56.6M
positions
9.0M
practically solved
204.84T
engine nodes
1.6M
analyses
6,878
in queue
12
active workers
81
active cores
26.1M
nodes / sec
21.9
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 16.0% of tree positions solved · last 24h: 369,708 closures, 5.58T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 167 open obligations, of which 31 (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 4.1h (median of 187) · measured at 2026-09-18 19:00 UTC
Closures by source, last 24h (369708 of 369708 labelled): USER 99.9% (369189) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (519) · last 7d (1590570 of 1590570): USER 98.2% (1561795) · FILL 0.2% (3855) · AUTO 1.3% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3840). 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 … f5 23. h4 Re8 24. Kh2 Bb5 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … f5 23. h4 Re8 24. Kh2 Ba4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 10. c4 Nb8 11. b4 Bh6 12. h3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 e5 2. e4 Qe7 … 6. Bb5 Nc6 7. O-O a6 8. Nc3 (User) · 2.00B nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 f6 2. e4 e5 … g6 16. Re1 Rh7 17. h4 Rb8 (User) · 512.0M nodes · JackIV-customer.tmpeazx1.isp.starlink.com-atomicdb#0
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 | 1091 | 2 | |
| g1h3 | unsolved | 770 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 434 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 91 | 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 | Torom 25.3% of the fleet | 1.41T | 9,806 |
| 2 | BManBJ 23.2% of the fleet | 1.29T | 9,656 |
| 3 | auranvesdranor 22.3% of the fleet | 1.24T | 9,433 |
| 4 | randomchampgamer 11.2% of the fleet | 624.30B | 4,659 |
| 5 | tenzink 10.0% of the fleet | 558.63B | 3,902 |
| 6 | MoNiKaMaDnEsS 4.2% of the fleet | 231.92B | 1,400 |
| 7 | JackIV 2.7% of the fleet | 148.62B | 607 |
| 8 | quasa 1.2% of the fleet | 66.94B | 424 |
8 accounts · 5.57T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.9% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.6% of the fleet | 33.96T | 289,211 |
| 3 | auranvesdranor 10.9% of the fleet | 22.40T | 160,574 |
| 4 | BManBJ 10.6% of the fleet | 21.70T | 146,922 |
| 5 | JackIV 4.0% of the fleet | 8.09T | 57,179 |
| 6 | randomchampgamer 3.6% of the fleet | 7.29T | 51,857 |
| 7 | RickEdinson 3.1% 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 | 3.79T | 23,983 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 204.88T 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 18 19:15 Solved: BLACK_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f6 … 9. Bc4 Bd5 10. Ba6 Bxe4 11. Rh3
1. Nf3 d6 2. Ng5 f6 3. f3 Bg4 4. Nxh7 c6 5. Nc3 Qa5 6. e4 Be6 7. h4 Nd7 8. b4 Qg5 9. Bc4 Bd5 10. Ba6 Bxe4 11. Rh3 - Sep 18 19:15 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Ra6 11. h3 f5 12. g3 dxe4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 - Sep 18 19:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rf6 17. dxe5 Kc7 18. Qe5 Kb6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 13. O-O Rd6 14. Bf4 h5 15. Bd7 e5 16. Bg5 Rf6 17. dxe5 Kc7 18. Qe5 Kb6 - Sep 18 19:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 16. Bg5 Rf6 17. dxe5 Kc7 18. Qe5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 13. O-O Rd6 14. Bf4 h5 15. Bd7 e5 16. Bg5 Rf6 17. dxe5 Kc7 18. Qe5 - Sep 18 19:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … e5 16. Bg5 Rf6 17. dxe5 Kc7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 13. O-O Rd6 14. Bf4 h5 15. Bd7 e5 16. Bg5 Rf6 17. dxe5 Kc7 - Sep 18 19:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 15. Bd7 e5 16. Bg5 Rf6 17. dxe5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 13. O-O Rd6 14. Bf4 h5 15. Bd7 e5 16. Bg5 Rf6 17. dxe5 - Sep 18 19:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … h5 15. Bd7 e5 16. Bg5 Rf6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 13. O-O Rd6 14. Bf4 h5 15. Bd7 e5 16. Bg5 Rf6 - Sep 18 19:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. Bf4 h5 15. Bd7 e5 16. Bg5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 13. O-O Rd6 14. Bf4 h5 15. Bd7 e5 16. Bg5 - Sep 18 19:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Rd6 14. Bf4 h5 15. Bd7 e5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 13. O-O Rd6 14. Bf4 h5 15. Bd7 e5 - Sep 18 19:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. O-O Rd6 14. Bf4 h5 15. Bd7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 13. O-O Rd6 14. Bf4 h5 15. Bd7 - Sep 18 19:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … dxe4 13. O-O Rd6 14. Bf4 h5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 13. O-O Rd6 14. Bf4 h5 - Sep 18 19:15 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 12. g3 dxe4 13. O-O Rd6 14. Bf4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 a5 7. e4 g6 8. Bb5 Kd8 9. Qe2 d5 10. d4 Ra6 11. h3 f5 12. g3 dxe4 13. O-O Rd6 14. Bf4