TD(lambda), and a big rework

NOTE: 6x6 weights are as-yet untrained

On the performance side:
* switch from linked-list chaining hash table to direct mapping
* cache check_win by hash
* persist transposition tables across plies (this was a big deal and difficult to puzzle out)
* add align directives to the network floats
* prepare_nn_input gained a small LUT to avoid branching (i suppose you might call this 1D embedding)
* apply mtune=native for the native builds

On the correctness side:
* Zobrist has now includes the ply parity
* the network now predicts something in [-1, 1] using tanh (approximated by polynomials)
* the training object is now MSE because we're learning a value estimate
* use .clangd instead of compile_commands.json

On the training side:
* completely forgo human-derived data set
* implement td(lambda), self-play, tournaments

1 files changed, 0 insertions, 59 deletions

diff --git a/include/tt_llcht.h b/include/tt_llcht.h
deleted file mode 100644
index dc73d26..0000000
--- a/include/tt_llcht.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
-  This file is part of ct.
-
-  This program is free software: you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation, either version 3 of the License, or
-  (at your option) any later version.
-
-  This program is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with ct. If not, see <https://www.gnu.org/licenses/>.
-*/
-
-#ifndef TT_LLCHT_H
-#define TT_LLCHT_H
-
-#include <stdint.h>
-#include <stdlib.h>
-
-#include <actions.h>
-
-// ===================================================================
-// Types
-// ===================================================================
-
-enum TT_FLAG { TT_EXACT, TT_LOWERBOUND, TT_UPPERBOUND };
-
-typedef struct tt_node_s {
-  uint64_t key;
-  struct tt_node_s *next;
-  enum TT_FLAG flag;
-  uint8_t depth;
-  float value;
-  action_t action;
-} tt_entry_t;
-
-// ===================================================================
-// Variables
-// ===================================================================
-
-#define TT_LLCHT_SIZE ((uint32_t)((1 << 19) - 1))
-
-// ===================================================================
-// Methods
-// ===================================================================
-
-int tt_init(void);
-void tt_free(void);
-
-tt_entry_t *tt_seek(const uint64_t key);
-
-int tt_insert(const uint64_t key, const enum TT_FLAG flag, const uint8_t depth,
-              const float value, const action_t action);
-
-#endif