Recently, for HD video recorders, a high density rewritable disc system using a blue laser diode has been strongly recommended. At the last ODS and ISOM, we proposed extremely efficient DC-free RLL codes for a high density rewritable optical system (K.A.S. Immink et al, ODS '01, WC1, 2001, and ISOM '01, TH-J-29, pp. 152-153, 2001). Additionally, we have shown that the newly developed GS913 (guided scrambling 9 to 13), d=1 code can achieve a 4.5% higher overall rate compared with the (1,7)PP code. In this paper, we report the performance of this GS913 code for a high density rewritable disc system using a blue laser diode (405 nm), NA 0.85 and 0.1 mm thickness cover layer.