![]() What size board for pieces I like (or have) (49.5 mm) squares board with around 2.5 mm clearance. In the photo below my Plastic set of 3.79/1.46 King, 2.96/1.41 Queen, 2.56/1.22 Bishop fits tightly on my 1.95 in. Therefore, my set’s Bishop base of 1.22 is less than 1.30 and is acceptable with a clearance of 0.08 in (2 mm). = 1.30 is the Maximum Bishop Diameter acceptable (Max Bd) Testing for bishop easy sliding between K and Q: King at “House of Chess” that is the best match for my board. I looked at different chess pieces and found a Monarch Staunton 3 ¾ in. But, how much of a clearance you like is a matter of personal preference.Įxample 1 (Choosing pieces for my 49.5 mm (1.95 in.) board): In other words, your Bishop’s base should be approximately 2 to 5 mm smaller than the maximum space available ( MaxBd). In actual chess playing, I have found that a clearance of at least 2 to 5 mm is practical. This is the diagonal space available between King and Queen. In other words you need to first find the diagonal length of one of your squares (C= √ (2A²) ) and then subtract from that half of the King’s base diameter (Kd/2) and half of the Queen’s base diameter (Qd). Applying the Pythagoras theorem you get c=√ (a²+b²), which in our case is also c= √ (2a²) since the sides of a square are equal.īd is the Bishop base diameter, or the Rook’s, or the Knight’s (whichever has the broadest base). Where c = Diagonal line of your board square. Max Bd = The largest diameter of the bishop base to fit to your board. Here is an equation illustrating the mathematical method I used in order to follow the Jonas’ method: What I did was to first apply Loubalch’s proportions to pieces I liked, and then use the old and trusted Pythagorean formula together with some simple geometrics to make sure my pieces will not bump into each other while playing. The situation that is most common is the need to know if the pieces of a set for sale which is not yet available for you to handle is a good fit to your board. Žnidaršič’s method you would need to use the dimensions (base diameter) of the three pieces with the broadest base on the set you are considering, jointly with your board dimensions. For example, Bishop between K and Q, or Q between K and Rook. ![]() What Jonas video shows is that the bishop or the fatter of your other pieces (beside K and Q) should be able to slide between the two other bigger pieces. Jonas Žnidaršič, which helped me in the end with the correct sizing of all my pieces In some cases, however, I found that my bishops would bump into my bigger pieces when sliding into play. I did of course follow the very good advice from “Loubalch” found in this forum regarding King and Pawn proportions (.765. I recently found myself selecting chess pieces for a 49.5 mm (1.95 in.) squares board I already had. What size pieces for a board I already have
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