MESON Chess Problem Database
Problem Display
PID: 176331 (R3r1r1/1RN1k1PQ/1N6/2n3P1/3P2P1/6B1/B1b5/6K1 w - - 0 1)
Hannelius, Jan Ingvar
Schach-Echo, 1976
#2
12 + 5
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Ref8
- 2.gxf8Q#
- 2.gxf8B#
- 1...Rxg7
- 2.Rxe8#
- 2.Qxg7#
- 1...Rgf8
- 2.g8S#
- 1...Sd3
- 2.Sb5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 1...Sa4
- 2.Sb5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 1...Se4
- 2.Sb5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 1...Sa6
- 2.Sxa6#
- 1...Se6
- 2.Scd5#
- 2.Sxe6#
- 1...Ref8
- Tries
- 1.Sb5+?
- 1...Sd7
- 2.Bd6#
- 2.Rxd7#
- 1...Sxb7!
- 1...Sd7
- 1.Sa6+?
- 1...Sd7
- 2.Rxd7#
- 1...Sxb7!
- 1...Sd7
- 1.Se6+?
- 1...Sd7
- 2.Rxd7#
- 1...Sxb7!
- 1...Sd7
- 1.Sxe8+?
- 1...Sd7
- 2.Bd6#
- 2.Rxd7#
- 1...Sxb7!
- 1...Sd7
- 1.Qe4+?
- 1...Sxe4
- 2.Sb5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 1...Se6
- 2.Sb5#
- 2.Scd5#
- 2.Sa6#
- 2.Sxe6#
- 2.Sxe8#
- 2.Qxe6#
- 1...Bxe4!
- 1...Sxe4
- 1.Qf5?
- threat
- 2.Sbd5#
- 2.Scd5#
- 2.Qxc5#
- 2.Qf6#
- 2.Qf7#
- 1...Rxa8
- 2.Qf6#
- 1...Rxg7
- 2.Sbd5#
- 2.Scd5#
- 2.Rxe8#
- 2.Qxc5#
- 2.Qf6#
- 1...Sxb7
- 2.Sbd5#
- 2.Scd5#
- 2.Qe6#
- 2.Qd7#
- 2.Qe5#
- 2.Qf6#
- 2.Qf7#
- 1...Rb8
- 2.Qf6#
- 1...Rc8
- 2.Qf6#
- 1...Rd8
- 2.Qf6#
- 2.Qf7#
- 1...Ref8
- 2.Sbd5#
- 2.Scd5#
- 2.Qxc5#
- 1...Rgf8
- 2.Sbd5#
- 2.Scd5#
- 2.Qxc5#
- 1...Bb3
- 2.Scd5#
- 2.Qf6#
- 1...Be4
- 2.Scd5#
- 2.Qxc5#
- 2.Qf6#
- 2.Qf7#
- 1...Sb3
- 2.Sbd5#
- 2.Sb5#
- 2.Scd5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 2.Qe6#
- 2.Qd7#
- 2.Qf6#
- 1...Sd3
- 2.Sbd5#
- 2.Sb5#
- 2.Scd5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 2.Qe6#
- 2.Qd7#
- 2.Qf6#
- 2.Qf7#
- 1...Sa4
- 2.Sbd5#
- 2.Sb5#
- 2.Scd5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 2.Qe6#
- 2.Qd7#
- 2.Qe5#
- 2.Qf6#
- 2.Qf7#
- 1...Se4
- 2.Sbd5#
- 2.Sb5#
- 2.Scd5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 2.Qe6#
- 2.Qd7#
- 2.Qe5#
- 2.Qf7#
- 1...Sa6
- 2.Sbd5#
- 2.Scd5#
- 2.Sxa6#
- 2.Qe6#
- 2.Qd7#
- 2.Qe5#
- 2.Qf6#
- 2.Qf7#
- 1...Se6
- 2.Scd5#
- 2.Sxe6#
- 2.Qxe6#
- 2.Qf6#
- 1...Sd7
- 2.Sbd5#
- 2.Scd5#
- 2.Qe6#
- 2.Qxd7#
- 2.Qf7#
- 1...Bxf5!
- threat
- 1.Qg6?
- threat
- 2.Scd5#
- 2.Bd6#
- 2.Qf7#
- 2.Qd6#
- 2.Qf6#
- 1...Rxa8
- 2.Qd6#
- 2.Qf6#
- 1...Rxg7
- 2.Bd6#
- 2.Rxe8#
- 2.Qxe8#
- 2.Qd6#
- 2.Qf6#
- 2.Qxg7#
- 1...Sxb7
- 2.Scd5#
- 2.Qf7#
- 2.Qe6#
- 2.Qf6#
- 1...Rb8
- 2.Qd6#
- 2.Qf6#
- 1...Rc8
- 2.Qd6#
- 2.Qf6#
- 1...Rd8
- 2.Scd5#
- 2.Qf7#
- 2.Qf6#
- 1...Ref8
- 2.Scd5#
- 2.Bd6#
- 2.Qd6#
- 1...Rgf8
- 2.Scd5#
- 2.Bd6#
- 2.Qd6#
- 1...Bb3
- 2.Scd5#
- 2.Bd6#
- 2.Qf6#
- 1...Sb3
- 2.Sb5#
- 2.Scd5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 2.Bd6#
- 2.Qe6#
- 2.Qf6#
- 1...Se4
- 2.Sb5#
- 2.Scd5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 2.Qf7#
- 2.Qe6#
- 1...Se6
- 2.Scd5#
- 2.Sxe6#
- 2.Qxe6#
- 2.Qf6#
- 1...Sd7
- 2.Sbd5#
- 2.Scd5#
- 2.Bd6#
- 2.Qf7#
- 2.Qd6#
- 2.Qe6#
- 1...Bxg6!
