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    In tournaments, we run an automatic engine analysis for all the games immediately after they are completed. We compare the moves played by the players against the engine moves, i.e. seeing how accurate their moves are.

    NOTE: These metrics are visible ONLY to you. Your students will NOT see them.

    1. “Fair Play” tab

    You can see this information in the “Fair Play” tab of the tournament:

    2. Key Metrics

    Before talking about the table of data, first let’s discuss about some important merics:

    a) Centipawn

    The centipawn is the unit of measure used in chess as measure of the advantage. A centipawn is equal to 1/100 of a pawn. Therefore, 100 centipawns = 1 pawn. These values play no formal role in the game but are useful to players, and essentials in computer chess, in order to evaluate positions.

    b) Centipawn Loss (CPL)

    It is the loss of centipawns associated with a move. A perfect move will have a centipawn loss of 0. We measure how far below perfect a move is in 1/100ths of a pawn (i.e. centipawn). If you blunder a bishop, a loss of 3 pawns, you have a 300 centipawn loss for that move.

    c) Move Match % ( MM%)

    It is the percentage of moves made by a player matching with the engine’s move. In the “Fair Play” tab, we show MM% for both top-3 engine moves (i.e. player’s move matching with engine’s top-3 choices) and the top-1 move.

    3. Main table

    As you can see in the “Fair Play” tab, the main table will show the following data:

    • Rank: This is the current ranking/standing of the players in the tournament (In the above example, it is ranking after the 3 rounds as we can see the “Publish Round 4 pairings” button)
    • Players: List of players in the tournament
    • Ratings: Ratings of the players (rating system selected for the tournament – learn more)
    • Games Played: Total games played in the tournament at that moment
    • Moves Analyzed: Total moves analyzed out of total moves played in the tournament. 114/115 means that 114 moves were analyzed out of the total 115 moves made by the player throughout the tournament
    • Average CPL: Average centipawn loss of the players
    • Average MM%: Average Move Match% with top-3 engine moves
    • Best CPL: Best (lowest) centipawn loss of the players in the tournament (centipawn loss of the player in the single “best” game)
    • Best MM%: Best (highest) Move Match% with top-3 engine moves of the players in the tournament (% of player moves matching with engine’s top-3 choice in the single “best” game)

    4. Round-level details

    You can click on a row to see detailed stats of a particular player. This will show the stats of individual rounds/games:

    You can see the following stats for a player for each round/game:

    • Round number
    • Result – whether the player won, or lost, or drew
    • Opponent (the player played against)
    • Board preview and game moves
    • Moves matched: Number of moves made by the player matching with engine’s top-1 move for that game
    • CPL: Centipawn loss of the player for that game
    • MM% Top-3: Percentage of moves made by the player matching with engine’s top-3 moves
    • MM% Top-1: Percentage of moves made by the player matching with engine’s top-1 move

    In the above screenshot, we can see that this player has a “Best CPL” of 12.31 and “Best MM%” of 87.5% in the main table. And we can see that this “best” result was from Round-1.

    This will help you better evaluate when a player has exceptional results in a particular game, although the player might have a decent or lower value for “Average CPL” and “Average MM%”.

    a) Preview game

    You can click the “Show Moves” to preview the game here itself:

    b) Game Evaluation

    You can also see the evaluation added for each move for all games. For example, when you view a game on board from the “Pairings” tab, you can find the “eval” annotations added to the game:

    5. Threshold values for highlighting “best” results

    For your convenience, we highlight the table values (CPL and MM%) in “Red” and “Amber” colours based on the following condition:

    a) CPL

    • Red: < 25
    • Amber: >= 25 and < 30

    b) MM% Top-3

    • Red: >= 90%
    • Amber: >= 80% and < 90%

    c) MM% Top-1

    • Red: >= 70%
    • Amber: >= 50% and < 70%

    Let’s take a look at the below example:

    • In Round-1, the player’s CPL is in “Red” because it is 12.31, which is less than the threshold value of 25.
    • In Round-3, the player’s “MM% Top-3” of  75.56 % is not highlighted because it is less than than the minimum threshold value of 80% to be highlighted  in “Amber”. However, the player’s “MM% Top-1” of 64.44 % is highlighted in “Amber” as it is greater than the minimum threshold of 50%.

    6. Important notes

    • During this process, we ONLY compare the moves made by the player with the engine and say how many of them match. We do NOT say that the player took computer assistance while playing.
    • It is also important to take a look at the total number of moves played in the game. Shorter games tend to have higher MM% values.
    • You can also see the player’s rating to evaluate their strength.
    • The move-level evaluation shown for each move in all games will help you to understand when the player is playing more accurately or more badly.
    • It is better to evaluate multiple games played by the player in the tournament, than just looking at one game.

    Additionally, the “Rank” column will be updated only after the completion of the current round. For example, until “Complete Round 3” is clicked, it will show the rankings after Round-2. Only after you click “Complete Round” for the current round, the new “Rank” will be updated.

    You can also sort the table columns in ascending and descending orders. For example, clicking on the “Best MM%” column will sort it ascending/descending order, i.e. players with lowest/highest MM%:

    in Tournaments