MESON Chess Problem Database
Problem Display
PID: 158825 (KbB2q2/1p5r/7n/1R3n1N/1Q1PkN1p/8/P2PP3/B5r1 w - - 0 1)
Sydenham, Colin Peter
The Problemist, 1974
#2
11 + 9
| 15513 | Selected Chess Problems of Colin Sydenham | 2015 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Qxb1#
- 1...Rg2
- 2.Qb1#
- 1...Rg4
- 2.Qb1#
- 1...Rg5
- 2.Qb1#
- 1...Rg6
- 2.Qb1#
- 1...Rgg7
- 2.Qb1#
- 1...Rg8
- 2.Qb1#
- 1...Rc7
- 2.Re5#
- 1...Rh8
- 2.Bxb7#
- 1...Be5
- 2.Rxe5#
- 1...Ba7
- 2.Re5#
- 1...Se3
- 2.d3#
- 1...Sxd4
- 2.Qxd4#
- 1...Sd6
- 2.Re5#
- 1...Se7
- 2.d5#
- 1...Sg7
- 2.Bxb7#
- 1...Sf7
- 2.Bxf5#
- 2.Bxb7#
- 1...Rb1
- Tries
- 1.Sg2?
- threat
- 2.d3#
- 1...Rxg2
- 2.Qb1#
- 1...Qc5
- 2.Sf6#
- 1...Rd1!
- threat
- 1.Sd5?
- threat
- 2.Sc3#
- 2.d3#
- 1...Qxb4
- 2.Sdf6#
- 2.Shf6#
- 2.d3#
- 1...Qxc8
- 2.Sdf6#
- 2.Shf6#
- 2.d3#
- 1...Sxd4
- 2.Sc3#
- 2.Qxd4#
- 1...Qc5
- 2.Sdf6#
- 2.Shf6#
- 1...Rc1
- 2.d3#
- 1...Rd1
- 2.Sc3#
- 1...Rc7
- 2.d3#
- 1...Rg3!
- threat
- 1.Bxf5+?
- 1...Qxf5
- 2.d5#
- 1...Sxf5!
- 1...Qxf5
- 1.Qc5?
- threat
- 2.Qc2#
- 2.Qd5#
- 1...Qxc8
- 2.Qd5#
- 1...Rxa1
- 2.Qd5#
- 1...Sxd4
- 2.Qxd4#
- 2.Qd5#
- 1...Rg3
- 2.Qd5#
- 1...Qd6
- 2.Qc2#
- 1...Qf7
- 2.Qc2#
- 1...Qd8
- 2.Qc2#
- 1...Qg8
- 2.Qc2#
- 1...Rc1
- 2.Qd5#
- 1...Rc7
- 2.Qd5#
- 2.Qe5#
- 1...Rd7
- 2.Qc2#
- 1...Se3
- 2.d3#
- 1...Se7
- 2.Qc2#
- 1...Qxc5!
- threat
- 1.Qb3?
- threat
- 2.Qc2#
- 2.Qd5#
- 2.Qd3#
- 2.Qf3#
- 1...Qxc8
- 2.Qd5#
- 2.Qd3#
- 2.Qf3#
- 1...Rxa1
- 2.Qd5#
- 2.Qd3#
- 1...Sxd4
- 2.Qd5#
- 2.Qd3#
- 2.Qe3#
- 1...Rg3
- 2.Qd5#
- 1...Qc5
- 2.Qd3#
- 2.Qf3#
- 1...Qd6
- 2.Qc2#
- 2.Qd3#
- 2.Qf3#
- 1...Qf7
- 2.Qc2#
- 2.Qd3#
- 2.Qf3#
- 1...Qd8
- 2.Qc2#
- 2.Qd3#
- 2.Qf3#
- 1...Qg8
- 2.Qc2#
- 2.Qd3#
- 2.Qf3#
- 1...Rc1
- 2.Qd5#
- 2.Qd3#
- 2.Qf3#
- 1...Rf1
- 2.Qc2#
- 2.Qd5#
- 2.Qd3#
- 1...Rc7
- 2.Re5#
- 2.Qd5#
- 2.Qe6#
- 2.Qd3#
- 2.Qf3#
- 1...Rd7
- 2.Qc2#
- 2.Qd3#
- 2.Qf3#
- 1...Se3
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Se7
- 2.Qc2#
- 2.Qd3#
- 2.Qe3#
- 2.Qf3#
- 1...Qa3+!
- threat
- 1.Qc4?
