The Best Science Fiction and Fantasy of the Year - Volume Eight (5 page)

1

L
atifa started the web page loading, then went to make tea. The proxy she used convinced her internet provider that every page she accessed belonged to a compendium of pious aphorisms from uncontroversial octogenarians in Qom, while to the sites themselves she appeared to be a peripatetic American, logging on from Pittsburgh one day and Kansas City the next. Between the sanctions against her true host country and that host's paranoia over the most innocent interactions with the West, these precautions were essential. But they slowed down her already sluggish connection so effectively that she might as well have been rehearsing for a flight to Mars.

The sound of boiling water offered a brief respite from the televised football match blaring down from the apartment above. "Two nil in favour of the Black Pearls, with fifteen minutes left to play! It's looking like victory for the home team here in Samen Stadium!" When the tea had brewed, she served it in a small glass for her grandfather to sip through a piece of hard sugar clenched between his teeth. Latifa sat with him for a while, but he was listening to the shortwave radio, straining to hear Kabul through the hum of interference and the breathless commentary coming through the ceiling, and he barely noticed when she left.

Back in her room after fifteen minutes, she found the scratched screen of the laptop glistening with a dozen shiny ball-and-stick models of organic molecules. Reading the colour coding of the atoms was second nature to her by now: white for hydrogen, black for carbon, cherry red for oxygen, azure for nitrogen. Here and there a yellow sulfur atom or a green chlorine stood out, like a chickpea in a barrel of candy.

All the molecules that the ChemFactor page had assigned to her were nameless – unless you counted the formal structural descriptions full of cis-1,3-dimethyl-this and 2,5-di-tert-butyl-that – and Latifa had no idea which, if any of them, had actually been synthesised in a lab somewhere. Perhaps a few of them were impossible beasts, chimeras cranked out by the software's mindless permutations, destined to be completely unstable in reality. If she made an effort, she could probably weed some of them out. But that could wait until she'd narrowed down the list of candidates, eliminating the molecules with no real chance of binding strongly to the target.

The target this time was an oligosaccharide, a carbohydrate with nine rings arranged in pleasingly asymmetric tiers, like a small child's attempt to build a shoe rack. Helpfully, the ChemFactor page kept it fixed on the screen as Latifa scrolled up and down through the long catalogue of its potential suitors.

She trusted the software to have made some sensible choices already, on geometric grounds: all of these molecules ought to be able to nestle reasonably snugly against the target. In principle she could rotate the balland-stick models any way she liked, and slide the target into the same view to assess the prospective fit, but in practice that made the laptop's graphics card choke. So she'd learnt to manipulate the structures in her head, to picture the encounter without fretting too much about precise angles and distances. Molecules weren't rigid, and if the interaction with the target liberated enough energy the participants could stretch or flex a little to accommodate each other. There were rigorous calculations that could predict the upshot of all that give and take, but the equations could not be solved quickly or easily. So ChemFactor invited people to offer their hunches. Newcomers guessed no better than random, and many players' hit rates failed to rise above statistical noise. But some people acquired a feel for the task, learning from their victories and mistakes – even if they couldn't put their private algorithms into words.

Latifa didn't over-think the puzzle, and in twenty minutes she'd made her choice. She clicked the button beside her selection and confirmed it, satisfied that she'd done her best. After three years in the game she'd proved to be a born chemical match-maker, but she didn't want it going to her head. Whatever lay behind her well-judged guesses, it could only be a matter of time before the software itself learnt to codify all the same rules. The truth was, the more successful she became, the faster she'd be heading for obsolescence. She needed to make the most of her talent while it still counted.

L
atifa spent two hours on her homework, then a call came from her cousin Fashard in Kandahar. She went out onto the balcony where the phone could get a better signal.

"How is your grandfather?" he asked.

"He's fine. I'll ask him to call you back tomorrow." Her grandfather had given up on the shortwave and gone to bed. "How are things there?"

