Day 431: Discovered check
Target rating: 1160
Lesson of the day
With a discovered check the moving piece unmasks a check from the piece standing behind it. While the king deals with the check, the piece that moved grabs whatever it likes, free of charge. Look for your long-range piece on a line with the enemy king, with exactly one of your own pieces in between. The rule: among all the ways to step aside, pick the one that captures or attacks the most expensive loot.
Warm-up
1. Attack on the uncastled king: knight to d7 (c5·16)Analysis
White to move — find the best continuation
2. Winning blow: knight to d6 (f5·6)Analysis
White to move — find the best continuation
3. Attack on the uncastled king: rook to e8 (e4·2)Analysis
White to move — find the best continuation
4. Winning blow: knight to e6 (c7·2)Analysis
White to move — find the best continuation
5. Attack on the uncastled king: queen to e7 (e4·5)Analysis
White to move — find the best continuation
6. Winning blow: queen to f7 (e8)Analysis
White to move — find the best continuation
7. Winning blow: bishop to g2 (e4)Analysis
White to move — find the best continuation
8. Winning blow: pawn to c7 (b6·3)Analysis
White to move — find the best continuation
9. Winning blow: king to f3 (g3)Analysis
White to move — find the best continuation
10. Winning blow: knight to c5 (a4·2)Analysis
White to move — find the best continuation
Core set
11. Winning blow: pawn to b6 (a5·8)Analysis
White to move — find the best continuation
12. Winning blow: pawn to f5 (g4·11)Analysis
White to move — find the best continuation
13. Winning blow: knight to b6 (a8·2)Analysis
White to move — find the best continuation
14. Winning blow: queen to e4 (c4)Analysis
White to move — find the best continuation
15. Winning blow: bishop to b4 (e1·3)Analysis
White to move — find the best continuation
16. Winning blow: pawn to e7 (d6·9)Analysis
White to move — find the best continuation
17. Winning blow: knight to d6 (b5·11)Analysis
White to move — find the best continuation
18. Winning blow: rook to e7 (e1·10)Analysis
White to move — find the best continuation
19. Winning blow: knight to c4 (e3·4)Analysis
White to move — find the best continuation
20. Winning blow: bishop to c2 (a4·3)Analysis
White to move — find the best continuation
21. Winning blow: bishop to g3 (d6)Analysis
White to move — find the best continuation
22. Attack on the uncastled king: bishop to b2 (c1·7)Analysis
White to move — find the best continuation
23. Attack on the uncastled king: bishop to e4 (b1·23)Analysis
White to move — find the best continuation
24. Attack on the uncastled king: queen to b4 (b1·7)Analysis
White to move — find the best continuation
25. Attack on the uncastled king: rook to e7 (e6)Analysis
White to move — find the best continuation
Challenge
Review
Day complete — every puzzle solved. See you tomorrow!
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