Pulsar Chess Engine

Multilevel Chess Program AI

USD 0.99

The Pulsar Chess Engine plays chess and six variants all with adjustable levels : Chess960, Crazyhouse, Losers, Atomic, Three Checks and Giveaway. Games played that have a result or resignation are logged and can be reviewed. There are additional game collections when users open their log file of classic and modern master games including Fischer, Carlsen and Morphy collections. If the game is a chess game or Chess960, Crafty engine analysis is available. The App's max strength is around Expert. Pulsar values mobility and active positions. In app there is an article with more on its playing style and how to train against it. With the variants, each has its own style. Chess960, Three Checks and Crazyhouse are the more chess like variants and adoptable to learn to play for anyone with interest. The rules of all games are in app. Pulsar has levels of play from beginner too advanced. Games with a time control are the hardest though Pulsar doesn't call the player's time. The time is more to handicap Pulsar's strength, but users will have a clock and can see if it's gone negative if they want to play the time control. The game button - configure game menu item, lets the user control the variant and difficulty. It defaults to Chess at Easy(lowest level) but remembers the current settings when the App restarts. There are choices of pieces and board color schemes. The Pulsar program was originally developed by me for computers starting in 1998 and came to mobile for the first time in 2014. Pulsar's board is accessible to the blind using Voice Over, a screen reader. Tap on a square and it will say whats on it and double tap to move or choose from three move methods. A screen reader can normally read anything with text like a button, but a board is a collection of images. To make it accessible, text must be returned to Voice Over when a tap is in the area of a square. Pulsar began as a chess program and later learned variants. It ran extensively on two servers for many years both at chess and variants. The ratings on the board reflect strength I saw in rated play on handicapped bots. They are not 100% exact but generalizations I made from the various bots I ran at different settings. If in the new game selector, Play vs. Computer is unchecked the user can move for both sides. This is to allow two people at same location to use the App as a board for a game and have the app enforce move legality and results for whatever variant is selected.

