Kurtenbach: My 49ers-Seahawks (part 3) prediction — great start, tough finish

You can stare at the game tape until your retinas detach. You can break down the metrics until you’re hallucinating EPA.

None of that will tell you a single useful thing going into this NFC Divisional Round.

That is the specific, high-grade torment of this Saturday’s rubber match between the San Francisco 49ers and the Seattle Seahawks.

We are well past the point of X’s and O’s here, folks. We have waded deep into the murky waters of psychological warfare.

If you are a fan of logic — as in you enjoy things making sense — you love Seattle in this game. They are touchdown favorites for a reason. They are rested, having not played a snap of meaningful football since Week 18, and they possess tangible proof of concept, having strolled into Santa Clara just two weeks ago and beaten the 49ers into a pulp.

What more could you want?

It’s not like the Seahawks forgot how to play football during the bye; they just got healthier (even with Sam Darnold picking up a minor oblique injury).

Seattle might boast the best defense of this decade (and the last). What happens when that unit is feeling fresh? Logic shudders to think.

On the other side, you have the 49ers, a franchise currently clinging to a very different version of reality.

They look at that Week 18 drubbing and see fiction. They see a game that flips entirely if Christian McCaffrey doesn’t bobble a catch or if a defender actually falls on a Darnold fumble. They have convinced themselves they are a team of destiny — a place where logic has no jurisdiction over the final score.

And you know what? They just might be right.

With all that established, let’s try to predict the unpredictable:

McCaffrey hits 4 yards per carry

This would be a massive improvement over what McCaffrey has managed against this Seattle defense so far. In two games, he’s averaged a paltry 3 yards per carry, including a ghost act in Week 18 where he registered only eight touches.

The 49ers have no choice here. They simply cannot lose the time-of-possession battle for a second consecutive contest. The only way to beat the Seahawks is to have the ball more often than they do.

Any success the Niners find offensively will happen because the interior of their offensive line manages to get a big-time push.

It is a massive ask. But it is doable — particularly after San Francisco saw exactly how Seattle wants to defend the run just two weeks ago. A few wrinkles, a renewed commitment to violence up front, and suddenly the Niners have a semblance of a ground game.

San Francisco starts hot

But don’t expect the Niners to come out in a phone booth, banging helmets. I expect them to spread it out.

They’ll attack Seattle’s versatile Cover 2 looks by going wide. Seattle doesn’t match offensive personnel —they have more athletic freaks than the Niners’ offense does — but as the Rams showed in Week 16, that arrogance leaves Seattle susceptible to overloads.

The Niners can’t match the Rams’ three-tight-end sets; they don’t have the bodies. But they can go empty. They can go four-wide with McCaffrey bumping out and in and back out again.

Expect Brock Purdy to look like he’s back at Iowa State, playing Big 12 football — with dart-like throws into wide, intermediate lanes they couldn’t find in Week 18 — to manufacture a hot start.

The Niners fade late

That hot start will have the vibes high. It will have folks wondering if the Niners’ voodoo is, in fact, the good kind. Rational thinkers will look at a two-score San Francisco lead and think, “There is no way Sam Darnold is coming back from that.”

And they will probably be right — Darnold won’t.

But the Seahawks will.

While I expect Darnold to hand the ball over at least once (probably twice), I cannot say Purdy will protect the rock, either. Against this defense, “high risk, high reward” is usually just a surefire way to commit a turnover.

The turnover margin will likely wash out, which is bad news for San Francisco.

In the second half, the tide turns. Seattle will lean on that rest, that deafening home crowd, and that unbelievable defense to grind the weary Niners into dust at the line of scrimmage. The second half will be a slog — an ugly, grinding affair that pulls the Niners down and puts the Seahawks, steadily, unspectacularly over the top.

San Francisco gets a chance to win it late, but the team of destiny runs out of magic. Seattle gets to Purdy one too many times, and the door slams shut on what was a deeply memorable season for all the right and wrong reasons.

Final score: Seahawks 18, 49ers 13