31-st Oi Title Match 1990 (professional, no comment). The 31st Oi match will be a match to remember. For me personally because I met Mr. Sato several times (both in Europe and Japan) and because I was present at the 7th game in Hadano-city in Japan. But there was more to this match. It was a high-level battle between a young star (Sato, only 21 years old) and an established player (Tanigawa, top player for more than 7 years, although only 28 years old). Every game (except maybe the 7th) showed exciting top shogi and was a credit to both players. In the end, Tanigawa just managed to decide the match in his favour in the unfortunately rather one-sided 7th game. Interesting detail that shows how strong Tanigawa was at that moment: none of the professionals present in the analysis room managed to come up with Tanigawa's final move. Below are given six out of seven game scores of the 31-st Oi title match (1990) between Tanigawa Koji (Oi) and Sato (challenger), played between 12-th July and 21-st September. Time limits in all games are 8 hours each plus one minute byoyomi. The results: Game 1. Tanigawa - Sato 0-1 Game 2. Sato - Tanigawa 0-1 Game 3. Tanigawa - Sato 1-0 Game 4. Sato - Tanigawa 1-0 Game 5. Tanigawa - Sato 1-0 Game 6. Sato - Tanigawa 1-0 Game 7. Sato - Tanigawa 0-1 Final score: Tanigawa - Sato 4-3 Reijer Grimbergen Submitted 12-th October 1990. Erwin Unruh. Corrected 12-th November 1990. Pieter Stouten Corrected and archived 14-th November 1990. Updated (added game 5) 6-th January 1991. --------------------------------------------------------------------------- 31-st Oi Title Match, 1-st game, July 12-th and 13-th 1990. Black: Tanigawa, Oi; White: Sato, 5-dan 1.P2f P8d 2.P2e P8e 3.G7h G3b 4.P2d Px2d 5.Rx2d P'2c 6.R2f S7b 7.P1f P1d 8.S3h P6d 9.P7f P8f 10.Px8f Rx8f 11.P'8g R8b 12.P3f P3d 13.S3g S6c 14.P3e Px3e 15.S4f S5d 16.K5h Bx8h+ 17.Sx8h S2b 18.P'3d G5b 19.G3h P4d 20.P7e K4b 21.Sx3e S4c 22.N7g P'3c 23.Px3c+ Sx3c 24.P7d Px7d 25.P'7b Rx7b 26.B'8c R7c 27.B6a+ G5a 28.N8e Gx6a 29.Nx7c+ Nx7c 30.R'8a S5b 31.Rx9a+ N6e 32.G4h B'3i 33.G6h P'3d 34.S4f N'7f 35.G6i Nx8h+ 36.L'6c +N7h 37.Gx7h S'6i 38.Kx6i Bx4h+ 39.R2h B'5h 40.K7i +B5i 41.Lx6a+ +B6i 0-1 Time used = Black 6.19, White 7.22 --------------------------------------------------------------------------- 31-st Oi Title Match, 2-nd game, July 23-rd and 24-th 1990. Black: Sato, 5-dan; White: Tanigawa, Oi 1.P7f P8d 2.S6h P3d 3.S7g S6b 4.P5f S4b 5.S4h P5d 6.G4i-5h G3b 7.P6f K4a 8.G6g G5b 9.B7i S3c 10.P3f B3a 11.K6h P4d 12.K7h G5b-4c 13.K8h B6d 14.S3g P8e 15.G7h P7d 16.S4f K3a 17.N3g S5c 18.P1f P1d 19.P2f K2b 20.R5h B7c 21.P5e Px5e 22.Sx5e P'5d 23.S4f S6d 24.R3h S2d 25.L1g S5e 26.S5g N3c 27.P4f P3e 28.P2e Nx2e 29.Nx2e Sx2e 30.Px3e S2f 31.P6e Sx1g+ 32.P'5f +S2g 33.R3i N'8f 34.Px5e Nx7h+ 35.Kx7h P'3f 36.Px5d P3g+ 37.R5i L'8c 38.S5g-6h +P4h 39.R5g P8f 40.Px8f Lx8f 41.Sx8f Rx8f 42.P'8g S'6i 43.K8h R8b 44.P5c+ G'4g 45.