One wrong move

"So what was that all about, Nee-san?" Okisato glared as the policewoman massaged her bruised eye.

"Sheesh, now I got a black eye, you asshole!"

"Because you jumped me. Are you still trying to notch a win off me?"

"YES!"

The man then asked the policewoman to give a report on the police. Turns out the woman was his daughter as well as Okisato’s older sister, Otona. Otona was a yakuza spy within the police and would gleefully report any happenings or plans regarding busts of her father’s gang or rival gangs to her father. As such, Yojiro Tanabe was always able to stay one step ahead of everyone, allowing him to expand his turf.

Once Okisato was able to get what he wanted from his father, he departed for school. "Good, I'm early. I can only hope Inoue-senpai doesn't find out about this. If she does, Enoki-san might die. Inoue-senpai is good at chess, but this type of odds match might shake her up badly," he thought as he checked his phone clock.

...

A day ago, Okisato received a call shortly after Mimoko left the park from Kazuya.

"I want you to pass a message to Mimoko Inoue. Tell her if she wants Utami to live, she'll come to the school roof early tomorrow morning and play me in a pawn and move odds match."

"Is that it, or is there another condition?"

"Sly one. Yes, but that's a surprise-"

"You're going to put Enoki-san in a piece, aren't you."

"... Well, seems you're smarter than you let on."

"In that case, I'll fight you instead."

"YOU!?"

"You're a Desperado aren't you? Then you should know that I was what ultimately stopped Gyro from killing Inoue-senpai."

"The oni-tiger... Very well, I shouldn't say no to an easier opponent, and a chance to hurt Mimoko Inoue even more."

...

As Okisato reached the school, he looked around before heading inside. Mimoko was nowhere to be seen, nor were there many students present. As he reached the rooftop, he put his phone away as he stared down Kazuya and a bound and gagged Utami.

"Well, seems today's my lucky day, now let's set up the board, and state the punishment; loser jumps off the roof of the school, nothing more, nothing less," Kazuya sneered as he activated his DESPER.

"Fine by me," Okisato glared as the rooftop patio quickly turned into a chess board, his pawn at f7 vanished, and Utami was imprisoned in his b-pawn. "Well that's a troublesome piece to put her in. I'm glad he agreed to fight me. If Inoue-senpai came, she'd probably end up losing Utami in the cruelest of ways. That bastard is lucky I'm going soft on the punishment for Inoue-senpai's sake," he thought.

"If you think I'll play like that stupid bald catgirl, you're wrong," Kazuya sneered as he gazed at a mini-screen and moved his pawn to e4.

"So we have to stay on the board then."

"Yes, but we can walk around as we please and view the game through a mini-screen. Though the pieces will bump us out of the way. Don't worry, they won't send you flying off, just a slight nudge is all."

"I see," Okisato nodded as he moved his pawn to c5.

"You really don't have many choices since we're playing with pawn and move odds; well, that was one of the only two good moves you could make," Kazuya sneered as he moved his pawn to d4.

"But once I get past that hurdle, it's easy," Okisato glared as he captured the pawn at d4 with his c-pawn.

Kazuya smirked as he captured the pawn at d4 with his queen while Okisato moved his knight to c6.

"You think that will deter me?" Kazuya sneered as he moved his queen to d5.

"No," Okisato replied as he moved his knight to f6.

"So predictable, but now you'll face true turmoil," Kazuya sneered as he moved his queen to b3, threatening Utami’s pawn.

"Figured you try that," Okisato glared as he moved his queen to b6.

The two then exchanged queens with Kazuya capturing Okisato's queen with his, and Okisato capturing Kazuya's with his a-pawn. Kazuya then moved his knight to c3 while Okisato moved his pawn to e6. He then moved his bishop to e3 while Okisato moved his bishop to b4.

Kazuya then castled on the queen's side, allowing Okisato to capture the knight at c3 with his bishop. Kazuya promptly captured said bishop with his b-pawn while Okisato captured the pawn at e4 with his knight.

Then, trouble struck as Kazuya captured the pawn at b6 with his bishop. "Utami is nothing but deadweight, must be aggravating making dumb moves to protect trash like her!" Kazuya sneered as Okisato captured the pawn at a2 with his rook.

"What bad move?" Okisato glared as Kazuya moved his bishop to e2.

"Oh, you'll see, soon," Kazuya taunted as Okisato captured the pawn at c3 with his knight.

Kazuya seemed unphased by the bind he was in, as he moved his king to d2, nor when Okisato captured his rook at d1 with his knight.

