANSFER Unlock a second collection with a new set of puzzles to master. DESIGNED FOR THINKING - No ads - No timers or penalties - Optional haptic feedback and sound - Light and dark themes - More puzzle packs planned Quick to learn. Surprisingly hard to perfect.

One stone. Four directions. A board that changes with every move. Rivoko is a turn-based strategy game played on a 5×5 board. Place a black or white stone and flip the first existing stone in each horizontal and vertical direction—even your own. Make a line of four or more to win, but look closely: your move can give your opponent the winning line. CLIMB THROUGH FIVE RIVALS Meet Nio, Kira, Bram, Vey and Nox. Earn unassisted wins to unlock the next rival, then win with both colors to master each challenge. PLAY TOGETHER Challenge a friend in local two-player mode on one iPhone. Take turns, switch colors for a rematch and review the game move by move. LEARN BY PLAYING Four interactive lessons introduce the rules. Preview the stones that will flip before you commit. Use hints and undo in solo training, then put what you learned into practice. PICK UP WHERE YOU LEFT OFF Matches, settings and achievements are saved on your device. Revisit completed games with a move-by-move replay. MADE FOR QUIET FOCUS Enjoy a tactile board, animated 3D rivals, light and dark themes, and English or German. Rivoko works entirely offline, with no accounts, ads or in-app purchases.