+Px4c Gx5g 46.+Px3b Kx3b 47.G'7g +P5h 48.Sx5g R'3h 49.S6h +Px6h 50.Gx6h Bx4f 51.P'5h Sx5h+ 52.L'3d K4c 53.L3c+ K5c 54.S'4g +Sx6h 55.Sx3h +Sx7i 56.R'5f S'5e 57.Rx4f Sx4f 58.B'7a K5d 59.Bx8b+ G'7h 60.Gx7h +Sx7h 61.Kx7h B'5f 62.K7g B6g+ 0-1 Time used = Black: 7.59, White: 7.02 --------------------------------------------------------------------------- 31-st Oi Title Match, 3-rd game, August 9-th and 10-th 1990. Black: Tanigawa, Oi; White: Sato, 5-dan 1.P7f P8d 2.P2f P8e 3.B7g P3d 4.S8h G3b 5.G7h Bx7g+ 6.Sx7g S2b 7.S3h S7b 8.P4f S3c 9.S4g P6d 10.G5h S6c 11.P3f P1d 12.P1f P7d 13.K6h N7c 14.P6f G6b 15.P2e R8a 16.N3g K4b 17.S5f K3a 18.K7i S5d 19.K8h P6e 20.P3e P4d 21.P4e B'6d 22.R2g Px6f 23.P2d Px2d 24.Px3d Sx3d 25.Px4d P8f 26.Sx8f P'3f 27.Rx2d S2c 28.Rx2c+ Gx2c 29.P4c+ Sx4c 30.B'4e R'2h 31.Bx8a+ Rx5h+ 32.+Bx3f +Rx5g 33.P'4d G'6h 34.R'2h Gx7h 35.Kx7h +Rx5f 36.G'4b Kx4b 37.Px4c+ K5a 38.S'5b Gx5b 39.+Px5b Kx5b 40.S'4c 1-0 Time used = Black: 6.30, White:7.40 --------------------------------------------------------------------------- 31-st Oi Title Match, 4-th game, August 23-rd and 24-th 1990. Black: Sato, 5-dan; White: Tanigawa, Oi 1.P7f P8d 2.S6h P3d 3.S7g S6b 4.P5f S4b 5.S4h P5d 6.G4i-5h G3b 7.P6f K4a 8.G6g P6d 9.P2f S6c 10.P2e P5e 11.Px5e Bx5e 12.G7h P7d 13.K6i S5d 14.P2d Px2d 15.Rx2d P'2c 16.R2h B2b 17.S5g S5c 18.S7g-6h G5b 19.K7i G6c 20.P3f P8e 21.B7g N7c 22.P'5f P1d 23.P9f P9d 24.S4f S4d 25.P1f P'5e 26.Px5e S4dx5e 27.P'5f Sx4f 28.Px4f P8f 29.Px8f P'8e 30.Px8e Nx8e 31.B8f P6e 32.P'8c R9b 33.S5g Px6f 34.Gx6f P'6e 35.P'6d G6b 36.G5e Sx5e 37.Px5e Bx5e 38.P8b+ Rx8b 39.S'7a S'7g 40.Nx7g Nx7g+ 41.Bx7g Bx7g+ 42.Gx7g G'8i 43.K6i R8h+ 44.Rx8h Gx8h 45.K5h R'2h 46.N'4h P'5f 47.Sx6b+ Px5g+ 48.Kx5g K3a 49.S'4a B'6h 50.K5f Bx7g+ 51.Sx3b+ Kx3b 52.S'4a Kx4a 53.G'4b 1-0 Time used = Black: 6.06, White:7.56 --------------------------------------------------------------------------- 31-st Oi Title Match, 5-th game, August 30-th and 31-st 1990. Black: Tanigawa, Oi; White: Sato, 5-dan 1.P7f P8d 2.P2f P8e 3.B7g P3d 4.S8h G3b 5.G7h Bx7g+ 6.Sx7g S4b 7.S3h S7b 8.P4f P6d 9.S4g S6c 10.G5h P1d 11.P1f P9d 12.P9f G5b 13.P3f K4a 14.S5f S5d 15.K6h P4d 16.P6f