developer_board App for Developer: Chess King
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More than 2500 exercises for mating in 3 or 4 moves!...

Mega endgame course with more than 600 lessons and...

Mate in 1 (Chess Puzzles) Mod
2500 chess exercises to train mate in 1 move. Easy?...

Chess Strategy (1800-2400) Mod
Many instructive lessons on important strategic themes...