Budapest TCh 2012-13 Div III Rd7

Here is a game from board 1 played by the Rakosligeti second team in Divsion III. We won the match by a big score,

RAC II – Sárkány DSE IV 11,5:0,5

Horváth,Csaba (1861) - Bán,Dániel Péter (2093)

Sicilian Dragon Yugoslav 9.Bc4 Bd7 10.0-0-0 Rb8 [B78]

Bp Csb 2012/13 III Szén Budapest (7.1), 03.02.2013

Position 1
The position is sharp and white has just made the normal king shuffle with 23.Kb1. What do you suggest for black?

Black to Play

23.Kb1