{"package_name":"io.github.patrickric.connectfourstudio","name":"ConnectFour Studio","summary":"Connect Four with 15 levels, 20 boards, match mode and perfect analysis","category":"Board Game","icon_url":"/api/icon/io.github.patrickric.connectfourstudio","latest_version_code":2,"latest_version_name":"1.0.1","apk_url":"/api/apk/io.github.patrickric.connectfourstudio","apk_size":6429519,"apk_sha256":"988b136573a7d0376ed79d379f962b1c0971a5fc1f81023c3a1f5d7895057a95","source_kind":"fdroid-repo","repo_slug":"fdroid-main","last_updated":1792119620,"release_timestamp":1792083575,"description":"<p>ConnectFour Studio is a free, offline Connect Four program: play against the computer, analyse positions and run engine-versus-engine matches. It is the Android version of the desktop program of the same name, with the same engine, levels, help and texts.</p>\n\n<p><b>Engine</b></p>\n<ul>\n<li>Perfect play: a Kotlin port of the BitBully solver by Markus Thill (bitboards, MTD(f), transposition table) with the 12-ply opening book with distances – identical results to the original C++ engine</li>\n<li>15 levels: 0 Loser (joke level), 1 Random … 14 Perfect, defined by (p, s, w): share of perfect moves, loss guard and win guard</li>\n<li>Two custom levels User (1) and User (2) with your own (p, s, w)</li>\n</ul>\n\n<p><b>Analysis</b></p>\n<ul>\n<li>Evaluation row under the board: win / draw / loss for every column and the number of stones until the end</li>\n<li>Permanent analysis after every move, one-off evaluation of all moves</li>\n<li>Info box with depth, value, nodes, time, speed and source (book or computed)</li>\n</ul>\n\n<p><b>Game modes</b></p>\n<ul>\n<li>Human vs. computer (the computer can also open), two players, computer plays out the position</li>\n<li>Computer-computer match with up to 10,000 games, colour swap, three speeds, Elo difference and copyable result</li>\n<li>Session score human vs. computer per level with Elo estimate</li>\n<li>Random start positions with 1–9 stones and a chosen result</li>\n</ul>\n\n<p><b>More</b></p>\n<ul>\n<li>20 boards with matching stones, ghost stone, drop animation, last move and winning line marked</li>\n<li>Load and save positions as .4gp files (compatible with the desktop version), quick save</li>\n<li>Detailed help with search and zoom, user interface in English, German, French, Spanish, Dutch and Italian</li>\n<li>Portrait and landscape, phones and tablets, keyboard shortcuts with a hardware keyboard</li>\n<li>No permissions, no internet access, no ads, no tracking</li>\n</ul>\n\n<p>License: GNU AGPL v3. Engine: BitBully by Markus Thill (AGPL v","categories":["Board Game","Strategy Game"]}