MESON Chess Problem Database
Problem Display
PID: 54110 (4N3/3p2R1/4k1n1/6RN/b2p1B2/1r3BK1/Q1qpP3/b7 w - - 0 1)
Ellerman, Arnoldo
Chess, 1943
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sc7#
- 1...Qd1
- 2.Sc7#
- 1...Qd3
- 2.Sc7#
- 1...Qe4
- 2.Sc7#
- 1...Qf5
- 2.Sc7#
- 1...Qxa2
- 2.Sc7#
- 1...Qb2
- 2.Sc7#
- 1...Qc7
- 2.Sxc7#
- 1...Bc3
- 2.Sc7#
- 2.Bd5#
- 1...Bc6
- 2.Sc7#
- 1...Sxf4
- 2.Sxf4#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...d3
- 2.Bg4#
- 2.Bd5#
- 1...Qb1
- Tries
- 1.Kh2?
- threat
- 2.Bd5#
- 1...Sxf4
- 2.Sxf4#
- 1...Qe4
- 2.Sc7#
- 1...Qf5
- 2.Sc7#
- 1...Qc4
- 2.Bg4#
- 1...Qc6
- 2.Bg4#
- 1...Bc6
- 2.Sc7#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...d5
- 2.Bxd5#
- 1...Qc5!
- threat
- 1.Kg4?
- threat
- 2.Bd5#
- 1...Se5+
- 2.Rxe5#
- 1...Sxf4
- 2.Sxf4#
- 1...Qc5
- 2.R5xg6#
- 1...Qe4
- 2.Sc7#
- 1...Qc4
- 2.R5xg6#
- 1...Qc6
- 2.R5xg6#
- 1...Bc6
- 2.Sc7#
- 1...Se7
- 2.Re5#
- 1...d5
- 2.Bxd5#
- 1...Qf5+!
- threat
- 1.R5xg6+?
- 1...Kf5
- 2.Sd6#
- 2.Rf6#
- 1...Qxg6+!
- 1...Kf5
- 1.Qxb3+?
- 1...Qxb3
- 2.Sc7#
- 1...Qc4
- 2.Sc7#
- 2.Bg4#
- 1...d5
- 2.Bxd5#
- 2.Qxd5#
- 1...Bxb3!
- 1...Qxb3
- 1.Qxc2?
- threat
- 2.Sc7#
- 2.R5xg6#
- 2.Qf5#
- 2.Qxg6#
- 1...Sxf4
- 2.Sxf4#
- 2.Qe4#
- 2.Qf5#
- 1...Rc3
- 2.R5xg6#
- 2.Qf5#
- 2.Qxg6#
- 1...Rd3
- 2.Sc7#
- 1...Rb5
- 2.Sc7#
- 2.R5xg6#
- 2.Qxg6#
- 1...Rb7
- 2.Bg4#
- 2.Bd5#
- 2.R5xg6#
- 2.Qf5#
- 2.Qxg6#
- 1...Sh4
- 2.Sc7#
- 2.Re5#
- 2.Qe4#
- 1...Se5
- 2.Rxe5#
- 2.Qf5#
- 1...Se7
- 2.Sc7#
- 2.Re5#
- 2.Qe4#
- 1...Sf8
- 2.Sc7#
- 2.Re5#
- 2.Qe4#
- 2.Qf5#
- 1...Sh8
- 2.Sc7#
- 2.Re5#
- 2.Qe4#
- 2.Qf5#
- 1...d3
- 2.Sc7#
- 2.Bg4#
- 2.Bd5#
- 1...Rxf3+!
- threat
- 1.e3?
- threat
- 2.Bd5#
- 1...Sxf4
- 2.Sxf4#
- 1...Qe4
- 2.Sc7#
- 1...Qf5
- 2.Sc7#
- 1...Qc4
- 2.Bg4#
- 1...Qc6
- 2.Bg4#
- 1...Bc6
- 2.Sc7#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...d5
- 2.Bxd5#
- 1...Qc5!
- threat
- 1.Kh2?
- Keys
- 1.e4!
- threat
- 2.R5xg6#
- 1...Qxe4
- 2.Sc7#
- 1...Sxf4
- 2.Sxf4#
- 1...dxe4 ep
- 2.Bd5#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...d3
- 2.Bg4#
- threat
- 1.e4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- Q(b);N_GUARD::S(I)
- Q(b);N_GUARD,N_SPINR(d),XQ(A)::S(I)
- Q(b);N_GUARD::S(I),XQ(b)
- B(e);S_CUTQ(b)::S(I)
- S(h);XB(E)::S(G),XS(h)
- S(h);N_GUARD::R1(F)
- S(h);N_GUARD::R1(F),XS(h)
- Tries
- Try
- K(D);N_SPINB(C),S_FLIGHT
- Threat
- B(C)
- Vars
- S(h);XB(E)::S(G),XS(h)
- Q(b);N_GUARD::S(I)
- Q(b);N_GUARD,N_SPINR(d)::B(C)
- Q(b);N_GUARD::B(C)
- B(e);S_CUTQ(b)::S(I)
- S(h);N_GUARD::R1(F),XS(h)
- S(h);N_GUARD::R1(F)
- P(i);N_SPINR(d)::B(C),XP(i)
- Refutation
- Q(b);
- Try
- K(D);N_SPINB(C),P-FLIGHT
- Threat
- B(C)
- Vars
- S(h);CHECK,N_GUARD::R1(F),XS(h)
- S(h);XB(E)::S(G),XS(h)
- Q(b);N_GUARD::R(F),XS(h)
- Q(b);N_GUARD,P_PINB(E)::S(I)
- Q(b);N_GUARD,N_SPINR(d)::R(F),XS(h)
- B(e);S_CUTQ(b)::S(I)
- S(h);N_GUARD::R1(F)
- P(i);N_SPINR(d)::B(C),XP(i)
- Refutation
- Q(b);CHECK
- Try
- R(F);CHECK,XS(h)
- Refutation
- Q(b);CHECK,XR(F)
- Try
- Q(A);CHECK,N_SPINB(C),XR(d)
- Vars
- Q(b);P_PINB(C),XQ(A)::S(I)
- Refutation
- B(e);XQ(A)
- Try
- Q(A);N_PINR(d),XQ(b)
- Threat
- DUALS(4)
- Vars
- R(d);::S(I)
- Refutation
- R(d);CHECK,XB(C)
- Try
- P(B);N_SPINB(C)
- Threat
- B(C)
- Vars
- S(h);XB(E)::S(G),XS(h)
- Q(b);N_GUARD::S(I)
- Q(b);N_GUARD,N_SPINR(d)::B(C)
- Q(b);N_GUARD::B(C)
- B(e);S_CUTQ(b)::S(I)
- S(h);N_GUARD::R1(F),XS(h)
- S(h);N_GUARD::R1(F)
- P(i);N_SPINR(d)::B(C),XP(i)
- Refutation
- Q(b);
- Try
- Actual
- P(B);
- Threat
- R(F),XS(h)
- Vars
- Q(b);N_GUARD,XP(B)::S(I)
- S(h);XB(E)::S(G),XS(h)
- P(f);EP,N_PINB(C),XP(B)::B(C)
- S(h);N_GUARD::R1(F)
- S(h);N_GUARD::R1(F),XS(h)
- P(f);N_PINB(C)::B(C)
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