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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>FLAIR Research Lab - Blog Posts</title>
<meta name="description" content="Blog posts and research publications from the Foerster Lab for AI Research (FLAIR) at the University of Oxford">
<!-- Tailwind CSS -->
<script src="https://cdn.tailwindcss.com"></script>
<!-- Custom CSS for FLAIR colors and modern styling -->
<script>
tailwind.config = {
theme: {
extend: {
colors: {
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body {
font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
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background: linear-gradient(white, white) padding-box,
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line-height: 1.3;
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padding-bottom: 0.1em;
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</style>
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<!-- Header -->
<header class="bg-white/95 backdrop-blur-md sticky top-0 z-50">
<div class="max-w-7xl mx-auto px-6 lg:px-8">
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<div class="flex items-center">
<img src="assets/flair_logo.png" alt="FLAIR Logo" class="h-12 w-auto object-contain">
</div>
<a href="https://foersterlab.com/"
class="px-6 py-3 bg-gray-100 hover:bg-gray-200 text-gray-700 font-medium rounded-2xl transition-all duration-200 hover:scale-105">
FLAIR Lab →
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<!-- Hero Section & Publications -->
<section class="bg-white py-20 relative overflow-hidden">
<div class="max-w-7xl mx-auto px-6 lg:px-8 text-center">
<div class="max-w-4xl mx-auto mb-20">
<h1 class="text-4xl md:text-5xl lg:text-6xl font-bold mb-8 text-gray-900">
FLAIR Blog
</h1>
<p class="text-lg md:text-xl text-gray-600 mb-6 leading-relaxed font-medium">
Research blog posts from the Foerster Lab for AI Research (FLAIR) at the University of Oxford
</p>
<p class="text-base md:text-lg text-gray-500 font-normal">
Latest publications and findings from our lab
</p>
</div>
</div>
<!-- Blog Posts Grid -->
<main class="max-w-7xl mx-auto px-6 lg:px-8">
<div class="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-3 gap-8">
<!-- AH2AC2 -->
<article class="group bg-white rounded-2xl card-hover overflow-hidden">
<div class="p-6">
<div class="flex justify-between items-start mb-5">
<span class="px-3 py-1 bg-violet-50 text-violet-700 text-xs font-medium rounded-lg">Benchmark</span>
<span class="text-xs text-gray-500 font-mono">June 2025</span>
</div>
<h3 class="text-lg font-semibold mb-3 text-gray-900 group-hover:text-gray-700 transition-colors duration-200">
<a href="https://blog.foersterlab.com/ah2ac2/" class="block">
AH2AC2: Ad-Hoc Human-AI Coordination Challenge
</a>
</h3>
<p class="text-gray-600 mb-4 text-sm leading-relaxed">
AH2AC2 is a benchmark for evaluating how well AI agents can coordinate with humans in the complex, partially observable, cooperative game Hanabi, especially when access to human data is limited.
</p>
<a href="https://blog.foersterlab.com/ah2ac2/"
class="inline-flex items-center text-gray-700 hover:text-gray-900 text-sm font-medium transition-colors duration-200">
Continue Reading →
</a>
</div>
</article>
<!-- Fixing TD Part II -->
<article class="group bg-white rounded-2xl card-hover overflow-hidden">
<div class="p-6">
<div class="flex justify-between items-start mb-5">
<span class="px-3 py-1 bg-blue-50 text-blue-700 text-xs font-medium rounded-lg">Reinforcement Learning</span>
<span class="text-xs text-gray-500 font-mono">March 2025</span>
</div>
<h3 class="text-lg font-semibold mb-3 text-gray-900 group-hover:text-gray-700 transition-colors duration-200">
<a href="https://blog.foersterlab.com/fixing-td-part-2/" class="block">
Fixing TD Part II: Overcoming the Deadly Triad
</a>
</h3>
<p class="text-gray-600 mb-4 text-sm leading-relaxed">
In Part I of this blog, we characterised the stability of TD through the TD Jacobian. In this part, we now build on this analysis to better understand the reasons for instability before proposing a surprisingly simple architectural solution that can stabilise TD.
</p>
<a href="https://blog.foersterlab.com/fixing-td-part-2/"
class="inline-flex items-center text-gray-700 hover:text-gray-900 text-sm font-medium transition-colors duration-200">
Continue Reading →
</a>
</div>
</article>
<!-- Fixing TD Part I -->
<article class="group bg-white rounded-2xl card-hover overflow-hidden">
<div class="p-6">
<div class="flex justify-between items-start mb-5">
<span class="px-3 py-1 bg-blue-50 text-blue-700 text-xs font-medium rounded-lg">Reinforcement Learning</span>
<span class="text-xs text-gray-500 font-mono">March 2025</span>
</div>
<h3 class="text-lg font-semibold mb-3 text-gray-900 group-hover:text-gray-700 transition-colors duration-200">
<a href="https://blog.foersterlab.com/fixing-td-part-1/" class="block">
Fixing TD Part I: Why is Temporal Difference Learning so Unstable?
