MESON Chess Problem Database
Problem Display
PID: 159917 (KB6/4n3/pNB3r1/P1P4R/1p1kp2R/N2P1q2/pP1Q1P2/1b6 w - - 0 1)
Sydenham, Colin Peter
Sinfonie Scacchistiche, 1983
#2
13 + 9
| 15513 | Selected Chess Problems of Colin Sydenham | 2015 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Rxe4#
- 2.Qe3#
- 1...Qh1
- 2.Qe3#
- 1...Qg2
- 2.Qe3#
- 1...Qg4
- 2.Qe3#
- 1...Qxh5
- 2.Qe3#
- 1...Qxf2
- 2.Rxe4#
- 1...Qxd3
- 2.Rxe4#
- 1...Qe3
- 2.Qxe3#
- 2.fxe3#
- 1...Qg3
- 2.Rxe4#
- 1...Qh3
- 2.Rxe4#
- 1...Qf5
- 2.Qe3#
- 1...Qf6
- 2.Rxe4#
- 2.Qe3#
- 1...Qf7
- 2.Rxe4#
- 2.Qe3#
- 1...Qf8
- 2.Rxe4#
- 2.Qe3#
- 1...Bc2
- 2.Sxc2#
- 1...Bxd3
- 2.Sc2#
- 1...Sd5
- 2.Rxd5#
- 1...Sxc6
- 2.Rd5#
- 1...Sc8
- 2.Rd5#
- 1...Sg8
- 2.Rd5#
- 1...bxa3
- 2.Qc3#
- 1...b3
- 2.Qc3#
- 1...Qd1
- Tries
- 1.Bb5?
- threat
- 2.Qxb4#
- 1...Qxf2
- 2.Rxe4#
- 2.Qxf2#
- 1...Bxd3
- 2.Sc2#
- 1...bxa3
- 2.Qc3#
- 2.Qb4#
- 1...axb5
- 2.Sxb5#
- 1...Sd5
- 2.Rxd5#
- 1...Qf7
- 2.Rxe4#
- 2.Qe3#
- 1...Sc6
- 2.Rd5#
- 1...b3
- 2.Qc3#
- 2.Qb4#
- 1...Qxd3!
- threat
- 1.Qc2?
- threat
- 2.Be5#
- 2.Qc4#
- 1...Qxh5
- 2.Rxe4#
- 2.Qc4#
- 1...Qxf2
- 2.Rxe4#
- 1...Qxd3
- 2.Be5#
- 1...Sxc6
- 2.Rd5#
- 2.Qc4#
- 1...Qg3
- 2.Rxe4#
- 2.Qc4#
- 1...Qf4
- 2.Qc4#
- 1...Qf5
- 2.Qc4#
- 1...Qf6
- 2.Rxe4#
- 2.Qc4#
- 1...Qf7
- 2.Be5#
- 2.Rxe4#
- 1...Qf8
- 2.Rxe4#
- 2.Qc4#
- 1...Rg5
- 2.Qc4#
- 1...Rd6
- 2.Qc4#
- 1...Re6
- 2.Qc4#
- 1...Rg8
- 2.Qc4#
- 1...Sf5
- 2.Qc4#
- 1...Bxc2!
- threat
- 1.dxe4+?
- 1...Bd3
- 2.Sc2#
- 1...Qd3!
- 1...Bd3
- 1.Bb5?
- Keys
- 1.Bxe4!
- threat
- 2.Qxb4#
- 1...Qxe4+
- 2.Rxe4#
- 1...Qxf2
- 2.Qxf2#
- 1...Qxd3
- 2.Bxg6#
- 1...Rxb6
- 2.Bxf3#
- 1...Bxd3
- 2.Sc2#
- 1...bxa3
- 2.Qc3#
- 2.Qb4#
- 1...Sd5
- 2.Rxd5#
- 1...Qf7
- 2.Qe3#
- 1...Sc6
- 2.Rd5#
- 1...b3
- 2.Qc3#
- 2.Qb4#
- threat
- 1.Bxe4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 12
- Sets
- Q(c);N_GUARD::QAB1(B)
- Q(c);N_GUARD,N_SPINP(f)::QAB1(B)
- Q(c);N_GUARD,XR(I)::QAB1(B)
- Q(c);N_GUARD,XP(C)::R1(F),XP(f)
- Q(c);N_GUARD,P_SPINQ(c),XP(E)::R1(F),XP(f)
- Q(c);N_GUARD::R1(F),XP(f)
- B(a);N_GUARD::S(D),XB(a)
- B(a);N_GUARD,P_SPINB(a),XP(E)::S(D)
- S(i);N_GUARD::R1(I),XS(i)
- S(i);N_GUARD,XB(K)::R1(I)
- S(i);N_GUARD::R1(I)
- P(d);N_GUARD,XS(D)::QAB1(B)
- P(d);N_GUARD::QAB1(B)
- Tries
- Try
- B(K);
- Threat
- QAR2(B),XP(d)
- Vars
- B(a);N_GUARD,P_SPINB(a),XP(E)::S(D)
- P(g);XB(K)::S(D),XP(g)
- S(i);N_GUARD::R1(I),XS(i)
- S(i);N_GUARD::R1(I)
- Refutation
- Q(c);P_SPINQ(c),XP(E)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(c);N_GUARD,XP(C)::R1(F),XP(f)
- Q(c);XP(E)::B(M)
- Q(c);N_SPINP(f)::QAR1(B)
- Q(c);::QAR1(B)
- R(h);::QAR1(B)
- R(h);P_PINB(M)::QAR1(B)
- S(i);::QAR1(B)
- Refutation
- B(a);XQ(B)
- Try
- P(E);CHECK,XP(f)
- Vars
- B(a);P_SPINB(a)::S(D)
- Refutation
- Q(c);P_SPINQ(c)
- Try
- Actual
- B(K);P_SPINB(K),XP(f)
- Threat
- QAR2(B),XP(d)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XB(K)::R1(F),XQ(c)
- Q(c);N_PINB(K),XP(C)::QAB(B),XQ(c)
- Q(c);N_PINB(K),P_SPINQ(c),XP(E)::R(F)+B(K),XR(h)
- R(h);N_GUARD,XS(J)::R(F)+B(K),XQ(c)
- B(a);N_GUARD,P_SPINB(a),XP(E)::S(D)
- S(i);N_GUARD,N_PINB(K)::R1(I),XS(i)
- Q(c);N_GUARD,N_PINB(K)::QAB1(B)
- S(i);N_GUARD,N_PINB(K)::R1(I)
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).