MESON Chess Problem Database
Problem Display
PID: 261588 (6n1/1Q3qn1/1p1R2b1/1N1Np1B1/4k1B1/8/K3P3/8 w - - 0 1)
Johner, Hans
Neue Zurcher Zeitung, 1925
#2
8 + 7
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qxd5+
- 2.Qxd5#
- 1...Qe8
- 2.Sdc3#
- 2.Sf6#
- 1...Qf1
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 1...Qf2
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 1...Qf3
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 1...Qf5
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 1...Qf6
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sxf6#
- 2.Sdc7#
- 2.Se7#
- 1...Qxb7
- 2.Sdc3#
- 1...Qc7
- 2.Sdc3#
- 2.Sf6#
- 2.Sdxc7#
- 1...Qd7
- 2.Sdc3#
- 2.Sf6#
- 1...Qe7
- 2.Sdc3#
- 2.Sf6#
- 2.Sdc7#
- 2.Sxe7#
- 1...Qf8
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 1...Bf5
- 2.Bf3#
- 1...Sf5
- 2.Bf3#
- 1...Se6
- 2.Sdc3#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 1...Qxd5+
- Tries
- 1.Kb2?
- threat
- 2.Sdc3#
- 2.Sf6#
- 1...Qxd5
- 2.Qxd5#
- 1...Qxb7
- 2.Sdc3#
- 1...Qf6
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sxf6#
- 2.Sdc7#
- 2.Se7#
- 1...Sf6
- 2.Sdc3#
- 2.Sxf6#
- 1...Qf4!
- threat
- 1.Ka3?
- threat
- 2.Sdc3#
- 2.Sf6#
- 1...Qf3+
- 2.Sdc3#
- 2.Se3#
- 1...Qxd5
- 2.Qxd5#
- 1...Qxb7
- 2.Sdc3#
- 1...Qf6
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sxf6#
- 2.Sdc7#
- 2.Se7#
- 1...Sf6
- 2.Sdc3#
- 2.Sxf6#
- 1...Qf4!
- threat
- 1.Bf3+?
- 1...Qxf3
- 2.Se3#
- 2.Se7#
- 1...Kf5!
- 1...Qxf3
- 1.Qc6?
- threat
- 2.Qc2#
- 2.Qc4#
- 1...Qxd5+
- 2.Qxd5#
- 1...Qf2
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 2.Qc2#
- 1...Qf3
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 2.Qc4#
- 1...Qc7
- 2.Sdc3#
- 2.Sf6#
- 2.Sdxc7#
- 1...Sf5
- 2.Bf3#
- 2.Qc2#
- 1...Se6
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 2.Qc2#
- 1...Qa7+!
- threat
- 1.Qa8?
- threat
- 2.Qa4#
- 1...Qxd5+
- 2.Qxd5#
- 1...Qf2
- 2.Sdc3#
- 2.Se3#
- 2.Sb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 1...Qc7
- 2.Sdc3#
- 2.Sf6#
- 2.Sdxc7#
- 1...Sf5
- 2.Bf3#
- 1...Se6
- 2.Sdc3#
- 2.Sf6#
- 2.Sdc7#
- 2.Se7#
- 1...Qa7+!
- threat
- 1.Qxf7?
- threat
- 2.Sdc3#
- 2.Bf3#
- 2.Qf3#
- 1...Bf5
- 2.Sdc3#
- 2.Bf3#
- 1...Bh5
- 2.Sdc3#
- 2.Qf3#
- 1...Sf5
- 2.Sdc3#
- 2.Bf3#
- 1...Sf6
- 2.Sdc3#
- 2.Sxf6#
- 1...Bxf7!
- threat
- 1.Kb2?
- Keys
- 1.Rc6!
- threat
- 2.Rc4#
- 1...Kxd5
- 2.Rc7#
- 1...Qxb7
- 2.Sdc3#
- 1...Qf2
- 2.Sdc3#
- 1...Qc7
- 2.Sdc3#
- 1...Sf5
- 2.Bf3#
- 1...Se6
- 2.Sdc3#
- threat
- 1.Rc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAB1(H),XQ(e)
- Q(e);N_PINS(E),XQ(H)::S(E)
- B(d);SBLOCK,S_CUTQ(e)::B(C)
- S(f);SBLOCK,S_CUTQ(e)::B(C)
- Tries
- Try
- K(A);N_SPINS(E),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(e);OGATE,P_SPINQ(e),XS(E)::QAB1(H),XQ(e)
- Q(e);XQ(H)::S(E)
- Refutation
- Q(e);
- Try
- K(A);N_SPINS(E),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(e);OGATE,P_SPINQ(e),XS(E)::QAB1(H),XQ(e)
- Q(e);XQ(H)::S(E)
- Refutation
- Q(e);
- Try
- B(C);CHECK
- Refutation
- K(a);S_FLIGHT
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAB1(H),XQ(e)
- Refutation
- Q(e);CHECK,N_PINS(E)
- Try
- Q(H);
- Threat
- QAR(H)
- Vars
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAB1(H),XQ(e)
- S(f);SBLOCK,S_CUTQ(e)::B(C)
- Refutation
- Q(e);CHECK,N_PINS(E)
- Try
- Q(H);N_SPINS(E),XQ(e)
- Threat
- DUALS(3)
- Refutation
- B(d);P_PINS(E),XQ(H)
- Try
- Actual
- R(G);
- Threat
- R(G)
- Vars
- K(a);OGATEB,S_FLIGHT,XS(E)::QAB(H)+R(G)
- Q(e);N_PINS(E),XQ(H)::S(E)
- Q(e);N_PINS(E),P_PINP(B)::S(E)
- Q(e);N_PINS(E)::S(E)
- S(f);SBLOCK,S_CUTQ(e)::B(C)
- S(f);N_PINS(E)::S(E)
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).