is it illegal to count cards in casinos
Card counting Card counting is not illegal under British law, nor is it under federal, state, or local laws in the United States provided that no external card counting device or person assists the player in counting cards. Still, casinos object to the practice, and try to prevent it,[23] banning players believed to be counters. In their pursuit to identify card counters, casinos sometimes misidentify and ban players suspected of counting cards even if they do not.[24]
Sequence (game) To form rows, poker chips may be placed vertically, horizontally or diagonally. Each complete row of five (or four and a free corner space) is counted as a sequence. Sequences of the same color may intersect, but only at a single position.