Once one side's pieces are gone, the stronger side is left with the task of finding and mating that King without stalemating.
F: Mallett-Keller REF: Voorhees 1.d4 1... e5 2.Bg5 (dxc5;Bg5) Once 2...dxc5 has eliminated the possibility of 1...c5, White knows that Black's must have played 1...e5. Therefore he rushes to play Bc1-g5-d8 to capture the Queen. Black is not careless, however: 2... Be7 3.Bxe7 (Bd8;Be7;Bh4) 3... Qxe7 4.dxe5 Nc6 5.f4 f6 6.Nf3 (fxg5;bxa3;bxc3;hxg3;axb3;Nf3) 6... fxe5 (fxe5,dxe6,d6) 7.fxe5 d6 8.exd6 (exf6;exd6;bxa3;axb3;hxg3;gxh3;exd3;cxe3) 8... cxd6 9.e4 (e4;e3;Qd3) 9... Nh6 10.a4 Nf5 11.h3 O-O (O-O,Rf8,Rg8) 12.Ra3 (Ra3;Ra2) Kriegspiel affords some opportunity for original development. The Rook is headed to double with the Queen on the d-file. 12... Ne3 13.Nbd2 Qh4+ (Rf1,Qh4+,Nc2) 14.Nxh4 (Nh4;Kf2;Ke2) 14... g5 (g5,Rf1,Rf2,Rf3,Rf4,Bd6) 15.Nhf3 It's usually good policy to move pieces after capturing for just this sort of reason. 15... g4 (g4,Bg4,Bf5,Be6,Bd7) 16.hxg4 (hxg4;exf5;exd5;axb5;Rd3;Rc3;Rb3) 16... Bxg4 (Bxg4,Bf5,Be6,Bd7) 17.Rd3 Bxf3 (Bxf3,Nd1,Rae8,...,Rab8) 18.gxf3 Nxd1 This was a shock for White. The pinning of the e-Pawn confused things. 19.Kxd1 Rad8 (Rad8,Rac8,Rab8) 20.Nc4 d5 (d5,Ne7) 21.exd5 (axb5;fxg4;exd5;exf5;bxa3;bxc3;cxb3) 21... Rxd5 (Rxd5,Rd6,Rd7) 22.Rxd5 Nb4 23.R(d)h5 (Rdh5;Rdf5;Rde5;Rd8;Rd7;Rd6) After pocketing the booty, White's Rook runs away. 23... Nd5 24.Bd3 (Bd3;Be2) White wants to capture on h7, but piles up another piece on that square first. It's always best to be on the safe side by protecting constested squares you're moving to as much as possible. If Black had followed this advice, he might not have risked 22.Rxd5 24... Ne3+(N) The check gives the Knight away, just at it gave the Queen away earlier. 25.Nxe3 (Ne3;Ke2;Kd2) 25... Rf4 (Rf4,Rf5,Rf6,Rf7) 26.Kd2 (Kd2;Ke2;Ng2) 26... Kf7 (Kf7,Kg7,Kf8,h5,h6,a5,a6) 27. Rxh7+(r) (Rh7;Rh6) 27... Ke6 (Ke7,Kg7,{Ke6},Kf6,Kg6,Ke8,Kf8,Kg8) 28.Ng2 (f4;Ng2) Since 28...f4 isn't legal, White has found a Black piece! He sets out at once to capture it before it moves away. 28. ... Kd6 (Kd6,Kf6,Ke5,Kd5,Kf5,Kd7,Ke7,Kf7,Rf6) 29.Nxf4 a5 (Kc7,a5,a6,b5,b6,Kd7,Ke7,Kc6,Ke6,Kc5,Kd5,Ke5) 30.Ne2 Kc5 (Kc7,a4,b4,b3,Kc5,Kd5,Ke5,Kc6,Ke6,Kd7,Ke7) 31.f4 (f4;Nf4) 31... b5 (a4,Kb5,b5,b6,Kb4,Kc4,Kd4,Kd5,Kb6,Kc6,Kd6) 32.axb5 (axb5;bxc3;cxb3;bxa3;fxg5;fxe5) 32... a4 (a4,Kxb5,Kb4,Kc4,Kd4,Kd5,Kb6,Kc6,Kd6) 33. R1h6 (R1h6;R1h5;R1h4;R1h3;R1h2) 33... a3 (Kb6,Kb5,a3,Kb4,Kc4,Kc6,Kd4,Kd5,Kd6) 34. bxa3 (bxa6;bxc6;fxe5;fxg5;bxa3;cxb3;bxc3) Now that it's clear Black only has his King left, all I have to worry about is stalemating it! There are very few unattacked squares. At this point, I decided to try to checkmate the Black King if it stood on c5 or d5, though I thought there was a faint possibility it could have gotten to g4. 34... Kd5 (Kb6,Kb5,Kb4,Kc4,Kc6,Kd4,Kd5,Kd6) 35. f5 (f5;Bf5;Be4;Kc3;Ke3;Ng3) This secures e5 for the Rook. Now Black's King will be moving to either c5, d5, or e5, so I have to move carefully to force mate for any of those cases. 35... Kc5 (Kd4,Kc4,Ke4,Kc5,Ke5,Kc6,Kd6,Ke6) 36.Re6 No check, so that eliminates one possibility. The Black King is moving to c5 or d5. 36... Kd5 (Kb5,Kb6,Kb4,Kc4,Kd4,Kd5,Kd6,Kc6) 37.Rc6 37.Rd7? would have stalemated if the King had it stood on c5. No check, so the King must be on d5 (rather than c5). It's a perfect information game from here on out. 37... Ke5 (Kc4,Kd4,Ke4,Kc5,Ke5,Kc6,Kd6,Ke6) 38.Re6+(f) 38... Kd5 (Ke4,Ke6,Kd4,Kd5,Kd6,Kf4,Kf5,Kf6) 39.Rd7+(f) 39... Kc5 (forced) 40.Rc7++ 1-0
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