On February 15 and 16, the 5th game of 56th Osho-sen between Osho Habu and Challenger Kisei Sato was held in Ibaraki-prefecture, Japan. Sato was a Sente(Black) player and won the game in 207 moves. You may replay the game and read comments in Japanese through this page. After the game, Habu still leads the score by 3-2. If he win the next game on March 6 and 7, he will defend the title.
The diagram above is the resignation diagram. As you see, Sato's King entered into Habu's camp to reach the dead end. Whether Habu's King could enter into Habu's camp without losing his promoted Bishop was a question in the endgame. Sente's Pawn drop on 3h as the final move in the diagram broke Gote's hope. Here are the possible variations after it.
+Bx3h R*4f N*4e G*5d K-3e G*3f(mate)
+Bx3h R*4f Kx5c P*5d Kx5d S*5e K-5c G*6d K-6b S-7c+ K-6a G*7b(mate)
+Bx3h R*4f Kx5c P*5d K-6d S*5e K-7d G*8e K-6c G*6c(mate)
+B-2h S*3g +B-1h R*4c K-3e R-4e+(!) Kx4e G*4f K-4d G*4c(mate)
+B-2h S*3g +B-1h R*4c K-3e R-4e+(!) +Bx4e G*2f K-4d G*4c(mate)
+B-2h S*3g +B-1g R*4c K-3e R-4e+(!) Kx4e G*4f K-4d G*4c(mate)
+B-2h S*3g +Bx3g R*4c K-3e Px3g K-2e +Nx5b Gx5b L*2i N*2f G*3f K-2d Lx2f K-1c N*2e K-1b Nx3c+ Nx3c Lx2c+ Kx2c B*4a L*3b P*2d Kx2d P*2e K-2c S*2d K-1b G*2c K-2a Bx3b+(mate)
+B-2g G*3g +B-1h R*4c K-3e R-4e+(!) Kx4e S*4f K-4d G*4c(mate)
+B-2g G*3g +B-1h R*4c K-3e R-4e+(!) +Bx4e S*2f K-4d G*4c(mate)
+B-2g G*3g +Bx3g R*4c K-3e Px3g K-2e +Nx5b Gx5b L*2i N*2f S*3f K-2d Lx2f K-1c N*2e K-1b Nx3c+ Nx3c Lx2c+ Kx2c B*4a L*3b P*2d Kx2d P*2e K-2c S*2d K-1b G*2c K-2a Bx3b+(mate)
There might be more variations. But Sente would be hopeless in any case.
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