L2Regularization追加で

既に走破タイム学習や相対タイム学習に導入済みだったけど、ランキング学習のみ入れないのは不自然だし、Geminiが入れるべきだというので実装してみた。

NumberOfLeaves: 319
NumberOfIterations: 2000
LearningRate: 0.01
MaximumBinCountPerFeature: 127
MinimumExampleCountPerLeaf: 150
SubsampleFraction: 0.8
FeatureFraction: 0.75
L2Regularization: 1.000
CustomGains: 0～500 = 0点, 501～1000は0.95乗に0～1000点

これ10回試すと

[Loop 9] NDCG@1 = 0.7667
[Loop 9] NDCG@3 = 0.7730
[Loop 9] NDCG@5 = 0.7886
[Loop 9] NDCG@10 = 0.8494

2,610R	1点	芝(1,278R)	ダート(1,243R)	障害(89R)	8頭以下(157R)	9～12頭(665R)	13頭以上(1,788R)	多点
単勝	25.21% (73.46%)	24.96% (75.63%)	25.66% (72.43%)	22.47% (56.74%)	32.48% (68.15%)	27.82% (72.68%)	23.60% (74.22%)	55.48% (75.63%)
複勝	54.90% (77.16%)	52.90% (75.47%)	56.72% (78.90%)	58.43% (77.19%)	63.06% (85.61%)	59.40% (75.92%)	52.52% (76.88%)	89.62% (80.48%)
枠連	14.48% (81.73%)	13.51% (89.50%)	15.16% (74.27%)	17.72% (86.20%)	-- (--)	14.44% (66.24%)	13.65% (82.69%)	30.54% (78.29%)
馬連	10.54% (68.56%)	9.70% (74.37%)	11.26% (62.55%)	12.36% (68.99%)	21.66% (80.00%)	11.73% (64.74%)	9.12% (68.97%)	23.56% (72.53%)
ワイド	24.52% (74.24%)	23.08% (71.63%)	26.07% (76.54%)	23.60% (79.66%)	39.49% (69.43%)	27.82% (73.70%)	21.98% (74.87%)	46.28% (75.56%)
馬単	6.21% (62.91%)	5.56% (64.22%)	6.92% (62.17%)	5.62% (54.49%)	12.74% (72.10%)	7.37% (70.05%)	5.20% (59.45%)	23.56% (70.08%)
三連複	6.90% (105.38%)	6.49% (129.29%)	7.48% (86.37%)	4.49% (27.64%)	12.74% (72.10%)	7.67% (60.32%)	6.10% (125.07%)	16.82% (74.24%)
三連単	2.03% (135.03%)	1.56% (102.03%)	2.57% (176.43%)	1.12% (30.67%)	3.18% (93.82%)	2.56% (126.23%)	1.73% (141.92%)	16.82% (70.31%)
総合	56.90% (84.85%)	55.48% (85.19%)	58.25% (86.28%)	58.43% (59.83%)	66.24% (77.32%)	60.15% (76.23%)	54.87% (88.01%)	89.81% (72.44%)

なんか久しぶりに単勝が25%超えてきた。実はこの前にL2=0.5でも10回試したが、その時は

[Loop 3] NDCG@1 = 0.7667
[Loop 3] NDCG@3 = 0.7733
[Loop 3] NDCG@5 = 0.7887
[Loop 3] NDCG@10 = 0.8495

