MESON Chess Problem Database
Problem Display
PID: 231785 (8/Bn1pp2P/3Pp3/N1q1k1PK/Q3P2R/8/2P2P2/8 w - - 0 1)
Nemo, Ottmar (Weiss, Ottmar)
Deutsche Schachzeitung, 1900
#2
11 + 6
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxf2
- 2.Sc4#
- 1...Qa3
- 2.Sc4#
- 2.Qd4#
- 1...Qe3
- 2.Sc4#
- 1...Qd4
- 2.Qxd4#
- 1...Qxd6
- 2.Sc4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qxc2
- 2.Qd4#
- 1...Qc4
- 2.Sxc4#
- 1...Qxa5
- 2.Qd4#
- 1...Qb5
- 2.Qd4#
- 1...Qc6
- 2.Qd4#
- 1...Qc7
- 2.Qd4#
- 1...Qc8
- 2.Qd4#
- 1...Sxd6
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...exd6
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qxf2
- Tries
- 1.Sc6+?
- 1...Kxd6
- 2.Bb8#
- 1...Qxc6
- 2.Qd4#
- 1...dxc6!
- 1...Kxd6
- 1.Sxb7?
- threat
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qxd6
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qxa7
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qxc2
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...exd6
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qa3
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qe3
- 2.h8Q#
- 2.h8B#
- 1...Qb4
- 2.h8Q#
- 2.h8B#
- 1...Qd4
- 2.Bxd4#
- 2.Qxd4#
- 2.h8Q#
- 2.h8B#
- 1...Qb6
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qc3
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qc4
- 2.h8Q#
- 2.h8B#
- 1...Qa5
- 2.Bd4#
- 2.Qd4#
- 2.Qxa5#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qb5
- 2.Bd4#
- 2.Qxb5#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qd5
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qc6
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qc7
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qc8
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 1...Qxf2!
- threat
- 1.Bxc5?
- threat
- 2.Sc4#
- 2.Qa1#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Sxa5
- 2.Qa1#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Sxd6
- 2.Bd4#
- 2.Qa1#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...exd6
- 2.Sc4#
- 2.Bd4#
- 2.Qa1#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Sd8
- 2.Sc4#
- 2.Qa1#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Sxc5!
- threat
- 1.Qa1+?
- 1...Qd4
- 2.Sc4#
- 2.Qxd4#
- 1...Qc3
- 2.Sc4#
- 1...Kxd6!
- 1...Qd4
- 1.Qb4?
- 1...Kxd6
- 2.Bb8#
- 1...Qxf2
- 2.Sc4#
- 1...Qxd6
- 2.Sc4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qxa7
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qxc2
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qxa5
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Sxa5
- 2.Qxc5#
- 1...Sxd6
- 2.Qxc5#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...exd6
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qe3
- 2.Sc4#
- 2.h8Q#
- 2.h8B#
- 1...Qd4
- 2.Bxd4#
- 2.Qxd4#
- 2.h8Q#
- 2.h8B#
- 1...Qb6
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qc3
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qc4
- 2.Sxc4#
- 2.h8Q#
- 2.h8B#
- 1...Qb5
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qd5
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qc6
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qc7
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 2.h8Q#
- 2.h8B#
- 1...Qc8
- 2.Bd4#
- 2.Qd4#
- 2.f4#
- 1...Sd8
- 2.Qxc5#
- 1...Qxb4!
- 1...Kxd6
- 1.Sc6+?
- Keys
- 1.Qa3!
- 1...Kd4
- 2.Qb2#
- 2.Qa1#
- 1...Kxd6
- 2.Bb8#
- 1...Qxf2
- 2.Sc4#
- 1...Qxa3
- 2.Sc4#
- 1...Qxd6
- 2.Sc4#
- 2.Qg3#
- 2.h8Q#
- 2.h8B#
- 1...Qxa7
- 2.h8Q#
- 2.h8B#
- 1...Qxc2
- 2.Qg3#
- 2.h8Q#
- 2.h8B#
- 1...Qxa5
- 2.Qg3#
- 2.h8Q#
- 2.h8B#
- 1...Sxa5
- 2.Qxc5#
- 1...Sxd6
- 2.Qxc5#
- 2.h8Q#
- 2.h8B#
- 1...exd6
- 2.h8Q#
- 2.h8B#
- 1...Qe3
- 2.Sc4#
- 2.h8Q#
- 2.h8B#
- 1...Qb4
- 2.Qg3#
- 1...Qd4
- 2.Qg3#
- 2.h8Q#
- 2.h8B#
- 1...Qb6
- 2.h8Q#
- 2.h8B#
- 1...Qc3
- 2.h8Q#
- 2.h8B#
- 1...Qc4
- 2.Sxc4#
- 2.Qg3#
- 2.h8Q#
- 2.h8B#
- 1...Qb5
- 2.Qg3#
- 2.h8Q#
- 2.h8B#
- 1...Qd5
- 2.Qg3#
- 2.h8Q#
- 2.h8B#
- 1...Qc6
- 2.Qg3#
- 2.h8Q#
- 2.h8B#
- 1...Qc7
- 2.Qg3#
- 2.h8Q#
- 2.h8B#
- 1...Qc8
- 2.Qg3#
- 1...Sd8
- 2.Qxc5#
- 1...Kd4
- 1.Qa3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 8
- Sets
- Q(a);N_GUARD,XP(B)::S(F)
- Q(a);N_GUARD::S(F)
- Q(a);N_GUARD::QAB1(C),XQ(a)
- Q(a);N_GUARD,XP(A)::QAB1(C)
- Q(a);N_GUARD::S(F),XQ(a)
- Q(a);N_GUARD,XS(F)::QAB1(C)
- Q(a);N_GUARD::QAB1(C)
- Tries
- Try
- S(F);CHECK
- Vars
- K(b);P_PINP(G),S_FLIGHT,XP(I)::B(J)
- Q(a);XS(F)::QAB1(C)
- Refutation
- P(e);XS(F)
- Try
- S(F);XS(d)
- Threat
- DUALS(3)
- Vars
- Q(a);::P=Q
- Refutation
- Q(a);XP(B)
- Try
- B(J);XQ(a)
- Threat
- DUALS(6)
- Refutation
- S(d);XB(J)
- Try
- Q(C);CHECK
- Vars
- Q(a);P_SPINQ(a)::S(F)
- Refutation
- K(b);P_PINP(G),S_FLIGHT,XP(I)
- Try
- Q(C);
- Vars
- K(b);OGATEB,P_PINP(G),P_SPINQ(a),S_FLIGHT,XP(I)::B(J)
- Q(a);N_GUARD,XP(B)::S(F)
- S(d);N_GUARD,XS(F)::QAR2(C),XQ(a)
- S(d);N_GUARD::QAR2(C),XQ(a)
- Refutation
- Q(a);XQ(C)
- Try
- Actual
- Q(C);
- Vars
- K(b);OGATEB,P_PINP(G),P_SPINQ(a),S_FLIGHT,XP(I)::B(J)
- Q(a);N_GUARD,XP(B)::S(F)
- Q(a);N_GUARD,XQ(C)::S(F)
- Q(a);XB(J)::P=Q
- S(d);N_GUARD,XS(F)::QAR2(C),XQ(a)
- P(f);SBLOCK,XP(I)::P=Q
- Q(a);::QAB(C)
- Q(a);::P=Q
- S(d);N_GUARD::QAR2(C),XQ(a)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).