MESON Chess Problem Database
Problem Display
PID: 241408 (b7/1r4pK/1p2kprb/1B1N2p1/1BRP4/1Q2N2n/1p6/1q6 w - - 0 1)
Hjelle, David
Parallele 50, 1949
#2
8 + 12
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Tries
- 1.Sf4+?
- 1...Kf7
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc7#
- 2.Rc8#
- 1...gxf4
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc7#
- 2.Rc8#
- 1...Sxf4!
- 1...Kf7
- 1.Sxb6?
- threat
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Kf7
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc7#
- 2.Rc8#
- 1...f5
- 2.Rc6#
- 1...Qa2
- 2.Rc6#
- 1...Qc2
- 2.Rxc2#
- 2.Rc6#
- 1...Qd3
- 2.Rc6#
- 1...Qe4
- 2.Rc6#
- 1...Qf5
- 2.Rc6#
- 1...Qc1
- 2.Rxc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc6#
- 1...Qd1
- 2.Rc2#
- 2.Rc6#
- 1...Qf1
- 2.Rc6#
- 1...Qh1
- 2.Rc6#
- 1...Ra7
- 2.Rc6#
- 1...Rc7
- 2.Rc6#
- 1...Rd7
- 2.Rc6#
- 1...Re7
- 2.Rc6#
- 1...Rf7
- 2.Rc6#
- 1...Rb8
- 2.Rc6#
- 1...Sf4
- 2.Rc6#
- 1...Rxb6!
- threat
- 1.Sc7+?
- 1...Kf7
- 2.Be8#
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc6#
- 1...Rxc7!
- 1...Kf7
- 1.Rc1?
- threat
- 2.Sc3#
- 2.Sf4#
- 2.Sxb6#
- 2.Sc7#
- 2.Se7#
- 1...Kf7
- 2.Sc3#
- 2.Sf4#
- 2.Sxb6#
- 2.Sc7#
- 1...Qxc1
- 2.Sc3#
- 2.Sf4#
- 2.Sc7#
- 1...bxc1Q
- 2.Sf4#
- 2.Sc7#
- 1...bxc1S
- 2.Sf4#
- 2.Sc7#
- 1...bxc1B
- 2.Sf4#
- 2.Sc7#
- 1...bxc1R
- 2.Sf4#
- 2.Sc7#
- 1...Qa2
- 2.Sf4#
- 2.Sc7#
- 1...Qc2
- 2.Sf4#
- 2.Sc7#
- 1...Qd3
- 2.Sf4#
- 2.Sc7#
- 1...Qe4
- 2.Sf4#
- 2.Sc7#
- 1...Qf5
- 2.Sf4#
- 2.Sc7#
- 1...Ra7
- 2.Sf4#
- 2.Sc7#
- 1...Rc7
- 2.Sf4#
- 2.Sxc7#
- 1...Rd7
- 2.Sf4#
- 2.Sc7#
- 1...Re7
- 2.Sf4#
- 2.Sc7#
- 1...Rf7
- 2.Sf4#
- 2.Sc7#
- 1...Rb8
- 2.Sf4#
- 2.Sc7#
- 1...Sf4
- 2.Sxf4#
- 2.Sc7#
- 1...f5!
- threat
- 1.Rc2?
- threat
- 2.Sc3#
- 2.Sf4#
- 2.Sxb6#
- 2.Sc7#
- 2.Se7#
- 1...Kf7
- 2.Sc3#
- 2.Sf4#
- 2.Sxb6#
- 2.Sc7#
- 1...Qxc2
- 2.Sf4#
- 2.Sc7#
- 1...Qa2
- 2.Sf4#
- 2.Sc7#
- 1...Qf1
- 2.Sf4#
- 2.Sc7#
- 1...Qh1
- 2.Sf4#
- 2.Sc7#
- 1...Ra7
- 2.Sf4#
- 2.Sc7#
- 1...Rc7
- 2.Sf4#
- 2.Sxc7#
- 1...Rd7
- 2.Sf4#
- 2.Sc7#
- 1...Re7
- 2.Sf4#
- 2.Sc7#
- 1...Rf7
- 2.Sf4#
- 2.Sc7#
- 1...Rb8
- 2.Sf4#
- 2.Sc7#
- 1...Sf4
- 2.Sxf4#
- 2.Sc7#
- 1...f5!
- threat
- 1.Rc3?
- threat
- 2.Sf4#
- 2.Sxb6#
- 2.Sc7#
- 2.Se7#
- 1...Kf7
- 2.Sf4#
- 2.Sxb6#
- 2.Sc7#
- 1...Qa2
- 2.Sf4#
- 2.Sc7#
- 1...Qc2
- 2.Sf4#
- 2.Sc7#
- 1...Qd3
- 2.Sf4#
- 2.Sc7#
- 1...Qe4
- 2.Sf4#
- 2.Sc7#
- 1...Qf5
- 2.Sf4#
- 2.Sc7#
- 1...Qd1
- 2.Sf4#
- 2.Sc7#
- 1...Qf1
- 2.Sf4#
- 2.Sc7#
- 1...Qh1
- 2.Sf4#
- 2.Sc7#
- 1...Ra7
- 2.Sf4#
- 2.Sc7#
- 1...Rc7
- 2.Sf4#
- 2.Sxc7#
- 1...Rd7
- 2.Sf4#
- 2.Sc7#
- 1...Re7
- 2.Sf4#
- 2.Sc7#
- 1...Rf7
- 2.Sf4#
- 2.Sc7#
- 1...Rb8
- 2.Sf4#
- 2.Sc7#
- 1...Sf4
- 2.Sxf4#
- 2.Sc7#
- 1...f5!
