{"action":"created","issue":{"url":"https://api.github.com/repos/gcp/leela-zero/issues/1355","repository_url":"https://api.github.com/repos/gcp/leela-zero","labels_url":"https://api.github.com/repos/gcp/leela-zero/issues/1355/labels{/name}","comments_url":"https://api.github.com/repos/gcp/leela-zero/issues/1355/comments","events_url":"https://api.github.com/repos/gcp/leela-zero/issues/1355/events","html_url":"https://github.com/gcp/leela-zero/issues/1355","id":320612954,"number":1355,"title":"FPU interaction with randomize","user":{"login":"Ttl","id":544240,"avatar_url":"https://avatars2.githubusercontent.com/u/544240?v=4","gravatar_id":"","url":"https://api.github.com/users/Ttl","html_url":"https://github.com/Ttl","followers_url":"https://api.github.com/users/Ttl/followers","following_url":"https://api.github.com/users/Ttl/following{/other_user}","gists_url":"https://api.github.com/users/Ttl/gists{/gist_id}","starred_url":"https://api.github.com/users/Ttl/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Ttl/subscriptions","organizations_url":"https://api.github.com/users/Ttl/orgs","repos_url":"https://api.github.com/users/Ttl/repos","events_url":"https://api.github.com/users/Ttl/events{/privacy}","received_events_url":"https://api.github.com/users/Ttl/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":4,"created_at":"2018-05-06T17:52:04Z","updated_at":"2018-05-06T18:56:12Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"AGZ and Facebook's ELF Go both used FPU equivalent to 0.5 in LZ, but LZ uses evaluation of parent. This difference causes big changes with the randomize option.\r\n\r\nIn this game played with ELF network: http://zero.sjeng.org/view/8a7ffd2112234f5310e70f376179f23a7259aea3a945a38a9bc9ec085a6513b2?viewer=wgo, black was leading with winrate of 99.9% but played a pass at move 159 losing the game.\r\n\r\nEvaluated moves with different FPUs for move 159:\r\n\r\n<details>\r\n <summary>FPU=parent</summary>\r\n<p>\r\n\r\n  K4 ->      54 (V: 99.80%) (N:  1.57%) PV: K4 N11 N10 O11 Q13 P13 Q14 P14 F17 G18 F18 F19\r\n O12 ->      44 (V: 99.83%) (N:  1.24%) PV: O12 O11 N11 O13 P11 N13 P13 P14 Q12 O15\r\n N12 ->      35 (V: 99.85%) (N:  0.99%) PV: N12 N13 O13 M13 O12 O15 K4 H4 H3 G4 G3 G6 F17 G18 F18 F19\r\n T12 ->      33 (V: 99.75%) (N:  1.01%) PV: T12 N11 N10 O11 K4 H4 H3 G4 G3\r\n N13 ->      30 (V: 99.82%) (N:  0.86%) PV: N13 O15 K4 O5 H5 H6 G5 D12 F17 G18 F18 F19\r\n M12 ->      29 (V: 99.81%) (N:  0.83%) PV: M12 N13 M13 K14 O13 O12 N12 O15\r\n M13 ->      29 (V: 99.81%) (N:  0.84%) PV: M13 L13 L12 N13 M12 O13 K14 O15 K13\r\n K14 ->      29 (V: 99.80%) (N:  