diff --git a/tig-algorithms/src/vector_search/is_adp_optimal/README.md b/tig-algorithms/src/vector_search/is_adp_optimal/README.md
new file mode 100644
index 0000000..81793ad
--- /dev/null
+++ b/tig-algorithms/src/vector_search/is_adp_optimal/README.md
@@ -0,0 +1,23 @@
+# TIG Code Submission
+
+    ## Submission Details
+
+    * **Challenge Name:** vector_search
+    * **Submission Name:** is_adp_optimal
+    * **Copyright:** 2025 OptimusMaximus
+    * **Identity of Submitter:** OptimusMaximus
+    * **Identity of Creator of Algorithmic Method:** null
+    * **Unique Algorithm Identifier (UAI):** null
+
+    ## License
+
+    The files in this folder are under the following licenses:
+    * TIG Benchmarker Outbound License
+    * TIG Commercial License
+    * TIG Inbound Game License
+    * TIG Innovator Outbound Game License
+    * TIG Open Data License
+    * TIG THV Game License
+
+    Copies of the licenses can be obtained at:  
+    https://github.com/tig-foundation/tig-monorepo/tree/main/docs/licenses
\ No newline at end of file
diff --git a/tig-algorithms/src/vector_search/is_adp_optimal/kernels.cu b/tig-algorithms/src/vector_search/is_adp_optimal/kernels.cu
new file mode 100644
index 0000000..9254627
--- /dev/null
+++ b/tig-algorithms/src/vector_search/is_adp_optimal/kernels.cu
@@ -0,0 +1,323 @@
+/*!
+Copyright 2025 OptimusMaximus
+
+Identity of Submitter OptimusMaximus
+
+UAI null
+
+Licensed under the TIG Inbound Game License v2.0 or (at your option) any later
+version (the "License"); you may not use this file except in compliance with the
+License. You may obtain a copy of the License at
+
+https://github.com/tig-foundation/tig-monorepo/tree/main/docs/licenses
+
+Unless required by applicable law or agreed to in writing, software distributed
+under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
+language governing permissions and limitations under the License.
+*/
+
+#include <cuda_runtime.h>
+#include <float.h>
+
+#define MAX_FLOAT 3.402823466e+38F
+
+__device__ float euclidean_distance(const float* a, const float* b, int dims) {
+    float sum = 0.0f;
+    int i;
+    for (i = 0; i < dims - 3; i += 4) {
+        float diff0 = a[i] - b[i];
+        float diff1 = a[i+1] - b[i+1];
+        float diff2 = a[i+2] - b[i+2];
+        float diff3 = a[i+3] - b[i+3];
+        sum = fmaf(diff0, diff0, sum);
+        sum = fmaf(diff1, diff1, sum);
+        sum = fmaf(diff2, diff2, sum);
+        sum = fmaf(diff3, diff3, sum);
+    }
+    for (; i < dims; i++) {
+        float diff = a[i] - b[i];
+        sum = fmaf(diff, diff, sum);
+    }
+    return sum;
+}
+
+__device__ float euclidean_distance_high(const float* a, const float* b, int dims) {
+    float sum = 0.0f;
+    for (int i = 0; i < dims; i += 4) {
+        float diff0 = a[i] - b[i];
+        float diff1 = a[i+1] - b[i+1];
+        float diff2 = a[i+2] - b[i+2];
+        float diff3 = a[i+3] - b[i+3];
+        sum = fmaf(diff0, diff0, sum);
+        sum = fmaf(diff1, diff1, sum);
+        sum = fmaf(diff2, diff2, sum);
+        sum = fmaf(diff3, diff3, sum);
+    }
+    return sum;
+}
+
+extern "C" __global__ void deterministic_clustering(
+    const float* database_vectors,
+    float* cluster_centers,
+    int* cluster_assignments,
+    int* cluster_sizes,
+    int database_size,
+    int vector_dims,
+    int num_clusters,
+    int num_queries
+) {
+    int cluster_idx = blockIdx.x;
+    int tid = threadIdx.x;
+    
+    if (cluster_idx >= num_clusters) return;
+    
+    extern __shared__ float shared_mem[];
+    float* center = shared_mem;
+    
+    for (int d = tid; d < vector_dims; d += blockDim.x) {
+        center[d] = 0.0f;
+    }
+    __syncthreads();
+    
+    int seed_idx = ((cluster_idx * 982451653LL + 1566083941LL) % (long long)database_size);
+    const float* seed_vector = database_vectors + seed_idx * vector_dims;
+    
+    for (int d = tid; d < vector_dims; d += blockDim.x) {
+        center[d] = seed_vector[d];
+        cluster_centers[cluster_idx * vector_dims + d] = seed_vector[d];
+    }
+    
+    if (tid == 0) {
+        cluster_sizes[cluster_idx] = 0;
+    }
+    __syncthreads();
+    
+    for (int vec_idx = tid; vec_idx < database_size; vec_idx += blockDim.x) {
+        const float* vector = database_vectors + vec_idx * vector_dims;
+        
+        float min_dist = MAX_FLOAT;
+        int best_cluster = 0;
+        
+        for (int c = 0; c < num_clusters; c++) {
+            const float* c_center = cluster_centers + c * vector_dims;
+            float dist = (num_queries <= 4000) ? 
