61.2M
positions
10.5M
practically solved
221.37T
engine nodes
1.7M
analyses
1,077
in queue
20
active workers
346
active cores
19.0M
nodes / sec
97.9
positions / min
125
proof number
3,794
disproof number
Root conquest: 0/20 first moves solved · 17.1% of tree positions solved · last 24h: 383,825 closures, 5.44T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 179 open obligations, of which 29 (16.2%) 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 4.4h (median of 76) · measured at 2026-09-25 22:00 UTC
Closures by source, last 24h (383610 of 383647 labelled): USER 98.5% (377805) · FILL 0.1% (343) · AUTO 1.4% (5192) · SOLVE 0.0% (0) · NONE 0.1% (270) · last 7d (1276150 of 1276267): USER 99.5% (1269308) · FILL 0.0% (343) · AUTO 0.4% (5192) · SOLVE 0.0% (0) · NONE 0.1% (1307). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. Nc3 d6 … Rd8 10. O-O d4 11. Kh1 a5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … g6 10. d4 Bc7 11. h3 g5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … g6 10. d4 Bc7 11. h3 Rc8 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-atomicdb#0
- 1. Nf3 f6 2. Nc3 d6 … Rd8 10. O-O Kg8 11. Be8 Rxe8 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-atomicdb#1
- 1. Nf3 f6 2. Nc3 d6 … Rd8 10. O-O Ra8 11. Be8 Kg8 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-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 | 1059 | 2 | |
| g1h3 | unsolved | 774 | 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 | NitroColoraze 79.8% of the fleet | 4.34T | 33,974 |
| 2 | BManBJ 10.5% of the fleet | 573.24B | 4,184 |
| 3 | tenzink 4.4% of the fleet | 241.50B | 1,937 |
| 4 | randomchampgamer 2.7% of the fleet | 148.82B | 1,161 |
| 5 | RickEdinson 2.0% of the fleet | 108.68B | 892 |
| 6 | rhaxier 0.4% of the fleet | 24.20B | 142 |
| 7 | soothdest 0.1% of the fleet | 2.89B | 26 |
7 accounts · 5.44T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.8% of the fleet | 83.99T | 711,580 |
| 2 | tenzink 15.9% of the fleet | 35.37T | 298,971 |
| 3 | BManBJ 11.3% of the fleet | 25.16T | 172,668 |
| 4 | auranvesdranor 11.3% of the fleet | 25.14T | 181,535 |
| 5 | JackIV 4.5% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.8% of the fleet | 8.46T | 61,299 |
| 7 | RickEdinson 2.9% of the fleet | 6.43T | 42,559 |
| 8 | NeoArcturus 1.8% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.96T | 25,268 |
| 10 | ijh 1.6% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 221.92T 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 20 proposals · see every proposal
Milestones
- Sep 25 22:55 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Bd6 12. Be8 Bc7 13. Bf7 Re8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Bb4 10. c3 Kf8 11. g3 Bd6 12. Be8 Bc7 13. Bf7 Re8 - Sep 25 22:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Bc7 13. Bf7 Re8 14. Qd3 Rd8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Bb4 10. c3 Kf8 11. g3 Bd6 12. Be8 Bc7 13. Bf7 Re8 14. Qd3 Rd8 - Sep 25 22:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 12. Be8 Bc7 13. Bf7 Re8 14. Qd3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Bb4 10. c3 Kf8 11. g3 Bd6 12. Be8 Bc7 13. Bf7 Re8 14. Qd3 - Sep 25 22:55 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 d6 … Kg8 11. O-O e5 12. Bd7 Bxc3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 g6 8. Bb5 d5 9. d4 Bb4 10. c3 Kg8 11. O-O e5 12. Bd7 Bxc3 - Sep 25 22:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Bc7 13. Bf7 Re8 14. Qe2 Rd8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Bb4 10. c3 Kf8 11. g3 Bd6 12. Be8 Bc7 13. Bf7 Re8 14. Qe2 Rd8 - Sep 25 22:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … Kf7 15. Qa3 g5 16. Qf8 Kg6
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 g6 8. Bb5 d5 9. d4 Bb4 10. c3 Kg8 11. O-O e5 12. Bd7 Bxc3 13. Bc8 a5 14. Qb3 Kf7 15. Qa3 g5 16. Qf8 Kg6 - Sep 25 22:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 12. Be8 Bc7 13. Bf7 Re8 14. Qe2
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Bb4 10. c3 Kf8 11. g3 Bd6 12. Be8 Bc7 13. Bf7 Re8 14. Qe2 - Sep 25 22:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 14. Qb3 Kf7 15. Qa3 g5 16. Qf8
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 g6 8. Bb5 d5 9. d4 Bb4 10. c3 Kg8 11. O-O e5 12. Bd7 Bxc3 13. Bc8 a5 14. Qb3 Kf7 15. Qa3 g5 16. Qf8 - Sep 25 22:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Rd7 16. Bxe6 g5 17. Qe8 Kg7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Bb4 10. c3 Kf8 11. g3 Rb8 12. Be8 Bd6 13. Bf7 Bc7 14. Qb3 Rd8 15. Qb5 Rd7 16. Bxe6 g5 17. Qe8 Kg7 - Sep 25 22:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … a5 14. Qb3 Kf7 15. Qa3 g5
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 g6 8. Bb5 d5 9. d4 Bb4 10. c3 Kg8 11. O-O e5 12. Bd7 Bxc3 13. Bc8 a5 14. Qb3 Kf7 15. Qa3 g5 - Sep 25 22:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 d6 … 13. Bc8 a5 14. Qb3 Kf7 15. Qa3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Rxh7 6. Nxc7 Kf7 7. e4 g6 8. Bb5 d5 9. d4 Bb4 10. c3 Kg8 11. O-O e5 12. Bd7 Bxc3 13. Bc8 a5 14. Qb3 Kf7 15. Qa3 - Sep 25 22:55 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 15. Qb5 Rd7 16. Bxe6 g5 17. Qe8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 d5 8. Bb5 Kf7 9. d4 Bb4 10. c3 Kf8 11. g3 Rb8 12. Be8 Bd6 13. Bf7 Bc7 14. Qb3 Rd8 15. Qb5 Rd7 16. Bxe6 g5 17. Qe8