64.4M
positions
11.4M
practically solved
231.05T
engine nodes
1.8M
analyses
3,405
in queue
9
active workers
48
active cores
8.6M
nodes / sec
14.8
positions / min
125
proof number
3,794
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 463,331 closures, 6.34T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 189 open obligations, of which 30 (15.9%) 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 4.6h (median of 127) · measured at 2026-09-27 08:00 UTC
Closures by source, last 24h (463331 of 463331 labelled): USER 92.9% (430446) · FILL 1.7% (7997) · AUTO 5.2% (23963) · SOLVE 0.0% (0) · NONE 0.2% (925) · last 7d (1315752 of 1315761): USER 96.7% (1272913) · FILL 0.7% (8795) · AUTO 2.4% (32065) · SOLVE 0.0% (0) · NONE 0.2% (1979). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. g3 h6 2. Nf3 e5 3. d4 Nc6 4. e4 f5 5. Bh3 Ke7 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Nc6 10. Nbxd6 e6 11. c3 b5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Nc6 10. Nbxd6 e6 11. c3 Be7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Nc6 10. Nbxd6 e6 11. c3 Bb4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … Nc6 10. Nbxd6 e6 11. c3 a5 (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 | 1009 | 2 | |
| g1h3 | unsolved | 693 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 183 | 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 | -301 | 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 | NitroColoraze 58.8% of the fleet | 3.73T | 20,105 |
| 2 | BManBJ 11.8% of the fleet | 747.72B | 4,914 |
| 3 | auranvesdranor 11.1% of the fleet | 704.98B | 4,196 |
| 4 | tenzink 9.2% of the fleet | 582.73B | 3,293 |
| 5 | randomchampgamer 6.1% of the fleet | 388.49B | 2,775 |
| 6 | MoNiKaMaDnEsS 2.8% of the fleet | 179.59B | 1,297 |
| 7 | RandomMatrix 0.2% of the fleet | 10.11B | 76 |
7 accounts · 6.34T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 39.1% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.11T | 303,404 |
| 3 | BManBJ 11.2% of the fleet | 25.97T | 178,093 |
| 4 | auranvesdranor 11.2% of the fleet | 25.84T | 185,731 |
| 5 | JackIV 4.4% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.8% of the fleet | 8.87T | 64,281 |
| 7 | RickEdinson 2.8% of the fleet | 6.50T | 43,070 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.14T | 26,565 |
| 9 | NeoArcturus 1.8% of the fleet | 4.09T | 16,756 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 231.15T 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 21 proposals · see every proposal
Milestones
- Sep 27 08:57 Solved: WHITE_WIN via MINIMAXview
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 - Sep 27 08:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Qa5 7. Nd8 c5 8. Qf5 Ke8
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 5. Ng5 Kd7 6. Ne6 Qa5 7. Nd8 c5 8. Qf5 Ke8 - Sep 27 08:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 6. Ne6 Qa5 7. Nd8 c5 8. Qf5
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 5. Ng5 Kd7 6. Ne6 Qa5 7. Nd8 c5 8. Qf5 - Sep 27 08:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Kd7 6. Ne6 Qa5 7. Nd8 c5
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 5. Ng5 Kd7 6. Ne6 Qa5 7. Nd8 c5 - Sep 27 08:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 5. Ng5 Kd7 6. Ne6 Qa5 7. Nd8
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 5. Ng5 Kd7 6. Ne6 Qa5 7. Nd8 - Sep 27 08:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Nf6 5. Ng5 Kd7 6. Ne6 Qa5
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 5. Ng5 Kd7 6. Ne6 Qa5 - Sep 27 08:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 4. Qd3 Nf6 5. Ng5 Kd7 6. Ne6
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 5. Ng5 Kd7 6. Ne6 - Sep 27 08:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 5. Ng5 Kd7
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 5. Ng5 Kd7 - Sep 27 08:57 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 5. Ng5
1. Nh3 d5 2. Nc3 h6 3. d4 c6 4. Qd3 Nf6 5. Ng5 - Sep 27 08:57 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … a5 11. Na3 h4 12. f4 fxe4
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 b5 10. Nxh8 a5 11. Na3 h4 12. f4 fxe4 - Sep 27 08:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bf5 19. gxf5 d5 20. Qf7 Kd6
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 b5 10. Nxh8 a5 11. Na3 h4 12. f4 fxe4 13. O-O Bh6 14. g4 Bxg5 15. f5 e5 16. fxg6 e4 17. Rf8 Ke7 18. Qf1 Bf5 19. gxf5 d5 20. Qf7 Kd6 - Sep 27 08:57 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Qf1 Bf5 19. gxf5 d5 20. Qf7
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 b5 10. Nxh8 a5 11. Na3 h4 12. f4 fxe4 13. O-O Bh6 14. g4 Bxg5 15. f5 e5 16. fxg6 e4 17. Rf8 Ke7 18. Qf1 Bf5 19. gxf5 d5 20. Qf7