MESON Chess Problem Database
Problem Display
PID: 210383 (R2b3K/nPPPkNPQ/4Pq2/7p/4N2B/8/b7/8 w - - 0 1)
Forsberg, Henry Olof Axel
Suomen Shakki, 1933
#2
11 + 6
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Bxc7
- 2.Re8#
- 1...Bxc7
- Tries
- 1.Sc5?
- threat
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qxh4
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bxc7
- 2.Re8#
- 1...Qg5
- 2.Bxg5#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bb1
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bb3
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bc4
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bd5
- 2.cxd8Q#
- 2.cxd8B#
- 1...Sb5
- 2.cxd8Q#
- 2.cxd8B#
- 2.c8S#
- 1...Sc6
- 2.c8S#
- 1...Sc8
- 2.bxc8S#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bxe6!
- threat
- 1.Sxd8?
- threat
- 2.Bxf6#
- 1...Qxh4
- 2.g8Q#
- 2.g8R#
- 1...Qg5
- 2.Bxg5#
- 2.g8Q#
- 2.g8R#
- 1...Bxe6!
- threat
- 1.Qf5?
- threat
- 2.Bxf6#
- 2.Qxf6#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bxc7
- 2.Bxf6#
- 2.Re8#
- 2.Qxf6#
- 1...Bb1
- 2.Bxf6#
- 2.Qxf6#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bb3
- 2.Bxf6#
- 2.Qxf6#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bc4
- 2.Bxf6#
- 2.Qxf6#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bd5
- 2.Bxf6#
- 2.Qxf6#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Sb5
- 2.Bxf6#
- 2.Qxf6#
- 2.cxd8Q#
- 2.cxd8B#
- 2.c8S#
- 1...Sc6
- 2.Bxf6#
- 2.Qxf6#
- 2.c8S#
- 1...Sc8
- 2.Bxf6#
- 2.Qxf6#
- 2.bxc8S#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bxe6!
- threat
- 1.Qg6?
- threat
- 2.Qxf6#
- 1...Qxh4
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bxe6
- 2.cxd8Q#
- 1...Qg5
- 2.Bxg5#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Kxe6!
- threat
- 1.Sc5?
- Keys
- 1.Sfg5!
- threat
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qxg7+
- 2.Qxg7#
- 1...Qf8+
- 2.g8S#
- 1...Qxg5
- 2.g8Q#
- 1...Bxc7
- 2.Re8#
- 1...Qa1
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qb2
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qc3
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qd4
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qe5
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qf1
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qf2
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qf3
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qf4
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qf5
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qg6
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qh6
- 2.cxd8Q#
- 2.cxd8B#
- 1...Qf7
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bb1
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bb3
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bc4
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bd5
- 2.cxd8Q#
- 2.cxd8B#
- 1...Sb5
- 2.cxd8Q#
- 2.cxd8B#
- 2.c8S#
- 1...Sc6
- 2.c8S#
- 1...Sc8
- 2.bxc8S#
- threat
- 1.Sfg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- B(f);OGATE,XP(E)::R1(J)
- Tries
- Try
- S(A);
- Threat
- PXB(f)=Q
- Vars
- Q(c);N_PINP(H),N_SPINQ(c),XB(B)::PXB(f)=Q
- B(f);OGATE,XP(E)::R1(J)
- B(a);::PXB(f)=Q
- S(d);N_GUARD::P=S
- Refutation
- B(a);XP(C)
- Try
- S(G);XB(f)
- Threat
- B(B),XQ(c)
- Vars
- Q(c);N_PINP(H),N_SPINQ(c),XB(B)::P=Q
- Refutation
- B(a);XP(C)
- Try
- Q(I);
- Threat
- DUALS(4)
- Refutation
- B(a);XP(C)
- Try
- Q(I);
- Threat
- QAB1(I),XQ(c)
- Vars
- Q(c);N_PINP(H),N_SPINQ(c),XB(B)::PXB(f)=Q
- B(a);SBLOCK,XP(C)::PXB(f)=Q
- Refutation
- K(e);P-FLIGHT,XP(C)
- Try
- Actual
- S(G);N_PINQ(c)
- Threat
- PXB(f)=Q
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XP(H)::QAR2(I),XQ(c)
- Q(c);CHECK,N_PINP(H),SBLOCK::P=S
- Q(c);N_PINP(H),P_SPINQ(c),XS(G)::P=Q
- B(f);OGATE,XP(E)::R1(J)
- Q(c);::PXB(f)=Q
- Q(c);N_PINP(H)::PXB(f)=Q
- Q(c);N_PINP(H),P_PINQ(I)::PXB(f)=Q
- B(a);::PXB(f)=Q
- S(d);N_GUARD::P=S
- S(d);OGATE::PXS(d)=S
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