MESON Chess Problem Database
Problem Display
PID: 47413 (7b/1nBPk3/1r1n1R1R/4NB2/4pNK1/6p1/3r4/5Q2 w - - 0 1)
Degener, Udo
1st Prize, US Problem Bulletin, 1989
#2
9 + 8
| 4827 | FIDE Album (1989-1991) | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Ra2
- 2.Sd5#
- 1...Rdb2
- 2.Sd5#
- 1...Rc2
- 2.Sd5#
- 1...Re2
- 2.Sd5#
- 1...Rf2
- 2.Sd5#
- 1...Rg2
- 2.Sd5#
- 1...Rh2
- 2.Sd5#
- 1...Rd5
- 2.Sxd5#
- 1...Rb1
- 2.Sc6#
- 1...Rbb2
- 2.Sc6#
- 1...Rb3
- 2.Sc6#
- 1...Rb4
- 2.Sc6#
- 1...Rb5
- 2.Sc6#
- 1...Rc6
- 2.Sxc6#
- 1...Bxf6
- 2.Sfg6#
- 1...Sc4
- 2.Rf7#
- 1...Sb5
- 2.Rf7#
- 1...Sxf5
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...Sc8
- 2.Rf7#
- 1...Se8
- 2.Rf7#
- 1...Sa5
- 2.d8Q#
- 1...Sc5
- 2.d8Q#
- 1...Ra2
- Tries
- 1.Kg5?
- threat
- 2.Sfg6#
- 2.Seg6#
- 1...Sf7+
- 2.Rxf7#
- 1...Sxf5
- 2.Sfg6#
- 2.Rf7#
- 1...Bxf6+!
- threat
- 1.Sh5?
- threat
- 2.Sg6#
- 1...Sxf5
- 2.Rf7#
- 1...Bxf6!
- threat
- 1.Bxe4?
- threat
- 2.Sfg6#
- 1...Rf2
- 2.Sd5#
- 1...Sf5
- 2.Rf7#
- 1...Bxf6!
- threat
- 1.Bh7?
- threat
- 2.Sfg6#
- 1...Rf2
- 2.Sd5#
- 1...Sf5
- 2.Rf7#
- 1...Bxf6!
- threat
- 1.Bxb6?
- threat
- 2.Sc6#
- 1...Bxf6
- 2.Sfg6#
- 1...Sxf5
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...Rc2
- 2.Sd5#
- 1...Sa5
- 2.d8Q#
- 1...Sd8!
- threat
- 1.Rf8?
- threat
- 2.Sfg6#
- 2.Seg6#
- 1...Bxe5
- 2.Sg6#
- 1...Sxf5
- 2.Rf7#
- 2.Re8#
- 1...Sc4
- 2.Rf7#
- 2.Re8#
- 1...Sb5
- 2.Rf7#
- 2.Re8#
- 1...Sf7
- 2.Rxf7#
- 2.Re8#
- 1...Sc8
- 2.Rf7#
- 2.Re8#
- 1...Se8
- 2.Rf7#
- 2.Rxe8#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Kxf8!
- threat
- 1.Rxh8?
- threat
- 2.Re6#
- 1...Sxf5
- 2.Rf7#
- 1...Sc4
- 2.Rf7#
- 1...Sb5
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...Sc8
- 2.Rf7#
- 1...Se8
- 2.Rf7#
- 1...Sc5
- 2.Bd8#
- 2.d8Q#
- 2.d8B#
- 1...Sd8
- 2.Bxd8#
- 1...Kxf6!
- threat
- 1.Qd3?
- threat
- 2.Sd5#
- 1...Bxf6
- 2.Sfg6#
- 1...Sf7
- 2.Rxf7#
- 1...Rb5
- 2.Sc6#
- 1...Rxd3!
- threat
- 1.Qc4?
- threat
- 2.Qe6#
- 1...Bxf6
- 2.Sfg6#
- 2.Seg6#
- 1...Sxc4
- 2.Rf7#
- 1...Sxf5
- 2.Rf7#
- 2.Qf7#
- 1...Sf7
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd5
- 2.Sxd5#
- 1...Sb5
- 2.Rf7#
- 2.Qf7#
- 1...Sc8
- 2.Rf7#
- 2.Qf7#
- 1...Se8
- 2.Rf7#
- 2.Qf7#
- 1...Sc5
- 2.d8Q#
- 1...Sd8!