"The kids have all come down with something," Fashard reported. "And the power's been off for the last two days."

"
Two days?
" Latifa felt for her young cousins, sweltering and feverish without even a fan. "You should get a generator."

"Ha! I could get ten; people are practically giving them away."

"Why?"

"The price of diesel's gone through the roof," Fashard explained. "Blackouts or not, no one can afford to run them."

Latifa looked out at the lights of Mashhad. There was nothing glamorous about the concrete tower blocks around her, but the one thing Iran didn't lack was electricity. Kandahar should have been well-supplied by the Kajaki Dam, but two of the three turbines in the hydroelectric plant had been out of service for more than a year, and the drought had made it even harder for the remaining turbine to meet demand.

"What about the shop?" she asked.

"Pedalling the sewing machine keeps me fit," Fashard joked.

"I wish I could do something."

"Things are hard for everyone," Fashard said stoically. "But we'll be all right; people always need clothes. You just concentrate on your studies."

Latifa tried to think of some news to cheer him up. "Amir said he's planning to come home this Eid." Her brother had made no firm promises, but she couldn't believe he'd spend the holidays away from his family for a second year in a row.

"Inshallah," Fashard replied. "He should book the ticket early though, or he'll never get a seat."

"I'll remind him."

There was no response; the connection had cut out. Latifa tried calling back but all she got was a sequence of strange beeps, as if the phone tower was too flustered to offer up its usual recorded apologies.

She tidied the kitchen then lay in bed. It was hard to fall asleep when her thoughts cycled endlessly through the same inventory of troubles, but sometime after midnight she managed to break the loop and tumble into blackness.

"A
fghani slut," Ghamzeh whispered, leaning against Latifa and pinching her arm through the fabric of her manteau.

"Let go of me," Latifa pleaded. She was pressed against her locker, she couldn't pull away. Ghamzeh turned her face towards her, smiling, as if they were friends exchanging gossip. Other students walked past, averting their eyes.

"I'm getting tired of the smell of you," Ghamzeh complained. "You're stinking up the whole city. You should go back home to your little mud hut."

Latifa's skin tingled between the girl's blunt talons, warmed by broken blood vessels, numbed by clamped nerves. It would be satisfying to lash out with her fists and free herself, but she knew that could only end badly.

"Did they have soap in your village?" Ghamzeh wondered. "Did they have underwear? All these things must have been so strange to you, when you arrived in civilisation."

Latifa waited in silence. Arguing only prolonged the torment.

"Too stuck up to have a conversation?" Ghamzeh released her arm and began to move away, but then she stopped to give Latifa a parting smile. "You think you're impressing the teachers when you give them all the answers they want? Don't fool yourself, slut. They know you're just an animal doing circus tricks."

W
hen latifa had cleared away the dinner plates, her grandfather asked her about school.

"You're working hard?" he pressed her, cross-legged on the floor with a cushion at his back. "Earning their respect?"

"Yes."

"And your heart is still set on engineering?" He sounded doubtful, as if for him the word could only conjure up images of rough men covered in machine oil.

"Chemical engineering," she corrected him gently. "I'm getting good grades in chemistry, and there'd be plenty of jobs in it."

"After five more years. After university."

"Yes." Latifa looked away. Half the money Amir sent back from Dubai was already going on her school fees. Her brother was twenty-two; no one could expect him to spend another five years without marrying.

"You should get on with your studies then." Her grandfather waved her away amiably, then reached over for the radio.

In her room, Latifa switched on the laptop before opening her history book, but she kept her eyes off the screen until she'd read half the chapter on the Sassanid kings. When she finally gave herself a break the ChemFactor site had loaded, and she'd been logged in automatically, by cookie.

A yellow icon of a stylised envelope was flashing at the top of the page. A fellow player she'd never heard of called "jesse409" had left her a message, congratulating "PhaseChangeGirl" on a cumulative score that had just crossed twenty thousand. Latifa's true score was far higher than that, but she'd changed her identity and rejoined the game from scratch five times so far, lest she come to the notice of someone with the means to find out who she really was.

