Author and ChessMotive founder
Sebastian Kostolansky
International Master
International Master and ChessMotive founder focused on practical decision making, candidate moves, calculation, and evaluation.
View official FIDE profile →FIDE ID 14950596
Published guides
Chess improvement by Sebastian

How to Stop Blundering in Chess
Aug 22, 2026 · 16 min read
A practical system for finding the cause of your mistakes and training the skill that actually failed.

How to Build a Chess Training Plan
Aug 22, 2026 · 18 min read
Practical 30 minute, 60 minute, and five hour weekly plans, plus a method for adapting them to your weaknesses.

How to Evaluate a Chess Position
Aug 27, 2026 · 17 min read
An International Master explains how to combine material, development, king safety, pawn structure, practicality, and concrete calculation.

How to Find the Best Move in Chess
Aug 28, 2026 · 14 min read
An International Master’s four-step process for evaluating the position, generating candidates, comparing lines, and deciding what to play.