| ⇢ | A | Sigma added |
| ⇢ | B | Backpropagation::trainSample() added | |
| ⇢ | A | Backpropagation::isResultWithinError() added | |
| ⇢ | A | Sigma::getSigmaForNeuron() added | |
| ⇢ | A | Backpropagation::__construct() added | |
| ⇢ | A | Backpropagation::trainSamples() added | |
| ⇢ | A | Backpropagation::getSigma() added | |
| ⇢ | A | Backpropagation::getPrevSigma() added | |
| ⇢ | A | Sigma::__construct() added | |
| ⇢ | A | Sigma::getSigma() added | |
| ⇢ | A | Sigma::getNeuron() added | |
| A | ↘ | B | LayeredNetwork::setInput() got worse |