SPOC: The Chess Master (Selective Pruning Optimization Chess) is a 1983 puzzle and strategy game published by Cypress Software for DOS. Recognized at the time for its strong playโestimated at a USCF 1700 ratingโit offers a top-down view of the board and a highly capable computer opponent for the era.
How to play
You can play as white or black against the computer across nine skill levels, or face a second player. The difficulty settings determine how much time the CPU is allowed to calculate its next move. Level 6 acts as a tournament mode, giving both players two hours to complete a 40-move sequence.
The game is controlled using the keyboard, matching its original MS-DOS mapping. You can press Right Alt + Enter at any time to toggle fullscreen mode.
Tips
- Use the tools: The game includes built-in functions to undo previous moves or force the computer to make its move immediately if it is taking too long to calculate.
- Plan your time: On higher difficulties, the computer becomes a much stronger opponent but will take significantly longer to think. Adjust the level based on how long you want the match to last.





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