MESON Chess Problem Database
Problem Display
PID: 251783 (Q7/3Kn1p1/3n4/4k1P1/2P3p1/2p1P1N1/8/8 w - - 0 1)
Hahnel, Peter
Deutsche Schachzeitung, 1984
#2
6 + 6
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Sxc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb5
- 2.Qe4#
- 1...Sdf5
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sdc8
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Sd5
- 2.Qxd5#
- 1...Sef5
- 2.Qd5#
- 1...Sg6
- 2.Qd5#
- 1...Sec8
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...c2
- 2.Qa1#
- 1...g6
- 2.Qh8#
- 1...Sxc4
- Tries
- 1.Qf3?
- threat
- 2.Qf4#
- 1...Sxc4
- 2.Qe4#
- 1...Sd5
- 2.Qxd5#
- 1...Sg6
- 2.Qd5#
- 1...gxf3!
- threat
- 1.Qc6?
- threat
- 2.Qxd6#
- 1...Sxc4
- 2.Qe4#
- 2.Qe6#
- 1...Se4
- 2.Qxe4#
- 2.Qe6#
- 1...Sb5
- 2.Qe4#
- 2.Qe6#
- 1...Sdf5
- 2.Qe4#
- 2.Qe6#
- 1...Sb7
- 2.Qe4#
- 2.Qe6#
- 1...Sf7
- 2.Qe4#
- 2.Qe6#
- 1...Sdc8
- 2.Qe4#
- 2.Qe6#
- 1...Se8
- 2.Qe4#
- 2.Qe6#
- 1...Sef5
- 2.Qd5#
- 2.Qc5#
- 1...Sec8
- 2.Qd5#
- 2.Qc5#
- 1...Sxc6!
- threat
- 1.Qa5+?
- 1...Sd5
- 2.Qxd5#
- 1...Sb5!
- 1...Sd5
- 1.Qg8?
- threat
- 2.Qe6#
- 2.Qxg7#
- 1...Sxc4
- 2.Qe6#
- 1...Sdf5
- 2.Qe6#
- 1...Se4
- 2.Qe6#
- 1...Sf7
- 2.Qxg7#
- 1...Se8
- 2.Qe6#
- 1...Sd5
- 2.Qxd5#
- 2.Qe6#
- 1...Sef5
- 2.Qd5#
- 2.Qe6#
- 1...g6
- 2.Qe6#
- 2.Qg7#
- 2.Qh8#
- 1...Sxg8!
- threat
- 1.Qf3?
- Keys
- 1.Qh1!
- 1...Sxc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb5
- 2.Qe4#
- 1...Sdf5
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sdc8
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Sd5
- 2.Qxd5#
- 1...Sef5
- 2.Qd5#
- 1...Sc6
- 2.Qd5#
- 1...Sg6
- 2.Qd5#
- 1...Sec8
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...c2
- 2.Qa1#
- 1...g6
- 2.Qh8#
- 1...Sxc4
- 1.Qh1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(d);N_GUARD,XP(C)::QAR1(F)
- S(d);N_GUARD::QAR1(F),XS(d)
- S(d);N_GUARD::QAR1(F)
- S(e);N_GUARD::QAR1(F),XS(e)
- S(e);N_GUARD::QAR1(F)
- P(a);OGATEB::QAB(F)
- P(f);OGATEB::QAB(F)
- Tries
- Try
- Q(F);
- Threat
- QAB1(F)
- Vars
- S(d);N_GUARD,XP(C)::QAR1(F)
- S(e);N_GUARD::QAR1(F),XS(e)
- S(e);N_GUARD::QAR1(F)
- Refutation
- P(b);XQ(F)
- Try
- Q(F);
- Threat
- QAB1(F),XS(d)
- Refutation
- S(e);XQ(F)
- Try
- Q(F);CHECK
- Vars
- S(e);N_GUARD,P_SPINS(e)::QAR1(F),XS(e)
- Refutation
- S(d);P_SPINS(d)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- S(d);XP(C)::QAR1(F)
- S(d);::QAR1(F)
- S(d);::QAB(F),XP(f)
- Refutation
- S(e);XQ(F)
- Try
- Actual
- Q(F);
- Vars
- S(d);N_GUARD,XP(C)::QAR1(F)
- S(d);N_GUARD::QAR1(F),XS(d)
- S(d);N_GUARD::QAR1(F)
- S(e);N_GUARD::QAR1(F),XS(e)
- S(e);N_GUARD::QAR1(F)
- P(a);OGATEB::QAB(F)
- P(f);OGATEB::QAB(F)
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).