The procedure is similar to other ICCF claims, players may use the dropdown menu in the game page to either "Claim a win" or "Claim a draw". They must state in the claim form that they are claiming based on endgame tablebases. Players may only claim positions resolved by 7-piece tablebases. Syzygy tablebases allow perfect play with up to 7 pieces, both with and without the fifty-move drawing rule, i.e., they allow winning all won positions and bringing all drawn positions over the fifty-move line. If the losing player makes a suboptimal move, he will lose sooner, and the program will display the new optimal path. If the game can be won, the path with the least number of moves until the end of this variation is shown, given that both players make the best moves possible. Simply put, the program determines if the position leads to a draw or can be won by either side - with 100% certainty.
#7 PIECE ENDGAME TABLEBASE FREE#
ICCF have an agreement with LiChess whom will provide ICCF Tournament Directors free access to the 7 piece Syzygy tablebases.Įndgame tablebases are computer databases of chess endings with precise calculations for optimal play in any position, provided the number of pieces on the board does not exceed a certain limit. Furthermore the 2019 ICCF Congress in Vilnius, decided that these claims be extended to 7 piece tablebases. You can see how each of the legal moves affect the outcome of the game.The 2013 ICCF Congress in Kraków, decided that for all tournaments started after, players will be allowed to claim a win or draw if the position can be resolved in a 6 piece tablebase position. The tool will show you the game's outcome with best play by both sides and how it changes after each available legal move.įinally, you can click any of the moves to see how this affects the outcome of the game. Playing gxf5 would draw the game, while every other move would make them lose. White must play g5, as this is the only winning move in this position. It'll also list all the moves that win, draw, or lose. Once you have an endgame position and go to the Tablebase tab, this is what you'll see: This is what you'll see when you click the Tablebase tab.Īs you can see, the tablebase shows that this position is a win for White.
Let's look at an example to understand what that means.
#7 PIECE ENDGAME TABLEBASE HOW TO#
How To Understand The Tablebase AssessmentĬ's tablebase will instantly show you the outcome for any position displayed, with best play by both sides. It's easy to set up a position to analyze using the tablebase. After you get the position you want, you simply hit "Load" and go to the Tablebase tab.
Once you're there, you can click the "Setup" option, clear the board, and add the position you want like you normally would. If you're studying specific endgames and you want to check the tablebase, that's also very simple to do! The first step is to go to the Analysis page. You can easily analyze the endgames you've played with the tablebase feature. Once your game reaches an endgame with seven pieces at the most, the Tablebase tab will be available to you. Since this feature is part of our Analysis page, this means that you can instantly analyze your games with it. You can find the new tablebase feature on our Analysis page. The tablebase option will appear to you on the Analysis page every time there are seven or fewer pieces on the board. It's easy to consult tablebases to learn how to play any specific endgame.
Our tool will instantly give you the game's outcome and show you how you can achieve it. With it, you can quickly find out if any position containing seven pieces or less is theoretically winning, losing, or drawn with perfect play from both sides. Tablebases are a database of precalculated endgame positions.