How to guess a map

Take the deck of cards and let it shuffle to the audience. Next, take a deck from them and arrange 25 cards in 5 rows of 5 cards in each row. Cards must be in clear form. Ask any viewer to remember the map and say in which row this card lies. You must remember the first card on the left side in this row. Then collect the cards in vertical rows. Start collecting from the last card of the last row. Put this card face down on the last card of the next row, then put these two cards on the last card in the previous row and so on. After you collect all the cards, again arrange them as before. Now the cards that were the first in each row were in the first vertical row. Then again, check with the viewer, in which row is his card. When the viewer says, you need to find in the first row the first card of the series with the previous distribution of cards, which you remember. The required map will appear directly above it in the corresponding vertical row. This trick can be done with several viewers, in which case you need to remember the first cards of the series.

This table explains the process of focus

Location of maps at the beginning of focus

Location of maps at the end of focus