Double on 9/10/11 or 10/11 only Under the "Reno rule", doubling down is only permitted on hard totals of 9, 10, or 11 (under a similar European rule, only 10 or 11). The basic strategy would otherwise call for some doubling down with hard 9 and soft 13–18, and advanced players can identify situations where doubling on soft 19–20 and hard 8, 7, and even 6 is advantageous. The Reno rule prevents the player from taking advantage of double-down in these situations and thereby increases the player's expected loss. The Reno rule increases the house edge by around 0.1%, and its European version by around 0.2%.
double on 9/10/11 or 10/11 only under the "reno rule" doubling down is only permitted on hard totals of 9 10 or 11 (under a similar european rule only 10 or 11) the basic strategy would otherwise call for some doubling down with hard 9 and soft 13–18 and advanced players can identify situations where doubling on soft 19–20 and hard 8 7 and even 6 is advantageous the reno rule prevents the player from taking advantage of double-down in these situations and thereby increases the player's expected loss the reno rule increases the house edge by around 01% and its european version by around 02%