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• “In that case I’ll take your knight…”
• “You’re sure?”
• “Yes.”
• “Of course I could do this…”
• “Indeed.”
• “We’d swap knights…”1

How curious to think about all the unspoken pacts occurring during a chess game: continuous social contracts between players (exchanges, deprivations with long-term objectives, revocable deaths, domains’ negotiation and so on). On the chessboard’s grid the pieces move and interact, attack and defend.

In Haim Steinbach’s work one can recognize such potential movement within a Cartesian logic, but as in ideal games, the rules are not set: “each move makes …