unsigned tb_probe_root(
    uint64_t white,    uint64_t black,
    uint64_t kings,    uint64_t queens,
    uint64_t rooks,    uint64_t bishops,
    uint64_t knights,  uint64_t pawns,
    unsigned rule50,   unsigned ep,
    bool     turn,     unsigned *results);

Calling Conditions:

• Can only be called when neither player has any Castling Rights remaining
• Can only be called when the # of pieces is less than or equal to TB_LARGEST
• Can only be called by one thread at a time

Non-trivial Parameters:

• rule50 is the fifty-move counter
• ep is the Enpassant Square, as described in a typical FEN. If there is no square, the value must be 0
• turn must either be PYRRHIC_WHITE, or PYRRHIC_BLACK. Those constants may differ from your own engine
• results may be NULL, or a pointer to some unsigned results[TB_MAX_MOVES]

Return Value:

• Failed probes will return TB_RESULT_FAILED
• Probes in already finished games will return TB_RESULT_STALEMATE or TB_RESULT_CHECKMATE
• Successful probes will return an unsigned TB_RESULT

Additional Notes:

• The move encoded in the return value is guaranteed to preserve the optimal WDL result
• Moves in the results array are not guaranteed to preserve the optimal WDL result
• Moves in the results array can have wrong WDL results when repetitions have occurred
• This function should not be used for "Filtering" the Root Moves of an engine's search