+                euclidean_distance(vector, c_center, vector_dims) :
+                euclidean_distance_high(vector, c_center, vector_dims);
+            if (dist < min_dist) {
+                min_dist = dist;
+                best_cluster = c;
+            }
+        }
+        
+        cluster_assignments[vec_idx] = best_cluster;
+        if (best_cluster == cluster_idx) {
+            atomicAdd(&cluster_sizes[cluster_idx], 1);
+        }
+    }
+}
+
+extern "C" __global__ void cluster_search(
+    const float* query_vectors,
+    const float* database_vectors,
+    const float* cluster_centers,
+    const int* cluster_assignments,
+    const int* cluster_sizes,
+    int* results,
+    int num_queries,
+    int database_size,
+    int vector_dims,
+    int num_clusters
+) {
+    if (num_queries <= 4000) {
+        int query_idx = blockIdx.x;
+        if (query_idx >= num_queries) return;
+        
+        const float* query = query_vectors + query_idx * vector_dims;
+        
+        float cluster_dists[8];
+        for (int i = 0; i < num_clusters; i++) {
+            cluster_dists[i] = MAX_FLOAT;
+        }
+        
+        float best_dist[3] = {MAX_FLOAT, MAX_FLOAT, MAX_FLOAT};
+        int best_clusters[3] = {-1, -1, -1};
+        
+        for (int cluster = 0; cluster < num_clusters; cluster++) {
+            const float* center = cluster_centers + cluster * vector_dims;
+            float dist = euclidean_distance(query, center, vector_dims);
+            
+            cluster_dists[cluster] = dist;
+            
+            if (dist < best_dist[0]) {
+                best_dist[2] = best_dist[1];
+                best_clusters[2] = best_clusters[1];
+                best_dist[1] = best_dist[0];
+                best_clusters[1] = best_clusters[0];
+                best_dist[0] = dist;
+                best_clusters[0] = cluster;
+            } else if (dist < best_dist[1]) {
+                best_dist[2] = best_dist[1];
+                best_clusters[2] = best_clusters[1];
+                best_dist[1] = dist;
+                best_clusters[1] = cluster;
+            } else if (dist < best_dist[2]) {
+                best_dist[2] = dist;
+                best_clusters[2] = cluster;
+            }
+        }
+        
+        float min_dist = MAX_FLOAT;
+        int best_idx = -1;
+        
+        int target_cluster = best_clusters[0];
+        if (target_cluster != -1 && cluster_sizes[target_cluster] > 0) {
+            for (int vec_idx = 0; vec_idx < database_size; vec_idx++) {
+                if (cluster_assignments[vec_idx] == target_cluster) {
+                    const float* db_vector = database_vectors + vec_idx * vector_dims;
+                    float dist = euclidean_distance(query, db_vector, vector_dims);
+                    if (dist < min_dist) {
+                        min_dist = dist;
+                        best_idx = vec_idx;
+                    }
+                }
+            }
+        }
+        
+        if (best_clusters[1] != -1 && cluster_sizes[best_clusters[1]] > 0) {
+            target_cluster = best_clusters[1];
+            for (int vec_idx = 0; vec_idx < database_size; vec_idx++) {
+                if (cluster_assignments[vec_idx] == target_cluster) {
+                    const float* db_vector = database_vectors + vec_idx * vector_dims;
+                    float dist = euclidean_distance(query, db_vector, vector_dims);
+                    if (dist < min_dist) {
+                        min_dist = dist;
+                        best_idx = vec_idx;
+                    }
+                }
+            }
+        }
+        
+        if (best_clusters[2] != -1 && cluster_sizes[best_clusters[2]] > 0) {
+            target_cluster = best_clusters[2];
+            for (int vec_idx = 0; vec_idx < database_size; vec_idx++) {
+                if (cluster_assignments[vec_idx] == target_cluster) {
+                    const float* db_vector = database_vectors + vec_idx * vector_dims;
+                    float dist = euclidean_distance(query, db_vector, vector_dims);
+                    if (dist < min_dist) {
+                        min_dist = dist;
+                        best_idx = vec_idx;
+                    }
+                }
+            }
+        }
+        
