57.7M
positions
9.4M
practically solved
208.53T
engine nodes
1.6M
analyses
2,953
in queue
15
active workers
97
active cores
8.9M
nodes / sec
33.0
positions / min
131
proof number
3,776
disproof number
Root conquest: 0/20 first moves solved · 16.3% of tree positions solved · last 24h: 479,482 closures, 5.88T 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 3.2h (median of 175) · measured at 2026-09-19 07:00 UTC
Closures by source, last 24h (479427 of 479427 labelled): USER 99.8% (478605) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (822) · last 7d (1865537 of 1865537): USER 98.5% (1836969) · FILL 0.2% (3641) · AUTO 1.1% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3847). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f6 2. Nc3 h6 … 9. Nf4 Ng4 10. Nxh5 Rh5 11. h3 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … 9. Nf4 Ng4 10. Nxh5 Rh5 11. b5 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … Rc8 10. c3 g6 11. d4 Bb8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … Rc8 10. c3 g6 11. d4 Re8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … dxe5 18. c5 g5 19. d5 f4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
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 23.7% of the fleet | 1.40T | 10,612 |
| 2 | BManBJ 22.5% of the fleet | 1.32T | 9,685 |
| 3 | Torom 18.0% of the fleet | 1.06T | 7,591 |
| 4 | JackIV 11.7% of the fleet | 688.21B | 3,870 |
| 5 | randomchampgamer 10.0% of the fleet | 586.66B | 4,348 |
| 6 | tenzink 9.3% of the fleet | 548.73B | 3,540 |
| 7 | quasa 2.6% of the fleet | 152.52B | 1,034 |
| 8 | MoNiKaMaDnEsS 2.2% of the fleet | 129.47B | 754 |
8 accounts · 5.88T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.2% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.4% of the fleet | 34.28T | 291,218 |
| 3 | auranvesdranor 11.1% of the fleet | 23.15T | 166,257 |
| 4 | BManBJ 10.8% of the fleet | 22.45T | 152,455 |
| 5 | JackIV 4.1% of the fleet | 8.63T | 60,442 |
| 6 | randomchampgamer 3.6% of the fleet | 7.56T | 54,058 |
| 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 · 208.67T 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 07:37 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … dxe5 18. c5 g5 19. d5 g4
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bg2 25. Rfd1 Bd5 26. Qc7 Ke8
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5 22. g3 Bg7 23. Qf4 Bd4 24. Nxd4 Bg2 25. Rfd1 Bd5 26. Qc7 Ke8 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Nxd4 Bg2 25. Rfd1 Bd5 26. Qc7
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5 22. g3 Bg7 23. Qf4 Bd4 24. Nxd4 Bg2 25. Rfd1 Bd5 26. Qc7 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bd4 24. Nxd4 Bg2 25. Rfd1 Bd5
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5 22. g3 Bg7 23. Qf4 Bd4 24. Nxd4 Bg2 25. Rfd1 Bd5 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Qf4 Bd4 24. Nxd4 Bg2 25. Rfd1
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5 22. g3 Bg7 23. Qf4 Bd4 24. Nxd4 Bg2 25. Rfd1 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bg7 23. Qf4 Bd4 24. Nxd4 Bg2
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5 22. g3 Bg7 23. Qf4 Bd4 24. Nxd4 Bg2 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. g3 Bg7 23. Qf4 Bd4 24. Nxd4
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5 22. g3 Bg7 23. Qf4 Bd4 24. Nxd4 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … exd5 22. g3 Bg7 23. Qf4 Bd4
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5 22. g3 Bg7 23. Qf4 Bd4 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Qa4 exd5 22. g3 Bg7 23. Qf4
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5 22. g3 Bg7 23. Qf4 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bb7 21. Qa4 exd5 22. g3 Bg7
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5 22. g3 Bg7 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Nb5 Bb7 21. Qa4 exd5 22. g3
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5 22. g3 - Sep 19 07:37 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g4 20. Nb5 Bb7 21. Qa4 exd5
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 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Kd8 17. Nc3 dxe5 18. c5 g5 19. d5 g4 20. Nb5 Bb7 21. Qa4 exd5