MESON Chess Problem Database
Problem Display
PID: 22422 (1nn4q/2NP2P1/1P1k4/Npp2B2/2p1R3/3p2b1/3Q4/2K3R1 w - - 0 1)
Blackburne, SS
The Times Weekly Edition, 0000
#2
10 + 9
| 2794 | Terms & Themes of Chess Problems | 1907 |
SOLUTION
- SOUND
- Sets
- 1...Qxg7
- 2.dxc8S#
- 1...Qh1
- 2.dxc8S#
- 1...Qh2
- 2.dxc8S#
- 1...Qh3
- 2.dxc8S#
- 1...Qh4
- 2.dxc8S#
- 1...Qh5
- 2.dxc8S#
- 1...Qh6
- 2.Qxh6#
- 2.dxc8S#
- 1...Qh7
- 2.dxc8S#
- 1...Qe8
- 2.dxe8S#
- 1...Be1
- 2.Rg6#
- 2.Qf4#
- 1...Bf2
- 2.Rg6#
- 2.Qf4#
- 1...Bh2
- 2.Rg6#
- 1...Bf4
- 2.Rg6#
- 2.Qxf4#
- 1...Bh4
- 2.Qf4#
- 1...Sc6
- 2.Sb7#
- 1...Sxd7
- 2.Re6#
- 1...c3
- 2.Qxd3#
- 1...Qxg7
- Tries
- 1.Rxg3?
- threat
- 2.Rg6#
- 2.Qf4#
- 1...Qxg7
- 2.dxc8S#
- 1...Sxd7
- 2.Re6#
- 1...Sxb6
- 2.Qf4#
- 1...Qh4
- 2.dxc8S#
- 1...Qh5
- 2.Qf4#
- 2.dxc8S#
- 1...Qh6
- 2.Qxh6#
- 2.dxc8S#
- 1...Qh7
- 2.Qf4#
- 2.dxc8S#
- 1...Qd8
- 2.Qf4#
- 1...Qe8
- 2.dxe8S#
- 1...Qf8
- 2.Qf4#
- 1...Qg8
- 2.Qf4#
- 1...Sc6
- 2.Sb7#
- 2.Rg6#
- 1...Se7
- 2.Qf4#
- 1...Qh1+!
- threat
- 1.Qe3?
- threat
- 2.Qxg3#
- 1...d2+
- 2.Qxd2#
- 1...Qxg7
- 2.dxc8S#
- 1...Sxd7
- 2.Re6#
- 1...Qh2
- 2.dxc8S#
- 1...Qh3
- 2.dxc8S#
- 1...Qh4
- 2.dxc8S#
- 1...Qh6
- 2.Qxh6#
- 2.dxc8S#
- 1...Qe8
- 2.dxe8S#
- 1...Be1
- 2.Rg6#
- 2.Qf4#
- 1...Bf2
- 2.Rg6#
- 2.Qf4#
- 1...Bh2
- 2.Rg6#
- 1...Bf4
- 2.Rg6#
- 2.Qxf4#
- 1...Bh4
- 2.Qf4#
- 1...Sc6
- 2.Sb7#
- 1...Be5!
- threat
- 1.Qg5?
- threat
- 2.Qf6#
- 2.Qxg3#
- 2.Qg6#
- 1...Bf4+
- 2.Qxf4#
- 1...d2+
- 2.Qxd2#
- 1...Qxg7
- 2.dxc8S#
- 1...Sxd7
- 2.Re6#
- 1...Sxb6
- 2.Qxg3#
- 1...Qh2
- 2.Qf6#
- 2.Qg6#
- 2.dxc8S#
- 1...Qh3
- 2.Qf6#
- 2.Qg6#
- 2.dxc8S#
- 1...Qh4
- 2.dxc8S#
- 1...Qh5
- 2.Qf6#
- 2.Qxg3#
- 2.dxc8S#
- 1...Qh6
- 2.Qxh6#
- 2.dxc8S#
- 1...Qh7
- 2.Qf6#
- 2.Qxg3#
- 2.dxc8S#
- 1...Qd8
- 2.Qxg3#
- 1...Qe8
- 2.dxe8S#
- 1...Qf8
- 2.Qxg3#
- 1...Qg8
- 2.Qxg3#
- 1...Be1
- 2.Qf4#
- 2.Qf6#
- 2.Qg6#
- 1...Bf2
- 2.Qf4#
- 2.Qf6#
- 2.Qg6#
- 1...Bh2
- 2.Qf6#
- 2.Qg6#
- 1...Bh4
- 2.Qf4#
- 1...Sc6
- 2.Sb7#
- 2.Qf6#
- 2.Qg6#
- 1...Se7
- 2.Qf6#
- 2.Qxe7#
- 2.Qxg3#
- 1...Be5!
- threat
- 1.d8Q+?
- 1...Sd7
- 2.Re6#
- 2.Qxd7#
- 1...Qxd8!
- 1...Sd7
- 1.d8R+?
- 1...Sd7
- 2.Re6#
- 2.Rxd7#
- 1...Qxd8!
- 1...Sd7
- 1.gxh8Q?
