Helpmate tablebases Every solution to every position, precomputed.

Themes

The 24 themes below are the ones that appear on the problems selected for this site, drawn from 302 materials (234 of which hold a helpmate). The engine can detect 26 themes (30 registry entries, some colour-specific) directly from the tables; the Helpmate Analyzer glossary names 295 in all, so this list is short by design rather than incomplete.

closed-walk 88 problems

excelsior 219 problems

excelsior:black 16 problems

excelsior:white 203 problems

ideal 542 problems

kniest 41 problems

mirror 422 problems

model 766 problems

nocapture 358 problems

nocheck 436 problems

pendulum 51 problems

phoenix 38 problems

promotion 380 problems

pure 790 problems

self-block 470 problems

set-play 84 problems

single-piece 589 problems

single-piece:black 560 problems

single-piece:white 74 problems

switchback 252 problems

umnov 241 problems

underpromotion 129 problems

zajic 1 problem

zilahi 24 problems