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Spiegazione
Le basi Nalimov, sviluppate da Eugene Nalimov, precalcolano finali da tre a sei pezzi contando entrambi i re e furono uno standard pratico per motori e interfacce.
La misura principale è DTM, distance to mate. Determina vittoria, patta o sconfitta e, quando serve, la distanza dal matto con gioco che la abbrevia o ritarda.
Indicizzazione e compressione efficienti permisero di consultarle durante la ricerca, ma l'insieme completo a sei pezzi è grande e il codice storico ha condizioni diverse dalle alternative moderne.
DTM non è progettata intorno al contatore delle cinquanta mosse: un matto matematico può essere patta regolamentare. usa WDL e DTZ; offre DTM normalmente fino a cinque pezzi.
Uso e contesto
Nalimov resta importante per formati storici, risultati DTM e software compatibile.
Confusioni comuni
Sei pezzi
Il limite include entrambi i re.
Esattezza e regola delle cinquanta mosse
DTM è esatta per la sua metrica, ma il risultato regolamentare può cambiare con il contatore.
Fonti
- 1.Nalimov Tablebases, Chess Programming Wiki
- 2.Web Query for Nalimov Endgame Tablebases, Knowledge4IT