- threat
- 2.Qdh6#
- 2.Qf6#
- 2.Qhh6#
- 2.dxc8S#
- 1...Sxd7
- 2.Re6#
- 1...Be5
- 2.Qxe5#
- 2.dxc8S#
- 1...Bf4
- 2.Rg6#
- 2.Qxf4#
- 2.Qf6#
- 2.dxc8S#
- 1...Bh4
- 2.Qf4#
- 2.Qe5#
- 2.dxc8S#
- 1...Sa7
- 2.Qdh6#
- 2.Qf6#
- 2.Qhh6#
- 2.Qf8#
- 1...Se7
- 2.Qf6#
- 1...Sxb6!
- threat
- 1.gxh8S?
- threat
- 2.Sf7#
- 2.Qh6#
- 2.dxc8S#
- 1...Sxd7
- 2.Sf7#
- 2.Re6#
- 1...Be5
- 2.dxc8S#
- 1...Bf4
- 2.Sf7#
- 2.Rg6#
- 2.Qxf4#
- 2.dxc8S#
- 1...Bh4
- 2.Sf7#
- 2.Qf4#
- 2.dxc8S#
- 1...Sa7
- 2.Sf7#
- 2.Qh6#
- 1...Se7
- 2.Sf7#
- 1...Sxb6!
- threat
- 1.Rxg3?
- Keys
- 1.Qh2!
- threat
- 2.Qxg3#
- 1...Qh6+
- 2.Qxh6#
- 1...Bf4+
- 2.Qxf4#
- 1...d2+
- 2.Qxd2#
- 1...Qxg7
- 2.dxc8S#
- 1...Qxh2
- 2.dxc8S#
- 1...Bxh2
- 2.Rg6#
- 1...Sxd7
- 2.Re6#
- 1...Be5
- 2.Qxe5#
- 1...Qh3
- 2.dxc8S#
- 1...Qh4
- 2.dxc8S#
- 1...Qe8
- 2.dxe8S#
- 1...Sc6
- 2.Sb7#
- threat
- 1.Qh2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- Q(i);N_GUARD,XP(J)::PXS(h)=S
- Q(i);N_GUARD,P_PINR(B)::PXS(h)=S
- Q(i);N_GUARD::PXS(h)=S
- Q(i);OGATE::PXQ(i)=S
- B(b);OGATE::R(B)
- B(b);N_GUARD::QAB(C)
- S(g);SBLOCK::S(E)
- S(g);SBLOCK,XP(I)::R1(D)
- P(c);N_GUARD::QAR(C),XP(a)
- Tries
- Try
- R(B);XB(b)
- Threat
- DUALS(2)
- Vars
- Q(i);N_GUARD,XP(J)::PXS(h)=S
- S(g);SBLOCK,XP(I)::R1(D)
- S(h);XP(G)::QAB(C)
- Q(i);N_GUARD::PXS(h)=S
- Q(i);::QAB(C)
- Q(i);OGATE::PXQ(i)=S
- S(h);::QAB(C)
- Refutation
- Q(i);CHECK
- Try
- Q(C);N_PINP(a)
- Threat
- QAB(C),XB(b)
- Vars
- P(a);CHECK,OGATEB::QAR(C),XP(a)
- Q(i);N_GUARD,XP(J)::PXS(h)=S
- S(g);SBLOCK,XP(I)::R1(D)
- Q(i);N_GUARD::PXS(h)=S
- Q(i);OGATE::PXQ(i)=S
- B(b);OGATE::R(B)
- B(b);N_GUARD::QAB(C)
- S(g);SBLOCK::S(E)
- Refutation
- B(b);
- Try
- Q(C);N_PINP(a)
- Threat
- DUALS(3)
- Vars
- B(b);CHECK,N_GUARD::QAB(C),XB(b)
- P(a);CHECK,OGATEB::QAR(C),XP(a)
- Q(i);N_GUARD,XP(J)::PXS(h)=S
- S(g);SBLOCK,XP(I)::R1(D)
- S(h);XP(G)::QAB(C),XB(b)
- Q(i);N_GUARD::PXS(h)=S
- Q(i);::QAB(C),XB(b)
- Q(i);OGATE::PXQ(i)=S
- B(b);N_GUARD::QAB(C)
- Refutation
- B(b);
- Try
- P(I);CHECK
- Refutation
- Q(i);XQ(I)
- Try
- P(I);CHECK
- Refutation
- Q(i);XR(I)
- Try
- P(J);XQ(i)
- Threat
- DUALS(4)
- Vars
- S(g);SBLOCK,XP(I)::R1(D)
- S(h);::QAR2(J)
- Refutation
- S(h);XP(G)
- Try
- P(J);XQ(i)
- Threat
- DUALS(3)
- Vars
- B(b);::PXS(h)=S
- S(h);::S(J)
- Refutation
- S(h);XP(G)
- Try
- Actual
- Q(C);N_PINP(a),P_PINB(b)
- Threat
- QAB(C),XB(b)
- Vars
- Q(i);CHECK,N_GUARD::QAR(C),XQ(i)
- B(b);CHECK,OGATE::QAB(C),XB(b)
- P(a);CHECK,OGATEB::QAR(C),XP(a)
- Q(i);N_GUARD,XP(J)::PXS(h)=S
- Q(i);N_GUARD,N_SPINB(b),XQ(C)::PXS(h)=S
- B(b);N_SPINB(b),OGATE,XQ(C)::R(B)
- S(g);SBLOCK,XP(I)::R1(D)
- B(b);OGATE::QAB1(C),XB(b)
- Q(i);N_GUARD::PXS(h)=S
- Q(i);OGATE::PXQ(i)=S
- S(g);SBLOCK::S(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).