Monday, August 11, 2014

Local Anti-Computer Strategy

Anti-computer strategies generally use long term strategy as the basis for defeating computer. In other words the human player is said to create a grand strategy that is adaptable depending on the computer's strategy. The Local strategy that I am about to present is a short term one. Here is the game for review against the computer with search depth 7(the highest available on this particular version):


Note the use of strategy duality. By being aggressive solely with the queen we trick the computer into proceeding down search paths involving the queen and white aggression. By pulling back this tricks the computer into attempting to attack along the right while trapping the leftmost rook, bishop, and knight. However we quickly eliminate the pawn trap with another pawn and now use our three pieces in the end game. Keeping our king close to the pawns allows us to utilize all our "soldiers" in the pursuing end game as was planned. Now we can play rather carelessly as we out number him. Note that the trading is crucial as most computer strategies and many human strategies involve saving the rooks for the end in order to trap the king. As long as we eliminate one when the opportunity arises as we did, and aggressively trade pieces to eliminate most of the computer's flank, either right or left but remember to keep the opposite closed for your pieces. Here is a graph showing the computer's estimation of who has the advantage. Note the significant jump between the early and last moves. Also note how the computer is convinced of its own ability to win at Nh3, this is part of the strategy, as the Pseudo random erratic moves that we make greatly "confuse" the search algorithm.


PGN Contents:

1.e3 d6 2.Nf3 Bg4 3.Bb5+ c6 4.Bc4 d5 5.Bd3 Nd7 6.e4 dxe4 7.Bxe4 Ngf6 8.Qe2 Nxe4 9.Qxe4 f5 10.Qf4 e6 11.Qa4 b5 12.Qa6 Nc5 13.Qa3 b4 14.Qe3 Bd6 15.h3 Bxf3 16.gxf3 Qf6 17.Rg1 Qh4 18.Rg3 Bf4 19.Qxc5 Kf7 20.Rg1 Qf6 21.Qxc6 Rab8 22.Qd7+ Kg8 23.Qxa7 Rd8 24.c3 Bh2 25.Kf1 Bxg1 26.Kxg1 Qg5+ 27.Kf1 Qh4 28.Qe3 Qxh3+ 29.Ke2 Qh4 30.d4 Qe7 31.Qd3 g5 32.Qa6 e5 33.dxe5 Qxe5+ 34.Kf1 g4 35.Qe2 Qd5 36.cxb4 gxf3 37.Qd2 Qc4+ 38.Ke1 Rxd2 39.Kxd2 Qxb4+ 40.Nc3 Qd4+ 41.Kc2 Qxf2+ 42.Bd2 Qg2 43.Re1 Kf7 44.a4 f2 45.Re2 Qh1 46.Rxf2 Kg6 47.b4 Qa1 48.Kb3 Rc8 49.Rg2+ Kf6 50.Rg5 Qxc3+ 51.Bxc3+ Kxg5 52.b5 Kf4 53.b6 Ke4 54.a5 Rb8 55.Kc4 Rc8+ 56.Kb5 Kd5 57.b7 Rc7 58.b8=Q Rxc3 59.Qg8+ Kd6 60.Qxh7 Kd5 61.Qxf5+ Kd4 62.Qf6+ Kd3 63.Qxc3+ Kxc3 64.a6 Kd4 65.a7 Ke3 66.a8=Q Kd4 67.Qf3 Ke5 68.Kc4 Ke6 69.Kd4 Kd7 70.Qd5+ Ke8 71.Qe6+ Kd8 72.Qf7 Kc8 73.Kc5 Kd8 74.Kb6 Kc8 75.Qe8#

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