Every Chess Move Classifications Explained (Blunder to Brilliant)

Main ideas & lessons

• A chess engine effectively “grades” every move you play—similar to a teacher marking a test—so it’s more informative than only using win/loss or your final rating.

• The video explains an 8-tier classification system for moves, ordered from best to worst:

  1. Best move
  2. Brilliant move
  3. Good move
  4. Inaccuracy
  5. Mistake
  6. Blunder
  7. Missed win
  8. Only move

• A core theme is that improvement usually comes less from finding dazzling tactics and more from reducing errors, especially blunders.

• These move grades shape how games “feel” at different skill levels:
  • Beginners: more blunders
  • Masters: more best moves
• Rating growth is framed as moving up the “ladder” by turning worse move categories into better ones.

The 8 move classifications (detailed)

1) Best move

• The single strongest move among all legal options in that position.
• The engine marks it as objectively best out of sometimes 30–40 legal choices.
• Most players rarely find it; they more often find “decent” moves.
• The performance gap (e.g., 400-rated vs grandmaster) is largely about how often players find these best moves.

2) Brilliant move

• A move that seems wrong at first glance—often involving:
  • sacrificing a queen or material
  • giving up something “obviously” undesirable
• The hidden reason is revealed through:
  • a hidden attack
  • a forced sequence
  • checkmate ideas not seen initially
• Key trait: requires seeing beyond obvious appearances.
• Considered rare because it depends on unusual, deep calculation.

3) Good move

• Strong, solid play, but not necessarily the objectively best.
• Often:
  • improves position
  • creates threats
  • solves problems efficiently
• Frequently quiet and unflashy, such as:
  • a knight retreat
  • a king move
  • a defensive move that others don’t notice
• Emphasis: the strongest chess is sometimes simply placing a piece on the perfect square.

4) Inaccuracy

• A move that is “normal” and feels fine, but the engine finds a slightly better option.
• Typical consequences:
  • small loss of advantage
  • missing a stronger plan
• The impact is usually gradual:
  • one inaccuracy might not lose the game
  • multiple inaccuracies (e.g., “10”) can be decisive
• Often where intermediates stall: they don’t blunder dramatically; they drift to worse positions.

5) Mistake

• A move that causes a significant drop in evaluation.
• Possible outcomes:
  • you were better and squandered your advantage
  • you were equal and now become worse
• Often not about immediate material loss; more about positional degradation, such as:
  • developing a knight to the wrong square
  • trapping a bishop behind pawns
  • keeping a rook out of the game
• Strong players punish these gradually—slow pressure can be worse than losing a piece outright.

6) Blunder

• A catastrophic one-move error that changes everything.
• Examples given:
  • hanging a queen
  • missing a tactic
  • allowing checkmate
  • throwing away a winning position
• Frequency vs rating:
  • common at beginner levels
  • less frequent as rating increases
• Improvement takeaway: biggest rating gains often come from eliminating blunders, not from finding brilliant moves.

7) Missed win

• You had a forced winning line, but you didn’t find it.
• Examples given:
  • checkmate in three
  • winning a queen via tactic
  • the game could have ended immediately
• Instead, you play something else:
  • the game continues
  • sometimes you can even lose later
• Key point: missing a win hurts because the opportunity was already available and “the hard work was done.”

8) Only move

• In some positions, there is exactly one move that keeps the position alive.
• Every other move loses or fails.
• Finding it is framed as:
  • not flashy
  • not brilliant
  • purely about survival
• Strong players can find these moves under pressure by:
  • trusting calculation over instinct

Overall “put it together” framing

• The complete ladder: Best → Brilliant → Good → Inaccuracy → Mistake → Blunder → Missed win → Only move.
• Every game is described as a story formed by how often you move upward on this ladder.

• Rating gains are attributed to systematically reducing errors:

  • blunders → mistakes
  • mistakes → inaccuracies
  • inaccuracies → best moves

• The video concludes: “That’s the whole game.”

Speakers / sources featured

• No specific speakers or external sources are named in the provided subtitles (the narration/voice is unspecified).