MESON Chess Problem Database
Problem Display
PID: 261315 (q7/4R1QB/1N3B1p/1b1P4/1r3k1p/r7/3P2P1/bn4NK w - - 0 1)
Jaeger, Peter R
Neue Zurcher Zeitung, 1986
#2
10 + 9
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qxd5
- 2.Sxd5#
- 1...Ra2
- 2.Sh3#
- 1...Rc3
- 2.Be5#
- 1...Rd3
- 2.Se2#
- 1...Re3
- 2.dxe3#
- 1...Rh3+
- 2.Sxh3#
- 1...Raa4
- 2.Sh3#
- 1...Ra5
- 2.Sh3#
- 1...Ra6
- 2.Sh3#
- 1...Ra7
- 2.Sh3#
- 1...Rb2
- 2.Be5#
- 2.Re4#
- 1...Rb3
- 2.Re4#
- 1...Rc4
- 2.Se2#
- 1...Rd4
- 2.Be5#
- 1...Re4
- 2.Rxe4#
- 1...Bc3
- 2.Sh3#
- 1...Bd4
- 2.Re4#
- 1...Be5
- 2.Bxe5#
- 1...Be2
- 2.Sxe2#
- 1...Bd3
- 2.Sh3#
- 1...Ba4
- 2.Se2#
- 1...Bc4
- 2.Re4#
- 1...Bc6
- 2.Se2#
- 1...Bd7
- 2.Se2#
- 1...Be8
- 2.Se2#
- 1...Sc3
- 2.Sh3#
- 2.Be5#
- 1...h5
- 2.Qg5#
- 1...Qxd5
- Tries
- 1.Bxa1?
- threat
- 2.Be5#
- 2.Rf7#
- 1...Rh3+
- 2.Sxh3#
- 1...Qxd5
- 2.Sxd5#
- 1...Rxa1
- 2.Sh3#
- 2.Rf7#
- 1...Qc6
- 2.Be5#
- 1...Qb7
- 2.Be5#
- 1...Qa7
- 2.Be5#
- 1...Qb8
- 2.Rf7#
- 1...Qc8
- 2.Be5#
- 1...Qd8
- 2.Be5#
- 1...Qe8
- 2.Be5#
- 1...Qf8
- 2.Be5#
- 1...Qg8
- 2.Be5#
- 1...Rc3
- 2.Rf7#
- 1...Re3
- 2.Rf7#
- 2.dxe3#
- 1...Ra7
- 2.Sh3#
- 2.Be5#
- 1...Rb2
- 2.Re4#
- 2.Rf7#
- 1...Rd4
- 2.Rf7#
- 1...Re4
- 2.Rxe4#
- 2.Rf7#
- 1...Bd3
- 2.Sh3#
- 2.Be5#
- 1...Bd7
- 2.Se2#
- 2.Be5#
- 1...Be8
- 2.Se2#
- 2.Be5#
- 1...Sc3
- 2.Sh3#
- 2.Rf7#
- 1...Sxd2!
- threat
- 1.Bc3?
- threat
- 2.Sh3#
- 2.Rf7#
- 1...Qxd5
- 2.Sh3#
- 2.Sxd5#
- 1...Rxc3
- 2.Rf7#
- 1...Bxc3
- 2.Sh3#
- 1...Sxd2
- 2.Sh3#
- 1...Qc6
- 2.Sh3#
- 1...Qb7
- 2.Sh3#
- 1...Qa7
- 2.Sh3#
- 1...Qd8
- 2.Sh3#
- 1...Qe8
- 2.Sh3#
- 1...Qf8
- 2.Sh3#
- 1...Qg8
- 2.Sh3#
- 1...Ra7
- 2.Sh3#
- 1...Bd3
- 2.Sh3#
- 1...Bd7
- 2.Se2#
- 1...Be8
- 2.Se2#
- 2.Sh3#
- 1...h3
- 2.Sxh3#
- 2.Rf7#
- 2.g3#
- 1...Qc8!
