MESON Chess Problem Database
Problem Display
PID: 65004 (3Qr3/3n4/b1pP1pP1/2pNkB2/5NP1/K1Pn2B1/8/3Rr3 w - - 0 1)
Sydenham, Colin Peter
3rd HM., British Chess Magazine, 1986
#2
11 + 9
| 5159 | FIDE Album (1986-1988) (Annexe) | 1996 |
| 15513 | Selected Chess Problems of Colin Sydenham | 2015 |
SOLUTION
- SOUND
- Sets
- 1...Kxd6
- 2.Qc7#
- 1...Re7
- 2.Qxe7#
- 1...Rf8
- 2.Qe7#
- 1...Rg8
- 2.Qe7#
- 1...Rh8
- 2.Qe7#
- 1...Sc1
- 2.Se2#
- 2.Sg2#
- 2.Sh3#
- 2.Sh5#
- 2.Se6#
- 1...Sb2
- 2.Se2#
- 2.Sg2#
- 2.Sh3#
- 2.Sh5#
- 2.Se6#
- 1...Sf2
- 2.Se2#
- 2.Sg2#
- 2.Sh3#
- 2.Sh5#
- 2.Se6#
- 1...Sb4
- 2.Se2#
- 2.Sg2#
- 2.Sh3#
- 2.Sh5#
- 2.Se6#
- 1...Sxf4
- 2.Bxf4#
- 1...Sb6
- 2.Qxf6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...cxd5
- 2.Sxd3#
- 1...Kxd6
- Tries
- 1.Se2+?
- 1...Sf4
- 2.Bxf4#
- 1...Kxd5!
- 1...Sf4
- 1.Sg2+?
- 1...Sf4
- 2.Bxf4#
- 1...Kxd5!
- 1...Sf4
- 1.Sh3+?
- 1...Sf4
- 2.Bxf4#
- 1...Kxd5!
- 1...Sf4
- 1.Sh5+?
- 1...Sf4
- 2.Bxf4#
- 1...Kxd5!
- 1...Sf4
- 1.Se6+?
- 1...Sf4
- 2.Bxf4#
- 1...Kxd5!
- 1...Sf4
- 1.Se3?
- threat
- 2.Sxd3#
- 1...Kxd6
- 2.Se6#
- 1...Sxf4
- 2.Qxe8#
- 1...Sc1
- 2.Se2#
- 2.Sfg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Se6#
- 2.Qxe8#
- 1...Sb2
- 2.Se2#
- 2.Sfg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Se6#
- 2.Qxe8#
- 1...Sf2
- 2.Se2#
- 2.Sfg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Se6#
- 2.Qxe8#
- 1...Sb4
- 2.Se2#
- 2.Sfg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Se6#
- 2.Qxe8#
- 1...Rxe3!
- threat
- 1.Sc7?
- threat
- 2.Sxd3#
- 1...Sxf4
- 2.Qxe8#
- 1...Sc1
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Sfe6#
- 2.Qxe8#
- 1...Sb2
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Sfe6#
- 2.Qxe8#
- 1...Sf2
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Sfe6#
- 2.Qxe8#
- 1...Sb4
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Sfe6#
- 2.Qxe8#
- 1...Kxd6!
- threat
- 1.Rxe1+?
- 1...Kxd6
- 2.Qc7#
- 2.Qxd7#
- 1...Sxe1!
- 1...Kxd6
- 1.Se2+?
- Keys
- 1.Se7!
- threat
- 2.Sxd3#
- 1...Kxd6
- 2.Se2#
- 1...Rxe7
- 2.Qxe7#
- 1...Sxf4
- 2.Sxc6#
- 1...Sc1
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Se6#
- 2.Sxc6#
- 1...Sb2
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Se6#
- 2.Sxc6#
- 1...Sf2
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Se6#
- 2.Sxc6#
- 1...Sb4
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sfd5#
- 2.Sh5#
- 2.Se6#
- threat
- 1.Se7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 7
- Sets
- K(d);OGATEB,P_SPINS(h),S_FLIGHT,XP(I)::QAB1(K)
- R(i);N_GUARD::QAR2(K),XR(i)
- R(i);N_GUARD::QAR2(K)
- S(b);OGATE,P_SPINS(b),XS(E)::B(D),XS(b)
- S(h);N_GUARD::QAB1(K),XP(g)
- P(f);SBLOCK,XS(G)::B(D)+S(E),DCHECK,XS(b)
- Tries
- Try
- S(E);CHECK
- Vars
- S(b);N_GUARD,P_SPINS(b)::B(D),XS(b)
- Refutation
- K(d);P-FLIGHT,P_SPINS(b),XS(G)
- Try
- S(E);CHECK
- Vars
- S(b);N_GUARD,P_SPINS(b)::B(D),XS(b)
- Refutation
- K(d);P-FLIGHT,P_SPINS(b),XS(G)
- Try
- S(E);CHECK
- Vars
- S(b);N_GUARD,P_SPINS(b)::B(D),XS(b)
- Refutation
- K(d);P-FLIGHT,P_SPINS(b),XS(G)
- Try
- S(E);CHECK
- Vars
- S(b);N_GUARD,P_SPINS(b)::B(D),XS(b)
- Refutation
- K(d);P-FLIGHT,P_SPINS(b),XS(G)
- Try
- S(E);CHECK
- Vars
- S(b);N_GUARD,P_SPINS(b)::B(D),XS(b)
- Refutation
- K(d);P-FLIGHT,P_SPINS(b),XS(G)
- Try
- S(G);
- Threat
- B(D)+S(E),DCHECK,XS(b)
- Vars
- K(d);P_SPINS(b),S_FLIGHT,XP(I)::B(D)+S(E)
- S(b);P_SPINS(b),XS(E)::QAR(K),XR(i)
- Refutation
- R(a);XS(G)
- Try
- S(G);
- Threat
- B(D)+S(E),DCHECK,XS(b)
- Vars
- S(b);P_SPINS(b),XS(E)::QAR(K),XR(i)
- Refutation
- K(d);P_SPINS(b),S_FLIGHT,XP(I)
- Try
- R(A);CHECK,XR(a)
- Refutation
- S(b);XR(A)
- Try
- Actual
- S(G);
- Threat
- B(D)+S(E),DCHECK,XS(b)
- Vars
- K(d);P_SPINS(b),S_FLIGHT,XP(I)::B(D)+S(E)
- R(i);OGATE,XS(G)::QAR2(K),XR(i)
- S(b);P_SPINS(b),XS(E)::S(G),XP(f)
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).