On March 19 Kio Sato won the fourth game of 33rd Kio-sen 3-win match against challenger Habu in 127 moves. Sato was Sente player. The opening strategy of the game was Habu's Gokigen Nakabisha(central Rook). Sato chose the opening to develop his right Silver to 3f. He controlled the position in the middlegame and kept the lead to the end.
The diagram below is the resignation one. The possible variations after that position would be as followings;
K-9f G-8f Kx9g R-9h(mate)
K-8d B-7e Kx9e G*8f K-9d G7f-8e(mate,replayable by clicking the arrow in the right direction under the diagaram)
K-8d B-7e K-7d G*6e
K-7d G-7e(mate)
Kx9e G*8e K-9f G7f-8f Kx9g R-9h(mate)
Gote's King could not avoid forced mate in any case.
The score after the game is 2-2. The 5th(final) game will take place on March 28. Sente won last four games in this series. They say Furigoma may be important in the final game.
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