MESON Chess Problem Database
Problem Display
PID: 18592 (1r2bB2/3PR3/1P1kq2N/N1p2R2/1pP5/3K4/8/n2Q4 w - - 0 1)
Kapralos, Demetrius N
Arbejder-Skak, 1957
#2
10 + 7
| 273 | Mat Plus | 1994 |
| 5454 | Near Snap | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxc4+
- 2.Kxc4#
- 1...Qd5+
- 2.Rxd5#
- 1...Qxf5+
- 2.Sxf5#
- 1...Qxd7
- 2.Ke2#
- 2.Ke3#
- 2.Ke4#
- 2.Rd5#
- 1...Qe1
- 2.Rd5#
- 1...Qe2+
- 2.Kxe2#
- 1...Qe3+
- 2.Kxe3#
- 1...Qe4+
- 2.Kxe4#
- 1...Qf6
- 2.Rd5#
- 2.Rxf6#
- 1...Qg6
- 2.Ke2#
- 2.Ke3#
- 2.Ke4#
- 1...Qxh6
- 2.Rd5#
- 1...Rxb6
- 2.dxe8S#
- 1...Rb7
- 2.dxe8S#
- 1...Qxc4+
- Tries
- 1.dxe8Q?
- threat
- 2.Rxe6#
- 2.Rd7#
- 2.Qc6#
- 2.Qxb8#
- 1...Qxc4+
- 2.Kxc4#
- 2.Sxc4#
- 1...Qd5+
- 2.Rxd5#
- 1...Qxf5+
- 2.Sxf5#
- 1...Qe2+
- 2.Kxe2#
- 2.Rxe2#
- 1...Qe3+
- 2.Kxe3#
- 2.Rxe3#
- 1...Qe4+
- 2.Kxe4#
- 2.Rxe4#
- 1...Qxh6
- 2.Rd5#
- 2.Re6#
- 2.Rd7#
- 2.Rg7#
- 2.Qc6#
- 2.Qd7#
- 2.Qxb8#
- 1...Qxe7
- 2.Qc6#
- 2.Qxe7#
- 1...Rxb6
- 2.Rd7#
- 1...Qd7
- 2.Ke2#
- 2.Ke3#
- 2.Ke4#
- 2.Sf7#
- 2.Rd5#
- 2.Re6#
- 2.Rxd7#
- 2.Qxd7#
- 1...Qf7
- 2.Sxf7#
- 2.Re6#
- 2.Rd7#
- 2.Rexf7#
- 2.Qc6#
- 2.Qd7#
- 2.Qxb8#
- 1...Qc8
- 2.Ke2#
- 2.Ke3#
- 2.Ke4#
- 2.Sf7#
- 2.Rd5#
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Ree5#
- 2.Re6#
- 2.Ra7#
- 2.Rb7#
- 2.Rc7#
- 2.Rd7#
- 2.Ref7#
- 2.Rg7#
- 2.Rh7#
- 1...Qg8
- 2.Re6#
- 2.Rd7#
- 2.Qc6#
- 2.Qd7#
- 2.Qxb8#
- 1...Qe1
- 2.Sf7#
- 2.Rd5#
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Ree5#
- 2.Re6#
- 2.Rd7#
- 2.Qc6#
- 2.Qd7#
- 2.Qxb8#
- 1...Qe5
- 2.Sf7#
- 2.Rexe5#
- 2.Re6#
- 2.Rd7#
- 2.Qc6#
- 2.Qd7#
- 2.Qxb8#
- 1...Qf6
- 2.Rd5#
- 2.Rxf6#
- 2.Re6#
- 2.Rd7#
- 2.Qc6#
- 2.Qd7#
- 2.Qxb8#
- 1...Qg6
- 2.Ke2#
- 2.Ke3#
- 2.Ke4#
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Re6#
- 2.Ra7#
- 2.Rb7#
- 2.Rc7#
- 2.Rd7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qc6#
- 2.Qxg6#
- 2.Qd7#
- 2.Qxb8#
- 1...Rb7
- 2.Sxb7#
- 2.Rxe6#
- 2.Rd7#
- 2.Qc6#
- 1...Ra8
- 2.Sb7#
- 2.Rxe6#
- 2.Rd7#
- 2.Qc6#
- 1...Rc8
- 2.Sb7#
- 2.Rxe6#
- 2.Rd7#
- 1...Rd8
- 2.Sb7#
- 2.Rxe6#
- 2.Rd7#
- 2.Qc6#
- 1...Rxe8!
- threat
- 1.d8Q+?
- 1...Qd7
- 2.Ke2#
- 2.Ke3#
- 2.Ke4#
- 2.Rd5#
- 2.Rf6#
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Ree5#
- 2.Rxe8#
- 1...Bd7
- 2.Rxd7#
- 2.Qc7#
- 2.Qxb8#
- 1...Rxd8!
- 1...Qd7
- 1.d8R+?
- 1...Qd7
- 2.Ke2#
- 2.Ke3#
- 2.Ke4#
- 2.Rd5#
- 2.Rf6#
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Ree5#
- 2.Rexe8#
- 1...Bd7
- 2.Rexd7#
- 1...Rxd8!
- 1...Qd7
- 1.dxe8Q?
- Keys
- 1.Qa4!
- threat
- 2.Qc6#
- 1...Qxc4+
- 2.Sxc4#
- 1...Qd5+
- 2.Rxd5#
- 1...Qxf5+
- 2.Sxf5#
- 1...Qe2+
- 2.Rxe2#
- 1...Qe3+
- 2.Rxe3#
- 1...Qe4+
- 2.Rxe4#
- 1...Qxd7
- 2.Rd5#
- 1...Rxb6
- 2.dxe8S#
- 1...Bxd7
- 2.Rxd7#
- 1...Rc8
- 2.Sb7#
- threat
- 1.Qa4!
Anticipated by 239944(1949)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- Q(e);CHECK,XP(C)::QAR(A)+K(B),XQ(e)
- Q(e);CHECK,N_GUARD::R1(E),XQ(e)
- Q(e);CHECK,XR(E)::S(G),XQ(e)
- Q(e);N_GUARD::R1(E)
- Q(e);CHECK::QAR(A)+K(B),XQ(e)
- Q(e);N_GUARD,XS(G)::R1(E)
- R(f);N_GUARD,XP(F)::PXB(g)=S
- R(f);N_GUARD::PXB(g)=S
- Tries
- Try
- P(H);XB(g)
- Threat
- DUALS(4)
- Vars
- Q(e);CHECK,N_GUARD::R1(E),XQ(e)
- Q(e);CHECK,XR(E)::S(G),XQ(e)
- R(f);XP(F)::B(J)+R(I),DCHECK
- Refutation
- R(f);XQ(H)
- Try
- P(H);CHECK
- Refutation
- R(f);XQ(H)
- Try
- P(H);CHECK
- Vars
- B(g);P_SPINB(g)::B(J)+R(I),DCHECK,XB(g)
- Refutation
- R(f);XR(H)
- Try
- Actual
- Q(A);
- Threat
- QAR1(A)
- Vars
- Q(e);CHECK,XP(C)::S(D),XQ(e)
- Q(e);CHECK,N_GUARD::R1(E),XQ(e)
- Q(e);CHECK,XR(E)::S(G),XQ(e)
- Q(e);CHECK,OGATE::B(J)+R(I),XQ(e)
- Q(e);N_GUARD,XP(H)::R1(E)
- R(f);N_GUARD,XP(F)::PXB(g)=S
- B(g);OGATE,XP(H)::B(J)+R(I),DCHECK,XB(g)
- R(f);N_GUARD::S(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).