Practise the XYZ-Wing

An XY-Wing whose pivot holds all three digits, so targets must see all three cells.

8 real positions, each taken from an actual puzzle at the moment this was the cheapest move available. Two steps: find the cells that form the pattern, then find the candidate it rules out. A near miss tells you how many you had right, so getting it wrong is worth something.

Select the cells that form the pattern, then check. 1 / 8

5	3	4	79	27	29	8	1	6
7	2	8	6	3	1	5	9	4
6	1	9	8	5	4	7	2	3
8	6	7	1	4	5	2	3	9
3	5	1	2	9	7	4	6	8
4	9	2	3	8	6	1	5	7
2	7	6	49	1	89	3	48	5
1	4	35	57	6	38	9	78	2
9	8	35	457	27	23	6	47	1

How to spot it

Look for a trivalue cell with two bivalue neighbours whose candidates are both subsets of it, overlapping in exactly one digit. Then find cells seeing all three.

Full explanation on the XYZ-Wing reference page.

Practise something else

XY-Wing A pivot and two pincers. Whichever way the pivot falls, one pincer takes the digit.
Simple Colouring Follow one digit's forced chain through the grid in two alternating colours.

5	3	4	79	27	29	8	1	6
7	2	8	6	3	1	5	9	4
6	1	9	8	5	4	7	2	3
8	6	7	1	4	5	2	3	9
3	5	1	2	9	7	4	6	8
4	9	2	3	8	6	1	5	7
2	7	6	49	1	89	3	48	5
1	4	35	57	6	38	9	78	2
9	8	35	457	27	23	6	47	1

5	3	4	79	27	29	8	1	6
7	2	8	6	3	1	5	9	4
6	1	9	8	5	4	7	2	3
8	6	7	1	4	5	2	3	9
3	5	1	2	9	7	4	6	8
4	9	2	3	8	6	1	5	7
2	7	6	49	1	89	3	48	5
1	4	35	57	6	38	9	78	2
9	8	35	457	27	23	6	47	1

5	3	4	79	27	29	8	1	6
7	2	8	6	3	1	5	9	4
6	1	9	8	5	4	7	2	3
8	6	7	1	4	5	2	3	9
3	5	1	2	9	7	4	6	8
4	9	2	3	8	6	1	5	7
2	7	6	49	1	89	3	48	5
1	4	35	57	6	38	9	78	2
9	8	35	457	27	23	6	47	1