In the 51st Go Master League challenger decision league tournament, on the 9th, Katsuya Momoki, playing as Black, secured a middle-game victory over Toramaru Shibano by 174 moves, marking his score as 3 wins and 1 loss, which places him in the interim lead. Last year's challenger, Shibano, now sits with 2 wins and 1 loss, highlighting a competitive environment where all players have already been tested early on. During the game, Momoki managed to break through in the opening move contest, while Shibano took a significant risk by making aggressive moves in the middle game, leading to complex reading battles. Ultimately, Momoki overcame Shibano's attempts and decisively captured Shibano's large stone, solidifying his victory without giving Shibano noticeable opportunities to turn the game around. Momoki has demonstrated impressive consistency, having achieved five wins this year alone, and his ability to maintain composure under high pressure is a testament to his skill. As the league progresses, the competition is heating up, with no undefeated players left, indicating that the upcoming matches will be crucial in determining who will take the title in this tightly contested league.