Returns the upper bound of this child node's bound.

Finds a margin for switching to classical evaluation if it falls outside alpha-beta window with this margin.

TuneEntry::computeEvalGradient() computes gradient of params for this tune entry based on loss function of eval. The gradient is not normalized.

TuneEntry::computeMoveScoreGradient() computes gradient of params for this tune entry based on loss function of move score. The gradient is not normal

Compute the Cpuct exploration factor for the given parent node visits.

Get the normalized policy in [0,1] of current move. Use after enable normalized policy.

Get the device string of a onnx device enum.

Margin for double singular extension

Compute depth extension from statScore of current move.

Extract PV of the given node recursively. @param node The node to extract PV. @param pv[out] The extracted PV will be appended to this array. @param m

Fail high reduction margin

Find all pseudo defence pos of FOUR pattern4. @param side Color of side with a FOUR pattern4.

Find the node with the given hash key. @return Pointer to the node if found, otherwise nullptr. @note This function uses reader lock to ensure thread-

Move count based pruning. When we already have a non-losing move, and opponent is not making a four at last step, moves that exceeds futility move cou

Generate opening move for (almost) empty board state. @param[in] board Board state to probe a opening move. @param[in] rule The rule including game ru

Get the default device of this machine.

Returns the evaluated utility value of this node.

getThreadIdToNodeMapping() build once-per-process vector that maps every logical processor ID (0 … onlineCPUCount-1, enumerated in [group, number] ord

Returns the total virtual visits of this node.

* Obtains an array for a given key. */

* Obtains a table_array for a given key, if possible. */

* @brief Get the number of threads in the pool. * * @return The number of threads. */

Whether this movepicker computes normalized policy score.

Increase the current generation (aging all entries in the table).

Init Reductions table according to num threads.

Init zobrish table using PRNG with the given seed. @param seed Seed of PRNG.

Checks if we are in analysis mode.

Check if the pos is in the region of current board size.

Check whether a move is killer at this ply.

Check if the given instruction type is the minimal length on this platform.

Check if a transform type is applicable to rectangle.

Returns if this node is terminal.

helpers

* Whether or not the table array is declared inline. This mostly * matters for parsing, where statically defined arrays cannot be * appended

* Determines if the given TOML element is a value. */

Move importance regarding to game ply. The curve is made from pure experience, better to be tuned with statistical data.