0.85%) PV: K14 K15 K4 N11 N10 O11 M11 M12 H5 L12\r\n  K2 ->      28 (V: 99.80%) (N:  0.83%) PV: K2 N11 N10 O11 M11 M12 Q13 P13 Q14 P14 F17\r\n N10 ->      28 (V: 99.74%) (N:  0.86%) PV: N10 N12 K4 L12 M12 M11 N11 M13 O12 O13 O11 N13\r\n M11 ->      27 (V: 99.82%) (N:  0.79%) PV: M11 N12 K4 H4 H3 G4 G3 G6 F17 G18\r\n E18 ->      25 (V: 99.80%) (N:  0.73%) PV: E18 N11 N10 M12 K4 H4 H3 G4 G3 G6\r\n F17 ->      25 (V: 99.79%) (N:  0.73%) PV: F17 N11 N10 O11 K4 H4 H3 G4\r\n N11 ->      25 (V: 99.72%) (N:  0.78%) PV: N11 N13 K4 H4 H3 G4 G3 F4 F17 G18 F18 F19\r\n  C9 ->      24 (V: 99.81%) (N:  0.70%) PV: C9 D10 N12 O15 K4 H4 H3 G4 G3 F4\r\n O11 ->      24 (V: 99.80%) (N:  0.70%) PV: O11 N13 K4 H4 H3 G4 G3 G6 F17 G18 F18 F19\r\n P13 ->      24 (V: 99.79%) (N:  0.70%) PV: P13 N11 N10 Q12 N12 M12 O12\r\n K10 ->      24 (V: 99.79%) (N:  0.70%) PV: K10 N11 N10 M12 K4 H4 H3 G4 G3\r\n A12 ->      24 (V: 99.77%) (N:  0.73%) PV: A12 D12 A11 N11 N10 M12 K4 H4 H3 G4 G3 F4\r\n  J4 ->      23 (V: 99.82%) (N:  0.68%) PV: J4 K4 K2 N11 N10 O11 M11 M12 L12 M13 Q13 P13\r\n  J2 ->      23 (V: 99.78%) (N:  0.70%) PV: J2 N11 N10 O11 M11 M12 L12 M13 Q13 P13\r\n  H4 ->      23 (V: 99.78%) (N:  0.68%) PV: H4 K4 K2 N11 N10 O11 M11 M12 L12 M13\r\n Q12 ->      23 (V: 99.76%) (N:  0.72%) PV: Q12 P13 N12 O15 K4 P14 F17 G18\r\n  H2 ->      23 (V: 99.75%) (N:  0.70%) PV: H2 N11 N10 M12 Q13 P13 Q14 P14 F17 G18 F18\r\n  T3 ->      22 (V: 99.82%) (N:  0.66%) PV: T3 T4 N12 O15 K4 H4 H3 G4 G3\r\n  M2 ->      22 (V: 99.82%) (N:  0.64%) PV: M2 N11 N10 M12 Q13 P13 Q14 P14 K4\r\n H10 ->      22 (V: 99.81%) (N:  0.64%) PV: H10 G9 K4 N11 N10 O11 M11 M12 L12\r\n L12 ->      22 (V: 99.80%) (N:  0.66%) PV: L12 N11 N12 O11 N10 M13\r\n  T6 ->      21 (V: 99.80%) (N:  0.63%) PV: T6 N11 N10 O11 K4 H4 H3 G4 G3\r\n  L2 ->      21 (V: 99.79%) (N:  0.64%) PV: L2 N11 N10 M12 Q13 P13 Q14 P14 Q15\r\n A11 ->      21 (V: 99.76%) (N:  0.62%) PV: A11 D12 A12 N11 N10 M12 K4 H4 H3\r\n  G2 ->      21 (V: 99.62%) (N:  0.64%) PV: G2 K4 K2 N11 N10 M12 Q13 P13 Q14\r\n  D8 ->      20 (V: 99.83%) (N:  0.59%) PV: D8 K4 K2 J2 H2 H3 J1 J4\r\n  G4 ->      20 (V: 99.80%) (N:  0.58%) PV: G4 K4 K2 J2 H2 J4 J1 H3\r\n Q13 ->      20 (V: 99.79%) (N:  0.60%) PV: Q13 P13 Q14 P14 K4 N11 N10 M11 O11 O12\r\n  F2 ->      20 (V: 99.79%) (N:  0.59%) PV: F2 N11 N10 M12 K4 H10 H12 G10 Q13\r\n P11 ->      20 (V: 99.79%) (N:  0.60%) PV: P11 N11 N10 O12 Q12 P13 K4 H4 H3 G4 G3\r\n F18 ->      20 (V: 99.77%) (N:  0.62%) PV: F18 F17 E18 G18 K4 N11 N10\r\n  G9 ->      20 (V: 99.76%) (N:  0.61%) PV: G9 G8 H10 H8 K4 N11 N10 O11 Q13\r\n L13 ->      20 (V: 99.75%) (N:  