Some planning, and setup!

"...eh? Did the teleport fail?" Issei asked, realizing that they were in the same room.

"...no, we are in a different dimension. The Devils who set up the Rating Games replicate certain locations and stick them in a pocket dimension. Said dimension's location in the metaphysical space time is not disclosed to either Peerage," Rias explained. "Looks like we are in a replica of Kuoh University. Our home turf... seems like we are being given a small handicap, given our knowledge of the area. A bit of good news..."

"If it's our turf, will we be able to promote?" Issei inquired. "If there's no enemy territory..."

"Where they start is designated enemy territory," Kiba answered. "We're good on that front, so long as you and/or Raynare can reach it."

"Attention, everyone!" Grayfia's voice came on over the intercom, before explaining the rules, the details most sticking out being that the council room of the new building was Riser's headquarters, and where they were now were was Rias's. Also, the time limit was until dawn in the human world, and that whoever had the most points left on the board should time run out before a King was "taken" would be the victor.

"Points?" Issei inquired.

"Point values are assigned to pieces," Rias explained as Kiba quickly drew up a map of their location. "Pawns are worth one, Queen is nine, Knights and Bishops are three, Rooks five, same as in regular chess. While you can't use all your Pawn Pieces, Issei, the fact that you have them still means you count as all eight... well, seven, since one has the power lent to Raynare at the moment."

"What about the King?" Issei asked. "How many points?"

"Think about it for a second, idiot," Koneko said flatly.

"...right, automatic win if the King is taken, you can't really give it a number, huh?" Issei asked.

"Exactly," Rias nodded, before looking at Kiba.

"Prez, I think we should start with taking the gym by the old school building. It will give us a path towards the new building, and let us suppress the enemy," he suggested.

"I had considered that," Rias noted. "But our first priority is securing our own turf, so they can't promote any of their Pawns. Fortunately, it's a forested area around the old building, so setting some traps shouldn't be too hard. You, Raynare, Issei and Koneko shall start with that, keeping in mind that they're likely to send a Rook to compensate for the cover we have, Akeno can set up fogs and illusions in the meanwhile. Once you have the immediate front covered, Issei, Raynare and Koneko will go ahead and try to get into Riser's headquarters, while you and Akeno finish setting up. Once half the Pawns are retired, Kiba and Akeno, you go back them up, and once our Peerage members are clear of the gym, and have drawn some enemies inside it, Akeno can destroy the building to take them out. Asia and I will remain here until all Pawns are defeated, or at least occupied, and we no longer have to worry about their promotions. Should any of you fall, I will send Akeno ahead of time. And don't hesitate to fall back and bring wounded back here to be healed by Asia should it come to it."

"Got it!" they nodded, before setting out to booby trap the living daylights out of the forest. Akeno passed out communicators as they got to work to coordinate.

...

"We've reached the gym," Issei said into the communicator, following Koneko aside Raynare, who kept sneaking glances and flushing at Issei, despite remaining focused. Issei took a moment to wonder what that was about, when they ran into four enemies.

"...three Pawns and a Rook," Koneko noted. "I'll take the Rook, you both take the Pawns."

"Got it," Issei nodded, bringing out his Gear. Raynare took a stance, and the Pawns stepped forward, the two twins of Riser's Peerage taking point, pulling freaking chainsaws out of their bags.

"We're gonna scatter you both into pieces!" they said at once, looking WAY too gleeful about it.

"CHAINSAWS!?" Issei's jaw dropped as they let the weapons rip, quickly activating the first Boost.

"Don't be a pussy, they're only dangerous if they hit... like most things, and they're pretty unwieldy. With your evasion skills, and how they're bound to telegraph, you'll be fine... still... I'm taking the one with the staff," Raynare told him quietly with a nervous chuckle.

"...who's the pussy now?" Issei asked her flatly as the two charged, looking like slasher horror movies. If they were a little smaller, given they were small adult sized and built slender, they'd fit a hybrid of the scary little girl and chainsaw killer tropes to a T!