- threat
- 1.Bd4?
- threat
- 2.Re4#
- 2.Rf7#
- 1...Rh3+
- 2.Sxh3#
- 1...Qxd5
- 2.Sxd5#
- 1...Rxd4
- 2.Rf7#
- 1...Bxd4
- 2.Re4#
- 1...Sxd2
- 2.Rf7#
- 1...Qc6
- 2.Re4#
- 1...Qb7
- 2.Re4#
- 1...Qa7
- 2.Re4#
- 1...Qc8
- 2.Re4#
- 1...Qd8
- 2.Re4#
- 1...Qf8
- 2.Re4#
- 1...Qg8
- 2.Re4#
- 1...Re3
- 2.Bxe3#
- 2.Rf7#
- 2.dxe3#
- 1...Ra7
- 2.Sh3#
- 2.Be3#
- 2.Re4#
- 1...Bd3
- 2.Sh3#
- 2.Be3#
- 1...Bd7
- 2.Se2#
- 2.Re4#
- 1...Be8
- 2.Se2#
- 2.Re4#
- 1...Sc3
- 2.Sh3#
- 2.Be3#
- 2.Be5#
- 2.Rf7#
- 1...Qe8!
- threat
- 1.Rf7?
- threat
- 2.Bxa1#
- 2.Bb2#
- 2.Bc3#
- 2.Bd4#
- 2.Be5#
- 1...Rh3+
- 2.Sxh3#
- 1...Qxd5
- 2.Sxd5#
- 2.Be5#
- 1...Sxd2
- 2.Bd4#
- 1...Qc6
- 2.Be5#
- 1...Qb7
- 2.Be5#
- 1...Qa7
- 2.Be5#
- 1...Qc8
- 2.Be5#
- 1...Qd8
- 2.Be5#
- 1...Qe8
- 2.Be5#
- 1...Qf8
- 2.Be5#
- 1...Qg8
- 2.Be5#
- 1...Rc3
- 2.Bxc3#
- 2.Bd4#
- 2.Bxh4#
- 2.Be5#
- 2.Be7#
- 2.Bd8#
- 1...Ra7
- 2.Sh3#
- 2.Be5#
- 1...Rb2
- 2.Bxb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bxh4#
- 2.Be5#
- 2.Be7#
- 2.Bd8#
- 1...Rd4
- 2.Bxd4#
- 2.Bxh4#
- 2.Be5#
- 2.Be7#
- 2.Bd8#
- 1...Bb2
- 2.Bxb2#
- 2.Bc3#
- 2.Bd4#
- 2.Be5#
- 1...Bc3
- 2.Sh3#
- 2.Bxc3#
- 2.Bd4#
- 2.Be5#
- 1...Bd4
- 2.Bxd4#
- 2.Be5#
- 1...Be5
- 2.Bxe5#
- 1...Bd3
- 2.Sh3#
- 2.Be5#
- 1...Bd7
- 2.Se2#
- 2.Be5#
- 1...Be8
- 2.Se2#
- 2.Be5#
- 1...Sc3
- 2.Sh3#
- 2.Bxc3#
- 2.Bd4#
- 2.Bxh4#
- 2.Be5#
- 2.Be7#
- 2.Bd8#
- 1...Bxf6!
- threat
- 1.Qxh6+?
- 1...Kg4
- 2.Rg7#
- 2.Qg5#
- 2.Qxh4#
- 1...Kg3!
- 1...Kg4
- 1.d3?
- threat
- 2.Se2#
- 2.Sh3#
- 1...Rxd3
- 2.Se2#
- 1...Bxd3
- 2.Sh3#
- 1...Re4
- 2.Rxe4#
- 1...Qc8
- 2.Se2#
- 1...Ra2
- 2.Sh3#
- 1...Rb2
- 2.Sh3#
- 2.Re4#
- 1...Bd7
- 2.Se2#
- 1...Sc3
- 2.Sh3#
- 1...h3
- 2.Se2#
- 2.Sxh3#
- 2.g3#
- 1...Be5!
