Queen's Pawn Game: Colle System (D05)

480 puzzles

d4 d5 Nf3 Nf6 e3 e6

233 puzzles for White · avg difficulty 1.5

247 puzzles for Black · avg difficulty 1.6

Mistake	Side	Count	Avg loss
6...Qe2	Black	19	3.7 pawns
6...e4	Black	15	6.8 pawns
7...e4	Black	12	6.4 pawns
9.Nxe5	White	12	5.8 pawns
6.c4	White	12	2.2 pawns

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