- threat
- 1.Rc6+?
- 1...Kf7
- 2.Sxf6#
- 2.Sc7#
- 1...Kd7!
- 1...Kf7
- 1.Rc7?
- threat
- 2.Sc3#
- 2.Sf4#
- 2.Sxb6#
- 2.Se7#
- 1...Rxc7
- 2.Sf4#
- 2.Sxc7#
- 1...Qa2
- 2.Sf4#
- 1...Qc2
- 2.Sf4#
- 1...Qd3
- 2.Sf4#
- 1...Qe4
- 2.Sf4#
- 1...Qf5
- 2.Sf4#
- 1...Qc1
- 2.Sc3#
- 2.Sf4#
- 1...Qd1
- 2.Sf4#
- 1...Qf1
- 2.Sf4#
- 1...Qh1
- 2.Sf4#
- 1...Ra7
- 2.Sf4#
- 1...Rb8
- 2.Sf4#
- 2.Re7#
- 1...Sf4
- 2.Sxf4#
- 1...f5!
- threat
- 1.Rc8?
- threat
- 2.Sc3#
- 2.Sf4#
- 2.Sxb6#
- 2.Sc7#
- 2.Se7#
- 1...Kf7
- 2.Sc3#
- 2.Sf4#
- 2.Sxb6#
- 2.Sc7#
- 2.Se7#
- 1...Qa2
- 2.Sf4#
- 2.Sc7#
- 1...Qc2
- 2.Sf4#
- 2.Sc7#
- 1...Qd3
- 2.Sf4#
- 2.Sc7#
- 1...Qe4
- 2.Sf4#
- 2.Sc7#
- 1...Qf5
- 2.Sf4#
- 2.Sc7#
- 1...Qc1
- 2.Sc3#
- 2.Sf4#
- 2.Sc7#
- 1...Qd1
- 2.Sf4#
- 2.Sc7#
- 1...Qf1
- 2.Sf4#
- 2.Sc7#
- 1...Qh1
- 2.Sf4#
- 2.Sc7#
- 1...Ra7
- 2.Sf4#
- 2.Sc7#
- 1...Rc7
- 2.Sf4#
- 2.Sxc7#
- 1...Rd7
- 2.Sf4#
- 2.Sc7#
- 1...Re7
- 2.Sf4#
- 2.Sc7#
- 1...Rf7
- 2.Sf4#
- 2.Sc7#
- 1...Rb8
- 2.Sf4#
- 2.Sc7#
- 1...Sf4
- 2.Sxf4#
- 2.Sc7#
- 1...f5!
- threat
- 1.Sf4+?
- Keys
- 1.Sxf6!
- threat
- 2.Rc6#
- 1...Rxf6+
- 2.Rc2#
- 1...gxf6+
- 2.Rc7#
- 1...Kxf6
- 2.Rc6#
- 1...Kf7
- 2.Rc6#
- threat
- 1.Sxf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Tries
- Try
- S(G);CHECK
- Refutation
- S(c);XS(G)
- Try
- S(G);XP(e)
- Threat
- DUALS(6)
- Vars
- P(g);::QAB(A)+R(D),DCHECK
- Q(a);::QAB(A)+R(D),DCHECK
- R(j);::QAB(A)+R(D),DCHECK
- R(j);SBLOCK::QAB(A)+R(D),DCHECK
- S(c);::QAB(A)+R(D),DCHECK
- Refutation
- R(j);XS(G)
- Try
- S(G);CHECK
- Refutation
- R(j);XS(G)
- Try
- R(D);
- Threat
- DUALS(5)
- Refutation
- P(g);
- Try
- R(D);
- Threat
- DUALS(5)
- Refutation
- P(g);
- Try
- R(D);
- Threat
- DUALS(4)
- Refutation
- P(g);
- Try
- R(D);CHECK
- Refutation
- K(f);S_FLIGHT
- Try
- R(D);
- Threat
- DUALS(4)
- Vars
- Q(a);::QAB(A)+S(G),DCHECK
- R(j);::QAB(A)+S(G),DCHECK
- S(c);::QAB(A)+S(G),DCHECK,XS(c)
- Refutation
- P(g);
- Try
- R(D);
- Threat
- DUALS(5)
- Refutation
- P(g);
- Try
- Actual
- S(G);XP(g)
- Threat
- QAB(A)+R(D),DCHECK
- Vars
- R(h);CHECK,SBLOCK,XS(G)::QAB(A)+R(D)
- P(k);CHECK,SBLOCK,XS(G)::QAB(A)+R(D)
- K(f);P-FLIGHT,XS(G)::R(D)
- K(f);S_FLIGHT::QAB(A)+R(D)
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).