85.6M
positions
16.3M
practically solved
313.48T
engine nodes
2.4M
analyses
0
in queue
3
active workers
24
active cores
27.8M
nodes / sec
5.1
positions / min
151
proof number
4,667
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 93,178 closures, 2.20T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 210 open obligations, of which 39 (18.6%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · positions a visitor asked for close in 37.4m (median of 7) · measured at 2026-10-17 02:00 UTC
Closures by source, last 24h (93178 of 93178 labelled): USER 64.5% (60091) · FILL 2.1% (1922) · AUTO 33.4% (31103) · SOLVE 0.0% (0) · NONE 0.1% (62) · last 7d (700445 of 700445): USER 87.5% (612575) · FILL 1.0% (6896) · AUTO 11.5% (80477) · SOLVE 0.0% (0) · NONE 0.1% (497). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. e4 e6 … Nf5 16. Rd3 c5 17. Rf3 Re8 (User) · 2.00B nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … 15. Qxf6 Nf5 16. Rd3 c5 17. Rf3 (User) · 2.00B nodes · MoNiKaMaDnEsS-DESKTOP-VG9VPVH-atomicdb
- 1. Nf3 f6 2. e4 e6 … Ne3 18. Kb1 Re8 19. Be6 Nf1 (Fill) · 2.00B nodes · RickEdinson-MSI-atomicdb
Play to explore drag a piece or click two squares
Keyboard move list
First moves from the starting position
| move | state | eval | visits | |
|---|---|---|---|---|
| g1f3 | unsolved | 1158 | 2 | |
| g1h3 | unsolved | 763 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 400 | 2 | |
| e2e4 | unsolved | 400 | 2 | |
| b1c3 | unsolved | 138 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -65 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -260 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -514 | 2 | |
| g2g4 | unsolved | -604 | 2 | |
| c2c4 | unsolved | -700 | 3 |
Contributors by engine nodes
Every position in this tree was searched by somebody's machine. Ties share a place, and the share is measured against everything the whole fleet searched in that window.
Last 24 hours
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | BManBJ 64.2% of the fleet | 1.42T | 14,900 |
| 2 | RickEdinson 20.5% of the fleet | 451.89B | 4,299 |
| 3 | MoNiKaMaDnEsS 15.3% of the fleet | 336.11B | 3,478 |
3 accounts · 2.20T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 28.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.9% of the fleet | 52.97T | 376,132 |
| 3 | tenzink 13.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.0% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.3% of the fleet | 19.85T | 140,897 |
| 6 | Torom 5.0% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.5% of the fleet | 14.22T | 96,014 |
| 8 | JackIV 3.2% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.7% of the fleet | 8.38T | 57,744 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 313.54T nodes searched by the whole fleet.
Proposed campaigns
Anyone can put a line up and vote for it. The site owner decides which one the solver actually runs.
- Should be easiest proof for nf3 e51. Nf3 e5 2. e4proposed by quasa · 18 votes
- Pls nh4 is more solvable than c31. Nf3 f6 2. e4 e6 3. Nc3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. d4 g6 7. Nh4proposed by 67king · 6 votes
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 5 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 4 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- Let's solve Qc8 in 2N Nh6 mainline and/or use it as a benchmark1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Bg4 11. Bh3 Qc8 12. Bh6proposed by soothdest · 3 votes
Showing the 6 most voted of 23 proposals · see every proposal
Milestones
- Oct 17 02:53 Solved: BLACK_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … 10. Bg5 Bf6 11. Nc3 g6 12. Kd2
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Kd2 - Oct 17 02:50 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bf6 11. Nc3 g6 12. Bxf6 cxb5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Bxf6 cxb5 - Oct 17 02:50 Solved: BLACK_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … 10. Bg5 Bf6 11. Nc3 g6 12. Bd2
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Bd2 - Oct 17 02:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 11. Nc3 g6 12. Bd2 Bh4 13. Nxh8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Bd2 Bh4 13. Nxh8 - Oct 17 02:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bf6 11. Nc3 g6 12. Bd2 Bh4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Bd2 Bh4 - Oct 17 02:49 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 c6 … Be6 9. Nd5 Qc7 10. e5 Qb6
1. Nf3 f6 2. e4 c6 3. Ng5 d6 4. Nc3 Bd7 5. Nxh7 Qa5 6. b4 Bh3 7. f3 Bf5 8. Bc4 Be6 9. Nd5 Qc7 10. e5 Qb6 - Oct 17 02:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kb6 25. Qd7 b4 26. Qb7 Ka5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Ne5 b6 13. Qf3 Na6 14. Bxc6 d5 15. Nb5 h6 16. Nd6 Kd8 17. Nc6 Kd7 18. Qh3 Kc7 19. Nc8 b5 20. Qg3 Be5 21. Nxe5 e5 22. Qh3 Rf8 23. Bf6 Kc6 24. Nxa7 Kb6 25. Qd7 b4 26. Qb7 Ka5 - Oct 17 02:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Nxa7 Kb6 25. Qd7 b4 26. Qb7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Ne5 b6 13. Qf3 Na6 14. Bxc6 d5 15. Nb5 h6 16. Nd6 Kd8 17. Nc6 Kd7 18. Qh3 Kc7 19. Nc8 b5 20. Qg3 Be5 21. Nxe5 e5 22. Qh3 Rf8 23. Bf6 Kc6 24. Nxa7 Kb6 25. Qd7 b4 26. Qb7 - Oct 17 02:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kc6 24. Nxa7 Kb6 25. Qd7 b4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Ne5 b6 13. Qf3 Na6 14. Bxc6 d5 15. Nb5 h6 16. Nd6 Kd8 17. Nc6 Kd7 18. Qh3 Kc7 19. Nc8 b5 20. Qg3 Be5 21. Nxe5 e5 22. Qh3 Rf8 23. Bf6 Kc6 24. Nxa7 Kb6 25. Qd7 b4 - Oct 17 02:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Bf6 Kc6 24. Nxa7 Kb6 25. Qd7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Ne5 b6 13. Qf3 Na6 14. Bxc6 d5 15. Nb5 h6 16. Nd6 Kd8 17. Nc6 Kd7 18. Qh3 Kc7 19. Nc8 b5 20. Qg3 Be5 21. Nxe5 e5 22. Qh3 Rf8 23. Bf6 Kc6 24. Nxa7 Kb6 25. Qd7 - Oct 17 02:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf8 23. Bf6 Kc6 24. Nxa7 Kb6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Ne5 b6 13. Qf3 Na6 14. Bxc6 d5 15. Nb5 h6 16. Nd6 Kd8 17. Nc6 Kd7 18. Qh3 Kc7 19. Nc8 b5 20. Qg3 Be5 21. Nxe5 e5 22. Qh3 Rf8 23. Bf6 Kc6 24. Nxa7 Kb6 - Oct 17 02:47 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. Qh3 Rf8 23. Bf6 Kc6 24. Nxa7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Bf5 7. d3 Nf6 8. g4 e6 9. gxf5 Be7 10. Bg5 Bf6 11. Nc3 g6 12. Ne5 b6 13. Qf3 Na6 14. Bxc6 d5 15. Nb5 h6 16. Nd6 Kd8 17. Nc6 Kd7 18. Qh3 Kc7 19. Nc8 b5 20. Qg3 Be5 21. Nxe5 e5 22. Qh3 Rf8 23. Bf6 Kc6 24. Nxa7