Difference between revisions of "Hash Move"
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* [http://www.talkchess.com/forum/viewtopic.php?t=64093 tt move vs null move] by [[Erin Dame]], [[CCC]], May 27, 2017 » [[Null Move]], [[Null Move Pruning]] | * [http://www.talkchess.com/forum/viewtopic.php?t=64093 tt move vs null move] by [[Erin Dame]], [[CCC]], May 27, 2017 » [[Null Move]], [[Null Move Pruning]] | ||
* [http://www.talkchess.com/forum/viewtopic.php?t=65189 Marginal hash move] by [[Harm Geert Muller]], [[CCC]], September 16, 2017 | * [http://www.talkchess.com/forum/viewtopic.php?t=65189 Marginal hash move] by [[Harm Geert Muller]], [[CCC]], September 16, 2017 | ||
+ | * [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=76888 Best move from previous iteration first: still needed with TT?] by [[Marcel Vanthoor]], [[CCC]], March 16, 2021 » [[PV-Move]] | ||
=References= | =References= |
Revision as of 13:03, 20 March 2021
Home * Chess * Moves * Hash Move
The Hash Move is a Move Ordering related issue.
The Hash Move is a move probed from the transposition table, either a best move of a stored PV-node - a PV-move, or a good enough refutation move to cause a cutoff. This move should most importantly searched first [1] [2]. One may save the move generation at all, if the hash move actually fails high. To guard against rare TT key collisions, one may apply a legality test of the hash move [3].
See also
- Best Move
- Internal Iterative Deepening
- Killer Move
- Mate Killers
- Move Ordering
- Null Move
- Pseudo-Legal Move
- PV-Move
- Refutation Move
- Threat Move from null move refutations
- Transposition Table
Forum Posts
- TTMove legality checking ? & Killers Move Format? by Mahmoud Uthman, CCC, February 08, 2017 » Killer Move
- tt move vs null move by Erin Dame, CCC, May 27, 2017 » Null Move, Null Move Pruning
- Marginal hash move by Harm Geert Muller, CCC, September 16, 2017
- Best move from previous iteration first: still needed with TT? by Marcel Vanthoor, CCC, March 16, 2021 » PV-Move
References
- ↑ but usually after trying the Null Move of the Null Move Heuristic
- ↑ tt move vs null move by Erin Dame, CCC, May 27, 2017
- ↑ Robert Hyatt, Anthony Cozzie (2005). The Effect of Hash Signature Collisions in a Chess Program. ICGA Journal, Vol. 28., No. 3