Jon Halfdanarson's chess openings
🇮🇸 IcelandFIDE 211660 games
Jon Halfdanarson, from Iceland, has 60 tournament games in the ChessPrep database. As White, Jon Halfdanarson most often opens with 1.d4 (64% of games). As Black, against 1.e4 the usual reply is 1...e6, the French Defense; against 1.d4 it is 1...d5.
As White28 games · +5 =9 −14 · 34%
As Black32 games · +10 =9 −13 · 45%
As White
- 1.d4 Queen's Pawn Opening64%18 games · scores 39% · main line 1.d4 Nf6 2.c4 g6 3.Nc3 d5
- 1.e4 King's Pawn Opening36%10 games · scores 25% · main line 1.e4 g6 2.d4 Bg7 3.Nc3 d6
As Black against 1.e4
- 1...e6 French Defense69%9 games · scores 61% · main line 1.e4 e6 2.d4 d5 3.Nc3 Bb4
- 1...e5 Open Game15%2 games · scores 50% · main line 1.e4 e5 2.Bc4 Bc5 3.d3 d6
- 1...c5 Sicilian Defense15%2 games · scores 50% · main line 1.e4 c5 2.Nc3 Nc6 3.g3 g6
As Black against 1.d4
- 1...d5 Closed Game82%9 games · scores 33% · main line 1.d4 d5 2.c4 e6 3.Nc3 Nf6
- 1...c5 Old Benoni Defense9%1 game · scores 100% · main line 1.d4 c5 2.d5 Nf6 3.c4 d6
- 1...Nf6 Indian Defense9%1 game · scores 0% · main line 1.d4 Nf6 2.c4 d6 3.Nc3 e5
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