Whe the puck goes to P2, K2 applies pressure and eliminates the pass to P1 by taking an inside to outside path. When P2 passes puck to P3, K3 anticipates this pass and pressures P3 as fast as possible. If P3 makes the pass to P4, then K4 pressures P4. When K4 pressures P4, K1 fills in the low slot vacated by K4 until K4 returns.