20251013 0929 Black to move

1. ... Qxc3+ 
2. Kb1 Qxb3+ 
3. Qb2 Nc3+ 
4. Ka1 Qa4+ 
5. Qa2 Qxa2#

PGN
[Site "Chess.com"]
[Result "0-1"]
[SetUp "1"]
[FEN "2r1k2r/pp3ppp/2q5/3n4/4B3/1PbPB1PP/1P2QP2/2KRR3 w k - 0 1"]
1. bxc3 Qxc3+ 2. Kb1 Qxb3+ 3. Qb2 Nc3+ 4. Ka1 Qa4+ 5. Qa2 Qxa2# 0-1

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20250301 1432 white#2 very good to analyze

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FEN 7K/8/8/8/8/4R3/k6p/BRb4Q w - - 0 1 Hindi Chess Talks chess 1.Rb6! 🔑 1- If 1...Kxa1 2.Ra3# 2-If 1...Bb2+ 2.Rxb2# 3-If 1... Bxe3 2.Qa8#. 1- if 1...Ka1 2. Ra3#  Bc1 is pinned by wht Qh1 to blk Ka1 &  cannot defend on a3 square or a open discovery check from Wht Qh1 will occur. Illegal defense move. So Rb6 covers b- file & Ra3 has blk Ka1 in check with no escape results in a checkmate in 2  2-If 1...Bb2+ 2Rxb2# Rb2 has blk Ka2 in check & covered by Ba1. Ba1 is protected by Qh1 as Re3 covers a3 square for a check. Ka2 is in check & no escape results in a checkmate in 2. 3-If 1... Bxe3 2. Qa8#.  Be3 can't block or stop Qa8 checkmate because Rb6 is blocking.  Rb6 cover all b- file & Qa8 covers a-file & Has Ka2 in check with no escape results in a checkmate in 2. Why Ra6 1. Rb3 isn´t mate in 2 Kxa1 2. Qxc1+ Ra2 1. Rb4 isn't mate in 2 Bxe3 2.Qb1+ Ka3 1. Rb5 isn't mate in 2 because de Bishop bloq the Queen attack
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20250328 2009 bl#3

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1... Rb8+  2. Bb3 Qxb3+  If 3. Ka1 Qxa3# If 3. Kc1 Qb2# FEN  2r2k1r/5p1p/p7/3pp1Q1/B7/P1qP2P1/5P1P/1K1R3R b - - 0 1 PGN [Variant "From Position"] [FEN "2r2k1r/5p1p/p7/3pp1Q1/B7/P1qP2P1/5P1P/1K1R3R b - - 0 1"] 1... Rb8+ 2. Bb3 Qxb3+ 3. Ka1 Qxa3#
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