Medium Anti checkers
Medium Anti checkers is the default opponent for giveaway on Checkerso. Same rules as Anti checkers: you still must jump, and you win by having no move — or no pieces left.
Easy searches less. Hard searches more.
Giveaway rules at Medium
You win by having no legal move, or no pieces left. Movement matches American checkers — forced jumps still apply — but the result is reversed.
- If you can jump, you must; that is how you often force the opponent to take your men.
- Kings walk one square; they do not fly.
- Crowning on the last rank ends the turn.
Medium Anti search depth
The Medium opponent searches with alpha-beta depth about 3 and extends into capture sequences (quiescence).
The evaluation is tuned for giveaway play — fewer of your pieces and fewer moves for you are better.
It catches straightforward threats but not every long combination.
Medium giveaway setups
Edge play
Pieces on the rim have fewer jump directions. Medium will dodge the most obvious center baits, but edge lanes can still force predictable captures.
Two-step sacrifices
Set up a giveaway that only works after your next move. Medium sees one ply deeper than Easy, so hide the payoff behind a quiet preparatory slide.
Do not hoard kings
Several kings give you mobility you do not want. Trade them into jump lines before Medium steers you into a position with safe moves left.
Anti checkers difficulty levels compared
| Level | Best for | Search | Typical gap | Practice focus |
|---|---|---|---|---|
| Easy | First games of English giveaway | alpha-beta depth ≈ 1 (no quiescence) | Walks into obvious feed-and-run chains | Line up sacrifices the AI must take in one turn |
| Medium (this page) | Players who know the reversed goal | alpha-beta depth ≈ 3 (with quiescence on captures) | Dodges the clearest one-move baits; shorter sacrifice math | Use the edges to limit where the opponent can jump |
| Hard | Longer sacrifice setups | alpha-beta depth ≈ 5 (with quiescence on captures) | Plans several jumps ahead; fewer free giveaways | Set traps that only pay off after two of your moves |
Need a refresher on the basics? Read the complete Anti Checkers guide and rules on Checkerso for English giveaway tactics, sacrifice lines, and reversed win conditions.
Frequently asked questions
What does Medium Anti checkers change compared with Easy?
Only search depth: about three plies with capture extensions. The giveaway win condition and mandatory jumps stay the same.
Can I choose which jump to make in Anti checkers?
Yes. When several jumps are legal, you may pick any of them — you are not required to take the longest line.
Why did I lose with pieces still on the board?
You lose when the opponent cannot move. In Anti checkers that can look like a win on the end card until you read the reason line.