Simplified summary of the Texans wildcard hopes:
If the Texans finish 10-6 (winning final 3), the Texans are in the playoffs unless San Diego goes 3-0 against (Denver, SF, and KC) and both Pittsburgh and Cincinnati win their week 15 and 16 games, before facing off head to head in week 17.
If the Texans finish 9-7, they need the following:
(assuming Cincy wins the AFC North)
2 of the three 8-5 teams need to lose 2 of their final 3 games (or all three)
Baltimore (Jack, @Hou, Clev)
Pittsburgh (@Atl, KC, Cincy)
San Diego (Den, @SF, @KC)
and
all 4 of these 7-6 teams need to lose at least 1 of their final 3:
KC (Oak, @Pitt, SD)
Buffalo (GB, @Oak,@ NE)
Miami (@NE, Minn, NYJ)
Cleveland (Cincy, @Car,@ Balt)
Because there will be multiple 9-7 teams (almost assuredly) and the Texans will finish with 8 conference wins if they finish 9-7, the Texans win almost any tiebreaker at 9-7... So, what they would need is no more than one non-division winner to finish with less than 7 losses and they are very likely to be in.