Much of the instructive time has been focused on learning to checkmate with rooks, but I also spent a day teaching students about ranks, files, and diagonals, as recommended by Momir Radovic (see "How to Teach Chess in the Modern Age").
Last week, students were shown these two positions from some online games.
Black to move
Although there are pawns on the board, beginners need to learn to use king and rook together to force checkmate. Here, checks by the rook only needlessly prolong the game. Rather, 74...Kg3 maintains control of the second rank and forces 75.Kg1. Now, the rook check is checkmate.The second position starts with a checkmate in one, then we backed the game up a move to learn about Black's fatal error.
Black to move
28...Qxc2??White checkmated Black with 29.Rh8#
Black had been winning before the blunder. We spent some time looking at possibilities.
28...Qe3+ 29.Kh1
Here, again, a check is tempting, as it seems that White has a weak back rank. Indeed, after 29...Qe1+ 30.Rxe1 Rxe1+ 31.Nxe1, Black has a mate on the move.
Black to move
However, 31.Ng1 blocks the check, revealing that 29...Qe1 would have been a terrible mistake, playing hope chess.Instead, Black stops White's major threat with 29...Qxh6, although White maintains a material advantage.
I did not use this next position last week, because it was played yesterday. It represents the critical idea in elementary checkmates of cutting off. Young players have difficulty learning this idea because youth likes a direct attack. Once they get it, however, chess skill begins to grow.
Black to move
Black played 46...Rfc2, threatening checkmate in one. White can only delay with spite checks.47.a4 allows bxa4#
47...Rab2# is the principal threat.
White played 47.Rb6, but could have thrown away both rooks to last three additional moves.
Yes, it is very important to introduce all the elementary piece contacts as early in the learning process as possible. Direct attack first, then the others. "Cutting off" is one of them as your piece, by use of its striking power, is restricting the enemy piece of movement.
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