+        for (int cluster = 0; cluster < num_clusters; cluster++) {
+            if (cluster == best_clusters[0] || cluster == best_clusters[1] || cluster == best_clusters[2]) continue;
+            if (cluster_sizes[cluster] == 0) continue;
+            
+            for (int vec_idx = 0; vec_idx < database_size; vec_idx++) {
+                if (cluster_assignments[vec_idx] == cluster) {
+                    const float* db_vector = database_vectors + vec_idx * vector_dims;
+                    float dist = euclidean_distance(query, db_vector, vector_dims);
+                    if (dist < min_dist) {
+                        min_dist = dist;
+                        best_idx = vec_idx;
+                    }
+                }
+            }
+        }
+        
+        results[query_idx] = best_idx;
+    } else {
+        int query_idx = blockIdx.x * blockDim.x + threadIdx.x;
+        if (query_idx >= num_queries) return;
+        
+        const float* query = query_vectors + query_idx * vector_dims;
+        
+        extern __shared__ float shared_mem[];
+        float* cluster_dists = shared_mem;
+        int* cluster_indices = (int*)&shared_mem[num_clusters];
+        
+        if (threadIdx.x < num_clusters) {
+            cluster_dists[threadIdx.x] = MAX_FLOAT;
+            cluster_indices[threadIdx.x] = -1;
+        }
+        
+        float best_dist[2] = {MAX_FLOAT, MAX_FLOAT};
+        int best_clusters[2] = {-1, -1};
+        
+        for (int cluster = 0; cluster < num_clusters; cluster++) {
+            const float* center = cluster_centers + cluster * vector_dims;
+            float dist = euclidean_distance_high(query, center, vector_dims);
+            
+            if (dist < best_dist[0]) {
+                best_dist[1] = best_dist[0];
+                best_clusters[1] = best_clusters[0];
+                best_dist[0] = dist;
+                best_clusters[0] = cluster;
+            } else if (dist < best_dist[1]) {
+                best_dist[1] = dist;
+                best_clusters[1] = cluster;
+            }
+            
+            if (cluster < num_clusters && threadIdx.x == 0) {
+                cluster_dists[cluster] = dist;
+            }
+        }
+        
+        float min_dist = MAX_FLOAT;
+        int best_idx = -1;
+        
+        int target_cluster = best_clusters[0];
+        if (target_cluster != -1 && cluster_sizes[target_cluster] > 0) {
+            for (int vec_idx = 0; vec_idx < database_size; vec_idx++) {
+                if (cluster_assignments[vec_idx] == target_cluster) {
+                    const float* db_vector = database_vectors + vec_idx * vector_dims;
+                    float dist = euclidean_distance_high(query, db_vector, vector_dims);
+                    if (dist < min_dist) {
+                        min_dist = dist;
+                        best_idx = vec_idx;
+                    }
+                }
+            }
+        }
+        
+        if (min_dist == MAX_FLOAT && best_clusters[1] != -1 && cluster_sizes[best_clusters[1]] > 0) {
+            target_cluster = best_clusters[1];
+            for (int vec_idx = 0; vec_idx < database_size; vec_idx++) {
+                if (cluster_assignments[vec_idx] == target_cluster) {
+                    const float* db_vector = database_vectors + vec_idx * vector_dims;
+                    float dist = euclidean_distance_high(query, db_vector, vector_dims);
+                    if (dist < min_dist) {
+                        min_dist = dist;
+                        best_idx = vec_idx;
+                    }
+                }
+            }
+        }
+        
+        if (min_dist == MAX_FLOAT) {
+            float search_radius = cluster_dists[0] * 2.0f;
+            
+            for (int cluster = 0; cluster < num_clusters; cluster++) {
+                if (cluster == best_clusters[0] || cluster == best_clusters[1]) continue;
+                if (cluster_dists[cluster] >= search_radius) continue;
+                if (cluster_sizes[cluster] == 0) continue;
+                
+                for (int vec_idx = 0; vec_idx < database_size; vec_idx++) {
+                    if (cluster_assignments[vec_idx] == cluster) {
+                        const float* db_vector = database_vectors + vec_idx * vector_dims;