- threat
- 2.Qd3#
- 2.Qd5#
- 2.Qc2#
- 1...Qxc8
- 2.Qd3#
- 2.Qd5#
- 1...Rxa1
- 2.Qd3#
- 2.Qd5#
- 1...Sxd4
- 2.Qd3#
- 2.Qd5#
- 2.Qxd4#
- 1...Rg3
- 2.Qd5#
- 1...Qc5
- 2.Qd3#
- 1...Qd6
- 2.Qd3#
- 2.Qc2#
- 1...Qf7
- 2.Qd3#
- 2.Qc2#
- 1...Qd8
- 2.Qd3#
- 2.Qc2#
- 1...Qg8
- 2.Qd3#
- 2.Qc2#
- 1...Rc1
- 2.Qd3#
- 2.Qd5#
- 1...Rc7
- 2.Re5#
- 2.Qd3#
- 2.Qd5#
- 2.Qe6#
- 1...Rd7
- 2.Qd3#
- 2.Qc2#
- 1...Se3
- 2.Qd3#
- 2.d3#
- 1...Se7
- 2.Qd3#
- 2.Qc2#
- 2.d5#
- 1...Qa3+!
- threat
- 1.d5+?
- 1...Sd4
- 2.Qxd4#
- 1...Qxb4!
- 1...Sd4
- 1.Sg2?
- Keys
- 1.Sh3!
- threat
- 2.Sf2#
- 1...Sxd4
- 2.Qxd4#
- 1...Qc5
- 2.Sf6#
- 1...Rf1
- 2.Sg5#
- 1...Rg2
- 2.Qb1#
- 1...Bg3
- 2.Sg5#
- 1...Se3
- 2.d3#
- 1...Sg3
- 2.Sg5#
- 1...Sd6
- 2.Re5#
- 1...Se7
- 2.d5#
- 1...Sg7
- 2.Bxb7#
- 1...Sg4
- 2.Sg5#
- threat
- 1.Sh3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 10
- Sets
- R(a);N_GUARD::QAB(E),XR(a)
- R(a);N_GUARD::QAB(E)
- R(g);S_CUTB(h)::R1(H)
- R(g);N_GUARD::B(K),XP(f)
- B(h);N_GUARD,P_PINB(K)::R1(H),XB(h)
- B(h);N_GUARD,P_PINB(K)::R1(H)
- S(d);SBLOCK::P(C)
- S(d);OGATE,P_SPINS(d),XP(F)::QAR1(E),XS(d)
- S(d);S_CUTB(h)::R1(H)
- S(d);N_GUARD,S_CUTQ(i)::QAR(E)+P(F)
- S(d);S_CUTR(g)::B(K),XP(f)
- Tries
- Try
- S(G);
- Threat
- P(C)
- Vars
- R(a);N_GUARD,XS(G)::QAB(E)
- Q(i);N_GUARD::S(I)
- Refutation
- R(a);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- R(a);::P(C)
- R(a);::S(G)
- R(g);::P(C)
- Refutation
- R(a);
- Try
- B(K);CHECK,XS(d)
- Vars
- Q(i);SBLOCK,XB(K)::QAR(E)+P(F)
- Refutation
- S(e);XB(K)
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- Q(i);XB(K)::QAB1(E)
- R(a);P_PINP(B),XB(A)::QAB1(E)
- R(a);::QAB1(E)
- Q(i);::QAB(E)
- R(g);::QAB(E)
- S(d);SBLOCK::P(C)
- S(d);::QAB(E)
- Refutation
- Q(i);XQ(E)
- Try
- Q(E);
- Threat
- DUALS(4)
- Vars
- R(a);::QAB1(E)
- Refutation
- Q(i);CHECK
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- R(a);::QAB1(E)
- Q(i);::QAB1(E)
- Refutation
- Q(i);CHECK
- Try
- P(F);CHECK
- Vars
- S(d);N_GUARD,P_SPINS(d)::QAR1(E),XS(d)
- Refutation
- Q(i);XQ(E)
- Try
- Actual
- S(G);
- Threat
- S(G)
- Vars
- S(d);OGATE,P_SPINS(d),XP(F)::QAR1(E),XS(d)
- Q(i);N_GUARD::S(I)
- R(a);N_GUARD::S(G)
- R(a);N_GUARD::QAB(E)
- B(h);P_PINB(K),S_CUTR(a)::S(G)
- S(d);SBLOCK::P(C)
- S(d);S_CUTR(a)::S(G)
- S(d);S_CUTB(h)::R1(H)
- S(d);N_GUARD,S_CUTQ(i)::QAR(E)+P(F)
- S(d);S_CUTR(g)::B(K),XP(f)
- S(e);S_CUTR(a)::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).