Chess notation cheat-sheet (for new readers)
Pieces: K king · Q queen · R rook · B bishop · N knight · (a pawn move has no letter)
Actions: x takes · + check · # mate · O-O short castles · O-O-O long castles · e8=Q pawn promotes to queen
Annotations: ! good move · !! brilliant · ? mistake · ?? blunder
What skewer chess puzzles ask you to find
When a puzzle hands you a rook, bishop, or queen pointing at an enemy line, run a two-part check before you fire. First, is the rear square genuinely undefended? Second, is the path between the two enemy pieces empty? Clear both and the back piece falls the moment the front one steps aside. Skip the check and you spend a tempo while a defender quietly covers the square behind.
The reason to bother: a skewer pays without a recapture. You hit one target and walk off with a second, so the material count tips your way in a single move. That is what you are hunting for in these positions, not an even trade. So when the slider serves a quiet-looking middlegame, scan every open file, rank, and diagonal for two enemy pieces stacked with the heavier one in front. That stack is the whole signal, and once you train it the win shows up before you calculate.
The which-is-in-front test
The trap in these puzzles is not finding two pieces on a line; it is reading them the right way. See an enemy rook and queen sharing a file and your eye wants to grab the first tactic it knows. Ask one question instead: which piece is in front? Bigger in front means a skewer is on and you strike now. Bigger behind means it is a pin, and the win comes from pressure, not a single hit.
Drill that question until it fires on sight, because the puzzle clock rewards the player who sorts the two stacks in a glance. A skewer is a one-shot strike that cashes in at once, since the front piece will not sit and let itself be lost. Misread it as a pin and you waste moves piling on a piece that is free to run. Train the question, not the geometry, and you stop second-guessing which way the material flows.
Hunt skewers in rook and queen endings
Filter your practice toward the endgame and the skewers come thick. With the board cleared, rooks and queens roam open lines and lose their cover, so a single checking move can line up the enemy king with a rook behind it and win the rook outright. The check forces the king off the line, and forced moves are the easiest tactics to calculate, which is why this case is worth drilling until it is automatic. Watch for an exposed king sharing a rank, file, or diagonal with a heavy piece.
The trainer pulls real positions from real games and filters them by engine, so the skewers you face actually decide the game. I keep the rating slider, which runs from about 400 to 2400, a step under your blitz number, which holds the work at fast recognition and lets the endgame patterns soak in. Three free hints back you up when a line hides: the first names the motif, the second points to the piece, the third gives the move.