![]() ![]() This is somewhat akin to if you play with a physical board and a pieceset without spare queens.ġ.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.O-O a6 5.Ba4 Bg4 6.Nc3 30.Qxf3 Qxf3 31.a4 Bxf2 32.Nxf2 Qxf2+ 33.Kh3 Bf3 34.a5 Qg2+ 35.You can use QuickTime Player to record everything that happens on your computer’s screen or on a portion of your computer’s screen, along with your narration, if you’d like. You need to promote to a piece that has been captured and is currently off the board. The problem comes with pawn promotions: If you already have a queen on the board, you may not promote to a second queen. This allows the program to store a complete position using only 32 variables instead of 64. ![]() To conserve memory (the KIM-1 only had 1kB RAM) MicroChess does not store the board squares with the pieces Instead it stores the pieces, and which squares they are on. It also has one small quirk, which stems from the KIM-1 days. Draws by repetition or 50 moves are not covered, though. It has a simple opening book and understands castling, pawn promotion and en passant. Most of the basics of chess is covered here. Even on level 8 this program is easily beaten by any experienced player. Version 2.0 has 8 difficulty levels, although I am having a hard time telling those apart except for the amount of time they spend calculating. ![]() The game was also the brain behind a couple of dedicated chess computers, like Commodore Chessmate and Novag Chess Champion MK II. These versions included a graphical board on the screen and shows the moves on the side of the screen, making it a fully functional computer chess game. It was later improved and ported to a number of computers like TRS-80, Commodore PET, Sol 20, and Apple II. But it was chess on a home computer, which was a big deal in 1975. The first version was for the KIM-1, with zero graphical capabilities, and it played like a horses ass. MicroChess was the first commercially successful chess game for home computers. ![]()
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