Revolution 2.70 vs 2.40 — 2000-game SPRT/Fixed-N analysis

Table of Contents

Revolution 2.70 vs 2.40 — 2000-game analysis

Time control 10+0.1 · Threads=1 · Hash=32 · UHO_2024_8mvs_+085_+094.pgn · Paired per line

Headline

Overall: 617–591–792 (2000 games) → score 0.506 (≈ +4.5 Elo, LOS 77%). Draw rate 39.6%.

Color split (DEV): White 584–29–387 → 0.777, Black 33–562–405 → 0.235. Extreme white/black skew remains.

Summary

Metric	Value
Total games (DEV)	2000
Overall score	0.506
As White (W-L-D, score)	584-29-387, 0.777
As Black (W-L-D, score)	33-562-405, 0.235

BayesElo / Ordo

BayesElo excerpt:

Rank Name                          Elo    +    - games score oppo. draws
   1 revolution_2.70_210925          2    7    7  2000   51%    -2   40%
   2 revolution-dev_v2.40_130925    -2    7    7  2000   49%     2   40%

Ordo excerpt:

# PLAYER                         :  RATING  POINTS  PLAYED   (%)
   1 revolution_2.70_210925         :  3704.6  1013.0    2000    51
   2 revolution-dev_v2.40_130925    :  3700.0   987.0    2000    49

White advantage = 0.00
Draw rate (equal opponents) = 50.00 %

DEV as Black — ECO coverage

All ECO stats (Black)

ECO	Side	Games	Score
A40	B	77	0.279221
B06	B	52	0.201923
A45	B	44	0.170455
A04	B	39	0.294872
A05	B	34	0.220588
B00	B	34	0.279412
B12	B	31	0.112903
A41	B	29	0.310345
A46	B	27	0.277778
B01	B	25	0.240000
A56	B	21	0.333333
A00	B	17	0.147059
B07	B	17	0.264706
B22	B	15	0.200000
A80	B	15	0.333333
A44	B	13	0.115385
B40	B	13	0.269231
A43	B	13	0.307692
C02	B	12	0.208333
C10	B	12	0.250000
B10	B	12	0.291667
B30	B	12	0.333333
A10	B	11	0.136364
D02	B	11	0.272727
A13	B	9	0.222222
A30	B	9	0.277778
A57	B	9	0.277778
C00	B	8	0.062500
C40	B	8	0.312500
A20	B	8	0.375000
A48	B	7	0.000000
A81	B	7	0.214286
C16	B	7	0.214286
A07	B	6	0.166667
E00	B	6	0.166667
A16	B	6	0.250000
D15	B	6	0.250000
A53	B	6	0.333333
B50	B	6	0.333333
C03	B	6	0.333333
B42	B	5	0.000000
A18	B	5	0.100000
A50	B	5	0.100000
D30	B	5	0.100000
B28	B	5	0.200000
B51	B	5	0.300000
B52	B	5	0.300000
B27	B	5	0.500000
A52	B	4	0.000000
B20	B	4	0.000000
B23	B	4	0.000000
B43	B	4	0.000000
B56	B	4	0.000000
A09	B	4	0.125000
B90	B	4	0.125000
C25	B	4	0.125000
D10	B	4	0.125000
A06	B	4	0.250000
A25	B	4	0.250000
A27	B	4	0.250000
C15	B	4	0.250000
C41	B	4	0.250000
B04	B	4	0.375000
B32	B	4	0.375000
E12	B	4	0.375000
E70	B	4	0.375000
E71	B	4	0.375000
A01	B	4	0.500000
A11	B	4	0.500000
B09	B	3	0.000000
B13	B	3	0.000000
C65	B	3	0.000000
A21	B	3	0.166667
A22	B	3	0.166667
B05	B	3	0.166667
B31	B	3	0.166667
C01	B	3	0.166667
C04	B	3	0.166667
C11	B	3	0.166667
C23	B	3	0.166667
C45	B	3	0.166667
B03	B	3	0.333333
B29	B	3	0.333333
C42	B	3	0.333333
D11	B	3	0.333333
D31	B	3	0.333333
D80	B	3	0.333333
E10	B	3	0.333333
E11	B	3	0.333333
E15	B	3	0.333333
B08	B	3	0.500000
B15	B	3	0.500000
B41	B	3	0.500000
C50	B	3	0.500000
C36	B	2	0.000000
C63	B	2	0.000000
C64	B	2	0.000000
D21	B	2	0.000000
D35	B	2	0.000000
E60	B	2	0.000000
E73	B	2	0.000000
A15	B	2	0.250000
C17	B	2	0.250000
C26	B	2	0.250000
C29	B	2	0.250000
C33	B	2	0.250000
C44	B	2	0.250000
C46	B	2	0.250000
C48	B	2	0.250000
C60	B	2	0.250000
C70	B	2	0.250000
D00	B	2	0.250000
D12	B	2	0.250000
D32	B	2	0.250000
E44	B	2	0.250000
A65	B	2	0.500000
B02	B	2	0.500000
B21	B	2	0.500000
C05	B	2	0.500000
C18	B	2	0.500000
A02	B	1	0.000000
A03	B	1	0.000000
A17	B	1	0.000000
A23	B	1	0.000000
A29	B	1	0.000000
A34	B	1	0.000000
A42	B	1	0.000000
A49	B	1	0.000000
A58	B	1	0.000000
A82	B	1	0.000000
A83	B	1	0.000000
B16	B	1	0.000000
B18	B	1	0.000000
B47	B	1	0.000000
B48	B	1	0.000000
B54	B	1	0.000000
B80	B	1	0.000000
B91	B	1	0.000000
C22	B	1	0.000000
C43	B	1	0.000000
D06	B	1	0.000000
D08	B	1	0.000000
D20	B	1	0.000000
D53	B	1	0.000000
E01	B	1	0.000000
E20	B	1	0.000000
E35	B	1	0.000000
E38	B	1	0.000000
E46	B	1	0.000000
E76	B	1	0.000000
E80	B	1	0.000000
E82	B	1	0.000000
E87	B	1	0.000000
E90	B	1	0.000000
A08	B	1	0.500000
A85	B	1	0.500000
B45	B	1	0.500000
B93	B	1	0.500000
C07	B	1	0.500000
C13	B	1	0.500000
C47	B	1	0.500000
D07	B	1	0.500000
D09	B	1	0.500000
D91	B	1	0.500000
E32	B	1	0.500000
E40	B	1	0.500000
E45	B	1	0.500000
E81	B	1	0.500000
B33	B	1	1.000000

Worst ECOs (DEV as Black)

Minimum 10 games per ECO. Sorted by average score ascending.

ECO	Side	Games	Score
B12	B	31	0.112903
A44	B	13	0.115385
A10	B	11	0.136364
A00	B	17	0.147059
A45	B	44	0.170455
B22	B	15	0.200000
B06	B	52	0.201923
C02	B	12	0.208333
A05	B	34	0.220588
B01	B	25	0.240000
C10	B	12	0.250000
B07	B	17	0.264706
B40	B	13	0.269231
D02	B	11	0.272727
A46	B	27	0.277778

Use this list to A/B code changes on the most problematic families first.

Method & reproducibility

Engines: revolution_2.70_210925 vs revolution-dev_v2.40_130925
Book: UHO_2024_8mvs_+085_+094.pgn, order=sequential, -repeat, -games 2
Runner: CuteChess-CLI (fixed-N); FastChess used for SPRT in separate runs
Analysis generated automatically from the match PGN and BayesElo/Ordo outputs.

CSV exports:

Revolution_2.70_210925 SPRT 2K 10s+0.1