QxB
Teams Puzzle | Yellow to Move
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wait yellow can't play 2 moves in a row
Rxb6?
I think it's Rxb6 yeah
Dec 28, 2022
0
#6
on the right track, but there are some very important lines to consider
there's a fun line with
1. Re6xb6 .. Rn5xk5
2. Bh2-g1 .. Ra4-d4 .. Qh12xl8 .. Rk5xRk1+
3. Kh1-h2 .. Qa8xf13+ .. Nd12xQf13 .. m7xQl8
4. Bg1xRd4 .. Ka7-a8 .. h11xBi10 .. Rk1-g1
5. Bg2xd5++ .. Ka8-a7 .. Rb6-g6+ .. Rg1xRg6+
6. Bd4xKa7#
but Rh1 is more precise for green there. so after 4.g Rh1 and KxR there's 3 options we've looked at:
if 5.b yellow can just move the rook over Rb5 forcing Bb6 red still takes Bxd5 and after Kb8 (only interesting move it seems) RxBb6 Nm8 and Bf7 is forcing mate: Kc10 Ne11+ and Bxd9# is unstoppable.
if 5.b Nb8 the light squares are weak for a checkmate: Ra6 and Bd5 expose the king enough since yellow also has ideas of Bxd9 and the bishops can connect on b9 and c10. There might be a way to throw Bc9 in as green at some point to get rid of the pawn allowing blue to get an escape square but in that case you can at the very least win some pieces while maintaining the attack.
if 5.b Bb8 still Ra6 and Bxd5 but this time the some of the checkmating ideas are a little more tricky since green can get Bf6 in some lines. however after Kb9 Bf11 red does get Ba8 forcing Ka9 and ther are some king capture tricks with Nd12 Bf13 and Nc9+ forcing the king into red's bishop for a king capture.
The puzzle (edited slightly from the actual game):
PGN4:
[StartFen4 "Y-0,0,0,0-1,1,1,0-0,1,0,0-0,0,0,0-4-x,x,x,yR,1,yB,yK,4,x,x,x/x,x,x,1,yP,yP,1,yB,2,yP,x,x,x/x,x,x,yN,1,yP,1,yQ,yP,2,x,x,x/bR,1,bP,4,yP,2,yP,1,gP,gR/bN,bP,1,yP,4,bB,2,gP,1,gN/bB,2,bP,7,gP,2/bQ,1,bP,gB,7,gP,2/bK,1,bP,9,gP,gK/1,bP,2,yR,7,gP,1/3,bP,6,rP,2,gR/bR,4,rP,2,rN,3,gP,1/x,x,x,rP,3,rP,3,x,x,x/x,x,x,3,rB,rB,rP,rP,1,x,x,x/x,x,x,4,rK,2,rR,x,x,x"]
[Variant "Teams"]
[RuleVariants "EnPassant"]
[CurrentMove "0"]
[TimeControl "2 | 10"]
The game: https://www.chess.com/variants/custom/game/33383718/62/3
I thought this was a pretty cool game with lots of tactical sacrifices and a nice forcing win at the end. Unfortunately the combo in the game doesn't exactly work, so I had to edit the position by moving the pawn on g13 to f12.