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 *   the most basic one is simply the remaining material for each side.  If    *
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 *   the most basic one is simply the remaining material for each side.  If    *
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 *   either side has pawns, it's not a draw.  With no pawns, equal material is *
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 *   either side has pawns, it's not a draw.  With no pawns, equal material is *
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 *   a draw.  Otherwise, the superior side must have enough material to be     *
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 *   a draw.  Otherwise, the superior side must have enough material to be     *
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 *   able to force a mate.                                                     *
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 *   able to force a mate.                                                     *
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 *                                                                             *
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 *                                                                             *
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 *   Drawn() has 0 possible return values:                                     *
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 *   Drawn() has 3 possible return values:                                     *
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 *                                                                             *
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 *                                                                             *
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 *   0:  Game is not a draw by rule or drawish in nature.                      *
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 *   0:  Game is not a draw by rule or drawish in nature.                      *
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 *                                                                             *
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 *                                                                             *
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 *   1:  Game is a "technical draw" where material is even with no pawns and   *
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 *   1:  Game is a "technical draw" where material is even with no pawns and   *
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 *       the search is also returning draw scores as the best outcome.         *
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 *       the search is also returning draw scores as the best outcome.         *