- threat
- 1.Qxg8?
- threat
- 2.Scd5#
- 2.Rxe8#
- 2.Qf7#
- 2.Qxe8#
- 1...Rxa8
- 2.Scd5#
- 1...Rb8
- 2.Scd5#
- 1...Rc8
- 2.Scd5#
- 1...Rd8
- 2.Scd5#
- 2.Qf7#
- 2.Qxd8#
- 1...Rf8
- 2.Scd5#
- 2.Qxf8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Bb3
- 2.Scd5#
- 2.Rxe8#
- 2.Qxe8#
- 1...Ba4
- 2.Scd5#
- 2.Qf7#
- 1...Bg6
- 2.Scd5#
- 1...Sb3
- 2.Sb5#
- 2.Scd5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 2.Rxe8#
- 2.Qe6#
- 2.Qxe8#
- 1...Se6
- 2.Scd5#
- 2.Sxe6#
- 2.Rxe8#
- 2.Qxe6#
- 2.Qxe8#
- 1...Rxg8!
- threat
- 1.Qh6?
- threat
- 2.Scd5#
- 2.Bd6#
- 2.Qd6#
- 2.Qf6#
- 1...Rxa8
- 2.Qd6#
- 2.Qf6#
- 1...Rxg7
- 2.Bd6#
- 2.Rxe8#
- 2.Qxg7#
- 2.Qd6#
- 2.Qf6#
- 1...Sxb7
- 2.Qe6#
- 2.Qf6#
- 1...Rb8
- 2.Qd6#
- 2.Qf6#
- 1...Rc8
- 2.Qd6#
- 2.Qf6#
- 1...Bb3
- 2.Scd5#
- 2.Qf6#
- 1...Sb3
- 2.Sb5#
- 2.Scd5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 2.Qe6#
- 2.Qf6#
- 1...Se6
- 2.Scd5#
- 2.Sxe6#
- 2.Qxe6#
- 2.Qf6#
- 1...Rd8
- 2.Qf6#
- 1...Ref8
- 2.Scd5#
- 2.Bd6#
- 2.Qd6#
- 1...Rgf8
- 2.Scd5#
- 2.Bd6#
- 2.Qd6#
- 1...Se4
- 2.Sb5#
- 2.Scd5#
- 2.Sa6#
- 2.Se6#
- 2.Sxe8#
- 2.Qe6#
- 1...Sd7
- 2.Bd6#
- 2.Qd6#
- 2.Qe6#
- 1...Bg6!
- threat
- 1.Sb5+?
- Keys
- 1.g6!
- threat
- 2.Qh4#
- 1...Kf6
- 2.Bh4#
- 1...Rxg7
- 2.Qxg7#
- 1...Ref8
- 2.gxf8Q#
- 1...Rgf8
- 2.g8S#
- 1...Rh8
- 2.gxh8Q#
- 1...Se4
- 2.Sxe8#
- 1...Se6
- 2.Scd5#
- 1...Sd7
- 2.Sbd5#
- threat
- 1.g6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 1
- Sets
- R(d);OGATE::PXR(d)=Q
- R(e);OGATE,SBLOCK::P=S
- S(b);N_GUARD::R(H)+S(I),XS(b)
- Tries
- Try
- S(I);CHECK
- Refutation
- S(b);XR(H)
- Try
- S(I);CHECK
- Vars
- S(b);N_GUARD,P_SPINS(b)::R1(H),XS(b)
- Refutation
- S(b);XR(H)
- Try
- S(I);CHECK
- Vars
- S(b);N_GUARD,P_SPINS(b)::R1(H),XS(b)
- Refutation
- S(b);XR(H)
- Try
- S(I);CHECK,XR(d)
- Refutation
- S(b);XR(H)
- Try
- Q(K);CHECK
- Refutation
- B(a);XQ(K)
- Try
- Q(K);
- Threat
- DUALS(5)
- Vars
- R(d);XR(L)::QAB1(K)
- R(d);::QAB1(K)
- Refutation
- B(a);XQ(K)
- Try
- Q(K);
- Threat
- DUALS(5)
- Refutation
- B(a);XQ(K)
- Try
- Q(K);XR(e)
- Threat
- DUALS(4)
- Vars
- R(d);XR(L)::R(H)+S(I),DCHECK
- R(d);::R(H)+S(I),DCHECK
- B(a);::R(H)+S(I),DCHECK
- Refutation
- R(d);XQ(K)
- Try
- Q(K);
- Threat
- DUALS(4)
- Vars
- R(d);::QAB1(K)
- Refutation
- B(a);
- Try
- Actual
- P(F);
- Threat
- QAB(K)
- Vars
- K(c);S_FLIGHT::B(C)
- R(e);OGATE,P_SPINR(e),XP(J)::QAR2(K),XR(e)
- R(d);OGATE::PXR(d)=Q
- R(e);OGATE,SBLOCK::P=S
- R(e);OGATE::PXR(e)=Q
- S(b);N_GUARD::R(H)+S(I),XR(d)
- S(b);SBLOCK::R(H)+S(I),DCHECK
- S(b);SBLOCK::S(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).