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The developer, Michael Adams, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    • Provider
      • Michael Adams
    • Size
      • 11.5 MB
    • Category
      • Board
    • Compatibility
      Requires iOS 9.0 or later.
      • iPhone
        Requires iOS 9.0 or later.
        • ⁨iPhone 5S⁩
        • ⁨iPhone 6⁩
        • ⁨iPhone 6 Plus⁩
        • ⁨iPhone 6S⁩
        • ⁨iPhone 6S Plus⁩
        • ⁨iPhone SE (1st generation)⁩
        • ⁨iPhone 7⁩
        • ⁨iPhone 7 Plus⁩
        • ⁨iPhone 8⁩
        • ⁨iPhone 8 Plus⁩
        • ⁨iPhone X⁩
        • ⁨iPhone XS⁩
        • ⁨iPhone XS Max⁩
        • ⁨iPhone XR⁩
        • ⁨iPhone 11⁩
        • ⁨iPhone 11 Pro⁩
        • ⁨iPhone 11 Pro Max⁩
        • ⁨iPhone SE (2nd generation)⁩
        • ⁨iPhone 12 mini⁩
        • ⁨iPhone 12⁩
        • ⁨iPhone 12 Pro⁩
        • ⁨iPhone 12 Pro Max⁩
        • ⁨iPhone 13 Pro⁩
        • ⁨iPhone 13 Pro Max⁩
        • ⁨iPhone 13 mini⁩
        • ⁨iPhone 13⁩
        • ⁨iPhone SE (3rd generation)⁩
        • ⁨iPhone 14⁩
        • ⁨iPhone 14 Plus⁩
        • ⁨iPhone 14 Pro⁩
        • ⁨iPhone 14 Pro Max⁩
        • ⁨iPhone 15⁩
        • ⁨iPhone 15 Plus⁩
        • ⁨iPhone 15 Pro⁩
        • ⁨iPhone 15 Pro Max⁩
        • ⁨iPhone 16⁩
        • ⁨iPhone 16 Plus⁩
        • ⁨iPhone 16 Pro⁩
        • ⁨iPhone 16 Pro Max⁩
        • ⁨iPhone 16e⁩
        • ⁨iPhone 17 Pro⁩
        • ⁨iPhone 17 Pro Max⁩
        • ⁨iPhone 17⁩
        • ⁨iPhone Air⁩
      • iPad
        Requires iPadOS 9.0 or later.
        • ⁨iPad Air⁩
        • ⁨iPad Air Wi‑Fi + Cellular⁩
        • ⁨iPad mini 2⁩
        • ⁨iPad mini 2 Wi‑Fi + Cellular⁩
        • ⁨iPad Air 2⁩
        • ⁨iPad Air 2 Wi‑Fi + Cellular⁩
        • ⁨iPad mini 3⁩
        • ⁨iPad mini 3 Wi‑Fi + Cellular⁩
        • ⁨iPad mini 4⁩
        • ⁨iPad mini 4 Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (12.9‑inch)⁩
        • ⁨iPad Pro (12.9‑inch) Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (9.7‑inch)⁩
        • ⁨iPad Pro (9.7‑inch) Wi‑Fi + Cellular⁩
        • ⁨iPad (5th generation)⁩
        • ⁨iPad (5th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (12.9‑inch) (2nd generation)⁩
        • ⁨iPad Pro (12.9‑inch) (2nd generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (10.5‑inch)⁩
        • ⁨iPad Pro (10.5‑inch) Wi‑Fi + Cellular⁩
        • ⁨iPad (6th generation)⁩
        • ⁨iPad (6th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (11‑inch)⁩
        • ⁨iPad Pro (11‑inch) Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (12.9‑inch) (3rd generation)⁩
        • ⁨iPad Pro (12.9‑inch) (3rd generation) Wi‑Fi + Cellular⁩
        • ⁨iPad mini (5th generation)⁩
        • ⁨iPad mini (5th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Air (3rd generation)⁩
        • ⁨iPad Air (3rd generation) Wi‑Fi + Cellular⁩
        • ⁨iPad (7th generation)⁩
        • ⁨iPad (7th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (11‑inch) (2nd generation)⁩
        • ⁨iPad Pro (11‑inch) (2nd generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (12.9‑inch) (4th generation)⁩
        • ⁨iPad Pro (12.9‑inch) (4th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Air (4th generation)⁩
        • ⁨iPad Air (4th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad (8th generation)⁩
        • ⁨iPad (8th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (11-inch) (3rd generation)⁩
        • ⁨iPad Pro (11-inch) (3rd generation) Wi-Fi + Cellular⁩
        • ⁨iPad Pro (12.9-inch) (5th generation)⁩
        • ⁨iPad Pro (12.9-inch) (5th generation) Wi-Fi + Cellular⁩
        • ⁨iPad mini (6th generation)⁩
        • ⁨iPad mini (6th generation) Wi-Fi + Cellular⁩
        • ⁨iPad (9th generation)⁩
        • ⁨iPad (9th generation) Wi-Fi + Cellular⁩
        • ⁨iPad Air (5th generation)⁩
        • ⁨iPad Air (5th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad (10th generation)⁩
        • ⁨iPad (10th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (11‑inch) (4th generation)⁩
        • ⁨iPad Pro (11‑inch) (4th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Pro (12.9‑inch) (6th generation)⁩
        • ⁨iPad Pro (12.9‑inch) (6th generation) Wi‑Fi + Cellular⁩
        • ⁨iPad Air 11-inch (M2)⁩
        • ⁨iPad Air 11-inch (M2) Wi-Fi + Cellular⁩
        • ⁨iPad Air 13-inch (M2)⁩
        • ⁨iPad Air 13-inch (M2) Wi-Fi + Cellular⁩
        • ⁨iPad Pro 11-inch (M4)⁩
        • ⁨iPad Pro 11-inch (M4) Wi-Fi + Cellular⁩
        • ⁨iPad Pro 13-inch (M4)⁩
        • ⁨iPad Pro 13-inch (M4) Wi-Fi + Cellular⁩
        • ⁨iPad mini (A17 Pro)⁩
        • ⁨iPad mini (A17 Pro) Wi-Fi + Cellular⁩
        • ⁨iPad (A16)⁩
        • ⁨iPad (A16) Wi-Fi+ Cellular⁩
        • ⁨iPad Air 11-inch (M3)⁩
        • ⁨iPad Air 11-inch (M3) Wi-Fi + Cellular⁩
        • ⁨iPad Air 13-inch (M3)⁩
        • ⁨iPad Air 13-inch (M3) Wi-Fi + Cellular⁩
        • ⁨iPad Pro 11-inch (M5)⁩
        • ⁨iPad Pro 11-inch (M5) Wi-Fi + Cellular⁩
        • ⁨iPad Pro 13-inch (M5)⁩
        • ⁨iPad Pro 13-inch (M5) Wi-Fi + Cellular⁩
      • iPod touch
        Requires iOS 9.0 or later.
        • ⁨iPod touch (6th generation)⁩
        • ⁨iPod touch (7th generation)⁩
      • Mac
        Requires macOS 10.15 or later.
      • Apple Vision
        Requires visionOS 1.0 or later.
    • Languages
      English and 4 more
      • English, French, German, Italian, Spanish
    • Age Rating
      4+
    • Copyright
      • © 2014-2025 Michael Adams