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Chess Elo Surge: A Simple Technique Changed Everything

2025-06-15

A chess player consistently performed better in blitz than bullet chess. Switching from drag-and-drop to click-and-click piece movement shaved 0.25 seconds off his average move time. This seemingly minor change resulted in a significant Elo gain in bullet chess, halving the gap between his blitz and bullet ratings. He attributes the improvement to having more time to think and less pre-moving, reducing blunders.

Fusing Unreliable Sensor Readings: Beyond Linear Mixing

2025-04-16

This article explores fusing measurements from two unreliable sensors for improved accuracy. Sensor A's readings contain noise, while Sensor B has a probability of outputting either the correct value or noise. The author first tries a linear weighted average, finding the optimal weight isn't 50/50, but around 0.58. Then, a threshold based on the difference between sensor readings is used; if the difference is below the threshold, Sensor B's reading is used, otherwise Sensor A's. This significantly improves accuracy. Finally, by adding a middle zone where a linear mix of both readings is used, further optimization is achieved, lowering the mean absolute error to 0.1163.