0.60%) PV: L13 M13 M12 N13 K4 H4 H3 G4\r\n C18 ->      19 (V: 99.82%) (N:  0.57%) PV: C18 N11 N10 O11 K4 L12 H5 H10 H12\r\n H14 ->      19 (V: 99.82%) (N:  0.56%) PV: H14 K4 K2 J2 H2 J4 J1 N11\r\n  O5 ->      19 (V: 99.81%) (N:  0.56%) PV: O5 O6 K4 N11 N10 O11 M11 M12\r\n  A8 ->      19 (V: 99.79%) (N:  0.58%) PV: A8 N11 N10 K4 K2 J2 H2 H3 J1\r\n  O1 ->      19 (V: 99.75%) (N:  0.58%) PV: O1 N11 N10 M12 K4 H4 H3 G4 G3\r\n  G6 ->      19 (V: 99.75%) (N:  0.58%) PV: G6 K4 K2 J4 H3 N11 N10 O11\r\n G18 ->      19 (V: 99.73%) (N:  0.60%) PV: G18 F17 F18 F16 E17 N11 N10\r\n P10 ->      19 (V: 99.71%) (N:  0.60%) PV: P10 N11 N10 N12 K4 H4 H3 G4 G3 G6 F17\r\n E10 ->      19 (V: 99.68%) (N:  0.61%) PV: E10 D10 K4 N11 N10 O11 M11 M12 L12\r\n  H3 ->      18 (V: 99.79%) (N:  0.53%) PV: H3 K4 K2 N11 N10 O11 M11 M12 L12 M13\r\n  Q2 ->      18 (V: 99.74%) (N:  0.56%) PV: Q2 N11 N10 M12 K4 H4 H3 G4\r\n H12 ->      18 (V: 99.73%) (N:  0.56%) PV: H12 N11 N10 M12 K4 H4 H3 G4 G3 F4\r\n  H5 ->      18 (V: 99.72%) (N:  0.57%) PV: H5 K4 K2 J4 H3 H4 G4 G5 G6\r\n  P2 ->      18 (V: 99.72%) (N:  0.57%) PV: P2 N11 N10 O11 K4 H4 H3 G4\r\n  G8 ->      18 (V: 99.69%) (N:  0.58%) PV: G8 G9 G7 F7 G6 F6 G5 F5 G4\r\n  H7 ->      18 (V: 99.68%) (N:  0.58%) PV: H7 G6 G9 G8 H8 H6 H10 K4 K2 J2 H2\r\n  C8 ->      17 (V: 99.82%) (N:  0.49%) PV: C8 K4 K2 J2 H2 H3 J1 J4\r\n  S2 ->      17 (V: 99.82%) (N:  0.48%) PV: S2 N11 N10 M12 K4 H4 H3 G4 G3 G6\r\n  N5 ->      17 (V: 99.79%) (N:  0.51%) PV: N5 N11 N10 O11 M11 M12 K4 H4 H3\r\n G10 ->      17 (V: 99.78%) (N:  0.53%) PV: G10 N11 N10 O11 K4 H4 H3 G4\r\n  T2 ->      17 (V: 99.78%) (N:  0.51%) PV: T2 N11 N10 O11 K4 H4 H3 G4\r\n S13 ->      17 (V: 99.77%) (N:  0.51%) PV: S13 N11 N10 O11 K4 H4 H3 G4 G3\r\n S14 ->      17 (V: 99.75%) (N:  0.51%) PV: S14 S15 K4 N11 N10 O11 M11 M12 L12 M13 Q13\r\n J14 ->      17 (V: 99.74%) (N:  0.54%) PV: J14 K14 N12 N13 O13 M13 O12\r\n  P9 ->      17 (V: 99.74%) (N:  0.52%) PV: P9 P8 N12 N13 O13 M13 O12 O15 K4 H4\r\n K13 ->      17 (V: 99.74%) (N:  0.53%) PV: K13 K14 N12 N13 O13 M13 O12 O15\r\n  B2 ->      17 (V: 99.74%) (N:  0.53%) PV: B2 N11 N10 M12 K4 H4 H3 G4\r\n J13 ->      17 (V: 99.73%) (N:  0.54%) PV: J13 N11 N10 M12 K4 H4 H3 G4 G3 G6\r\n P14 ->      17 (V: 99.69%) (N:  0.53%) PV: P14 N11 N10 Q13 N12 M12 N13 O11\r\n  Q1 ->      17 (V: 99.66%) (N:  0.56%) PV: Q1 N11 N10 M12 K4 H4 H3 G4\r\n  G3 ->      17 (V: 99.64%) (N:  0.58%) PV: G3 N11 N10 O11 K4 L12 F17 H10 H12 G10\r\n  S8 ->      16 (V: 99.82%) (N:  0.48%) PV: S8 N11 N10 L12 K4 O11 Q13 P13 Q14\r\n  O2 ->      16 (V: 99.79%) (N:  0.47%) PV: O2 N11 N10 M12 K4 H4 H3\r\n R13 ->      16 (V: 99.79%) (N:  0.48%) PV: R13 Q13 N12 N13 O13 M13 O12\r\n C16 ->      16 (V: 99.78%) (N:  0.49%) PV: C16 N11 N10 O11 Q13 P13 Q14 P14\r\n G16 ->      16 (V: 99.78%) (N:  0.48%) PV: G16 K4 K2 J2 H2 H3 J1 J4\r\n T13 ->      16 (V: 99.76%) (N:  0.49%) PV: T13 N11 N10 M12 Q13 P13 Q14 P14\r\n A13 ->      16 (V: 99.76%) (N:  0.49%) PV: A13 N11 N10 M12 K4 H4 H3 G4 G3\r\n D18 ->      16 (V: 99.76%) (N:  0.49%) PV: D18 N11 N10 O11 K4 L12 Q13 P13 Q14\r\n  B7 ->      16 (V: 99.75%) (N:  0.50%) PV: B7 N11 N10 M12 K4 O11 Q13 P13\r\n  F3 ->      16 (V: 99.72%) (N:  0.50%) PV: F3 N11 N10 O11 K4 L12 Q13 P13 Q14\r\n  K1 ->      16 (V: 99.71%) (N:  0.50%) PV: K1 N11 N10 O11 M11 M12 Q13 P13\r\n  J5 ->      16 (V: 99.71%) (N:  0.50%) PV: J5 H5 K4 N11 N10 O11 M11 M12 L12\r\n  R1 ->      16 (V: 99.69%) (N:  0.50%) PV: R1 N11 N10 O11 K4 L12 F17\r\n  L5 ->      16 (V: 99.69%) (N:  0.52%) PV: L5 J4 K4 H3 K2 N11 N10\r\n  G7 ->      16 (V: 99.62%) (N:  0.53%) PV: G7 H7 G8 H8 G9 E10 N12\r\n H13 ->      16 (V: 99.62%) (N:  0.54%) PV: H13 N11 N10 M12 K4 H4 H3 G4\r\n O13 ->      16 (V: 99.59%) (N:  0.54%) PV: O13 N11 O11 O12 N12 M12 N13\r\n N16 ->      16 (V: 99.44%) (N:  0.61%) PV: N16 N13 M13 L13 M12 O13\r\n  G5 ->      15 (V: 99.82%) (N:  0.45%) PV: G5 N11 N10 O11 K4 H5 H4 G6 F6\r\n  E1 ->      15 (V: 99.77%) (N:  0.45%) PV: E1 N11 N10 M12 K4 H10 H12 G10\r\n P15 ->      15 (V: 99.77%) (N:  0.47%) PV: P15 N11 N10 O11 Q13 P13 Q14\r\n  S1 ->      15 (V: 99.76%) (N:  0.44%) PV: S1 N11 N10 O11 K4 L12 F17 G18\r\n  A7 ->      15 (V: 99.76%) (N:  0.47%) PV: A7 N11 N10 O11 M11 M12 K4 H4\r\n  R2 ->      15 (V: 99.75%) (N:  0.48%) PV: R2 N11 N10 O11 K4 L12 Q13\r\n  B4 ->      15 (V: 99.75%) (N:  0.46%) PV: B4 N11 N10 O11 K4 H4 H3 G4\r\n G13 ->      15 (V: 99.74%) (N:  0.45%) PV: G13 N11 N10 M12 K4 H4 H3 G4\r\n G15 ->      15 (V: 99.74%) (N:  0.48%) PV: G15 N11 N10 O11 K4 H4 H3 G4 G3\r\n  H1 ->      15 (V: 99.74%) (N:  0.46%) PV: H1 N11 N10 O11 M11 M12 Q13 P13\r\n  T9 ->      15 (V: 99.73%) (N:  0.46%) PV: T9 N11 N10 L12 M11 M12 N12 N13 O11\r\n Q14 ->      15 (V: 99.73%) (N:  0.48%) PV: Q14 Q13 O12 O11 N11 O13 N13\r\n  P8 ->      15 (V: 99.72%) (N:  0.46%) PV: P8 P9 N12 N13 O13 M13 O12\r\n  J1 ->      15 (V: 99.72%) (N:  0.48%) PV: J1 N11 N10 O11 Q13 P13 Q14 P14\r\n  M1 ->      15 (V: 99.68%) (N:  0.50%) PV: M1 N11 N10 O11 M11 M12 Q13 P13 Q14\r\n O18 ->      15 (V: 99.67%) (N:  0.50%) PV: O18 N11 N10 O11\r\n  N1 ->      15 (V: 99.66%) (N:  0.49%) PV: N1 N11 N10 O11 M11 M12 K4 H4 H3\r\n O15 ->      15 (V: 99.53%) (N:  0.55%) PV: O15 N12 K14 K15 M13 L13\r\n  E8 ->      14 (V: 99.80%) (N:  0.41%) PV: E8 K4 