</a>
</h3>
<p class="text-gray-600 mb-4 text-sm leading-relaxed">
In this first blog of a two-part series, we take a deep dive into understanding the challenges faced when developing stable TD algorithms and introduce a powerful tool to formally characterise TD's instability mathematically.</p>
<a href="https://blog.foersterlab.com/fixing-td-part-1/"
class="inline-flex items-center text-gray-700 hover:text-gray-900 text-sm font-medium transition-colors duration-200">
Continue Reading →
</a>
</div>
</article>
<!-- PARDEN -->
<article class="group bg-white rounded-2xl card-hover overflow-hidden">
<div class="p-6">
<div class="flex justify-between items-start mb-5">
<span class="px-3 py-1 bg-red-50 text-red-700 text-xs font-medium rounded-lg">Security</span>
<span class="text-xs text-gray-500 font-mono">May 2024</span>
</div>
<h3 class="text-lg font-semibold mb-3 text-gray-900 group-hover:text-gray-700 transition-colors duration-200">
<a href="https://blog.foersterlab.com/parden/" class="block">
PARDEN, Can You Repeat That? Defending against Jailbreaks via Repetition
</a>
</h3>
<p class="text-gray-600 mb-4 text-sm leading-relaxed">
We prompt the LLM to repeat its own output, which protects the model from adversarial attacks by avoiding the auto-regressive trap. We name this method PARDEN. PARDEN is particularly effective in the relevant regime of high True Positive Rate and low False Positive Rate.
</p>
<a href="https://blog.foersterlab.com/parden/"
class="inline-flex items-center text-gray-700 hover:text-gray-900 text-sm font-medium transition-colors duration-200">
Continue Reading →
</a>
</div>
</article>
<!-- BLP -->
<article class="group bg-white rounded-2xl card-hover overflow-hidden">
<div class="p-6">
<div class="flex justify-between items-start mb-5">
<span class="px-3 py-1 bg-orange-50 text-orange-700 text-xs font-medium rounded-lg">Environment Design</span>
<span class="text-xs text-gray-500 font-mono">April 2024</span>
</div>
<h3 class="text-lg font-semibold mb-3 text-gray-900 group-hover:text-gray-700 transition-colors duration-200">
<a href="https://blog.foersterlab.com/blp/" class="block">
Refining Minimax Regret for Unsupervised Environment Design
</a>
</h3>
<p class="text-gray-600 mb-4 text-sm leading-relaxed">
In summary, we show that minimax regret has a notable failure case when there are environments with high irreducible regret. Our solution concept can address this problem, and ReMiDi results in higher empirical performance in cases like these.
</p>
<a href="https://blog.foersterlab.com/blp/"
class="inline-flex items-center text-gray-700 hover:text-gray-900 text-sm font-medium transition-colors duration-200">
Continue Reading →
</a>
</div>
</article>
<!-- JaxMARL -->
<article class="group bg-white rounded-2xl card-hover overflow-hidden">
<div class="p-6">
<div class="flex justify-between items-start mb-5">
<span class="px-3 py-1 bg-emerald-50 text-emerald-700 text-xs font-medium rounded-lg">Multi-Agent</span>
<span class="text-xs text-gray-500 font-mono">November 2023</span>
</div>
<h3 class="text-lg font-semibold mb-3 text-gray-900 group-hover:text-gray-700 transition-colors duration-200">
<a href="https://blog.foersterlab.com/jaxmarl/" class="block">
JaxMARL: Multi-Agent RL Environments and Algorithms in JAX
</a>
</h3>
<p class="text-gray-600 mb-4 text-sm leading-relaxed">
We present JaxMARL, a library of multi-agent reinforcement learning (MARL) environments and algorithms based on end-to-end GPU acceleration that achieves up to 12500x speedups.</p>
<a href="https://blog.foersterlab.com/jaxmarl/"
class="inline-flex items-center text-gray-700 hover:text-gray-900 text-sm font-medium transition-colors duration-200">
Continue Reading →
</a>
</div>
</article>
</div>
</main>
</section>
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Foerster Lab for AI Research, University of Oxford
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© 2025 FLAIR Research Lab. All rights reserved.
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