411 REFERENCE · Wikibooks
Chess/Puzzles/Directmates/Three-move 7/Solution
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1.Nd5! Kxd5
1... d3 leads to 2.Rh4+ Kxd5 3.b4#
2.Rh4! d3
2... e4 leads to 3.Rh5#
3.b4#
8 bl 7 nl 6 5 pl kd pd 4 pl rl 3 pd 2 bl pl 1 kl 40