54.0M
positions
8.4M
practically solved
195.98T
engine nodes
1.6M
analyses
1,384
in queue
9
active workers
66
active cores
6.9M
nodes / sec
20.0
positions / min
131
proof number
3,716
disproof number
Root conquest: 0/20 first moves solved · 15.5% of tree positions solved · last 24h: 346,742 closures, 4.48T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 165 open obligations, of which 30 (18.2%) 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 23.9m (median of 156) · measured at 2026-09-17 01:00 UTC
Closures by source, last 24h (346742 of 346742 labelled): USER 99.8% (346095) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (647) · last 7d (1275288 of 1275288): USER 91.5% (1166603) · FILL 1.2% (15191) · AUTO 7.0% (89517) · SOLVE 0.0% (0) · NONE 0.3% (3977). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f5 2. e3 e6 … 8. Nxe6 Nf6 9. Bd3 Nd5 10. Ke2 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f5 2. e3 e6 … 8. Nxe6 Nf6 9. Bd3 Nd5 10. O-O (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 f5 2. e3 e6 … 8. Nxe6 Nf6 9. Bd3 Nd5 10. Kf1 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f6 … b5 8. a4 Nh6 9. h3 f5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f6 … b5 8. a4 Nh6 9. h3 e5 (User) · 128.0M nodes · randomchampgamer-2026PC-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 | 1079 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 502 | 3 | |
| e2e4 | unsolved | 409 | 2 | |
| d2d4 | unsolved | 408 | 2 | |
| b1c3 | unsolved | 74 | 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 31.9% of the fleet | 1.43T | 11,032 |
| 2 | BManBJ 30.9% of the fleet | 1.38T | 10,719 |
| 3 | tenzink 14.0% of the fleet | 625.99B | 3,723 |
| 4 | randomchampgamer 12.8% of the fleet | 575.42B | 4,501 |
| 5 | MoNiKaMaDnEsS 7.6% of the fleet | 340.19B | 2,177 |
| 6 | NeoArcturus 1.9% of the fleet | 85.13B | 244 |
| 7 | JackIV 0.9% of the fleet | 40.93B | 286 |
7 accounts · 4.48T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 40.6% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.8% of the fleet | 32.95T | 283,145 |
| 3 | auranvesdranor 10.2% of the fleet | 19.98T | 142,188 |
| 4 | BManBJ 9.9% of the fleet | 19.42T | 129,714 |
| 5 | JackIV 4.1% of the fleet | 7.94T | 56,572 |
| 6 | RickEdinson 3.2% of the fleet | 6.32T | 41,667 |
| 7 | randomchampgamer 3.2% of the fleet | 6.24T | 43,817 |
| 8 | NeoArcturus 2.1% of the fleet | 4.09T | 16,751 |
| 9 | ijh 1.8% of the fleet | 3.57T | 37,348 |
| 10 | MoNiKaMaDnEsS 1.8% of the fleet | 3.45T | 21,978 |
and 22 more.
32 accounts · 196.09T 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 · 15 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 18 proposals · see every proposal
Milestones
- Sep 17 01:56 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … h4 10. h3 Rh7 11. Na3 Kd7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bd7 17. Qg5 bxa3 18. Qd8 Kb7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5 14. Nxg6 b4 15. Bxf8 Kc7 16. Qh5 Bd7 17. Qg5 bxa3 18. Qd8 Kb7 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Qh5 Bd7 17. Qg5 bxa3 18. Qd8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5 14. Nxg6 b4 15. Bxf8 Kc7 16. Qh5 Bd7 17. Qg5 bxa3 18. Qd8 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kc7 16. Qh5 Bd7 17. Qg5 bxa3
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5 14. Nxg6 b4 15. Bxf8 Kc7 16. Qh5 Bd7 17. Qg5 bxa3 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 15. Bxf8 Kc7 16. Qh5 Bd7 17. Qg5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5 14. Nxg6 b4 15. Bxf8 Kc7 16. Qh5 Bd7 17. Qg5 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b4 15. Bxf8 Kc7 16. Qh5 Bd7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5 14. Nxg6 b4 15. Bxf8 Kc7 16. Qh5 Bd7 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 14. Nxg6 b4 15. Bxf8 Kc7 16. Qh5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5 14. Nxg6 b4 15. Bxf8 Kc7 16. Qh5 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … b5 14. Nxg6 b4 15. Bxf8 Kc7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5 14. Nxg6 b4 15. Bxf8 Kc7 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 13. Be7 b5 14. Nxg6 b4 15. Bxf8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5 14. Nxg6 b4 15. Bxf8 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 13. Be7 b5 14. Nxg6 b4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5 14. Nxg6 b4 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 12. Nh8 d5 13. Be7 b5 14. Nxg6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5 14. Nxg6 - Sep 17 01:56 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kd7 12. Nh8 d5 13. Be7 b5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 h4 10. h3 Rh7 11. Na3 Kd7 12. Nh8 d5 13. Be7 b5