数値的には上だったのに

2,610R	1点	芝(1,278R)	ダート(1,243R)	障害(89R)	8頭以下(157R)	9～12頭(665R)	13頭以上(1,788R)	多点
単勝	24.29% (71.26%)	23.79% (71.73%)	24.86% (71.43%)	23.60% (62.02%)	33.12% (69.24%)	27.82% (72.86%)	22.20% (70.84%)	55.36% (76.38%)
複勝	54.90% (78.10%)	51.72% (74.89%)	57.76% (81.18%)	60.67% (81.01%)	64.33% (91.72%)	59.55% (76.35%)	52.35% (77.55%)	89.92% (81.82%)
枠連	14.01% (78.64%)	13.05% (90.02%)	14.65% (67.43%)	17.72% (89.62%)	-- (--)	13.83% (62.51%)	13.26% (80.02%)	29.90% (75.53%)
馬連	10.46% (68.40%)	9.94% (79.83%)	10.94% (57.06%)	11.24% (62.58%)	22.29% (83.25%)	11.28% (60.32%)	9.12% (70.10%)	24.02% (79.29%)
ワイド	24.41% (73.16%)	23.24% (74.00%)	25.82% (73.11%)	21.35% (61.80%)	42.04% (79.17%)	27.52% (72.05%)	21.70% (73.05%)	47.05% (78.64%)
馬単	5.48% (52.23%)	4.85% (54.19%)	6.19% (51.23%)	4.49% (37.98%)	12.10% (71.21%)	6.92% (58.57%)	4.36% (48.20%)	24.02% (76.78%)
三連複	7.16% (110.92%)	6.73% (136.72%)	7.80% (90.35%)	4.49% (27.64%)	14.65% (95.29%)	7.67% (65.58%)	6.32% (129.15%)	16.74% (72.09%)
三連単	1.69% (69.59%)	1.25% (59.54%)	2.17% (82.70%)	1.12% (30.67%)	2.55% (111.21%)	1.95% (48.17%)	1.51% (73.90%)	16.74% (70.00%)
総合	56.86% (75.24%)	54.15% (79.93%)	59.37% (71.84%)	60.67% (56.20%)	66.88% (85.87%)	60.15% (64.55%)	54.75% (77.85%)	90.08% (73.53%)

実検証では低かった。って事で、L2=1.5を40回スタートして寝ます(笑)

追記 2026.10.27 5:10

最適はNDCG@1とNDCG@10がトップの

[Loop 21] NDCG@1 = 0.7678
[Loop 21] NDCG@3 = 0.7724
[Loop 21] NDCG@5 = 0.7887
[Loop 21] NDCG@10 = 0.8495

2,610R	1点	芝(1,278R)	ダート(1,243R)	障害(89R)	8頭以下(157R)	9～12頭(665R)	13頭以上(1,788R)	多点
単勝	25.13% (74.70%)	24.33% (74.86%)	25.99% (75.24%)	24.72% (64.83%)	34.39% (74.01%)	27.97% (73.22%)	23.27% (75.31%)	56.13% (77.27%)
複勝	55.75% (79.40%)	53.05% (77.36%)	58.00% (81.20%)	62.92% (83.60%)	66.24% (95.92%)	59.70% (76.48%)	53.36% (79.03%)	90.04% (81.93%)
枠連	14.35% (79.71%)	13.24% (85.97%)	14.90% (71.27%)	21.52% (119.62%)	-- (--)	13.68% (58.84%)	13.76% (82.79%)	31.26% (81.64%)
馬連	10.38% (65.49%)	9.62% (71.72%)	10.86% (57.35%)	14.61% (89.89%)	22.29% (84.97%)	11.43% (58.72%)	8.95% (66.30%)	24.48% (78.60%)
ワイド	24.75% (73.84%)	23.40% (71.42%)	26.23% (75.95%)	23.60% (79.21%)	43.95% (84.90%)	26.92% (71.35%)	22.26% (73.80%)	46.97% (77.46%)
馬単	5.52% (53.33%)	4.93% (54.77%)	5.95% (48.99%)	7.87% (93.48%)	12.10% (80.13%)	6.92% (58.39%)	4.42% (49.10%)	24.48% (75.24%)
三連複	7.32% (110.67%)	6.89% (132.57%)	7.88% (88.94%)	5.62% (99.78%)	14.01% (65.22%)	8.42% (81.08%)	6.32% (125.67%)	16.90% (73.74%)
三連単	1.49% (80.16%)	1.10% (39.16%)	1.93% (125.85%)	1.12% (30.67%)	1.91% (24.14%)	2.26% (60.03%)	1.17% (92.56%)	16.90% (71.26%)
総合	57.59% (77.13%)	55.40% (75.79%)	59.45% (78.14%)	62.92% (82.11%)	68.79% (72.76%)	60.15% (67.27%)	55.65% (80.57%)	90.27% (74.36%)

NDCG@3がトップの

[Loop 32] NDCG@1 = 0.7658
[Loop 32] NDCG@3 = 0.7728
[Loop 32] NDCG@5 = 0.7886
[Loop 32] NDCG@10 = 0.8492

