MESON Chess Problem Database
Problem Display
PID: 205558 (5Q2/7k/5P2/5nK1/8/8/8/8 w - - 0 1)
Lazard, Frederic
La Strategie, 1925
#2
3 + 2
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Se3
- 2.Qg7#
- 1...Sg3
- 2.Qg7#
- 1...Sd4
- 2.Qg7#
- 1...Sh4
- 2.Qg7#
- 1...Sd6
- 2.Qg7#
- 1...Sh6
- 2.Qg7#
- 1...Se7
- 2.Qg7#
- 1...Sg7
- 2.Qxg7#
- 1...Se3
- Tries
- 1.Kf4?
- 1...Sg7
- 2.Qxg7#
- 1...Se3
- 2.Qg7#
- 1...Sg3
- 2.Qg7#
- 1...Sd4
- 2.Qg7#
- 1...Sh4
- 2.Qg7#
- 1...Sd6
- 2.Qg7#
- 1...Sh6
- 2.Qg7#
- 1...Se7
- 2.Qg7#
- 1...Kg6!
- 1...Sg7
- 1.Kh5?
- 1...Sg7+
- 2.Qxg7#
- 1...Se3
- 2.Qg7#
- 1...Sd4
- 2.Qg7#
- 1...Sh4
- 2.Qg7#
- 1...Sd6
- 2.Qg7#
- 1...Sh6
- 2.Qg7#
- 1...Se7
- 2.Qg7#
- 1...Sg3+!
- 1...Sg7+
- 1.Qf7+?
- 1...Sg7
- 2.Qxg7#
- 1...Kh8!
- 1...Sg7
- 1.Kf4?
- Keys
- 1.f7!
- threat
- 2.Qg8#
- 1...Sh6
- 2.Qxh6#
- 1...Se7
- 2.Qh6#
- threat
- 1.f7!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 6
- Sets
- S(a);N_GUARD::QAR1(C)
- S(a);N_GUARD::QAR1(C),XS(a)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- S(a);N_GUARD::QAR1(C),XS(a)
- S(a);N_GUARD::QAR1(C)
- Refutation
- K(b);S_FLIGHT
- Try
- K(A);P-FLIGHT
- Vars
- S(a);CHECK,N_GUARD::QAR1(C),XS(a)
- S(a);N_GUARD::QAR1(C)
- Refutation
- S(a);CHECK
- Try
- Q(C);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
- Refutation
- K(b);P-FLIGHT
- Try
- Actual
- P(B);
- Threat
- QAB1(C)
- Vars
- S(a);N_GUARD::QAR1(C),XS(a)
- S(a);N_GUARD::QAR1(C)
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).