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🧠 Neural Network with Backpropagation: Decision Boundary Lab (2D)

2D companion to the 3D neural network: a hand-written multilayer perceptron trained with backpropagation, SGD/momentum/Adam, L2 decay, five data sets, live decision boundary, loss curves and four in-page numerical checks including a finite-difference gradient check.

AI & Machine Learning2DModerate60 FPS📱 Mobile-adapted⇄ 3D version

⚙ Under the hood

neural networkbackpropagationmultilayer perceptrongradient checkdecision boundarymachine learningCanvas 2D

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install