C97 Ruy Lopez: Closed, Chigorin Defense
C97 holds three named lines, all under the name Ruy Lopez. It leaves C92 (Ruy Lopez: Closed) with 9...Na5. Its deepest line, Ruy Lopez: Closed, Chigorin, Yugoslav System, runs to 14...g6, the third-longest of all 500 codes. Both kings have castled by the end of the reference line, White on move 5 and Black on move 8.
| # | White | Black |
|---|---|---|
| 1 | e4 | e5 |
| 2 | Nf3 | Nc6 |
| 3 | Bb5 | a6 |
| 4 | Ba4 | Nf6 |
| 5 | O-O | Be7 |
| 6 | Re1 | b5 |
| 7 | Bb3 | d6 |
| 8 | c3 | O-O |
| 9 | h3 | Na5 |
The move that completes C97
The reference line of C96 plays all of these moves and continues beyond them; C97 is the position reached at 9...Na5.
- 9...Na5 The knight goes from c6 to a5, attacking the bishop on b3.
Lines filed under C97
All three share their first 18 plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Ruy Lopez: Closed, Chigorin Defense | (the shared start itself) | 18 | both castled |
| Ruy Lopez: Closed, Chigorin Defense | 10.Bc2 c5 11.d4 Qc7 | 22 | both castled |
| Ruy Lopez: Closed, Chigorin, Yugoslav System | 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Bd7 13.Nf1 Rfe8 14.Ne3 g6 | 28 | both castled |
Ruy Lopez: Closed, Chigorin Defense
- 10.Bc2 The bishop goes from b3 to c2.
- 10...c5 The c-pawn advances two squares to c5, covering b4 and d4, opening a line for the queen on d8.
- 11.d4 The d-pawn advances two squares to d4, covering c5 and e5, opening a line for the bishop on c1 and the queen on d1.
- 11...Qc7 The queen goes from d8 to c7, opening a line for the rook on f8.
Ruy Lopez: Closed, Chigorin, Yugoslav System
- 10.Bc2 The bishop goes from b3 to c2.
- 10...c5 The c-pawn advances two squares to c5, covering b4 and d4, opening a line for the queen on d8.
- 11.d4 The d-pawn advances two squares to d4, covering c5 and e5, opening a line for the bishop on c1 and the queen on d1.
- 11...Qc7 The queen goes from d8 to c7, opening a line for the rook on f8.
- 12.Nbd2 The knight leaves b1 for d2, opening a line for the rook on a1.
The road to C97
The position after 9...Na5
White has brought out the knight on f3 and bishop on b3; Black the knight on a5, knight on f6 and bishop on e7. White could capture with Bxf7+, Nxe5. White is to move and has 28 legal moves.
Codes that branch off from C97
The reference lines of three other codes leave C97 from two of its named positions; “From” gives the last part of that position’s name.
| Code | From | Moves | Reference line |
|---|---|---|---|
| C96 | Chigorin Defense | 10.Bc2 | Ruy Lopez: Closed, Chigorin Defense |
| C98 | Chigorin Defense | 12.Nbd2 Nc6 | Ruy Lopez: Closed, Chigorin Defense |
| C99 | Chigorin Defense | 12.Nbd2 cxd4 13.cxd4 | Ruy Lopez: Closed, Chigorin Defense, Panov System |
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| C94 | Ruy Lopez: Closed, Breyer Defense | two squares: a5, b8 |
| C90 | Ruy Lopez: Closed | four squares: h2, h3, a5, c6 |
| C93 | Ruy Lopez: Closed, Smyslov Defense | four squares: a5, c6, h6, h7 |
| C95 | Ruy Lopez: Closed, Breyer | four squares: d2, d4, a5, b8 |
| C89 | Ruy Lopez: Marshall Attack | six squares: h2, h3, a5, d5, c6, d6 |
| C91 | Ruy Lopez: Closed, Yates Variation | six squares: d2, h2, h3, d4, a5, c6 |
| C88 | Ruy Lopez: Closed | 12 squares: c2, h2, c3, h3, a5, c6, d6, d7 … |
Where lines continue from here
Nine named lines filed under other codes pass through the position after 9...Na5. All of them belong to the codes listed above.