K2 N11 N10 M12 Q13 P13\r\n E17 ->      14 (V: 99.79%) (N:  0.43%) PV: E17 N11 N10 O11 K4 H4 H3 G4 G3 F4 T3\r\n E15 ->      14 (V: 99.78%) (N:  0.41%) PV: E15 N11 N10 O11 K4 H4 H3 G4\r\n  B6 ->      14 (V: 99.78%) (N:  0.43%) PV: B6 N11 N10 M12 K4 H4 H3 G4\r\n B17 ->      14 (V: 99.77%) (N:  0.43%) PV: B17 N11 N10 L12 M11 M12 N12 N13 O11\r\n  L1 ->      14 (V: 99.75%) (N:  0.42%) PV: L1 N11 N10 M12 Q13 P13 Q14 P14 F17\r\n A14 ->      14 (V: 99.75%) (N:  0.43%) PV: A14 N11 N10 M12 K4 H4 H3 G4 G3\r\n  E2 ->      14 (V: 99.74%) (N:  0.43%) PV: E2 N11 N10 M12 K4 H10 H12 G10 F17\r\n  G1 ->      14 (V: 99.74%) (N:  0.45%) PV: G1 N11 N10 O11 K4 M11 Q13\r\n E11 ->      14 (V: 99.72%) (N:  0.44%) PV: E11 E10 O12 O15 K4 H4 H3 G4\r\n B18 ->      14 (V: 99.71%) (N:  0.46%) PV: B18 N11 N10 M12 K4 H4 H3 G4\r\n  H8 ->      14 (V: 99.69%) (N:  0.46%) PV: H8 G8 N12 O15 K4 H4 H3\r\n D10 ->      14 (V: 99.45%) (N:  0.54%) PV: D10 D12 E10 C9 D9 C8 D8 C7\r\n F19 ->      13 (V: 99.81%) (N:  0.39%) PV: F19 N11 N10 O11 K4 H4 H3 G4 G3 G6\r\n  E7 ->      13 (V: 99.80%) (N:  0.39%) PV: E7 K4 K2 J2 H2 H3 J1 J4 J2\r\n  D5 ->      13 (V: 99.80%) (N:  0.38%) PV: D5 N11 N10 M12 K4 H4 H3 G4 G3 G6\r\n  C1 ->      13 (V: 99.80%) (N:  0.39%) PV: C1 N11 N10 M12 K4 H4 H3\r\n F16 ->      13 (V: 99.79%) (N:  0.39%) PV: F16 N11 N10 O11 K4 M11 H10 G9\r\n  F6 ->      13 (V: 99.76%) (N:  0.39%) PV: F6 K4 K2 N11 N10 M12 Q13 P13 Q14\r\n H15 ->      13 (V: 99.76%) (N:  0.41%) PV: H15 K15 K4 N11 N10 O11 M11\r\n  E4 ->      13 (V: 99.76%) (N:  0.39%) PV: E4 N11 N10 O11 K4 L12 Q13 P13 Q14\r\n  C2 ->      13 (V: 99.76%) (N:  0.42%) PV: C2 N11 N10 O11 M11 M12 K4 L12\r\n  C4 ->      13 (V: 99.75%) (N:  0.41%) PV: C4 N11 N10 M12 K4 H4 H3\r\n  B5 ->      13 (V: 99.75%) (N:  0.42%) PV: B5 N11 N10 M12 K4 H4 H3\r\n  C3 ->      13 (V: 99.72%) (N:  0.41%) PV: C3 N11 N10 O11 K4 L12 Q13 P13 Q14\r\n G14 ->      13 (V: 99.71%) (N:  0.43%) PV: G14 G15 K4 N11 N10 M12 Q13 P13 Q14\r\n  D9 ->      13 (V: 99.69%) (N:  0.43%) PV: D9 E10 K4 N11 N10 O11 Q13\r\n K16 ->      13 (V: 99.66%) (N:  0.45%) PV: K16 K17 N12 N11 O11 N13\r\n A16 ->      13 (V: 99.64%) (N:  0.44%) PV: A16 N11 N10 M12 Q13 P13 Q14\r\n  H6 ->      13 (V: 99.64%) (N:  0.44%) PV: H6 H5 G6 H7 K4 J4\r\n  B3 ->      13 (V: 99.53%) (N:  0.49%) PV: B3 N11 N10 O11 M11 M12 K4 L12\r\n  L4 ->      13 (V: 99.49%) (N:  0.47%) PV: L4 K4 K2 J4 H3 N11 N10 M12 Q13 P13\r\n  F7 ->      12 (V: 99.78%) (N:  0.37%) PV: F7 G7 N12 O15 K4 H4 H3 G5 F4\r\n  F4 ->      12 (V: 99.76%) (N:  0.37%) PV: F4 K4 K2 J4 H3 N11 N10 O11\r\n  D7 ->      12 (V: 99.75%) (N:  0.38%) PV: D7 N11 N10 O11 K4 H4\r\n H19 ->      12 (V: 99.73%) (N:  0.39%) PV: H19 N11 N10 K4 K2 J2 H2 H3 J1\r\n  A5 ->      12 (V: 99.73%) (N:  0.38%) PV: A5 N11 N10 O11 K4 H4 H3 G4\r\n A17 ->      12 (V: 99.73%) (N:  0.40%) PV: A17 N11 N10 O11 Q13 P13 Q14 P14\r\n  K5 ->      12 (V: 99.71%) (N:  0.39%) PV: K5 K4 L5 J4 J5\r\n  F9 ->      12 (V: 99.70%) (N:  0.39%) PV: F9 G8 O12 N11 O11 N13 O13 N10 M11\r\n L18 ->      12 (V: 99.69%) (N:  0.39%) PV: L18 N11 N10 K4 K2 J2 H2 J4\r\n  O7 ->      12 (V: 99.67%) (N:  0.38%) PV: O7 O6 K4 N11 N10 O11 M11\r\n A15 ->      12 (V: 99.65%) (N:  0.39%) PV: A15 N11 N10 O11 M11 M12 K4 H4\r\n  T4 ->      12 (V: 99.63%) (N:  0.40%) PV: T4 T3 O12 O15 K4 H4 H3\r\n  C7 ->      11 (V: 99.77%) (N:  0.33%) PV: C7 N11 N10 K4 K2 J2 H2 J4\r\n T14 ->      11 (V: 99.76%) (N:  0.36%) PV: T14 N11 N10 M12 K4 H4 H3 G4 G3\r\n  F1 ->      11 (V: 99.74%) (N:  0.33%) PV: F1 N11 N10 M12 Q13 P13 Q14\r\n  E5 ->      11 (V: 99.74%) (N:  0.35%) PV: E5 N11 N10 O11 K4 H4 H3 G5 G4\r\n  D6 ->      11 (V: 99.74%) (N:  0.36%) PV: D6 N11 N10 O11 M11 M12 K4 H4\r\n  D3 ->      11 (V: 99.73%) (N:  0.34%) PV: D3 N11 N10 M12 Q13 P13 Q14\r\n  A6 ->      11 (V: 99.73%) (N:  0.34%) PV: A6 N11 N10 M12 Q13 P13 Q14\r\n G19 ->      11 (V: 99.72%) (N:  0.34%) PV: G19 N11 N10 O11 K4 L12 F17 H10\r\n  A4 ->      11 (V: 99.71%) (N:  0.35%) PV: A4 N11 N10 M12 K4 H4 H3 G4\r\n M18 ->      11 (V: 99.71%) (N:  0.35%) PV: M18 N11 N10 M12 K4 H4 H3 G4 G3\r\n  F5 ->      11 (V: 99.70%) (N:  0.36%) PV: F5 N11 N10 O11 M11 M12 K4 L12\r\n  D1 ->      11 (V: 99.70%) (N:  0.36%) PV: D1 N11 N10 M12 K4 H4 H3\r\n  M3 ->      11 (V: 99.69%) (N:  0.37%) PV: M3 N11 N10 M12 K4 H4 H3\r\n R19 ->      11 (V: 99.68%) (N:  0.36%) PV: R19 N11 N10 M12 K4 H4 H3\r\n  B1 ->      11 (V: 99.68%) (N:  0.35%) PV: B1 N11 N10 O11 K4 L12 Q13\r\n H18 ->      11 (V: 99.64%) (N:  0.36%) PV: H18 N11 N10 M12 K4 H4 H3 G4\r\n G17 ->      11 (V: 99.64%) (N:  0.38%) PV: G17 G18 F18 F17 E18 G16 N12 O15 K4\r\n  O6 ->      11 (V: 99.56%) (N:  0.39%) PV: O6 O5 N5 O7 K4 N11\r\n N18 ->      11 (V: 99.51%) (N:  0.41%) PV: N18 N11 N10 O11 Q13 P13 Q14 P14\r\n C19 ->      11 (V: 99.48%) (N:  0.41%) PV: C19 N11 N10 L12 K4 O11 Q13 P13\r\n O19 ->      11 (V: 99.46%) (N:  0.41%) PV: O19 N11 N10 M12 K4 H4 H3\r\n D19 ->      10 (V: 99.80%) (N:  0.29%) PV: D19 N11 N10 K4 K2 J2 H2 H3\r\n  C5 ->      10 (V: 99.78%) (N:  0.31%) PV: C5 N11 N10 O11 K4 M11\r\n  P5 ->      10 (V: 99.76%) (N:  0.31%) PV: P5 N11 N10 M12 K4 H4 H3 G4 G3 F4\r\n  A2 ->      10 (V: 99.73%) (N:  0.33%) PV: A2 N11 N10 L12 M11 M12 N12 O11\r\n A19 ->      10 (V: 99.73%) (N:  0.32%) PV: A19 N11 N10 M12 K4 H4 H3 G4\r\n  A3 ->      