MESON Chess Problem Database
Problem Display
PID: 2867 (8/3p3n/Q1pPp3/4P1pN/1N1pk1K1/7p/5P1B/2n5 w - - 0 1)
von Duben, Gustaf Henrik
Source?, 1896
#2
8 + 9
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Sa2
- 2.Qe2#
- 2.Qd3#
- 1...Se2
- 2.Qxe2#
- 2.Qd3#
- 1...Sb3
- 2.Qe2#
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sf6+
- 2.Sxf6#
- 1...Sf8
- 2.Sf6#
- 1...d3
- 2.Qc4#
- 1...c5
- 2.Qb7#
- 2.Qa8#
- 1...Sa2
- Tries
- 1.Bg3?
- 1...Sf6+
- 2.Sxf6#
- 1...d3
- 2.Qc4#
- 1...Sa2
- 2.Qe2#
- 2.Qd3#
- 1...Se2
- 2.Qxe2#
- 2.Qd3#
- 1...Sb3
- 2.Qe2#
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sf8
- 2.Sf6#
- 1...c5
- 2.Qb7#
- 2.Qa8#
- 1...h2!
- 1...Sf6+
- 1.Bf4?
- threat
- 2.Sg3#
- 2.f3#
- 1...Sf6+
- 2.Sxf6#
- 1...d3
- 2.Qc4#
- 1...Se2
- 2.Qxe2#
- 2.Qd3#
- 2.f3#
- 1...gxf4!
- threat
- 1.Qf1?
- threat
- 2.Qh1#
- 1...Sf6+
- 2.Sxf6#
- 1...d3!
- threat
- 1.Qc4?
- 1...Sf6+
- 2.Sxf6#
- 1...Sa2
- 2.Qe2#
- 2.Qd3#
- 1...Se2
- 2.Qxe2#
- 2.Qd3#
- 1...Sb3
- 2.Qe2#
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sf8
- 2.Sf6#
- 1...c5!
- 1...Sf6+
- 1.Qb5?
- threat
- 2.Sg3#
- 1...Sf6+
- 2.Sxf6#
- 1...d3
- 2.Qc4#
- 1...Se2
- 2.Qxe2#
- 2.Qd3#
- 1...c5
- 2.Qb7#
- 1...cxb5!
- threat
- 1.Qa2?
- 1...Sf6+
- 2.Sxf6#
- 1...d3
- 2.Qc4#
- 1...Se2
- 2.Qxe2#
- 1...Sb3
- 2.Qe2#
- 1...Sd3
- 2.Qe2#
- 1...Sf8
- 2.Sf6#
- 1...c5
- 2.Qa8#
- 1...Sxa2!
- 1...Sf6+
- 1.Bg3?
- Keys
- 1.Qa1!
- 1...Sf6+
- 2.Sxf6#
- 1...Sa2
- 2.Qe1#
- 2.Qh1#
- 1...Se2
- 2.Qh1#
- 1...Sb3
- 2.Qe1#
- 2.Qh1#
- 1...Sd3
- 2.Qh1#
- 1...Sf8
- 2.Sf6#
- 1...d3
- 2.Sg3#
- 1...c5
- 2.Qa8#
- 1...Sf6+
- 1.Qa1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAB1(G),XS(a)
- S(i);CHECK,N_GUARD::S(F),XS(i)
- S(i);N_GUARD::S(F)
- P(c);OGATEB::QAR2(G)
- Tries
- Try
- B(B);
- Vars
- S(i);CHECK,N_GUARD::S(F),XS(i)
- P(c);OGATEB::QAR2(G)
- S(a);N_GUARD::QAB1(G),XS(a)
- S(i);N_GUARD::S(F)
- Refutation
- P(b);
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- S(i);CHECK,N_GUARD::S(F),XS(i)
- P(c);OGATEB::QAR2(G)
- Refutation
- P(e);XB(B)
- Try
- Q(G);
- Threat
- QAB(G)
- Vars
- S(i);CHECK,N_GUARD::S(F),XS(i)
- Refutation
- P(c);
- Try
- Q(G);P_PINP(c)
- Vars
- S(i);CHECK,N_GUARD::S(F),XS(i)
- S(a);N_GUARD::QAB1(G),XS(a)
- S(i);N_GUARD::S(F)
- Refutation
- P(f);
- Try
- Q(G);
- Threat
- S(F)
- Vars
- S(i);CHECK,N_GUARD::S(F),XS(i)
- P(c);OGATEB::QAR2(G)
- P(f);OGATEB::QAB(G)
- Refutation
- P(f);XQ(G)
- Try
- Q(G);
- Vars
- S(i);CHECK,N_GUARD::S(F),XS(i)
- P(c);OGATEB::QAR2(G)
- S(a);N_GUARD::QAR2(G),XS(a)
- S(a);N_GUARD::QAR2(G)
- S(i);N_GUARD::S(F)
- P(f);OGATEB::QAB(G)
- Refutation
- S(a);XQ(G)
- Try
- Actual
- Q(G);
- Vars
- S(i);CHECK,N_GUARD::S(F),XS(i)
- S(a);OGATE::QAB(G)
- S(i);N_GUARD::S(F)
- P(c);::S(F)
- P(f);OGATEB::QAB(G)
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).