Neural Ninjas · Rune Forge Arena

Assemble the Spell. Defeat the Boss.

Tap the code fragments, snap them into place, cast. No typing — just the right pieces in the right order.

🏆 0

🔥 x0

Sigma the Summoner

⭐⭐

📐 Incoming attack — the formula

💠 Tap a fragment, then tap a slot

🧠 Math-to-Code Dictionary

Symbol	Name / Concept	Code Weapon	Mental Model
Σ	Sigma — Summation	np.sum()	Looks like a sideways E — stands for Sum
∏	Pi — Product	np.prod()	Looks like a gate — everything multiplies through
∂	Partial derivative	.backward()	Derivative through a network = backpropagation
e	Euler's number	np.exp()	e to a power = exponentiation = exp()
θ	Theta — Parameters	optimizer.step()	Updating θ is one optimizer step
P	Softmax probability	F.softmax()	P(y) is a probability distribution — softmax builds one
σ	Sigma — Std Dev	.std()	Lowercase σ = standard deviation = .std()
QKV	Attention	scaled_dot_product_attention()	Query, Key, Value — three letters, one word: Attention
Ω	Omega — Final layer	torch.sigmoid()	Always the last letter — always the final layer