10 (V: 99.69%) (N:  0.34%) PV: A3 N11 N10 O11 M11 M12 Q13\r\n K15 ->      10 (V: 99.67%) (N:  0.33%) PV: K15 K14 O12 O11 N11 O13\r\n E19 ->       9 (V: 99.79%) (N:  0.29%) PV: E19 N11 N10 K4 K2 J2 H2\r\n T15 ->       9 (V: 99.77%) (N:  0.29%) PV: T15 N11 N10 M12 K4 H4\r\n B19 ->       9 (V: 99.73%) (N:  0.30%) PV: B19 N11 N10 L12 M11 M12 N12 N13 O11\r\n R16 ->       9 (V: 99.71%) (N:  0.28%) PV: R16 N11 N10 M12 K4 H4 H3 G4\r\n Q15 ->       9 (V: 99.67%) (N:  0.31%) PV: Q15 Q14 O12 O15 K4 P14\r\n  T1 ->       9 (V: 99.66%) (N:  0.30%) PV: T1 N11 N10 M12 K4 H4\r\n S15 ->       9 (V: 99.65%) (N:  0.32%) PV: S15 S14 O12 O15 K4 P14 P13 Q13\r\n K17 ->       9 (V: 99.62%) (N:  0.32%) PV: K17 N11 N10 O11 K4 H4\r\n N19 ->       9 (V: 99.55%) (N:  0.33%) PV: N19 N11 N10 M12 K4 H4 H3\r\n J18 ->       9 (V: 99.44%) (N:  0.36%) PV: J18 N11 N10 L12 M11\r\n P16 ->       9 (V: 99.32%) (N:  0.35%) PV: P16 N12 Q13 P13 Q14 P14\r\n R15 ->       8 (V: 99.77%) (N:  0.26%) PV: R15 S14 O12 O15 K4 H4 H3 G4\r\n D17 ->       8 (V: 99.76%) (N:  0.27%) PV: D17 N11 N10 O11 K4 L12\r\npass ->       8 (V: 99.76%) (N:  0.25%) PV: pass N11 N10 M12 K4 H4 H3\r\n S18 ->       8 (V: 99.74%) (N:  0.27%) PV: S18 N11 N10 M12 K4 H4 H3 G4\r\n N17 ->       8 (V: 99.56%) (N:  0.31%) PV: N17 N11 N10 M12 K4\r\n P18 ->       8 (V: 99.53%) (N:  0.29%) PV: P18 N11 N10 M12 K4 H4\r\n S17 ->       8 (V: 99.49%) (N:  0.32%) PV: S17 N11 N10 O11 Q13 P13\r\n M19 ->       8 (V: 99.47%) (N:  0.32%) PV: M19 N11 N10 O11 M11 M12\r\n T16 ->       7 (V: 99.76%) (N:  0.23%) PV: T16 N11 N10 M12 K4 H4 H3\r\n T17 ->       7 (V: 99.72%) (N:  0.23%) PV: T17 N11 N10 K4 K2 J2 H2\r\n S19 ->       7 (V: 99.66%) (N:  0.23%) PV: S19 N11 N10 O11 K4 H4 H3\r\n T18 ->       7 (V: 99.60%) (N:  0.22%) PV: T18 N11 N10 M12 K4 H4\r\n T19 ->       7 (V: 99.50%) (N:  0.23%) PV: T19 N11 N10 M12 K4 H4\r\n P19 ->       7 (V: 99.35%) (N:  0.30%) PV: P19 N11 N10 M12 K4\r\n J11 ->       2 (V: 97.63%) (N:  0.15%) PV: J11 L12\r\n5.7 average depth, 17 max depth\r\n2521 non leaf nodes, 1.27 average children\r\n3200 visits, 642386 nodes, 3199 playouts, 10 n/s\r\n\r\n</p>\r\n</details>\r\n\r\n<details>\r\n <summary>FPU=0.5</summary>\r\n<p>\r\n\r\n  K4 ->    2807 (V: 99.89%) (N:  1.39%) PV: K4 N11 N10 F17\r\n N12 ->     199 (V: 99.89%) (N:  1.18%) PV: N12 F6\r\n O12 ->     193 (V: 99.89%) (N:  1.14%) PV: O12 H7\r\n4.6 average depth, 5 max depth\r\n409 non leaf nodes, 7.82 average children\r\n3200 visits, 645382 nodes, 3199 playouts, 10 n/s\r\n\r\n</p>\r\n</details>\r\n\r\nParent evaluated practically every move while 0.5 evaluates only the favorite moves of the network. The big difference is that when FPU is 0.5 the winning side plays practically no blunders.