IGO Academy vs Undermine

IGO Academy is a complete way to learn and play Go — the ancient board game also known as Baduk (바둑) and Weiqi (围棋). Whether you have never placed a stone or you are sharpening your reading, everything is here, offline, with no ads and no accounts required. LEARN FROM ZERO • Eight interactive lessons take you from the very first stone to scoring a finished game: liberties and capture, atari, saving stones, illegal moves, the ko rule, life and two eyes, and territory. • Every lesson step is hands-on — you play the move yourself. 500+ PROBLEMS TO SHARPEN YOUR READING • More than 100 problems at each of five difficulty tiers: Novice, Easy, Normal, Hard, and Expert. • Capture, atari, escape, connection, and life-and-death (tsumego) — including snapbacks and vital-point shapes. • Your progress is tracked so you always know what is left. FIVE LEVELS OF AI • Play full games against opponents from gentle beginner to a Monte-Carlo Tree Search engine that actually reads ahead. • Choose your color, add handicap stones, and play on 5×5, 7×7, 9×9, 13×13, 19×19, or 21×21 boards. PLAY PEOPLE • Game Center for online matches. • Local-network play over your Wi-Fi or wired network using Bonjour — no internet or account needed. BUILT RIGHT • Full rules: captures, suicide, simple ko and positional superko, two-pass scoring (Chinese area or Japanese territory) with komi, and unlimited undo. • Export any game as an SGF file to study or share. • Clean, native, and fast. IGO Academy is free. Sit down at the board and play.

Undermine is a tense two-player board game for one iPhone or iPad lying on the table between you. Take turns placing chips on your own entry row or moving any chip on the board — yours or your opponent's — one step in any direction. Be the first to line up four of your colour, across, down or diagonally. But 18 mines are hidden under the 6 × 6 board, three in every row, and nobody knows where. Whenever a chip steps on a mine, it flips to the other colour. Push your opponent's chip onto a mine and it becomes yours — or complete their line by accident and hand them the win. • Two players face to face on one device, or VS Bot at Easy, Normal and Hard • Tabletop layout: each player reads their own end of the screen • Learn in a minute with illustrated How to Play cards and in-game tips • Undo a move by watching a short ad • Your game is saved automatically — continue any time • View the mines when the game ends and see where it turned • Free with ads; a one-time Remove Ads purchase turns them off • English, Traditional Chinese and Korean