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1P-26+0.72P-84+0.53P-25+0.3The name Bogin (棒銀) implies a Silver at 3i will climb up Rook's path. The first move for this opening is to advance Rook's Pawn.4P-85+0.85G-78+0.35.P-24?Pushing pawn too early will be bad for Black6.Px247.Rx248.P-869.P*236G-32+0.26.R-847P-24+0.48Px24+0.69Rx24+0.310P*23+0.410.P-3410.P-1411R-28-0.111.R-2612P-86+0.412.P-3413Px86+0.614Rx86+0.615P*87+0.416R-82+0.617S-38+0.618S-62+0.919S-27+0.720K-41+3.420.P-34P-3d might be a stronger move21S-26+3.122G-52+5.322.R-8523S-35+5.924P-54+8.525P*24+8.5This is 3 vs 226Px24+8.327Sx24+7.728P-34+7.529S-23=+7.4S-2c= , important not to promote Silver to keep the diagonal30B-44+8.631Sx34++8.432B-22??+26.9Blunder. The best move was:32.S-2233.+Sx4434.Px4435.P-7636.S-5337.K-6938.P*2339.S-6840.G32-4341.P-4642.N-3343.K-7944.K-3245.P-3646.P-7447.N-3748.P-7549.P-4533P*24+25.534P*36+28.335P-23++28.036B-55+28.037+Px32+27.138Sx32+26.439G*46+24.4Fairy-Stockfish evals this at +13 for Black (Sente) - a success
"Simple, yet deadly. This opening shows you how a silver can be used along with Rook for attacking your opponent.

Genshi Bogin (原始棒銀=Primitive climbing Silver) is the easiest strategy to learn. This is also a deadly attacking system if your opponent does not know how to defend. Therefore, this should be probably the first opening that Shogi learner should study."

More info: shogishack.net/pages/study-room/shogi-openings/primitive-climbing-silver.html

alternative vid: youtu.be/JkPjIMNzuec
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