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Look easy.
1. Rb8+ Kxb8
2. Bxd6 … Ka8
3. Nb6 #
or
2 …. Kc8
3. Nb6+ Kd8
4. Bc7#
1.Rb8+ Kxb8
2.Bxd6+ Kc8 (Ka8 3.Nb6#)
3.Nb6+ Kd8
4.Bc7#
Very nice!
Cheers Jean-Claude
1. Rb8! Kxb8 2. Bxd6 Kc8 3. Nb6 Kd8
4. Bd7
White in mortal danger! Desperation needed! Huereka! 1. Rb8+! is mate in four!!
1. Rb8+ K:b8 2. B:d6+ Kc8 3. Nb6+ Kd8 4. Bc7#
1.Rb8+ Kxb8
2.Bxd6+ Kc8 (2…Ka8 3.Nb6#)
3.Nc6+ Kd8
4.Bc7#
Black is threatening mate six ways from Sunday: 1. … h1Q#, 1. … Bh3#, 1. … Rxf2+ 2. Ke1 (2. Kxf2 Nd3#) Nd3+ 3. Kd1 Rd1#. So White has to operate with checks.
White has only four checks: 1. Nb6+, 1. Rb8+, 1. Rc1+, and 1. Rc7+.
1. Nb6+ Kd8 and I don’t see a decent followup.
1. Rc1+ Kd8 and I don’t see a decent followup.
1. Rc7+ Kxc7 and I don’t see a decent followup.
1. Rb8+! Kxb8
2. Bxd6+ Kc8 (2. … Ka8 3. Nb6#)
3. Nb6+ Kd8
4. Bc7#
a quick checkmate:
1. Rb8+ Kxb8
2. Bxd6+ Ka8
3. Nb6#
if 2. … Kc8, then
3. Nb6+ Kd8
4. Bc7#
greets, jan
Rb8+, Kxb8. Bxd6, etc.
Rb8+ Kxb8
Bxd6+ K moves
Nb6+ Mate if the king has gone to a8, and if the king has gone to c8 then
……Kd8
Rd7 mate
Well, given that black is about to mate with h1(Q), white must either check the black king with the first move, or play Rh7. 1.Rh7 just seems pointless to me since black has threats like Bh3 and Nd3 in hand to press the mating net anyway. Of the moves to check the king, the options are Rc7, Nb6, and Rb8. Taking them in order:
1. Rc7 Kc7
2. Rc1 Kd8 and it is over for white. The only check left is Rc8 and it only delays the coming mate. At move 2, the other checks on the king just lose so much material that white can’t even hope for perpetual check draw. Or
1. Nb6 Kd8 (Kb8?? 2. Bd6#)
2. Rh7
Rd7 is meaningless. Continuing:
3. …..Nd3
And white can’t stop both Re1 and Rf2. This leaves
1. Rb8 Kb8
2. Bd6 Kc8 (Ka8 3.Nb6#)
3. Nb6 Kd8
4. Bc7#
Rb8 actually is pretty obvious since it is the only way to bring the bishop and the knight into the attack with checks on the black king.
r-b8+ mates in all lines
Here’s a tricky one. Any other move it is white that loses. The only way to win is:
1. Rb8+ Kxb8
2. Bxd6+ Kc8
3. Nb6+ Kd8
4. Bc7 mate
quite simple i guess..
white plays Rb8+ and everything else is forced.
1) Rb8+, Kxb8
2) Bxd6+, Kc8 (Ka8 leads to Nb6++)
3) Nb6+, Kd8
4) Bc7++
rb8+
han
Let’s try:
1. Rb8 Kb8 forced
2. Bd6 Kc8 if Ka8 3. Nb6#
3. Nb6 Kd8 forced
4. Bc7#
Rb8+ Kxb8
Bxd6+ Kc8
Nb6+ Kd8
Bc7#
1.Rb8+,Kxb8 2. Bxd6+, Kc8 (2..Ka8,Nb6#) 3.Nb6+,Kd8 4. Bc7#
It is very beautiful. At first, I thought white has to sac everything so as to get a stalemate but instead there is a forced mate.
1. Rb8+ Kxb8 2. Bxd6+ Kc6 3. Nb6+ Kd8 4. Bc7
Forced mate Rb8+ Kxb8, Bxd6+ (..Ka8, Nb6#) Kc8, Nb6+ Kd8, Bc7#.
Clear win for White. 1)Rb8+ Kb8 2)Bd6+
A) 2)…. Ka8 3)Nb6#
B) 2)…. Kc8 3)Nb6+ Kd8 4)Bc7+#
— Sayan
1.Rb8! mates
1…Kxb8
2.Bxd6+ Kc8 (if Ka8, Nb6#)
3.Nb6 Kd8
4.Bc7#
From Spain…
Checkmate in 4
1)Rb8+,Kb8
2)Bd6+,Kc8
3)Nb6+,Kd8
4)Bc7++
Greetings from spain
Tommy K. says:
1.Rb8+ Kxb8
2.Bxd6+ Kc8
(if…Ka8 then Nb6#)
3.Nb6+ Kd8
4.Bc7#
Black threatens mate in 1 (Bh3) so white must act fast:
1. Rb8+ Kxb8
2. Bxd6+ Kc8
3. Nb6+ Kd8
4. Bc7#
2…Ka8
3. Nb6#
Rb8+!
Rb8+ followed by Bxd6+ leads to mate. Phil
1. Rb8, Kxb8
2. Bd6, Kc8
3. Nb6, Kd8
4. Bc7
Just when I solved it and was going to post, all the comments appeared. :-/