5...Bb4+

White's knight maneuver Nb1-d2-c4-e3.

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White's knight maneuver Nb1-d2-f1-e3.

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White's knight maneuver Nf3-h4-f5.

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Instead of a maneuvering game, White prepares the central pawn break d4.

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White gives up the pin on the f6-knight with the surprising move Bg3, intending Nc4 and targeting the e5-pawn.

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Black's knight maneuver ...Nb8-d7-c5 and possibly -e6.

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Black's knight maneuver ...Nb8-d7-f8-g6-f4.

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In order to avoid any exchanges on the d-file Black plays ...Qe7 and ...Bc7.

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Black puts the question to the bishop on g5 with the move ...h6.

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Instead of exchanging pawns on e4, Black maintains the tension with ...Be6 and ...0-0.

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