Offensive Masterpiece by Obsidian 16.14 against Stockfish 15

This is a spectacular Najdorf Sicilian where Obsidian dev-16.14 outplays Stockfish 15 in a sharp, modern attacking line. White chooses an aggressive setup with f3, g4, and long castling, signaling a full-blooded kingside assault from the start. Black responds ambitiously but repeatedly opts for risky pawn pushes and piece maneuvers that weaken king safety.

The first major turning point comes after 19…O-O?!, when Black castles straight into a prepared attack. White’s rook lift (Rg1–Rg4–Rh4) and pawn thrust f5 create overwhelming pressure. Black’s central counterplay with …e5 and …exd4 only opens lines for White, and after the thematic sacrifice Rxh6, the Black king is dragged into the open.

From moves 23–31, White conducts a textbook attacking sequence: sacrifices, open files, and precise queen checks force Black’s king on a long and dangerous walk across the board. Even though White misses a cleaner continuation with 32.Rc1?!, the position remains completely winning thanks to the exposed king and dominant piece activity.

The later phase transitions into a technically winning endgame. Despite mutual inaccuracies, White keeps full control, calmly centralizes the king, and neutralizes Black’s remaining threats. By move 55, tablebases confirm a forced mate, and the game is correctly adjudicated as a win for White.

Overall, this is a very impressive attacking performance by Obsidian:

• strong opening preparation,
• fearless king hunt,
• and confident conversion against one of the strongest engines ever written.