8/5b2/p2k4/1p1p1p1p/1P1K1P1P/2P1PB2/8/8/w Bf3e2 (Speelman_EP) (page 65, 121. White wins, "corresponding squares")
6n1/p1BN3b/p1p3np/p1p3pq/6kr/K1P2r1p/2PPQ3/8/w Qe2e6+ (Speelman_EP) (EP page 68, 126. In this incredible problem by W. Joergensen, white mates in 200 and all his moves are unique! It ought to be possible to solve it by computer if forcing lines are investigated deeply and transposition tables are used...? The only captures in the solution are 60. KxPa3, 141. QxPc4+, and 180. KxPa3. It ends 200. Qe2 mate.)
3k4/pp6/2pK2p1/3p3p/8/2P4P/PP4P1/8/w Pb2b4 (Horowitz) (followed by a4 and b5, allegedly the only win according to many pages of analysis by Max Euwe on an ending that came up in practice, page 191.)
4k3/8/r3P3/5K2/8/8/8/1R6/b Ra6a2 (Horowitz) (no comment)
r3k3/8/8/4PK2/8/8/8/1R6/w Kf5f6 (Horowitz) (last position I've taken from Horowitz)
begin examples from (Averbakh)
8/5K1k/8/5N2/8/3p4/3N4/8/w Nd2e4 (Averbakh) (9 page 6, mate in 4)
4B1nk/5P2/6K1/8/8/8/8/8/w Pf7f8=B (WDS exercises) (Bob Holt; KBBvKN is a win, say databases)
8/2P1P1P1/3PkP2/8/4K3/8/8/8/w Pe7e8=B (WDS exercises) (and mate in 3: 1... Kxf6 (or d6, sym.), 2. g8=R! Ke6, 3. Rg6 mate. Other moves mate slower, or lead to stalemate. This is not a suitable test if your computer does not seek fastest mates.)