@jeffreyq2 {in alphanumeric notation} 2. .. c3:a5 3. e5-f6 e7-d6 (forced, otherwise it is lost due to material deficiency or huge positional disadvantage: normally, in Russian puzzles that option…

@dg https://i.imgur.com/9pZepRC.png 1.a3-b4 c3:a5 best move 2.e5-f6 e7-d6 3.d4-e5 a5-b4 4.e3-d4 c5:e3 5.f4:d2 d6:f4 6.a7:a3 f4-g3 7.f6-e7 h6:f4 8.b2-c3 And the position of the whites is won …

d4

In English opening white can meet QID with Sämish setup. Because black placed bishop on b7, white can't develop kingside knight naturally with Nf3, and one of options would be to play f3, and at good…