Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. Ng5/4...d5/5. exd5/5...b5/6. Bf1

= Ulvestad Variation = 6 Bf1! A strange looking move, undeveloping the Bishop, however White wisely retreats the Bishop as tactics advantage still remain on b5.

Theory table

 * 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5 6.Bf1

Estimated next move likelihood
h6 40%, Nd4 40%, Qxd5 15%, Nxd5 4%