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Not so trivial (Posted on 2016-03-18) Difficulty: 4 of 5
In a certain chess position, each row and each column contains an odd number of pieces.

Prove that the total number of pieces on black squares is an even number.

Source: Proizvolov, “Problems Teaching Us How to Think".

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
re(2): Parity Solution @BrianBrian Smith2016-03-24 11:44:30
Hints/Tipsre: Parity Solution @BrianAdy TZIDON2016-03-24 11:25:49
Elementary additions. armando2016-03-19 05:27:50
Answer.broll2016-03-19 01:23:15
Some ThoughtsA question.broll2016-03-19 00:50:00
SolutionParity SolutionBrian Smith2016-03-18 23:47:02
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