64.4M
positions
11.4M
practically solved
231.05T
engine nodes
1.8M
analyses
3,279
in queue
9
active workers
48
active cores
8.7M
nodes / sec
14.4
positions / min
125
proof number
3,794
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 465,077 closures, 6.32T 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 (465077 of 465077 labelled): USER 92.9% (432181) · FILL 1.7% (7997) · AUTO 5.2% (23963) · SOLVE 0.0% (0) · NONE 0.2% (936) · last 7d (1316532 of 1316532): USER 96.7% (1273689) · FILL 0.7% (8795) · AUTO 2.4% (32065) · SOLVE 0.0% (0) · NONE 0.2% (1983). 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 Bb4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … c5 14. g3 h4 15. Qd2 cxd4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … c5 14. g3 h4 15. Qd2 Nb4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … c5 14. g3 h4 15. Qd2 Nc7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … c5 14. g3 h4 15. Qd2 fxe4 (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 | 976 | 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 59.1% of the fleet | 3.74T | 20,346 |
| 2 | BManBJ 11.6% of the fleet | 732.48B | 4,793 |
| 3 | auranvesdranor 11.1% of the fleet | 700.88B | 4,166 |
| 4 | tenzink 9.2% of the fleet | 578.89B | 3,290 |
| 5 | randomchampgamer 6.0% of the fleet | 382.35B | 2,727 |
| 6 | MoNiKaMaDnEsS 2.8% of the fleet | 179.59B | 1,297 |
| 7 | RandomMatrix 0.2% of the fleet | 10.11B | 76 |
7 accounts · 6.32T 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 | 36.10T | 303,365 |
| 3 | BManBJ 11.2% of the fleet | 25.96T | 177,972 |
| 4 | auranvesdranor 11.2% of the fleet | 25.84T | 185,701 |
| 5 | JackIV 4.4% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.8% of the fleet | 8.87T | 64,233 |
| 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 · 231.12T 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 08:42 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … d5 11. O-O Ba3 12. bxa3 b6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … h3 17. g3 Kh7 18. Qf8 e5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5 14. Qd3 h4 15. Bf8 Rxe8 16. Qa3 h3 17. g3 Kh7 18. Qf8 e5 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 16. Qa3 h3 17. g3 Kh7 18. Qf8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5 14. Qd3 h4 15. Bf8 Rxe8 16. Qa3 h3 17. g3 Kh7 18. Qf8 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rxe8 16. Qa3 h3 17. g3 Kh7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5 14. Qd3 h4 15. Bf8 Rxe8 16. Qa3 h3 17. g3 Kh7 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Bf8 Rxe8 16. Qa3 h3 17. g3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5 14. Qd3 h4 15. Bf8 Rxe8 16. Qa3 h3 17. g3 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … h4 15. Bf8 Rxe8 16. Qa3 h3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5 14. Qd3 h4 15. Bf8 Rxe8 16. Qa3 h3 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 14. Qd3 h4 15. Bf8 Rxe8 16. Qa3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5 14. Qd3 h4 15. Bf8 Rxe8 16. Qa3 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … h5 14. Qd3 h4 15. Bf8 Rxe8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5 14. Qd3 h4 15. Bf8 Rxe8 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 13. Ba3 h5 14. Qd3 h4 15. Bf8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5 14. Qd3 h4 15. Bf8 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … b6 13. Ba3 h5 14. Qd3 h4
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5 14. Qd3 h4 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 12. bxa3 b6 13. Ba3 h5 14. Qd3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5 14. Qd3 - Sep 27 08:42 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Ba3 12. bxa3 b6 13. Ba3 h5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 Be7 8. Bb5 Kf8 9. Be8 Kg8 10. d4 d5 11. O-O Ba3 12. bxa3 b6 13. Ba3 h5