5.e5! in the Italian Game: Erigaisi, Sveshnikov, and the Data Gap

On move five, White pushes the pawn from e4 to e5. No capture, no trade, no piece touching another piece. A single advance, placing the pawn directly in front of the black knight standing on f6, turning an ordinary exchange of pieces into a question Black must answer at the board, not in the analysis room.

The game between Erigaisi and Laohawirapap was selected as Game of the Week number 740 in a series formatted as "60 Minutes". The move 5.e5! appears there in a role quite different from a theoretical shock. It is presented as a way of playing that others have already played, that others already teach, and that is waiting for more students.

That is why this game deserves discussion. Not because it is beautiful. But because it is presented as a product that has passed inspection, while the inspection sheet is blank.

The full opening sequence is 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.e5!. This is the modern branch of the Italian Game, and the same position can be reached from the Scotch Gambit via 3.d4 exd4 4.Bc4 and only then Nf6 and e5. This kind of transposition makes the branch appear in two different curricula under two different names, and the coaching world calls that a double dividend: one block of memorised lines serving two opening systems.

Historically, this branch was used frequently by Evgeny Sveshnikov and several other grandmasters. The instructional material built on the Erigaisi–Laohawirapap game asserts that the branch delivered very good results for the grandmasters who used it, and simultaneously calls it a perfect choice for club players because it is relatively easy to learn and full of traps.

Those three claims sit side by side in the same paragraph. But they are not the same kind of claim. One is an assessment of results, one is an assessment of difficulty, one is a risk warning. And in the source material there is no database table, no ACPL figure, no win rate, no frequency of use above 2700, no tournament name, no game result, no Elo rating for either player.

When I cross-checked open sources on the modern Italian line across recent seasons, the first thing I wrote in my notebook was the number of blank fields, not the number of moves.

The mechanism of 5.e5! is easy to describe. After Black takes the pawn on d4, the central tension disappears. White no longer has a d4 pawn to defend or trade. Instead of recapturing, White pushes the pawn to e5, attacks the f6 knight, seizes central space and forces Black to define the character of the position with a passive move.

Black has three main replies, all three covered in the material: 5...d5, 5...Ng4 and 5...Ne4.

5...d5 is the most principled move, striking directly at White's pawn structure. The position then opens up and tactical motifs tied to files and diagonals begin to appear.

5...Ng4 pushes the attacked knight forward instead of back. The knight leaves f6, meaning it is no longer a target, but also meaning it abandons the most important defensive square. This is the kind of move club players tend to choose at the board, because it looks active, and it usually ends in a position far more unpleasant than the initial feeling suggested.

5...Ne4 is the most provocative: the knight steps into the centre, accepting that it stands in front of White's pawn, in exchange for control of key squares. This is the branch students underestimate most, because the move looks comfortable.

For a student, the order of study should run opposite to the order of presentation. 5...d5 is the branch to understand first, because it is the most sound defensive move and the one strong opponents will choose. 5...Ng4 and 5...Ne4 are branches to memorise, but they belong to the category of traps aimed at the unprepared, and a prepared opponent will not walk into them.

The tactical essence of the whole system lies in the fact that the e5 pawn is a long-term target. It can be surrounded, traded, or turned into a pretext for White to open diagonals and files. Black usually does not lose a piece on move eight. Black loses the game on move twenty, when the position still looks balanced but no move is a real move anymore.

That is why I read the three claims in the source differently. Easy to learn and full of traps are contradictory propositions if applied to both sides. But if applied to only one side, they are entirely consistent. The branch is easy for White, because White only needs to remember one set of attacking moves, most of which lead to an active position. And it is trap-laden for Black, because Black must remember three defensive branches, each splitting into further variations, some of which look reasonable but are wrong.

The real value of 5.e5! lies not in an objective advantage but in the asymmetry of the memory burden: White learns one road, Black learns three, and the trap only works in one direction.

Historically, this explains why a branch that is not necessarily superior has survived so long. Sveshnikov and other grandmasters used it for years, and what they were buying was not an engine evaluation but an asymmetry in preparation time.

There is one more detail the source does not state but the reader should ask about: this game is used as a teaching example, not as a clash between two players of equal strength. If Erigaisi had White and was rated far higher, then winning with a sharp branch proves little about the strength of that branch. It proves what everyone already knows: the stronger player usually wins. To know how solid this branch really is, you must see how it performs between two players of the same level, at a classical time control, when both have prepared.

A teaching game always has pedagogical value. It does not automatically have rating value.

The time control is also unspecified in the source, and that is a significant omission. A trap-heavy branch has its highest value in rapid and blitz, where the opponent has no time to recalculate from scratch. At classical time controls, the same branch can be neutralised by a single hour of pre-game analysis.

The clearest counterargument is that the claim of "very good results" has no denominator. An opening branch cannot be evaluated with adjectives. It needs a win rate, a usage frequency, opponents, time controls and playing conditions.

And even with sufficient data, correlation is not causation. If a group of grandmasters used 5.e5! and won a lot, they may well have won because they were that group of grandmasters, not because of that fifth move. This is the most basic reasoning error in opening analysis, and it repeats every season.

Data never lies, but it likes to test our patience — especially when someone insists the data has already finished answering.

The second point: the real risk of a trap-heavy branch is not borne by Black. It is borne by the White player who memorised without learning the reason. When the opponent plays a move outside the memorised set, that player loses both the plan and the trap, because the trap never belonged to him. It belonged to the position.

The third and hardest point to verify: the label "perfect for club players" is not a purely technical conclusion. It is a distribution message. A branch described as easy to learn, full of traps and suited to the masses is a branch that sells courses, sells opening books and keeps readers returning to a weekly series. That does not make it wrong. It only means it should be read as a commercial statement with technical content attached, not as a research result.

I bet on numbers before the world knows how to read them. But I do not bet on numbers nobody has published.

The signal to watch is very specific. If over the next six months 5.e5! appears in multiple games at the 2700 level, the branch is returning to the mainstream, and Black will soon have a dedicated antidote — at which point its value shifts from advantage to surprise. If it appears only sporadically and mostly in fast games, it remains a weapon for coaches and club players, exactly as it was introduced.

The game between Erigaisi and Laohawirapap will be remembered as a lecture, not a landmark. What is worth waiting for is not how strong that fifth move is, but whether anyone has the patience to publish the dataset behind it. In a game with no database attached, data is the only spectator left — and that spectator is still silent.