hikaru vs LikeWater

White played 67. f5, advancing the f‑pawn one square. This creates a passed pawn on the f‑file, restricts Black's bishop on f6, and prepares to infiltrate Black's position. Black's only serious threat was the pawn push ...d5, which White neutralizes by gaining space and preparing to support the e‑pawn. After 67.f5, the position remains balanced but White's active pawn majority gives a long‑term winning chance.

The engine confirms 67.f5 as the optimal continuation. By pushing the pawn, White gains space on the kingside, creates a passed pawn that can become a decisive factor, and limits the Black bishop's diagonal. Any alternative, such as passive moves, would allow Black to activate the king with ...Kc8 and push ...d5, gaining the initiative. The engine's line maintains the advantage and converts the pawn majority into a concrete winning plan.

In endgames, advance passed pawns to restrict the opponent's king and pieces. A well‑timed pawn push can turn a small material edge into a decisive win.

White played 73. g7+, delivering a checking pawn promotion threat. The move forces Black's king to the only legal square, 73...Kg8, after which White will queen on g8 with a tempo. White's pawn on g7 is already unstoppable, and the check accelerates the promotion while keeping Black's king confined.

The engine's suggested move is exactly 73.g7+, confirming its optimality. By giving check, White forces the king into the corner, eliminating any defensive resources and guaranteeing promotion on the next move. Any non‑checking move would allow Black to organize a defense or create counterplay, potentially delaying promotion. The checking pawn move maximizes tempo and secures the win.

Use a passed pawn to give check and force the opponent's king into a corner, ensuring promotion. A checking pawn can be more powerful than a quiet advance because it removes the opponent's defensive options.

White delivered mate with 79. Qh4#. The queen moves to h4 delivering a direct check that the Black king on h7 cannot escape, as all flight squares are covered by White's pieces. The move ends the game instantly.

The engine lists 79.Qg6# as an alternative mating move, but both moves achieve the same result—checkmate in one. White's choice of Qh4# is perfectly valid; it exploits the same mating net, delivering the final blow. The engine's suggestion does not indicate a superior move, only another possible mate. Therefore, White's move is optimal.

Any forced mate is a win—recognize the pattern and deliver the check, even if multiple mating moves exist. Spotting the decisive check, regardless of the exact square, secures the victory.