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    "description": "**Author**: David W. Aha    \r\n**Source**: [UCI](https:\/\/archive.ics.uci.edu\/ml\/datasets\/Tic-Tac-Toe+Endgame) - 1991   \r\n**Please cite**: [UCI](http:\/\/archive.ics.uci.edu\/ml\/citation_policy.html)\r\n\r\n**Tic-Tac-Toe Endgame database**  \r\nThis database encodes the complete set of possible board configurations at the end of tic-tac-toe games, where \"x\" is assumed to have played first.  The target concept is \"win for x\" (i.e., true when \"x\" has one of 8 possible ways to create a \"three-in-a-row\").  \r\n\r\n### Attribute Information  \r\n\r\n     (x=player x has taken, o=player o has taken, b=blank)\r\n     1. top-left-square: {x,o,b}\r\n     2. top-middle-square: {x,o,b}\r\n     3. top-right-square: {x,o,b}\r\n     4. middle-left-square: {x,o,b}\r\n     5. middle-middle-square: {x,o,b}\r\n     6. middle-right-square: {x,o,b}\r\n     7. bottom-left-square: {x,o,b}\r\n     8. bottom-middle-square: {x,o,b}\r\n     9. bottom-right-square: {x,o,b}\r\n    10. Class: {positive,negative}",
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