For a similar situation, where White compels Black to place White in Stalemate, see the short 'A Stephen Witherington Draw With A Difference' from four weeks ago.
It may be of interest to viewers to learn that Stalemate rules in England used to be quite different. Where a player was placed in Stalemate, he was pronounced the winner! Unlike on the Continent, where a draw, as now, was the order of things. However, in 1813, Jacob Henry Sarratt, Professor of Chess in London, moved that matters ought to be brought into alignment with the rest of Europe. He had his way, & for the last 211 years it has remained so & will always be so. Therefore, looking at the study here, at the end White has a choice to land Black in Stalemate or compel Black to hand him a Stalemate, & so turning, under old rules, a loss into a win (the only way to do it, back then, to avoid a disaster). An interesting & curious historical point.
Although you are right when you say that the Black King can't move, note that for Checkmate to be executed, the Black King MUST BE IN CHECK. This is the reality of Stalemate, in that where the King is not in check (the position at around 2.06), but can't move, the game is at a deadlock & drawn. You will not find the Rook giving check (after 1.Rb6+ Ka8; 2.Rb2 & no check, simply no move legally remaining for Black). I trust this fully clarifies the position. Keep watching for more.
For a similar situation, where White compels Black to place White in Stalemate, see the short 'A Stephen Witherington Draw With A Difference' from four weeks ago.
It may be of interest to viewers to learn that Stalemate rules in England used to be quite different. Where a player was placed in Stalemate, he was pronounced the winner! Unlike on the Continent, where a draw, as now, was the order of things. However, in 1813, Jacob Henry Sarratt, Professor of Chess in London, moved that matters ought to be brought into alignment with the rest of Europe. He had his way, & for the last 211 years it has remained so & will always be so. Therefore, looking at the study here, at the end White has a choice to land Black in Stalemate or compel Black to hand him a Stalemate, & so turning, under old rules, a loss into a win (the only way to do it, back then, to avoid a disaster). An interesting & curious historical point.
2:06 Isn't this checkmate? Black king can't move.
Although you are right when you say that the Black King can't move, note that for Checkmate to be executed, the Black King MUST BE IN CHECK. This is the reality of Stalemate, in that where the King is not in check (the position at around 2.06), but can't move, the game is at a deadlock & drawn. You will not find the Rook giving check (after 1.Rb6+ Ka8; 2.Rb2 & no check, simply no move legally remaining for Black). I trust this fully clarifies the position. Keep watching for more.