1.Nf3...While 1. e4 and 1. d4 and by far more common starting moves, 1. Nf3 implies that white doesn't want to go into a deep theoretical battle. Generally 1. Nf3 players will either play d4 or fianchetto on the kingside next.1....b6Unusual response to unusual move! 1...b6 preparing to fianchetto the bishop and not committing to the center yet. Knowing I0euros' repertoire, b6 might not be a suprise to Karagialis.2.g3Bb73.Bg2e64.O-O...Both players have been following the natural play book so far, but then...4....f5!?...this move is played. According to database, this has been played before especially by dennistheviking. While it's weakening the king and f7-square, it's also grabbing space in the center.4...Nf6Nf6 followed with Be7 and 0-0 would have been a slower approach. By playing f5 black hints that they are not afraid of sharp positions5.d4Be75.d4Nf66.a4!?...White wants to force trades without weakening their king. Database says that this wasn't the first time Karagialis played 6. a4 in this exact position: a month ago he played this game against dennistheviking, Karagialis - dennistheviking 0-1, https://lichess.org/DnuRwxRz.6....Be7Ignoring white's last move. Be7 is logical: making luft for the king and allowing castling in near future.7.a5bxa58.Rxa5...White gets the pawn in hand that he wanted.8....@g49.@h6...In the fianchetto setup it's very typical to sacrifice the knight on f3 for safe structure: gxf3 exf3 and white's king is behind the wall.9.@f7+Kxf7(9...Kf8)10.Ne5+Kf811.Bxb79....Rg8Very common move to react to @h6 drops.10.Nc3...Developing and still offering the sacrifice on f3.10.Rxf5There is also a cool combination in this position picking up a pawn to drop on f7, so Ne5+ comes with a discovered attack on the bishop on b7.exf5(10...gxf3Black's best defence is in fact not to take the rook but to take the knight on f3 and the white rook recaptures. The bishop can take the rook, but the white bishop recaptures and black has no diagonals to defend his light square weaknesses.11.Rxf3Bxf312.Bxf3)11.@f7+Kf8(11...Kxf712.Ne5+Kf813.Bxb7d6)12.fxg8=Q+Kxg810....gxf311.exf3gxh612.Bxh6N@f7Driving away the bishop from black's camp and plugging the f7-weakness. Perhaps black could have been more aggressive with p@g4 drop, since the light squares are the key to break white's defence.12...@g413.@e2N@h3+On the other hand, attacking too much (like 13...N@h3+) isn't good as white's counterplay comes quick, especially with the knight in hand.14.Bxh3gxh315.@f7+Kxf716.N@e5+Ke817.Rxa713.Bf4Nh5Driving the bishop away more14.Be3...If 14...f4 didn't drop a knight on h5, it would have been a good move. Trying to open g-file for possible @h3 drops.14....f4??Better was @f4!15.Rxh5fxe316.fxe3B@g6Attacking the rook and covering h7.17.Rb5...Rook moves to b5 with tempo.17....Qc8Queen covers the bishop, other options weren't that good:17...Ba6Moving the bishop away would allow @b7 with promotion threats.18.@b717...Nd6This move would both cover b7 and attack the rook, but it would allow N@h6 complications.18.N@h6Rg7(18...Rf819.@g7)19.Rxb7Nxb720.B@h818.@e5...Since the queen is not defending f6 anymore, white decides to attack on dark squares.18....Ba6Black wants to chase the rook away now since b7 is covered. However white has other plans in mind...19.@f6!...Drop on f6, ignoring the fact that the rook is hanging! White smells blood.19....Bf820.@e7Bxe721.fxe7Kxe7This feels very risky as the king is exposed now, although white doesn't have that much material in hand to attack with.21...@g7The other option could have been to cover f6 from knight fork. However, it's clear that white is in total control here: they have the initiative and black has no counterplay.22.d522.B@f6+Kf823.Qa1...Interesting idea to bring the queen into the attack.23.N@e7There was a fork on e7, but white has to be careful not to run out of material and let black solidate.Qe8(23...Bxb524.Nxc8Saccing the queen is very dangerous, moving the queen looks forced.)24.Nxg8Kxg825.R@g7+Kf826.d5Opening up the position for more trades.N@f527.dxe6Nxg728.Bxg7+Kxg729.exf7Qxf730.@f6+Kf831.N@h623....Bxb5Black takes the material.24.Qa3+...Annoying check, d6 is the only square to block it.24....@d625.exd6Nxd626.Nxb5@e7White's threatening Qxd6+ followed with mate, @e7 stops it.26...a627.Qxd6+cxd628.B@e7+Kf729.Nxd6#27.B@h6+Kf727...@g728.Bfxg7+Rxg729.Nxd6cxd630.@f6exf631.Qxd6+@e732.Bxg7+Kxg733.Qxe7+27...Ke828.N@g7+Kf729.Nxd6+cxd630.N@g5+Kxf631.@e5+dxe532.dxe5+Kxe528.Nxd6+cxd629.N@g5+Ke829...Kxf630.N@g4+Kf531.e4#30.N@g7+Kd830...Rxg731.Bhxg7R@g831.Qxd6...Taking advantage of the pin, threatening both Bxe7# and N7xe6#.31....N@c631...Qxc2Moving the queen and making luft would have been a way to delay the mate. This move also has its own threats with @f2+.32.@b7(32.N7xe6+Kc833.@b7+Kxb734.Nc5+Qxc535.Qxc5)@f2+33.Rxf2Qxf2+34.Kxf2N@d3+35.Ke2R@c2+36.Q@d2R@e1#32.N5xe6#1-0 White wins by checkmate.Strong performance by Karagialis. a2-a4-a5 push to force a trade of pawns and then kingside attack on dark squares left black defenceless.1-0