Convert a numerical overload against a settled block. Move the ball quickly from side to side to make the block travel, create two against one in central areas, and shoot as the space appears rather than waiting for perfect.
In the attacking half, the team in possession has an extra player (in a real power play this is the goalkeeper pushed forward, with the net empty). The defending block stays compact. Circulate quickly, switch the point of attack to make the block shift, look for a two against one centrally, and strike as soon as a lane opens. Rotate the wide pairs. Coach the risk too: lose it here and it is an empty goal.
Ball speed breaks a block, not the extra man. A settled defence absorbs a numerical overload perfectly comfortably as long as the ball travels at a pace defenders can travel with, and an attacking side passing calmly around the outside of a block with an extra player is doing exactly nothing while feeling productive. The overload only matters because it makes the quick pass available; it is not itself the weapon.
So the instruction is to move the ball from side to side fast enough to make the block travel. Defenders shifting across are defenders who are momentarily out of position, and the gap appears in the half second after they arrive rather than while they are set.
Playing too close to the block is the specific error, and it is common because proximity feels like progress. A pass played into a defender's reach is an interception, and in futsal an interception against an attacking overload is usually a two against one going the other way. Stay far enough out that the ball can be moved without being reached.
Creating two against one centrally is the mechanism that actually produces the chance. Wide overloads look tidy and rarely produce anything; the centre is where a defender committing leaves a shooting lane.
Shoot as the space appears rather than waiting for a better version of it. Against a compact block the best chance on offer is usually the first one, and a side that circulates hoping for certainty will circulate until the block wins.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.