|
|
| From | Message | ||
|---|---|---|---|
|
 End Game Studies...An example of the latter is this famous study by Reti: White to play and draw. Looks impossible, doesn't it? Black can reel in White's pawn with ease; Black's pawn has a massive 2 square head start even if the WK begins its chase. But I'm here to tell you, it can be done. But my reason for posting is that late last night - or, to be more accurate, early this morning, this one turned up on my facebook feed. It's a study by Rinck. White to play... Check it out. White has a big lead in material, but it is momentary. The rook is attacking both bishops, threatening the one with check, and the other that would leave the knight surrounded. So... what is the task? White to play... and win! (Yes, I have solved this one for myself. It is enough that you can achieve a winning position; you don't have to play to checkmate. Give it a go. Surprise yourself!) |
||
|
Almost no response. No one else responded with even an incorrect answer. I'll post the solutions here, but clearly, this thread is finished unless someone else wants to take it up. (a) Study by Reti 1.Kg7 h4 2.Kf6 ... and now a1) 2...h3 3.Ke6 ... (NOT 3.Ke5??) 3...Kb6 4.Kd6 = a2) 2...Kb6 3.Ke5 Kxc6 4.Kf4 ... = (b) Study by Rinck 1.Bg2!! Rxf4+ 2.Kg3! ...and now, wherever the rook goes, it is lost: b1) 2...Rf5 3.Nd6+ Kb8 4.Nxf5 b2) 2...Rf6 3.Nc5+ Kb8 4.Nd7+ ... 5.Nxf6 b3) 2...Rf7 3.Nd6+ ... etc b4) 2...Rf8 3.Nc5+ ... etc b5) 2...Rd4 3.Na5+ Kb8 4.Nc6+ ... etc b6) 2...Rc4 3.Na5+ ... etc or Nd6+ ... etc b7) 2...Rb4 3.Na5+ Kb8 4.Nc6+ ... etc b8) 2...Ra4 3.Nc5+ ... etc b9) all other rook moves place it 'en prise'. |
||
|
Bishop Knight |
||
|
@lord_shiva 1. To begin with checkmate can be forced only in the corners the bishop can reach. So, if your bishop is the light-square one, you have to force the king into a light-square corner: a8 or h1. 2. A checkmate may be delivered anywhere else on the edge, but not forced. However, that very fact can sometimes force the defending king where you want it to go. 3. You begin by forcing the king to the edge of the board, using the pieces to corral the king into a more and more confined space, then... 4. Drive the king to the 'right' corner. One thing you have to watch for, though. When driving the king towards the corner you want, sometimes the king will make a break TOWARDS the danger corner in order to escape into the open board. That is the possibility that makes the procedure more tricky. |
||
|
markb56 17-Apr-24, 02:27 |
Deleted by markb56 on 17-Apr-24, 02:50.
|
||
|
markb56 17-Apr-24, 03:00 |
Deleted by markb56 on 17-Apr-24, 03:25.
|
||
|
Here's my method using 3 corrals CORRAL #1: Sample moves to get to corral #2 (if black runs towards the Bishop then the job is a lot easier): 1. ... Kd1 2. Kb2 Kd2 3. Bc2 Ke3 4. Kc1 Ke2 5. Bg6 Ke3 6. Kd1 Kf3 7. Kd2 Kf2 8. Bh5 Kg3 9. Ke3 Kh4 10. Be2 Kg3 11. Nc5 Kh4 12. Ne4 CORRAL #2: Sample moves to get to corral #3: 12. ... Kh3 13. Kf4 Kh4 14. Kf5 Kh3 15. Kg5 Kg2 16. Kg4 CORRAL #3: Depending on black's moves, mate will follow with B or N: 16. ... Kg1 17. Kg3 Kh1 18. Bf1 Kg1 19. Bh3 Kh1 20. Nc3 Kg1 21. Ne2+ Kh1 22. Bg2# --OR-- 16. ... Kh2 17. Bf1 Kg1 18. Bh3 Kh2 19. Nc3 Kg1 20. Kg3 Kh1 21. Bg2+ Kg1 22. Ne2# |
||
|
Observations: White's N moves between the "e" and "c" files whenever the opportunity arises: Ne6 to Nc5 to Ne4 to Nc3 to Ne2 White's B snakes it way in whenever the opportunity arises: Bg6 to Bh5 to Be2 to Bf1 to Bh3 White's K maintains opposition with the black King. If the black K races towards white's B then white keeps pushing with his K, otherwise white uses his B to push back the black K as in move "3. Bc2" Notice the tricky move "4. Kc1" if black tries to stay away from the edge. The best black can hope for is to oppose white's K and move away from the edge when possible. In the final moments black should stick to h2 and g1 to confuse white into stalemate with the B hoping that white isn't paying attention to the situation. I doubt I could ever pull of a KNBvK mate in 50 moves playing face to face over the board as I'd get too flustered with the clock ticking away. But playing here at GK I've deliberately promoted my pawns to B and N whenever my opponent refuses to resign in a lost position. I then send my opponent a message saying how much I would enjoy mating him with KBN, but the few times I've had the chance my opponent has then resigned as he doesn't want to be toyed with like a cat with a mouse. |
||
|
Three times - The last one was played on the giant chess set in the Christchurch square, over 30 years ago. My opponent kept insisting it was a draw - which must have distracted me some, because I suddenly noticed I was driving the King towards the wrong corner! Once I spotted that, corrected my plan, and finished the game in short order. So long as you know what the closing checkmate should look like, you have a fair chance of winning even if you don't know how to do it. This game from Gameknot very nearly came down to the KBNvsK end game, but my opponent elected to keep his a-pawn. here's the whole thing annotated. gameknot.com |
