Itte Dojo EndgamesReversi endgames · solved to the last disc

65 endgame puzzles. The engine read every one to the end (exact search) and checked that exactly one move wins (or avoids losing). The theme is the main reason the other moves lose.

Continue where you left off →Today's puzzle →One-minute rank check (5 puzzles) →

Puzzle	To move	Empty	Theme	Result
No. 1	● Black	10	Corners Openness	—
No. 2	○ White	11	Parity Corners	—
No. 3	● Black	12	Parity Corners	—
No. 4	● Black	12	Parity Corners	—
No. 5	○ White	13	Parity Openness	—
No. 6	○ White	13	Parity Corners	—
No. 7	● Black	14	Parity Corners	—
No. 8	● Black	14	Corners Openness	—
No. 9	● Black	14	Mobility	—
No. 10	○ White	15	Parity Corners	—
No. 11	● Black	10	Corners	—
No. 12	○ White	11	Parity Corners	—
No. 13	● Black	12	Corners	—
No. 14	○ White	13	Corners Openness	—
No. 15	● Black	14	Reading	—
No. 16	● Black	10	Mobility	—
No. 17	○ White	11	Corners Mobility	—
No. 18	● Black	12	Corners Openness	—
No. 19	○ White	13	Corners Mobility	—
No. 20	● Black	14	Openness	—
No. 21	● Black	10	Openness Mobility	—
No. 22	○ White	11	Openness Mobility	—
No. 23	● Black	12	Mobility	—
No. 24	○ White	13	Reading	—
No. 25	● Black	14	Openness Mobility	—
No. 26	● Black	10	Openness Mobility	—
No. 27	○ White	11	Openness Mobility	—
No. 28	● Black	12	Mobility	—
No. 29	○ White	13	Openness Mobility	—
No. 30	● Black	14	Openness	—
No. 31	● Black	10	Mobility	—
No. 32	○ White	11	Reading	—
No. 33	● Black	12	Reading	—
No. 34	○ White	13	Reading	—
No. 35	● Black	14	Reading	—
No. 36	● Black	10	Reading	—
No. 37	○ White	11	Reading	—
No. 38	● Black	12	Mobility	—
No. 39	○ White	13	Reading	—
No. 40	● Black	14	Reading	—
No. 41	● Black	10	Parity Corners	—
No. 42	○ White	11	Parity Openness	—
No. 43	● Black	12	Parity Corners	—
No. 44	○ White	13	Parity Corners	—
No. 45	● Black	14	Parity Corners	—
No. 46	● Black	10	Corners Openness	—
No. 47	○ White	11	Corners	—
No. 48	● Black	12	Corners Mobility	—
No. 49	○ White	13	Corners	—
No. 50	● Black	14	Corners Mobility	—
No. 51	● Black	10	Openness Mobility	—
No. 52	○ White	11	Openness	—
No. 53	● Black	12	Openness Mobility	—
No. 54	○ White	13	Mobility	—
No. 55	● Black	14	Openness	—
No. 56	● Black	10	Mobility	—
No. 57	○ White	11	Mobility	—
No. 58	● Black	12	Reading	—
No. 59	○ White	13	Reading	—
No. 60	● Black	14	Reading	—
No. 61	● Black	10	Openness	—
No. 62	○ White	11	Openness Mobility	—
No. 63	● Black	12	Openness Mobility	—
No. 64	○ White	13	Openness Mobility	—
No. 65	● Black	14	Openness	—

About these puzzles

Each position comes from a real game. The engine solved it to the end (perfect play by both sides) and only positions with a single best move, clearly better than the second-best move, were kept. "Best play wins by N" is the final disc margin when both sides play perfectly.

If you play a different move, you see the final margin your move leads to with perfect play afterwards, and how much it gave up. Results are stored only in this browser.

To be graded during a full game, go to the Reversi dojo.