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ch10.asciidoc

@@ -916,12 +916,12 @@ Hard forks can be used to change the rules of consensus, but they require coordi
 
 Let's examine the mechanics of a hard fork with a specific example.
 
+In the diagram <<blockchainwithforks>> we see a blockchain that contains two forks. At block height 4, a one-block fork occurs. This is the type of spontaneous fork we saw in <<forks>>. With the mining of block 5, the network reconverges on one chain and the fork is resolved.
+
 [[blockchainwithforks]]
 .A blockchain with forks
 image::images/mbc2_1009.png[A blockchain with forks]
 
-In the diagram <<blockchainwithforks>> we see a blockchain that contains two forks. At block height 4, a one-block fork occurs. This is the type of spontaneous fork we saw in <<forks>>. With the mining of block 5, the network reconverges on one chain and the fork is resolved.
-
 Later however, at block height 6, a hard fork occurs. Let's assume that a new implementation of the client is released with a change in the consensus rules. Starting on block height 7, miners running this new implementation will accept a new type of digital signature, let's call it a "Smores" signature, that is not ECDSA based. Immediately after, a node running the new implementation creates a transaction that contains a Smores signature and a miner with the updated software mines block 7b containing this transaction.
 
 Any node or miner that has not upgraded the software to validate Smores signatures, is now unable to process block 7b. From their perspective, both the transaction that contained a Smores signature and block 7b that contained that transaction are invalid, because they are evaluating them based upon the old consensus rules. These nodes will reject the transaction and the block and will not propagate them. Any miners that are using the old rules will not accept block 7b and will continue to mine a candidate block whose parent is block 6. In fact, miners using the old rules may not even receive block 7b if all the nodes they are connected to are also obeying the old rules and therefore not propagating the block. Eventually, they will be able to mine block 7a, which is valid under the old rules and does not contain any transactions with Smores signatures.