57.8M
positions
9.5M
practically solved
208.80T
engine nodes
1.6M
analyses
2,013
in queue
15
active workers
97
active cores
4.6M
nodes / sec
31.1
positions / min
131
proof number
3,776
disproof number
Root conquest: 0/20 first moves solved · 16.4% of tree positions solved · last 24h: 505,290 closures, 6.01T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 78 over 165 open obligations, of which 28 (17.0%) 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 16.6m (median of 199) · measured at 2026-09-19 08:00 UTC
Closures by source, last 24h (505162 of 505204 labelled): USER 99.8% (504338) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (824) · last 7d (1900432 of 1900518): USER 98.5% (1871922) · FILL 0.2% (3608) · AUTO 1.1% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3822). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 e6 2. e3 g6 … 12. g3 Kg8 13. d3 Na6 14. Rh3 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 12. g3 Kg8 13. d3 Na6 14. Rh2 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … 12. g3 Kg8 13. d3 Na6 14. Kd1 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … Kf8 9. c4 a6 10. Be8 h4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Ka7 23. O-O d5 24. b4 a5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
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 | 1101 | 2 | |
| g1h3 | unsolved | 801 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 414 | 2 | |
| b1c3 | unsolved | 71 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -100 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| f2f3 | unsolved | -110 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -223 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -502 | 2 | |
| g2g4 | unsolved | -600 | 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 | auranvesdranor 24.2% of the fleet | 1.46T | 11,079 |
| 2 | BManBJ 22.1% of the fleet | 1.33T | 9,763 |
| 3 | Torom 17.0% of the fleet | 1.02T | 7,308 |
| 4 | JackIV 12.3% of the fleet | 738.06B | 4,225 |
| 5 | randomchampgamer 9.7% of the fleet | 584.90B | 4,333 |
| 6 | tenzink 9.1% of the fleet | 550.03B | 3,560 |
| 7 | quasa 3.4% of the fleet | 201.44B | 1,404 |
| 8 | MoNiKaMaDnEsS 2.2% of the fleet | 129.47B | 754 |
8 accounts · 6.01T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.1% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.4% of the fleet | 34.31T | 291,502 |
| 3 | auranvesdranor 11.1% of the fleet | 23.25T | 167,045 |
| 4 | BManBJ 10.8% of the fleet | 22.55T | 153,171 |
| 5 | JackIV 4.2% of the fleet | 8.68T | 60,797 |
| 6 | randomchampgamer 3.6% of the fleet | 7.60T | 54,335 |
| 7 | RickEdinson 3.0% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 2.0% of the fleet | 4.09T | 16,751 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.84T | 24,377 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 209.04T 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 · 16 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
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 19 proposals · see every proposal
Milestones
- Sep 19 09:00 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Kg8 9. d4 f5 10. exf5 h4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 - Sep 19 09:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g6 12. Qf3 Be7 13. Qf8 Kh7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 11. Qg4 g6 12. Qf3 Be7 13. Qf8 Kh7 - Sep 19 09:00 Solved: WHITE_WIN via MINIMAXview
1. d4 c6 2. Nc3 f6 … c5 23. dxc5 Ke6 24. Qd6 Kf7
1. d4 c6 2. Nc3 f6 3. Nf3 e6 4. g4 Nh6 5. e4 g6 6. Nh4 Nxg4 7. Bf4 d6 8. Nb5 Qa5 9. c3 Qa4 10. b3 Qc4 11. Bd3 Nd7 12. Nc7 Kd8 13. Bxc4 Ne5 14. Bxe5 Bh6 15. f4 e5 16. Ne6 Ke7 17. h3 exf4 18. Ng5 Rf8 19. Nxh7 f5 20. e5 d5 21. Qc1 f4 22. Qa3 c5 23. dxc5 Ke6 24. Qd6 Kf7 - Sep 19 09:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 11. Qg4 g6 12. Qf3 Be7 13. Qf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 11. Qg4 g6 12. Qf3 Be7 13. Qf8 - Sep 19 09:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … h4 11. Qg4 g6 12. Qf3 Be7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 11. Qg4 g6 12. Qf3 Be7 - Sep 19 09:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 10. exf5 h4 11. Qg4 g6 12. Qf3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 11. Qg4 g6 12. Qf3 - Sep 19 09:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … f5 10. exf5 h4 11. Qg4 g6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 11. Qg4 g6 - Sep 19 09:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 9. d4 f5 10. exf5 h4 11. Qg4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 11. Qg4 - Sep 19 09:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … e5 12. Qh5 exd4 13. Qh7 Kf7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 11. c3 e5 12. Qh5 exd4 13. Qh7 Kf7 - Sep 19 09:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 11. c3 e5 12. Qh5 exd4 13. Qh7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 11. c3 e5 12. Qh5 exd4 13. Qh7 - Sep 19 09:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … h4 11. c3 e5 12. Qh5 exd4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 11. c3 e5 12. Qh5 exd4 - Sep 19 09:00 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 10. exf5 h4 11. c3 e5 12. Qh5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 h5 8. Bb5 Kg8 9. d4 f5 10. exf5 h4 11. c3 e5 12. Qh5