The guess she'd made the previous night had paid off: a rigorous model of the two molecules showed that the binding between them was stable. She had saved one of ChemFactor's clients the time and expense of doing the same calculations for dozens of alternatives, and her reward was a modest fraction of the resources she'd effectively freed. ChemFactor would model any collection of atoms and molecules she liked, free of charge – up to a preset quota in computing time.

Latifa closed her history book and moved the laptop to the centre of her desk. If the binding problems were easy for her now, when it came to the much larger challenge she'd set herself the instincts she'd honed on the site could only take her so far. The raw computing power that she acquired from these sporadic prizes let her test her hunches and see where they fell short.

She dug out the notebook from her backpack and reviewed her sketches and calculations. She understood the symmetries of crystals, the shifts and rotations that brought any regular array of atoms back into perfect agreement with itself. She understood the thrillingly strange origins of the different varieties of magnetism, where electrons' spins became aligned or opposed – sometimes through their response to each other's magnetic fields, but more often through the Exclusion Principle, which linked the alignment of spin to the average distance between the particles, and hence the energy they needed in order to overcome electrostatic repulsion. And after studying hundreds of examples, she believed she had a sense for the kind of crystal that lay in a transition zone where one type of magnetism was on the verge of shifting to another.

She'd sketched her ideal crystal in the notebook more than a year before, but she had no proof yet that it was anything more than a fantasy. Her last modelling run had predicted something achingly close, but it had still not produced what she needed. She had to go back one step and try something different.

Latifa retrieved the saved data from that last attempt and set the parameters for the new simulation. She resisted the urge to stab the CONFIRM button twice; the response was just taking its time weaving its way back to her through the maze of obfuscation.

Estimated time for run: approximately seven hours.

She sat gazing at the screen for a while, though she knew that if she waited for the prediction to be updated she'd probably find that the new estimate was even longer.

Reluctantly, she moved the laptop to the floor and returned to the faded glory of the Sassanids. She had to be patient; she'd have her answer by morning.

"W
hore," Ghamzeh muttered as Latifa hurried past her to her desk.

"You're ten minutes late, Latifa," Ms Keshavarz declared irritably.

"I'm very sorry." Latifa stood in place, her eyes cast down.

"So what's your excuse?"

Latifa remained silent.

"If you overslept," Ms Keshavarz suggested, "you should at least have the honesty to say so."

Latifa had woken at five, but she managed a flush of humiliation that she hoped would pass for a kind of tacit admission.

"Two hours of detention, then," Ms Keshavarz ruled. "It might have been half that if you'd been more forthcoming. Take your seat, please."

The day passed at a glacial speed. Latifa did her best to distract herself with the lessons, but it was like trying to chew water. The subject made no difference: history, literature, mathematics, physics – as soon as one sentence was written on the blackboard she knew exactly what would follow.

In detention with four other girls, she sat copying pages of long-winded homilies. From her seat she could see a driveway that led out from the staff car park, and one by one the vehicles she most needed to depart passed before her eyes. The waiting grew harder than ever, but she knew it would be foolish to act too soon.

Eighty minutes into her punishment, she started holding her breath for ever longer intervals. By the time she raised her hand there was nothing feigned in her tone of discomfort. The supervising teacher, Ms Shirazi, raised no objections and played no sadistic games with her. Latifa fled the room with plausible haste.

The rest of the school appeared deserted; the extra time had been worth it. Latifa opened the door to the toilets and let it swing shut, leaving the sound echoing back down the corridor, then hurried towards the chemistry lab.

The students' entrance was locked, but Latifa steeled herself and turned into the warren of store rooms and cubicles that filled the north side of the science wing. Her chemistry teacher, Ms Daneshvar, had taken her to her desk once to consult an old university textbook, to settle a point on which they'd both been unsure.