Russia has the upper hand in Kursk. Putin clearly feels he is negotiating from a position of strength and doesn't want to lose it.
"If we stop military actions for 30 days, what does that mean? Will everyone who is there leave the battle?"
Russia's defence ministry announced on Thursday that its forces had now taken full control of the biggest city the Ukrainians had managed to seize, Sudzha. Putin says all the Ukrainians have left is a wedge, so why would Russia stop now?
"If a physical blockade occurs in the coming days, no-one will be able to leave at all. There will be only two options – to surrender or die."
The same applied to the whole of the 1,000km (620-mile) front line, where he claimed the situation on the ground was changing rapidly, with Russian troops "advancing in practically all areas".That is not the case, as most of the front is at a stalemate, even if Russia has had some recent success in the east.
Putin believes a 30-day ceasefire would deprive Russia of its advantage and enable the Ukrainians to regroup and rearm.
"What are our guarantees that nothing like that will be allowed to happen," he asked rhetorically.
As yet, no mechanism has been offered to ensure that the terms of any ceasefire would hold.
Russia is ready for a halt in fighting, says Vladimir Putin, but he says there are "nuances".
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