2,610R	1点	芝(1,278R)	ダート(1,243R)	障害(89R)	8頭以下(157R)	9～12頭(665R)	13頭以上(1,788R)	多点
単勝	24.52% (73.82%)	24.41% (77.75%)	24.86% (71.27%)	21.35% (53.03%)	33.76% (72.10%)	27.97% (74.93%)	22.43% (73.56%)	55.52% (75.90%)
複勝	55.02% (78.76%)	52.74% (77.43%)	56.88% (79.93%)	61.80% (81.57%)	64.97% (93.44%)	60.45% (78.45%)	52.13% (77.59%)	89.73% (81.50%)
枠連	14.31% (80.86%)	13.14% (90.30%)	14.99% (70.04%)	20.25% (112.41%)	-- (--)	13.38% (65.20%)	13.81% (81.93%)	30.75% (77.72%)
馬連	10.42% (67.42%)	9.39% (75.13%)	11.18% (58.05%)	14.61% (87.53%)	20.38% (78.41%)	11.28% (65.50%)	9.23% (67.16%)	24.02% (78.20%)
ワイド	24.18% (72.66%)	22.69% (71.90%)	25.66% (73.55%)	24.72% (71.01%)	40.13% (76.11%)	26.92% (71.65%)	21.76% (72.72%)	46.44% (77.01%)
馬単	5.59% (59.30%)	4.93% (58.90%)	6.28% (60.03%)	5.62% (54.72%)	12.10% (73.76%)	6.17% (62.30%)	4.81% (56.91%)	24.02% (75.45%)
三連複	7.09% (107.79%)	6.73% (129.70%)	7.56% (85.84%)	5.62% (99.78%)	14.65% (72.74%)	7.67% (69.56%)	6.21% (125.09%)	16.13% (69.43%)
三連単	1.80% (122.26%)	1.64% (97.79%)	2.01% (153.97%)	1.12% (30.67%)	3.18% (51.59%)	2.41% (111.47%)	1.45% (132.48%)	16.13% (67.15%)
総合	57.13% (82.88%)	55.24% (84.76%)	58.73% (81.66%)	61.80% (73.29%)	67.52% (74.02%)	61.20% (74.89%)	54.70% (85.93%)	89.85% (71.63%)

NDCG@5がトップの

[Loop 6] NDCG@1 = 0.7667
[Loop 6] NDCG@3 = 0.7727
[Loop 6] NDCG@5 = 0.7888
[Loop 6] NDCG@10 = 0.8494

2,610R	1点	芝(1,278R)	ダート(1,243R)	障害(89R)	8頭以下(157R)	9～12頭(665R)	13頭以上(1,788R)	多点
単勝	24.52% (71.32%)	23.63% (72.05%)	25.50% (71.24%)	23.60% (61.91%)	31.21% (64.20%)	26.62% (67.94%)	23.15% (73.20%)	54.90% (75.13%)
複勝	55.25% (77.85%)	52.50% (75.38%)	57.36% (79.61%)	65.17% (88.88%)	61.15% (81.21%)	60.15% (77.16%)	52.91% (77.82%)	89.62% (80.75%)
枠連	14.18% (80.11%)	13.42% (91.68%)	14.56% (67.96%)	18.99% (102.41%)	-- (--)	12.93% (58.48%)	13.81% (83.45%)	30.32% (77.89%)
馬連	10.38% (69.96%)	9.86% (78.51%)	10.86% (61.68%)	11.24% (62.81%)	22.29% (84.46%)	10.38% (55.71%)	9.34% (73.98%)	23.56% (74.22%)
ワイド	24.83% (76.28%)	23.47% (74.26%)	26.39% (79.07%)	22.47% (66.40%)	40.13% (70.76%)	27.22% (72.18%)	22.60% (78.29%)	46.25% (74.94%)
馬単	5.75% (59.02%)	5.16% (63.93%)	6.36% (54.29%)	5.62% (54.72%)	12.74% (74.90%)	6.02% (50.05%)	5.03% (60.97%)	23.56% (71.87%)
三連複	6.74% (103.61%)	6.34% (128.04%)	7.24% (83.50%)	5.62% (33.71%)	12.10% (53.63%)	7.37% (59.62%)	6.04% (124.36%)	16.70% (75.62%)
三連単	1.65% (75.19%)	1.33% (89.41%)	2.01% (63.75%)	1.12% (30.67%)	2.55% (34.33%)	1.95% (45.91%)	1.45% (89.66%)	16.70% (73.78%)
総合	57.20% (76.62%)	55.01% (84.01%)	58.89% (70.15%)	65.17% (62.12%)	64.33% (66.21%)	60.90% (60.88%)	55.20% (82.72%)	89.69% (74.52%)

つまり、どれもL2=1.0を超えない^^; 今晩はL2=1.25あたりを攻めてみるかな。