Common shape in a 4-4 joseki

When white extends up, black used to respond at A, but... White can cut at A to fight or simply play B to take the corner. Both variations are good for white. So now people will exchange this hane first. If white cuts, black can sacrifice the stones to gain thickness. This is good for black. If … Continue reading Common shape in a 4-4 joseki

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Kill 3-3 invasion in star point small knight enclosure

Black needs to be thick on the outside in order to kill the corner cleanly. Variation A: This requires a favourable ladder. Variation B: White's kosumi doesn't work. Black can kill white unconditionally. Variation C: White can play A to start a two-step ko. If white plays B, white dies unconditionally. Black can connect at O2 and white … Continue reading Kill 3-3 invasion in star point small knight enclosure

Kobayashi Opening I: One-space high approach

The Kobayashi opening has been fallen out of favour in recent years, but the pros are still studying it and have found some new variations. The one-space high approach used to be considered bad because black can attack it and settle on both sides. Other than jumping mindlessly, there are other options for white, ranging from B to D. … Continue reading Kobayashi Opening I: One-space high approach