{"push_id":3039983209,"size":1,"distinct_size":1,"ref":"refs/heads/master","head":"30a905c95d0b77874244c8b68ae77daba41ac545","before":"05aa34e00ed78adfa943242026a00dc497acd563","commits":[{"sha":"30a905c95d0b77874244c8b68ae77daba41ac545","author":{"name":"31m059","email":"5a46a3f19c2aebffb0cdb50e0853db2cc7190558@users.noreply.github.com"},"message":"Simplify tropism. (#1807)\n\nWe calculate tropism as a sum of two factors. The first is the number of squares in our kingFlank and Camp that are attacked by the enemy; the second is number of these squares that are attacked twice. Prior to this commit, we excluded squares we defended with pawns from this second value, but this appears unnecessary. (Doubly-attacked squares near our king are still dangerous.) The removal of this exclusion is a possible small Elo gain at STC (estimated +1.59) and almost exactly neutral at LTC (estimated +0.04).\r\n\r\nSTC:\r\nLLR: 2.96 (-2.94,2.94) [-3.00,1.00]\r\nTotal: 20942 W: 4550 L: 4427 D: 11965\r\nhttp://tests.stockfishchess.org/tests/view/5be4e0ae0ebc595e0ae308a0\r\n\r\nLTC:\r\nLLR: 2.94 (-2.94,2.94) [-3.00,1.00]\r\nTotal: 56941 W: 9172 L: 9108 D: 38661\r\nhttp://tests.stockfishchess.org/tests/view/5be4ec340ebc595e0ae30938\r\n\r\nBench: 3813986","distinct":true,"url":"https://api.github.com/repos/SFisGOD/Stockfish/commits/30a905c95d0b77874244c8b68ae77daba41ac545"}]}
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