- threat
- 1.Bxa1?
- Keys
- 1.Sc4!
- threat
- 2.Se2#
- 2.Re4#
- 1...Rh3+
- 2.Sxh3#
- 1...Qxd5
- 2.Se2#
- 1...Rxc4
- 2.Se2#
- 1...Bxc4
- 2.Re4#
- 1...Sxd2
- 2.Se2#
- 1...Qe8
- 2.Se2#
- 1...Re3
- 2.dxe3#
- 1...Be5
- 2.Se2#
- 2.Bxe5#
- 1...Sc3
- 2.Sh3#
- 2.Be5#
- threat
- 1.Sc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 20
- Sets
- Q(i);P_PINP(D),XP(E)::S(F),XQ(i)
- R(c);N_GUARD::S(A)
- R(c);S_CUTB(a)::B(G)
- R(c);S_CUTB(g)::S(A)
- R(c);OGATE::P(C),XR(c)
- R(c);CHECK,N_GUARD::S(A),XR(c)
- R(d);N_GUARD::R1(H)
- R(d);S_CUTB(g)::S(A)
- R(d);S_CUTB(a)::B(G)
- R(d);N_GUARD::R1(H),XR(d)
- B(a);S_CUTR(c)::S(A)
- B(a);S_CUTR(d)::R1(H)
- B(a);N_GUARD::B(G),XB(a)
- B(g);N_GUARD::S(A),XB(g)
- B(g);S_CUTR(c)::S(A)
- B(g);N_GUARD::S(A)
- B(g);S_CUTR(d)::R1(H)
- P(h);N_GUARD::QAB1(I)
- Tries
- Try
- B(G);XB(a)
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,N_GUARD::S(A),XR(c)
- Q(i);P_PINP(D),XP(E)::S(F),XQ(i)
- Q(i);::B(G)
- Q(i);::R(H)
- R(c);::R(H)
- R(d);::R(H)
- Refutation
- S(b);XP(C)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- R(c);XB(G)::R(H)
- B(a);XB(G)::S(A)
- S(b);XP(C)::S(A)
- Q(i);::S(A)
- R(c);::S(A)
- B(g);::S(A)
- B(g);N_GUARD::S(A)
- Refutation
- Q(i);
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,N_GUARD::S(A),XR(c)
- Q(i);P_PINP(D),XP(E)::S(F),XQ(i)
- R(d);XB(G)::R(H)
- B(a);XB(G)::R1(H)
- S(b);XP(C)::R(H)
- Q(i);::R1(H)
- Refutation
- Q(i);
- Try
- R(H);
- Threat
- DUALS(5)
- Vars
- R(c);CHECK,N_GUARD::S(A),XR(c)
- S(b);XP(C)::R(H)+B(G)
- Q(i);::R(H)+B(G),DCHECK
- B(a);::R(H)+B(G),DCHECK,XB(a)
- Refutation
- B(a);P_SPINB(a),XB(G)
- Try
- Q(I);CHECK,XP(h)
- Refutation
- K(e);S_FLIGHT
- Try
- P(C);
- Threat
- DUALS(2)
- Vars
- R(c);XP(C)::S(A)
- B(g);XP(C)::S(A)
- R(d);N_GUARD::R1(H),XR(d)
- Q(i);::S(A)
- R(c);::S(A)
- B(g);::S(A)
- S(b);::S(A)
- Refutation
- B(a);
- Try
- Actual
- S(F);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,N_GUARD::S(A),XR(c)
- Q(i);P_PINP(D),XP(E)::S(A)
- R(d);XS(F)::S(A)
- B(g);XS(F)::R1(H)
- S(b);XP(C)::S(A)
- Q(i);::S(A)
- R(c);OGATE::P(C),XR(c)
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