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gmwso vs Tobias_Koelle

win
Date: 2026-03-28 13:05:19 | Game Link

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1 key moments

Game Snapshot

Benoni Defense: Old Benoni

Crucial Positions

Move #: 35
Move: hxg5
best
Endgame pawn break with positive eval swing
Crucial Position

WHAT HAPPENED

Move Played: hxg5

White played 35. hxg5, the pawn from h4 captured the black pawn on g5. The capture removes Black's only kingside pawn, eliminates the immediate black threat of ...h4, and turns the former white pawn into a passed pawn on g5. After the move the board contains white pawns on b2, c4, f4, g4 and the new pawn on g5, while Black retains pawns on b6 and f7. White still has several undefended pieces (b2, c4, g4, and the king on g1), and Black’s only undefended pieces are the b6 pawn and the king on e8.

WHY THIS MOVE IS STRONG

The engine rates hxg5 as the best move because it wins a pawn and neutralises Black’s prospective ...h4 advance. Any alternative (e.g., keeping the pawn on h4) would allow Black to push ...h4, gaining space and creating a dangerous passed pawn on the g‑file. By capturing, White not only gains material but also prevents Black from generating a passed pawn on the kingside. After 35…Ke7 the black king steps away from the centre, giving White the chance to infiltrate with the king or rook. The move therefore improves both material balance and long‑term pawn structure, whereas a non‑capturing move would leave Black’s pawn majority intact and give Black counter‑play.

KEY PRINCIPLE

Eliminate opponent's active pawn and turn it into your own passed pawn – When the opponent has an undefended pawn that can become dangerous, capture it immediately. This gains material, removes a source of counter‑play, and often creates a passed pawn that can be used in the endgame.

Master Lens

GMWSO (White) defeated Tobias Koelle in a sharp Old Benoni by turning early piece pressure into a material advantage, then converting that edge with an active rook and a decisive passed pawn in the endgame. The game shows how precise tactics and careful pawn handling can turn a seemingly equal opening into a winning battle.

What The GM Did Well By Phase

Opening

White used the check **5.Bb5+** to force Black’s bishop onto the d7‑square, then played **6.a4** to gain space on the queenside and keep the bishop trapped. After Black’s queen captured on a8, White seized the exchange with **12.Rxa8** and followed up with **13.Nxb5**, winning a pawn and leaving Black with a weak pawn structure. This demonstrates the principle of exploiting early piece activity to win material while the opponent’s pieces are still uncoordinated.

Middlegame

White pushed the central pawn with **21.e5**, opened lines, and after a series of exchanges reached a position where the rook could infiltrate. The move **31.Rf5+** forced the Black king onto e7, and the follow‑up **33.Rxe8+** eliminated Black’s last active piece, leaving White with a rook and a passed pawn. The lesson here is to use a well‑placed rook to drive the opponent’s king into the open and simplify into a winning material advantage.

Endgame

In the pawn‑ending, White played the critical **35.hxg5**, capturing Black’s g‑pawn, removing Black’s only kingside pawn and creating a passed pawn on the g‑file. This pawn, together with an active king, marched forward while Black’s king was forced to defend, eventually allowing White to capture the remaining pawn and win. The key principle is to eliminate an opponent’s active pawn and turn it into your own passed pawn, then use king activity to convert the advantage.

Game Themes

promotion fianchetto castling passed pawns bishop pair