From: Pieter Stouten EMBL BITNET> Date: 29 nov 1990 Subject: Last game (5) of the 1990 Ryu O Title Match. Fully annotated. Please find below the last game of the 1990 Ryu O Title Match. Challenger Tanigawa Koji won this game and he won the match with 4-1. If you discover mistakes in the following (or, indeed, in any of the other games or matches that are made available through SHOGI-L) please make the effort and let me know. Only in this way it is possible to maintain a virtual error-free archive. Enjoy ! Pieter Stouten embl bitnet> --------------------------------------------------------------------------- Ryu O Title Match 1990, Game 5: Tanigawa Koji - Habu Yoshiharu. Played on 26 and 27 November 1990. Comment by Katsuhiko Murooka. 1.P7f P3d 2.P2f P4d 3.P2e B3c 4.S4h S3b 5.P5f R4b A surprising opening. Four days before this game Habu played this opening against Katsuura and he won. On the other hand, one might suppose that Habu could not find a good way against the bishop exchange opening. 6.K6h K6b 7.K7h K7b 8.G4i-5h G4a-5b 9.P9f P9d 10.S5g K8b 11.P8f S4c 12.K8g S7b 13.S7h P6d 14.S6f G6c This seems rather old-fashioned. 14... S5d is fashionable nowadays. 15.S6f-7g P6e 16.B7i R2b 17.P6f Px6f 18.G5g P7d 19.Gx6f N7c 20.P3f P'6e 21.G6g P5d For the variations 21... P4e and 21... P8d, refer to my book "4-th file rook opening II" [pages 74-79; both his books on the 4-th file rook are really good/PS]. 21... P5d is the latest move and I think it is better than both 21... P4e and 21... P8d. 22.B4f B4b 23.P'6f P4e 23... Px6f 24.Sx6f P'6d 25.N7g P8d? 26.P7e! S8c 27.Px7d Sx7d 28.P'7e favours black, Murooka - Kikuchi 1-0, 1990. 24.B3g P3e!? 25.Px3e Px6f 26.Sx6f P'3f 27.B5i Adjourned. My opinion of the adjourned position is that it is slightly better for black. 27... R3b 28.P2d Px2d 29.N7g P8d 30.P'6e S5b 31.P5e Rx3e 32.Px5d P3g+ 33.Bx3g P4f 34.Px4f N3c 35.P'3f 35.Rx2d R2e 36.Rx2e Nx2e 37.R'2b Nx3g= 38.Rx4f+ P'4a favours white. 35... Rx3f 36.Rx2d P'6h! 37.G6gx6h The position is equal now. 37.G7i and 37.G6ix6h will meet 37... N4e 38.R2b+ B3c 39.+Rx3c Rx3c 40.Px4e R'4i, which favours white. 37... N4e 38.R2b+ P'4a 38... B3c? 39.+Rx3c Rx3c 40.Px4e strongly favours black. 39.Px4e Rx6f 40.G6g Rx6g+ 40... R3f 41.N'6d would favour black. 41.Sx6g P'5f 42.Sx5f P7e 43.N'6d If 42... G'6f?? instead of 42... P7e then 43.S5e and black will win. If 43.Px7e? instead of 43.N'6d then 43... Bx7e favours white. 43... G'6f 44.Nx7b+ Gx7b 45.S'6g S'5g 46.P6d!! A very strong, but double-edged move. Who dares to play this move in such a big title match game ! I suppose Habu may have been surprised. 46... Px7f 47.Sx7f Gx6d 48.Bx6d 48.+Rx4b?? Px4b 49.Bx6d Gx7f 50.Kx7f R'6f and white will win. Tanigawa played 48.Bx6d instantly. 48... Bx6d 49.+Rx5b B'2e? After 49.+Rx5b, Habu spent all his remaining time on his next move, but he had only 18 minutes. 49.B'7d would have given him some chances: 50.+R6a? Gx7f 51.Kx7f S'7e 52.K6g S5g-6f+ 53.K5h P'7a is good for white, but 50.S'7a Kx7a 51.R'6a K8b 52.+Rx7b (52.Rx6d+?? Bx5b and white will win) Kx7b 53.Rx6d+ and now: A) 53... Gx7g 54.Kx7g N'6e 55.K8h S'7g 56.K9g and there is no mate or B) 53... N'9e 54.Px9e Gx7g 55.Kx7g N'6e 56.K8g R'7g 57.K8h and black will win, too. 50.S'7a K9c 50... Kx7a 51.R'6a K8b 52.Rx9a+ Kx9a 53.G'9b and mate follows. 51.+Rx7b Gx7f 52.Kx7f S'7e 53.K6g S7e-6f 54.K7h Bx6i+ 55.K8i 1-0 Murooka Katsuhiko