- threat
- 1.Qa1?
- threat
- 2.Seg6#
- 1...Bxf6
- 2.Sfg6#
- 1...Sxf5
- 2.Rf7#
- 1...Rdb2
- 2.Sd5#
- 1...Rbb2
- 2.Sc6#
- 1...Rd4!
- threat
- 1.d8B+?
- 1...Ke8
- 2.Bd7#
- 2.Rxh8#
- 1...Sxd8!
- 1...Ke8
- 1.Kg5?
- Keys
- 1.Be6!
- threat
- 2.Sfg6#
- 1...Bxf6
- 2.Seg6#
- 1...Rf2
- 2.Sd5#
- 1...Sf5
- 2.Rf7#
- threat
- 1.Be6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 20
- Sets
- R(a);N_GUARD::S(B)
- R(a);N_GUARD::S(B),XR(a)
- R(d);N_GUARD::S(D)
- R(d);N_GUARD::S(D),XR(d)
- B(h);SBLOCK,XR(F)::S(B)
- S(e);N_GUARD::R1(F)
- S(e);N_GUARD,XB(E)::R1(F)
- S(e);N_GUARD::R1(F),XS(e)
- S(f);N_GUARD::P=Q
- Tries
- Try
- K(C);P-FLIGHT
- Threat
- DUALS(2)
- Vars
- S(e);CHECK,N_GUARD::R1(F),XS(e)
- Refutation
- B(h);CHECK,XR(F)
- Try
- S(B);
- Threat
- S(D)
- Vars
- S(e);N_GUARD,XB(E)::R1(F)
- Refutation
- B(h);XR(F)
- Try
- B(E);XP(c)
- Threat
- S(B)
- Vars
- R(a);N_GUARD::S(B)
- S(e);N_GUARD::R1(F)
- Refutation
- B(h);XR(F)
- Try
- B(E);
- Threat
- S(B)
- Vars
- R(a);N_GUARD::S(B)
- S(e);N_GUARD::R1(F)
- Refutation
- B(h);XR(F)
- Try
- B(H);XR(d)
- Threat
- S(D)
- Vars
- B(h);SBLOCK,XR(F)::S(B)
- S(e);N_GUARD,XB(E)::R1(F)
- S(e);N_GUARD::R1(F),XS(e)
- R(a);N_GUARD::S(B)
- S(f);N_GUARD::P=Q
- Refutation
- S(f);
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- B(h);XS(D)::S(B)
- Refutation
- K(g);S_FLIGHT,XR(F)
- Try
- R(G);XB(h)
- Threat
- R1(F)
- Vars
- S(e);N_GUARD,XB(E)::R1(F)
- S(e);N_GUARD::R1(F)
- S(e);N_GUARD::R1(F),XS(e)
- S(f);N_GUARD::B(H),XS(f)
- Refutation
- K(g);S_FLIGHT,XR(F)
- Try
- Q(A);
- Threat
- S(B)
- Vars
- B(h);SBLOCK,XR(F)::S(B)
- S(e);N_GUARD::R1(F),XS(e)
- R(d);N_GUARD::S(D)
- Refutation
- R(a);XQ(A)
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- S(e);N_GUARD,XQ(A)::R1(F)
- R(a);N_GUARD::S(B),XR(a)
- S(f);N_GUARD::P=Q
- Refutation
- S(f);
- Try
- Q(A);
- Threat
- S(D)
- Vars
- B(h);SBLOCK,XR(F)::S(B)
- S(e);N_GUARD,XB(E)::R1(F)
- R(a);N_GUARD::S(B)
- R(d);N_GUARD::S(D)
- Refutation
- R(a);
- Try
- P(I);CHECK
- Refutation
- S(f);XB(I)
- Try
- Actual
- B(E);
- Threat
- S(B)
- Vars
- B(h);SBLOCK,XR(F)::S(D)
- R(a);N_GUARD::S(B)
- S(e);N_GUARD::R1(F)
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