+                        float dist = euclidean_distance_high(query, db_vector, vector_dims);
+                        if (dist < min_dist) {
+                            min_dist = dist;
+                            best_idx = vec_idx;
+                        }
+                    }
+                }
+            }
+        }
+        
+        results[query_idx] = best_idx;
+    }
+}
diff --git a/tig-algorithms/src/vector_search/is_adp_optimal/mod.rs b/tig-algorithms/src/vector_search/is_adp_optimal/mod.rs
new file mode 100644
index 0000000..9c4bcef
--- /dev/null
+++ b/tig-algorithms/src/vector_search/is_adp_optimal/mod.rs
@@ -0,0 +1,102 @@
+use cudarc::{
+    driver::{safe::LaunchConfig, CudaModule, CudaStream, PushKernelArg},
+    runtime::sys::cudaDeviceProp,
+};
+use std::sync::Arc;
+use serde_json::{Map, Value};
+use tig_challenges::vector_search::*;
+
+pub fn solve_challenge(
+    challenge: &Challenge,
+    save_solution: &dyn Fn(&Solution) -> anyhow::Result<()>,
+    hyperparameters: &Option<Map<String, Value>>,
+    module: Arc<CudaModule>,
+    stream: Arc<CudaStream>,
+    _prop: &cudaDeviceProp,
+) -> anyhow::Result<()> {
+    let vector_dims = challenge.vector_dims as i32;
+    let database_size = challenge.database_size as i32;
+    let num_queries = challenge.difficulty.num_queries as i32;
+    
+    let block_size = 128;
+    let num_clusters = if num_queries <= 6000 {
+        2
+    } else if num_queries < 9000 {
+        4
+    } else if num_queries < 10000 {
+        6    
+    } else if num_queries < 11000  {
+        10
+    }  else if num_queries < 12000  {
+        12
+    }  else if num_queries < 14000  {
+        14
+    } else {
+        14
+    };
+    
+    let deterministic_clustering = module.load_function("deterministic_clustering")?;
+    let cluster_search = module.load_function("cluster_search")?;
+    
+    let mut d_cluster_centers = stream.alloc_zeros::<f32>((num_clusters * vector_dims) as usize)?;
+    let mut d_cluster_assignments = stream.alloc_zeros::<i32>(database_size as usize)?;
+    let mut d_cluster_sizes = stream.alloc_zeros::<i32>(num_clusters as usize)?;
+    
+    let cluster_config = LaunchConfig {
+        grid_dim: (num_clusters as u32, 1, 1),
+        block_dim: (block_size, 1, 1),
+        shared_mem_bytes: (vector_dims * 4) as u32,
+    };
+    
+    unsafe {
+        stream.launch_builder(&deterministic_clustering)
+            .arg(&challenge.d_database_vectors)
+            .arg(&mut d_cluster_centers)
+            .arg(&mut d_cluster_assignments)
+            .arg(&mut d_cluster_sizes)
+            .arg(&database_size)
+            .arg(&vector_dims)
+            .arg(&num_clusters)
+            .arg(&num_queries)
+            .launch(cluster_config)?;
+    }
+    stream.synchronize()?;
+    
+    let mut d_results = stream.alloc_zeros::<i32>(num_queries as usize)?;
+    
+    let search_config = if num_queries <= 4000 {
+        LaunchConfig {
+            grid_dim: (num_queries as u32, 1, 1),
+            block_dim: (1, 1, 1),
+            shared_mem_bytes: 0,
+        }
+    } else {
+        LaunchConfig {
+            grid_dim: (num_queries as u32, 1, 1),
+            block_dim: (block_size, 1, 1),
+            shared_mem_bytes: (num_clusters * 8) as u32,
+        }
+    };
+    
+    unsafe {
+        stream.launch_builder(&cluster_search)
+            .arg(&challenge.d_query_vectors)
+            .arg(&challenge.d_database_vectors)
+            .arg(&d_cluster_centers)
+            .arg(&d_cluster_assignments)
+            .arg(&d_cluster_sizes)
+            .arg(&mut d_results)
+            .arg(&num_queries)
+            .arg(&database_size)
+            .arg(&vector_dims)
+            .arg(&num_clusters)
+            .launch(search_config)?;
+    }
+    stream.synchronize()?;
+
+    let indices = stream.memcpy_dtov(&d_results)?;
+    let indexes = indices.iter().map(|&idx| idx as usize).collect();
+    
+    let _ = save_solution(&Solution { indexes });
+    return Ok(());
+}
diff --git a/tig-algorithms/src/vector_search/mod.rs b/tig-algorithms/src/vector_search/mod.rs
index ae3472a..59dfa3a 100644
--- a/tig-algorithms/src/vector_search/mod.rs
+++ b/tig-algorithms/src/vector_search/mod.rs
@@ -132,7 +132,8 @@
 
 // c004_a067
 
-// c004_a068
+pub mod is_adp_optimal;
+pub use is_adp_optimal as c004_a068;
 
 // c004_a069