66.1M
positions
11.9M
practically solved
237.65T
engine nodes
1.8M
analyses
4,563
in queue
15
active workers
104
active cores
2.7M
nodes / sec
27.1
positions / min
83
proof number
3,835
disproof number
Root conquest: 0/20 first moves solved · 17.9% of tree positions solved · last 24h: 254,323 closures, 4.56T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 196 open obligations, of which 32 (16.3%) 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 25.1m (median of 64) · measured at 2026-09-28 23:00 UTC
Closures by source, last 24h (254211 of 254227 labelled): USER 99.8% (253591) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (620) · last 7d (1577989 of 1578085): USER 97.3% (1534773) · FILL 0.6% (8795) · AUTO 2.0% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2356). 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 … 10. c4 e5 11. Bb2 f5 12. Kf1 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 10. c4 e5 11. Bb2 f5 12. Qh5 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bh6 17. Qd1 Kh8 18. h4 Bg7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bh6 17. Qd1 Kh8 18. h4 Bd7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Bh6 17. Qd1 Kh8 18. h4 Kh7 (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 | 1100 | 2 | |
| g1h3 | unsolved | 786 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 436 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 142 | 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 | 3 | |
| 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 | BManBJ 31.2% of the fleet | 1.42T | 10,613 |
| 2 | auranvesdranor 23.2% of the fleet | 1.06T | 8,134 |
| 3 | randomchampgamer 12.8% of the fleet | 583.31B | 4,730 |
| 4 | tenzink 12.3% of the fleet | 561.86B | 3,354 |
| 5 | gannet 10.6% of the fleet | 484.85B | 891 |
| 6 | uipio 7.0% of the fleet | 317.54B | 1,518 |
| 7 | bricerichmond 1.7% of the fleet | 77.47B | 107 |
| 8 | rhaxier 0.9% of the fleet | 40.74B | 244 |
| 9 | soothdest 0.3% of the fleet | 12.60B | 95 |
| 10 | RickEdinson <0.1% of the fleet | 1.79B | 15 |
and 1 more.
11 accounts · 4.56T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.0% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.98T | 308,838 |
| 3 | BManBJ 11.9% of the fleet | 28.22T | 194,903 |
| 4 | auranvesdranor 11.5% of the fleet | 27.37T | 197,254 |
| 5 | JackIV 4.2% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.1% of the fleet | 9.80T | 71,699 |
| 7 | RickEdinson 2.7% of the fleet | 6.50T | 43,085 |
| 8 | MoNiKaMaDnEsS 1.7% of the fleet | 4.14T | 26,565 |
| 9 | NeoArcturus 1.7% of the fleet | 4.09T | 16,758 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 25 more.
35 accounts · 237.68T 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 28 23:17 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Bd8 10. b3 f4 11. Bb2 Bb6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … d5 16. Qf7 Kc6 17. Qd7 Kc5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7 Ke8 14. exf4 Kd7 15. Qf3 d5 16. Qf7 Kc6 17. Qd7 Kc5 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 15. Qf3 d5 16. Qf7 Kc6 17. Qd7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7 Ke8 14. exf4 Kd7 15. Qf3 d5 16. Qf7 Kc6 17. Qd7 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kd7 15. Qf3 d5 16. Qf7 Kc6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7 Ke8 14. exf4 Kd7 15. Qf3 d5 16. Qf7 Kc6 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. exf4 Kd7 15. Qf3 d5 16. Qf7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7 Ke8 14. exf4 Kd7 15. Qf3 d5 16. Qf7 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Ke8 14. exf4 Kd7 15. Qf3 d5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7 Ke8 14. exf4 Kd7 15. Qf3 d5 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. Bxb7 Ke8 14. exf4 Kd7 15. Qf3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7 Ke8 14. exf4 Kd7 15. Qf3 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … g6 13. Bxb7 Ke8 14. exf4 Kd7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7 Ke8 14. exf4 Kd7 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 12. Bc8 g6 13. Bxb7 Ke8 14. exf4
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7 Ke8 14. exf4 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Bb6 12. Bc8 g6 13. Bxb7 Ke8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7 Ke8 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6 13. Bxb7 - Sep 28 23:17 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … f4 11. Bb2 Bb6 12. Bc8 g6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 f5 7. e3 Be7 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 f4 11. Bb2 Bb6 12. Bc8 g6