four knights

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Four Knights Game: A position in which both black and white get out all of their knights into play. Famous variations:
1-Scotch Variation (d4 or P-Q4). Creates an open game where bishops can dominate.
2-Italian Variation (Bc4 or B-QB4). Puts pressure on black.
3-Spanish Variation (Bb5 or B-QN5). Puts pressure on knight.
In the end, it is an elegant opening. I recommend it.