Endgame & Parity

Only the "Final Disc Count" Decides It

Let's say it once more: the count in Othello is only the disc count when the game ends. Being behind on discs entering the endgame is no problem at all. In fact, the side behind on discs is often ahead in stable discs and mobility. It's common to sweep the board from a small minority in the closing moves.

Count the Stable Discs

Your most reliable asset in the endgame is stable discs — discs that can never be flipped again. Corners, and the edge discs connected to them, are the prime examples. Estimating how many stable discs each side will finish with gives you a read on who's winning.

🔑 The endgame lens Think in terms of the discs that will be stable at the end, not the count right now. Discs that will flip don't count.

Parity

The famous endgame technique is parity. Divide the remaining empty squares into "regions." Because players alternate, which side gets to play the last move in a region tends to be decided by whether that region's empty-square count is odd or even.

Roughly: keep each region even and arrange to make the last move yourself, and you tend to come out ahead. The side that plays last can lock in discs with no fear of them being flipped back — worth several squares.

The exact math is hard, so as a beginner/intermediate it's enough to hold the instinct: don't give your opponent the last move in the endgame.

The Last-Move Advantage

Letting your opponent play first in a region and then closing it yourself is the last-move advantage. Take it, and you lock in that region's discs safely, gaining squares in the endgame. Resist the urge to move first — let your opponent commit.

A Practical Endgame Routine

Secure corners and stable discs first.
Avoid X- and C-squares to the end (make your opponent play them).
Track the empty-square regions and keep the last move for yourself.
Once the position is readable, count discs and choose the maximum.

💡 Train the endgame in Game Dojo One slip in the endgame can be fatal. Use undo to try branches and watch how the evaluation bar moves — you'll see parity and the last-move advantage with your own eyes.

Feel the endgame comeback

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