MESON Chess Problem Database
Problem Display
PID: 259456 (1r5n/1R3pPK/4Nkp1/1Q2n3/r1p4P/4R2B/5p2/b7 w - - 0 1)
Cheylan, Yves
1st HM., Die Schwalbe, 1984
#2
8 + 10
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rxb7
- 2.g8S#
- 1...Sd3
- 2.Qg5#
- 1...Sf3
- 2.Rxf3#
- 1...Sg4
- 2.Qg5#
- 1...Sc6
- 2.Rf3#
- 2.Qg5#
- 1...Sd7
- 2.Qg5#
- 1...c3
- 2.Qxe5#
- 1...g5
- 2.hxg5#
- 1...Rxb7
- Tries
- 1.Sf4?
- threat
- 2.Sd5#
- 1...Sg4
- 2.Qg5#
- 1...Rd8!
- threat
- 1.Sc5?
- threat
- 2.Se4#
- 1...Rxb7
- 2.g8S#
- 1...Sg4
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 2.Qc6#
- 1...c3!
- threat
- 1.Sd8?
- threat
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rxb7
- 2.g8S#
- 1...f1Q
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...f1S
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...f1B
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...f1R
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Ra2
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Ra3
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rb4
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Ra5
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Ra6
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Ra7
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Raa8
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rba8
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rc8
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Bb2
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Bc3
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Bd4
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sd3
- 2.Qc6#
- 2.Qg5#
- 2.Qb6#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sf3
- 2.Rxf3#
- 2.Qc6#
- 2.Qb6#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sg4
- 2.Rf3#
- 2.Qg5#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sc6
- 2.Rf3#
- 2.Qxc6#
- 2.Qg5#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sd7
- 2.Qc6#
- 2.Qg5#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...c3
- 2.Qxe5#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...g5
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rxd8!
- threat
- 1.Sf8?
- threat
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rxb7
- 2.g8S#
- 1...f1Q
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...f1S
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...f1B
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...f1R
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rd8
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Ra2
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Ra3
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rb4
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Ra5
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Ra6
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Ra7
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Raa8
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rba8
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rc8
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Re8
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Bb2
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Bc3
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Bd4
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sd3
- 2.Sd7#
- 2.Qc6#
- 2.Qg5#
- 2.Qb6#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sf3
- 2.Sd7#
- 2.Rxf3#
- 2.Qc6#
- 2.Qb6#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sg4
- 2.Sd7#
- 2.Rf3#
- 2.Qg5#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sc6
- 2.Sd7#
- 2.Rf3#
- 2.Qxc6#
- 2.Qg5#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sd7
- 2.Sxd7#
- 2.Qc6#
- 2.Qg5#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...c3
- 2.Qxe5#
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...g5
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Rxf8!
- threat
- 1.Qc5?
- threat
- 2.Qe7#
- 1...Rxb7
- 2.gxh8Q#
- 2.gxh8B#
- 2.g8S#
- 1...Sg4
- 2.Qg5#
- 1...Sc6
- 2.Rf3#
- 2.Qg5#
- 1...Sd7
- 2.Rf3#
- 2.Qg5#
- 1...Re8!
- threat
- 1.Sf4?
- Keys
- 1.Sg5!
- threat
- 2.Se4#
- 1...Rxb7
- 2.g8S#
- 1...Sg4
- 2.Rf3#
- 1...Sd7
- 2.Qc6#
- 1...c3
- 2.Qxe5#
- threat
- 1.Sg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- R(i);N_GUARD,XR(F)::P=S
- S(e);OGATE::QAB1(D)
- S(e);N_GUARD::R(A),XS(e)
- P(d);S_CUTB(a)::QAB1(D),XS(e)
- P(g);OGATE::P(C),XP(g)
- Tries
- Try
- S(E);
- Threat
- S(E)
- Vars
- S(e);OGATE::QAB1(D)
- Refutation
- R(i);
- Try
- S(E);
- Threat
- S(E)
- Vars
- R(i);N_GUARD,XR(F)::P=S
- S(e);N_GUARD::S(E)
- Refutation
- P(d);
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- R(i);XR(F)::P=S
- Refutation
- R(i);XS(E)
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- R(i);XR(F)::P=S
- Refutation
- R(i);XS(E)
- Try
- Q(D);
- Threat
- QAB1(D)
- Vars
- S(e);OGATE::QAB1(D)
- Refutation
- R(i);
- Try
- Actual
- S(E);
- Threat
- S(E)
- Vars
- R(i);N_GUARD,XR(F)::P=S
- S(e);N_GUARD::R(A)
- S(e);N_GUARD::QAR(D)
- P(d);S_CUTB(a)::QAB1(D),XS(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).