59.2M
positions
9.9M
practically solved
213.17T
engine nodes
1.7M
analyses
5,470
in queue
11
active workers
65
active cores
14.7M
nodes / sec
23.7
positions / min
131
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 16.8% of tree positions solved · last 24h: 573,352 closures, 6.04T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 79 over 168 open obligations, of which 28 (16.7%) 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 1.8m (median of 89) · measured at 2026-09-20 03:00 UTC
Closures by source, last 24h (573340 of 573349 labelled): USER 99.9% (572879) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (461) · last 7d (2241943 of 2241946): USER 98.7% (2213497) · FILL 0.2% (3608) · AUTO 0.9% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3758). 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 … f4 12. e4 g6 13. e5 Bh6 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … 20. d5 Ba6 21. dxc6 Rf8 22. Bd8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nh3 h6 2. d4 e6 … a6 9. e4 axb5 10. Bh4 Rxa2 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nh3 e5 2. e4 Nc6 … Nb4 6. Bb5 c6 7. Ng5 Qh4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 h6 2. d4 e6 … a6 9. e4 axb5 10. Bh4 Bd7 (User) · 128.0M nodes · BManBJ-Laptop-Blake-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 | 1091 | 2 | |
| g1h3 | unsolved | 717 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 72 | 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 | BManBJ 25.6% of the fleet | 1.54T | 11,333 |
| 2 | auranvesdranor 20.6% of the fleet | 1.24T | 9,503 |
| 3 | JackIV 16.5% of the fleet | 998.92B | 4,952 |
| 4 | Torom 14.8% of the fleet | 894.68B | 6,309 |
| 5 | tenzink 10.2% of the fleet | 614.83B | 4,219 |
| 6 | randomchampgamer 8.5% of the fleet | 516.10B | 4,172 |
| 7 | quasa 2.4% of the fleet | 143.45B | 1,057 |
| 8 | MoNiKaMaDnEsS 1.2% of the fleet | 70.48B | 477 |
| 9 | soothdest 0.2% of the fleet | 10.29B | 79 |
| 10 | NeoArcturus <0.1% of the fleet | 640.0M | 5 |
10 accounts · 6.04T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.4% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.3% of the fleet | 34.78T | 294,619 |
| 3 | auranvesdranor 11.3% of the fleet | 24.09T | 173,462 |
| 4 | BManBJ 11.1% of the fleet | 23.73T | 161,820 |
| 5 | JackIV 4.4% of the fleet | 9.46T | 64,152 |
| 6 | randomchampgamer 3.7% of the fleet | 7.98T | 57,470 |
| 7 | RickEdinson 3.0% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 1.9% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.87T | 24,568 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 213.20T 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 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … d5 10. Bg5 a6 11. Be7 a5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 f5 9. d4 d5 10. Bg5 a6 11. Be7 a5 - Sep 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … d5 10. Bg5 a6 11. Be7 f4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 f5 9. d4 d5 10. Bg5 a6 11. Be7 f4 - Sep 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kh7 12. Qh5 Kh8 13. Qg6 Bxe7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 f5 9. d4 d5 10. Bg5 a6 11. Be7 Kh7 12. Qh5 Kh8 13. Qg6 Bxe7 - Sep 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 11. Be7 Kh7 12. Qh5 Kh8 13. Qg6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 f5 9. d4 d5 10. Bg5 a6 11. Be7 Kh7 12. Qh5 Kh8 13. Qg6 - Sep 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … a6 11. Be7 Kh7 12. Qh5 Kh8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 f5 9. d4 d5 10. Bg5 a6 11. Be7 Kh7 12. Qh5 Kh8 - Sep 20 03:17 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e5 2. g3 Nc6 … Nb4 6. Bb5 c6 7. Ng5 Qxg3
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. Bb5 c6 7. Ng5 Qxg3 - Sep 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 10. Bg5 a6 11. Be7 Kh7 12. Qh5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 f5 9. d4 d5 10. Bg5 a6 11. Be7 Kh7 12. Qh5 - Sep 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … d5 10. Bg5 a6 11. Be7 Kh7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 f5 9. d4 d5 10. Bg5 a6 11. Be7 Kh7 - Sep 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … Ka6 16. Rb4 Ka5 17. Bb6 Ka6
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. Bb5 c6 7. Ng5 Qxg3 8. Bc4 Kd8 9. Ne6 dxe6 10. Bg5 f6 11. Bxg8 Nxc2 12. dxe5 Kc7 13. O-O-O Kb6 14. Be3 Kb5 15. Rd4 Ka6 16. Rb4 Ka5 17. Bb6 Ka6 - Sep 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g5 14. Qh5 Kh8 15. Qg6 axb5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 f5 9. d4 d5 10. Bg5 a6 11. Be7 Bxe7 12. Qh5 g6 13. Qh4 g5 14. Qh5 Kh8 15. Qg6 axb5 - Sep 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nh3 e5 2. g3 Nc6 … 15. Rd4 Ka6 16. Rb4 Ka5 17. Bb6
1. Nh3 e5 2. g3 Nc6 3. e4 Qh4 4. d4 Qg4 5. f3 Nb4 6. Bb5 c6 7. Ng5 Qxg3 8. Bc4 Kd8 9. Ne6 dxe6 10. Bg5 f6 11. Bxg8 Nxc2 12. dxe5 Kc7 13. O-O-O Kb6 14. Be3 Kb5 15. Rd4 Ka6 16. Rb4 Ka5 17. Bb6 - Sep 20 03:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. Qh4 g5 14. Qh5 Kh8 15. Qg6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 Kg8 8. Bb5 f5 9. d4 d5 10. Bg5 a6 11. Be7 Bxe7 12. Qh5 g6 13. Qh4 g5 14. Qh5 Kh8 15. Qg6