Revolution v2.74-dev-250925-tsd1

Summary

• Made the tempo bonus explicitly symmetric so both colors receive the same +10 centipawn incentive for having the move, removing the previous color-dependent bias in evaluations
• Refreshed CLI utilities so their default paths and display names use the new binary identifier across tuning, perft, match, and metrics tooling. 
• Updated Fritz/Cutechess/Fastchess harness configurations to reference the renamed executable and show the new identifier in GUI results.
• Version 2.74 introduces a new heuristic king_file_exposurethat adds up to 6 points per column and applies a weight dependent on the weighted material before combining it with the NNUE evaluation. This adjustment can shift the result by tens of centipeons, so any miscalibration aggressively penalizes open positions compared to 2.40, which delegated this evaluation to the network.
• Correction history now combines all histories into a single value, scales it by a depth-dependent factor, and reduces it by an additional 22% when it detects prior experience. It also king_file_exposurereduces or amplifies bonuses before backpropagating them, which can negate learned corrections or magnify punishments when the king is exposed.
• The experience subsystem has been rewritten to support multiple formats, convert files .bin, and merge duplicate entries, but now deletes and recreates the table on every load, stores BrainLearn headers, and shares a experienceAvailableglobal that alters history weighting even across threads that haven’t consumed data; if the file is misaligned or oversized, the table becomes empty and the experience is disabled mid-search.

SPRT

Elo: -0.52 +/- 7.45, nElo: -1.06 +/- 15.23
LOS: 44.55 %, DrawRatio: 56.90 %, PairsRatio: 0.99
Games: 2000, Wins: 501, Losses: 504, Draws: 995, Points: 998.5 (49.93 %)
Ptnml(0-2): [8, 209, 569, 206, 8], WL/DD Ratio: 0.96
LLR: -0.10 (-3.3%) (-2.94, 2.94) [0.00, 2.50]

Elo: -0.52 +/- 7.45, nElo: -1.06 +/- 15.23
LOS: 44.55 %, DrawRatio: 56.90 %, PairsRatio: 0.99
Games: 2000, Wins: 501, Losses: 504, Draws: 995, Points: 998.5 (49.93 %)
Ptnml(0-2): [8, 209, 569, 206, 8], WL/DD Ratio: 0.96
LLR: -0.10 (-3.3%) (-2.94, 2.94) [0.00, 2.50]

Elo: 8.37 +/- 15.06, nElo: 16.29 +/- 29.30 LOS: 86.20 %, DrawRatio: 52.59 %, PairsRatio: 1.25 Games: 540, Wins: 137, Losses: 124, Draws: 279, Points: 276.5 (51.20 %) Ptnml(0-2): [3, 54, 142, 69, 2], WL/DD Ratio: 0.82 LLR: 0.50 (17.0%) (-2.94, 2.94) [0.00, 10.00]

Elo: 8.37 +/- 15.06, nElo: 16.29 +/- 29.30 LOS: 86.20 %, DrawRatio: 52.59 %, PairsRatio: 1.25 Games: 540, Wins: 137, Losses: 124, Draws: 279, Points: 276.5 (51.20 %) Ptnml(0-2): [3, 54, 142, 69, 2], WL/DD Ratio: 0.82 LLR: 0.50 (17.0%) (-2.94, 2.94) [0.00, 10.00]

Elo: 4.96 +/- 26.67, nElo: 10.73 +/- 57.55 LOS: 64.26 %, DrawRatio: 61.43 %, PairsRatio: 1.08 Games: 140, Wins: 32, Losses: 30, Draws: 78, Points: 71.0 (50.71 %) Ptnml(0-2): [0, 13, 43, 13, 1], WL/DD Ratio: 0.65 LLR: 0.07 (2.3%) (-2.94, 2.94) [0.00, 10.00]

Elo: 4.96 +/- 26.67, nElo: 10.73 +/- 57.55 LOS: 64.26 %, DrawRatio: 61.43 %, PairsRatio: 1.08 Games: 140, Wins: 32, Losses: 30, Draws: 78, Points: 71.0 (50.71 %) Ptnml(0-2): [0, 13, 43, 13, 1], WL/DD Ratio: 0.65 LLR: 0.07 (2.3%) (-2.94, 2.94) [0.00, 10.00]

Elo: -0.00 +/- 15.39, nElo: 0.00 +/- 29.86 LOS: 50.00 %, DrawRatio: 52.69 %, PairsRatio: 0.98 Games: 520, Wins: 133, Losses: 133, Draws: 254, Points: 260.0 (50.00 %) Ptnml(0-2): [2, 60, 137, 58, 3], WL/DD Ratio: 1.01 LLR: -0.22 (-7.3%) (-2.94, 2.94) [0.00, 10.00]

Elo: -0.00 +/- 15.39, nElo: 0.00 +/- 29.86 LOS: 50.00 %, DrawRatio: 52.69 %, PairsRatio: 0.98 Games: 520, Wins: 133, Losses: 133, Draws: 254, Points: 260.0 (50.00 %) Ptnml(0-2): [2, 60, 137, 58, 3], WL/DD Ratio: 1.01 LLR: -0.22 (-7.3%) (-2.94, 2.94) [0.00, 10.00]

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