Fixed a bug: Pi output in tensorflow is incorrect (missing softmax la… #215
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Softmax crossentropy expects logits in tensorflow, so softmax should not be applied to pi directly. |
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In othello.tensorflow.OthelloNNet.py:
The pi output of the model is
self.pi = Dense(s_fc2, self.action_size)(line 36)which is incorrect. In fact, it should be
self.pi = tf.nn.softmax(Dense(s_fc2, self.action_size)).By contrast, the implementation in Keras is correct. In othello.keras.OthelloNNet.py:
self.pi = Dense(self.action_size, activation='softmax', name='pi')(s_fc2)(line 28).