"I know he's far less skilled than me, but these are horrible plays. Hmm, seems like I read him like a book after all," Okisato thought as Kazuya captured the knight at d1 with his bishop.

Okisato then moved his pawn to d5 followed by Kazuya moving his knight out to f3. This gave Okisato the chance to castle on the king's side while Kazuya decided to move his remaining rook to e1. Okisato began to ease up as he moved his bishop to d7, while Kazuya began setting something up by moving his bishop to e2. Though as soon as Okisato moved his rook to c8, Kazuya's plan became apparent as he moved his rook to b1.

"So now you're trading rooks, even though you're down one?" Okisato thought as he moved his rook to a4.

"You don't need to trade. After all, it's just a pawn," Kazuya sneered as he moved his bishop to d4.

"Well, guess I should be glad he's stupid," Okisato thought as he moved his rook to b4.

Kazuya promptly captured said rook, forcing Okisato to roll his eyes as he captured Kazuya's rook with his knight. Undeterred, Kazuya advanced his knight to e5, prompting Okisato to give him a reality check by capturing his pawn at c2 with his rook. Still undeterred, Kazuya moved his king to d1 while Okisato moved his bishop to a4.

As soon as Kazuya moved his king to e1, Okisato let out a sigh. "Well... Whatever," he shrugged as he moved his knight to c6.

Kazuya let out a chuckle as he captured the knight at c6 with his knight, followed by Okisato capturing said knight with his b-pawn causing Utami to shut her eyes in terror as she began moving.

"My, you're moving that useless piece?" Kazuya sneered as he moved his pawn to f4.

"Pawns aren't useless, they can cover lots of ground and promote into queens if need be," Okisato glared as he moved his rook to c4.

"Yes, of course," Kazuya chuckled as he moved his king to d2.

"You know, Enoki-san likes the queen," Okisato glared as he captured the bishop at d4 with his rook.

"Why should I care about that trash?" Kazuya taunted as he moved his king to e3.

"You know, I think you might be worse than your brother and father. I really regret that I agreed to your paltry punishment," Okisato glared as he moved Utami's pawn to c5.

"Are you going to try and beat me with her!? Like I'd allow that to happen," Kazuya scoffed as he moved his king to f2.

Okisato rolled his eyes and moved his rook to d2, prompting Kazuya to move his pawn to g4. "Were you planning on doing something with that bishop?" Okisato glared as he advanced Utami's pawn to c4.

"Well aren't you tempting fate," Kazuya sneered as he moved his king to e3.

"I see no threats," Okisato glared as he moved Utami's pawn to c3.

"No, I want her death to be just right," Kazuya thought as he moved his king to f2.

Okisato seemed unaware of Kazuya's malicious intentions as he moved his bishop to b5. "Seems like Utami-chan's going to be the one that mates you. How poetic,"Okisato glared as Kazuya began to scowl.

"No, NO! I WON'T accept it!" Kazuya fumed as he moved his pawn to f5.

"Mate's inevitable, check," Okisato glared as he captured the bishop at e2 with his rook.

"Oh no!" Kazuya trembled in terror as he moved his king to f1.

"FINALLY! That idiot sure took his time, but now it should be an easy mate, and I'll do it as a mad queen. I couldn't ask for better poetic justice to spite Kazuya-ni with," Utami thought as the pawn she was in advanced to c2.

"No, not yet. The woman you respect so much still needs to arrive," Kazuya thought.

Suddenly, the rooftop door swung open as Shion and Kigyoku appeared alongside Mimoko.

"What's the big idea!? Why'd you drag me to the- ...!? Wh- MMPH!?" Mimoko cried as Kigyoku clamped her hand over her mouth.

"Sorry, but you need to stay quiet during the game," Shion sneered as Kazuya captured the pawn at e6 with his f-pawn.

"Hold on, the pawn Utami-chan's in can promote to a queen and mate! I guess Tanabe-kun did a decent job, but I'm mad he didn't tell me about this. Now, promote Utami-chan into a queen and put that shitty brother of hers in his place!" Mimoko happily thought.

"Yes, promote her. If I didn't do my research, I'd be sweating buckets, but ever since I found out that someone trapped within a pawn will also die if the pawn is promoted, I sought to make this scenario a reality. The stage is perfect! Okisato Tanabe will move Utami's pawn to c1, promote her to a queen, mate me, and watch in horror along with Mimoko Inoue as Utami is blown to bits and her blood and guts rain down on us. Then, I'll make my dramatic departure and jump off the roof, going to hell, and blaming the chess club for my murder. Oh, I'm such an evil genius," Kazuya maniacally thought.