\r\n\r\nIf commit https://github.com/gcp/leela-zero/commit/0c8cd6aa3bc88d119100192191a6b7e148cb5126 is removed the resulting visit distribution looks much more sane and the games aren't lost to random blunders anymore:\r\n\r\n<details>\r\n <summary>FPU=parent, reduction</summary>\r\n<p>\r\n\r\n N12 ->    1639 (V: 99.89%) (N:  1.77%) PV: N12 O15 K4 J18\r\n O12 ->     724 (V: 99.88%) (N:  1.54%) PV: O12 O15 K4 H5\r\n  K4 ->     425 (V: 99.86%) (N:  1.26%) PV: K4 N11 N10 M11\r\n M13 ->     411 (V: 99.85%) (N:  1.28%) PV: M13 L13 L12 D10\r\n4.3 average depth, 5 max depth\r\n1159 non leaf nodes, 2.76 average children\r\n3200 visits, 645278 nodes, 3199 playouts, 10 n/s\r\n\r\n</p>\r\n</details>\r\n\r\nThis might also be interesting to Leela chess people. @Error323 @killerducky "},"comment":{"url":"https://api.github.com/repos/gcp/leela-zero/issues/comments/386903942","html_url":"https://github.com/gcp/leela-zero/issues/1355#issuecomment-386903942","issue_url":"https://api.github.com/repos/gcp/leela-zero/issues/1355","id":386903942,"user":{"login":"jkiliani","id":33714573,"avatar_url":"https://avatars2.githubusercontent.com/u/33714573?v=4","gravatar_id":"","url":"https://api.github.com/users/jkiliani","html_url":"https://github.com/jkiliani","followers_url":"https://api.github.com/users/jkiliani/followers","following_url":"https://api.github.com/users/jkiliani/following{/other_user}","gists_url":"https://api.github.com/users/jkiliani/gists{/gist_id}","starred_url":"https://api.github.com/users/jkiliani/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jkiliani/subscriptions","organizations_url":"https://api.github.com/users/jkiliani/orgs","repos_url":"https://api.github.com/users/jkiliani/repos","events_url":"https://api.github.com/users/jkiliani/events{/privacy}","received_events_url":"https://api.github.com/users/jkiliani/received_events","type":"User","site_admin":false},"created_at":"2018-05-06T18:56:12Z","updated_at":"2018-05-06T18:56:12Z","author_association":"NONE","body":"I did actually get the impression that the ELF net plays weaker than it should when behind a lot, in our new self-play games: http://zero.sjeng.org/view/85c845898810bc5ccdb3cb0daa8306c298240a9211ea53c18435000c6d099a4a?viewer=wgo\r\n\r\nMy hypothesis for the cause is that our method of tree search does not work very well when all candidate moves are evaluated as basically certain losses, or certain wins. Is this assessment correct or is there another reason?"}}
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