P7d 17.K7i K3a 18.N3g N7c 19.P2e P6e 20.Px6e P7e 21.P2d Px2d 22.P'2e Px2e 23.Px7e Nx6e 24.Sx6e Sx6e 25.Rx2e B'4c 26.P'2b P'2d 27.Px2a+ Kx2a 28.Rx2d P'2c 29.R2h P'7f 30.S6h S6f 31.N'5f P8f 32.Px8f P'8h 33.Nx4d Px8i+ 34.K6i S'7g 35.Nx3b+ Bx3b 36.N'4d Sx7h+ 37.K5i N'2d 38.Nx3b+ Kx3b 39.K4i N'4d 40.S5i N4dx3f 41.R2e +S6i 42.P'3c Sx3c 43.N4e N'4a 44.P'3g +Sx5i 45.Gx5i P'4d 46.Px3f Px4e 47.B'6e S'5d 48.Bx5d Px5d 49.B'6d B'4g 50.G4h Bx3f+ 51.G'3a K2b 52.Gx4a N'5c 53.S'3a K2a 54.P'2b K3b 55.Bx8b+ +Bx2e 56.N'4d Sx4d 57.R'4b K3c 58.Rx4d+ Kx4d 59.N'5f 1-0 Time used = Black: 5.38, White: 7.59 --------------------------------------------------------------------------- 31-st Oi Title Match, 6-th game, September 10-th and 11-th 1990. Black: Sato, 5-dan; White: Tanigawa, Oi 1.P7f P8d 2.S6h P3d 3.S7g S6b 4.P5f S4b 5.S4h P5d 6.G4i-5h G3b 7.P6f K4a 8.G6g G5b 9.B7i S6b-5c 10.P2f P6d 11.P2e R6b 12.G7h P6e 13.Px6e Rx6e 14.P'6f R6a 15.P3f S6d 16.P2d Px2d 17.Bx2d P'2c 18.B4f P4d 19.B3g P4e 20.K6i K3a 21.S5g S4c 22.K7i P9d 23.P9f G5b-4b 24.P1f P5e 25.P4f Px5f 26.Sx5f Px4f 27.Bx4f P'5e 28.S4g P'4e 29.B6h P'6e 30.P'2d Px2d 31.P'2e Px2e 32.P'2d B4d 33.Px6e Sx6e 34.P'6f S6e-5d 35.Rx2e P'2b 36.N3g N9c 37.R2h N8e 38.P'4f Nx7g+ 39.G6gx7g Px4f 40.Sx4f S'5f 41.P'4e B5c 42.K8h P'6e 43.Px6e P'6f 44.Gx6f S5dx6e 45.Gx6e Rx6e 46.P'6f R6c 47.Sx5e G'6g 48.P'5d Gx7h 49.Kx7h G'6g 50.K8h Gx6h 51.Px5c+ Rx5c 52.P'5d Sx5d 53.S'4d Sx5e 54.Sx5c+ B'7i 55.K9h Gx5c 56.B'8f P'5b 57.R'6a P'4a 58.Bx6h Bx6h+ 59.Rx6h B'4f 60.G'5a K4b 61.Gx4a K3c 62.N'2e Kx2d 63.G'1e K2c 64.P'2d K1b 65.G4b Bx6h+ 66.Rx2a+ 1-0 Time used = Black: 6.31, White:7.59 --------------------------------------------------------------------------- 31-st Oi Title Match, 7-th game, September 20-th and 21-st 1990. Black: Sato, 5-dan; White: Tanigawa, Oi 1.P7f P8d 2.S6h P3d 3.S7g S6b 4.P5f G3b 5.S4h K4a 6.G4i-5h P6d 7.G7h B3c 8.K6i S2b 9.P6f S6c 10.G5h-6g B5a 11.P3f P7d 12.B7i B7c 13.S3g S3c 14.S4f P4d 15.N3g P8e 16.P2f S5d 17.P5e S4c 18.B6h G5b 19.K7i B8d 20.R3h S2d 21.P1f P1d 22.K8h N7c 23.N2e P6e 24.Px6e Nx6e 25.S6f P'6d 26.P9f P9d 27.L1g G5b-4b 28.R1h K3a 29.P3e Px3e 30.P1e Px1e 31.P'1c Lx1c 32.Sx3e Sx2e 33.Px2e P'3d 34.S4f P9e 35.Px9e P'9g 36.Lx9g P4e 37.Sx4e Bx6f 38.Gx6f S'5g 39.G6f-6g Sx6h+ 40.Rx6h P'9f 41.Lx9f N'8d 42.K9h Nx9f 43.B'7c R9b 44.S'9g P7e 45.Sx9f Px7f 46.Bx6d+ P7g+ 47.Nx7g Nx7g+ 48.G6gx7g P'7f 49.Gx7f N'8d 50.+B7c Rx9e 51.R6a+ P'4a 52.Sx9e Lx9e 53.K8i Nx7f 54.+Bx9e S'9g 55.S'7g B'5g 56.P'9h L'8h 57.Sx8h Sx8h+ 58.Gx8h S'9g 0-1 Time used = Black: 6.29, White:7.59