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Day 681: Discovered mate

Lesson of the day

In a discovered mate the piece that moves is not the one that mates — the long-range piece behind it delivers the blow. The moving piece is completely free: it can land anywhere, ideally stealing the king's last squares or guarding key points. Look for your rook, bishop or queen lined up with the enemy king, with exactly one of your own pieces in between. When choosing the unveiling move, remember its second job — shutting the king's escape door.

Warm-up

1. Winning blow: queen to h8 (e5·2)Shuffle Rating 1280Analysis
White to move — find the best continuation
2. Winning blow: rook to g2 (f2·3)Shuffle Rating 1280Analysis
White to move — find the best continuation
3. Winning blow: bishop to b7 (f3·5)Shuffle Rating 1280Analysis
White to move — find the best continuation
4. Mate in 2: bishop to a7 (g1·2)Shuffle Rating 1320Analysis
White to move — find the best continuation
5. Winning blow: queen to e7 (d7)Shuffle Rating 1280Analysis
White to move — find the best continuation
6. Winning blow: knight to e5 (d3·16)Shuffle Rating 1280Analysis
White to move — find the best continuation
7. Mate in 2: queen to f6 (b2·5)Shuffle Rating 1320Analysis
White to move — find the best continuation
8. Winning blow: queen to e1 (f1·2)Shuffle Rating 1280Analysis
White to move — find the best continuation
9. Winning blow: rook to f8 (f1·14)Shuffle Rating 1280Analysis
White to move — find the best continuation
10. Attack on the uncastled king: bishop to h7 (c2·3)Shuffle Rating 1320Analysis
White to move — find the best continuation

Core set

11. Mate in 3: queen to d4 (a1·2)Shuffle Rating 1630Analysis
White to move — find the best continuation
12. Mate in 3: rook to a5 (a1)Shuffle Rating 1630Analysis
White to move — find the best continuation
13. Mate in 3: knight to d8 (e6)Shuffle Rating 1630Analysis
White to move — find the best continuation
14. Mate in 3: knight to h6 (g4·3)Shuffle Rating 1630Analysis
White to move — find the best continuation
15. Winning blow: queen to h7 (b1·2)Shuffle Rating 1650Analysis
White to move — find the best continuation
16. Winning blow: knight to g6 (f4·11)Shuffle Rating 1560Analysis
White to move — find the best continuation
17. Attack on the uncastled king: bishop to f4 (g5·3)Shuffle Rating 1560Analysis
White to move — find the best continuation
18. Winning blow: rook to d4 (d1·11)Shuffle Rating 1560Analysis
White to move — find the best continuation
19. Winning blow: rook to h7 (h8·6)Shuffle Rating 1560Analysis
White to move — find the best continuation
20. Winning blow: knight to f5 (d4·8)Shuffle Rating 1560Analysis
White to move — find the best continuation
21. Winning blow: knight to c4 (e5·3)Shuffle Rating 1560Analysis
White to move — find the best continuation
22. Winning blow: knight to d6 (b5·18)Shuffle Rating 1560Analysis
White to move — find the best continuation
23. Winning blow: rook to f8 (f1·17)Shuffle Rating 1560Analysis
White to move — find the best continuation
24. Winning blow: queen to b4 (f4·4)Shuffle Rating 1560Analysis
White to move — find the best continuation
25. Winning blow: queen to a6 (a5·4)Shuffle Rating 1560Analysis
White to move — find the best continuation

Challenge

26. Attack on the uncastled king: knight to f7 (e5·26)Shuffle Rating 1630Analysis
White to move — find the best continuation
27. Winning blow: queen to b5 (c4·3)Shuffle Rating 1750Analysis
White to move — find the best continuation
28. Attack on the uncastled king: knight to c6 (d4·25)Shuffle Rating 1790Analysis
White to move — find the best continuation

Review

29. Winning blow: knight to f6 (h5·17)Shuffle Rating 1420Analysis
White to move — find the best continuation
30. Winning blow: knight to f2 (d3·4)Shuffle Rating 1390Analysis
White to move — find the best continuation

Day complete — every puzzle solved. See you tomorrow!

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