MESON Chess Problem Database
Problem Display
PID: 48321 (Kb1Q4/pr6/4pp2/R2Nk3/2P2rP1/2N1Pb1q/1B6/4RB2 w - - 0 1)
Sydenham, Colin Peter
1st Prize, Due Alfieri, 1981
#2
11 + 9
| 3752 | FIDE Album (1980-1982) | 1988 |
| 4640 | Chess Wizardry: The New ABC of Chess Problems | 1996 |
| 14475 | Mat Plus Review | 2007 |
| 133 | The Problemist Supplement | 2012 |
| 15513 | Selected Chess Problems of Colin Sydenham | 2015 |
SOLUTION
- SOUND
- Sets
- 1...Re4
- 2.Sb6#
- 1...Bd1
- 2.Sb6#
- 1...Be2
- 2.Sb6#
- 1...Be4
- 2.Sb5#
- 1...Bxg4
- 2.Sb6#
- 1...Re4
- Tries
- 1.Sb1+?
- 1...Ke4
- 2.Sd2#
- 2.Sdc3#
- 1...Rd4
- 2.exd4#
- 1...Rxb2!
- 1...Ke4
- 1.Sd1+?
- 1...Ke4
- 2.Sf2#
- 2.S5c3#
- 1...Rd4
- 2.exd4#
- 1...Rxb2!
- 1...Ke4
- 1.Sa2+?
- 1...Ke4
- 2.Sdc3#
- 1...Rd4
- 2.exd4#
- 1...Rxb2!
- 1...Ke4
- 1.Sa4+?
- 1...Ke4
- 2.Sc5#
- 2.Sdc3#
- 1...Rd4
- 2.exd4#
- 1...Rxb2!
- 1...Ke4
- 1.Se4+?
- 1...Kxe4
- 2.Sc3#
- 1...Rxb2!
- 1...Kxe4
- 1.Sb5+?
- 1...Rd4
- 2.exd4#
- 1...Ke4!
- 1...Rd4
- 1.Sb4+?
- 1...Bd5
- 2.Sd3#
- 2.Sc6#
- 1...Rb5+!
- 1...Bd5
- 1.Sxf4+?
- 1...Bd5
- 2.Sd3#
- 2.Sg6#
- 1...Rb5+!
- 1...Bd5
- 1.Sxf6+?
- 1...Rb5+
- 2.Sce4#
- 1...Bd5!
- 1...Rb5+
- 1.Se7+?
- 1...Bd5
- 2.Sc6#
- 2.Sg6#
- 1...Rb5+!
- 1...Bd5
- 1.Qxb8+?
- 1...Rc7
- 2.Qxc7#
- 1...Rxb8+!
- 1...Rc7
- 1.Sb1+?
- Keys
- 1.e4!
- threat
- 2.Sb5#
- 2.Sb6#
- 1...Kd4
- 2.Sc7#
- 1...Rxe4
- 2.Sb5#
- 1...Rxg4
- 2.Sb5#
- 1...Rxb2
- 2.Sb4#
- 1...Bxe4
- 2.Sb6#
- 1...Bxg4
- 2.Sb6#
- 1...exd5
- 2.Qxd5#
- 1...Rd7
- 2.Sb5#
- 1...Qg2
- 2.Sb6#
- 1...Qh2
- 2.Sb6#
- 1...Rf5
- 2.Sb5#
- 1...Rb3
- 2.Sb4#
- 1...Rb4
- 2.Sxb4#
- 1...Rb5
- 2.Sxb5#
- 1...Rb6
- 2.Sb5#
- 2.Sxb6#
- 1...Rc7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sa4#
- 2.Sb5#
- 2.Sxc7#
- 1...Bd1
- 2.Sb6#
- 1...Bh1
- 2.Sb6#
- 1...Be2
- 2.Sb6#
- 1...Bg2
- 2.Sb6#
- 1...Bd6
- 2.Sb5#
- threat
- 1.e4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 14
- REMOVED MATES = 0
- Sets
- R(c);S_CUTB(a)::R(H)+S(I)
- B(a);N_GUARD::R(H)+S(I)
- B(a);SBLOCK,S_CUTR(c)::B(C)+S(D)
- B(a);N_GUARD,XP(G)::R(H)+S(I)
- Tries
- Try
- S(D);CHECK
- Vars
- R(c);OGATE,P_SPINR(c)::R(A)+P(E)DCHECK,XR(c)
- Refutation
- R(h);P_PINS(I),XB(C)
- Try
- S(D);CHECK
- Vars
- R(c);OGATE,P_SPINR(c)::R(A)+P(E)DCHECK,XR(c)
- Refutation
- R(h);P_PINS(I),XB(C)
- Try
- S(D);CHECK
- Vars
- K(d);P-FLIGHT::S(I)
- R(c);OGATE,P_SPINR(c)::R(A)+P(E)DCHECK,XR(c)
- Refutation
- R(h);P_PINS(I),XB(C)
- Try
- S(D);CHECK
- Vars
- R(c);OGATE,P_SPINR(c)::R(A)+P(E)DCHECK,XR(c)
- Refutation
- R(h);P_PINS(I),XB(C)
- Try
- S(D);CHECK
- Vars
- K(d);P-FLIGHT,XS(D)::S(I)
- Refutation
- R(h);XB(C)
- Try
- S(D);CHECK
- Vars
- R(c);OGATE,P_SPINR(c)::R(A)+P(E)DCHECK,XR(c)
- Refutation
- K(d);P-FLIGHT
- Try
- S(I);CHECK
- Refutation
- R(h);CHECK,P_SPINR(h)
- Try
- S(I);CHECK,XR(c)
- Refutation
- R(h);CHECK,P_SPINR(h)
- Try
- S(I);CHECK,XP(f)
- Vars
- R(h);CHECK,P_SPINR(h)::B(C)+S(D)
- Refutation
- B(a);P_SPINB(a)
- Try
- S(I);CHECK
- Refutation
- R(h);CHECK,P_SPINR(h)
- Try
- Q(K);CHECK,XB(i)
- Vars
- R(h);N_GUARD,P_PINS(I),P_SPINR(h)::QAB(K),XR(h)
- Refutation
- R(h);CHECK,P_PINS(I),XQ(K)
- Try
- Actual
- P(E);
- Threat
- DUALS(2)
- Vars
- K(d);S_FLIGHT::QAR(K)+S(I)
- R(c);P_SPINR(c),XP(E)::B(C)+S(D)
- R(c);XP(G)::B(C)+S(D)
- R(h);N_GUARD,XB(C)::R(H)+S(I)
- B(a);P_SPINB(a),XP(E)::R(H)+S(I)
- B(a);XP(G)::R(H)+S(I)
- P(e);OGATE,P_SPINP(e),XS(I)::QAR1(K),XP(e)
- R(h);::B(C)+S(D)
- Q(b);::R(H)+S(I)
- R(c);::B(C)+S(D)
- R(h);N_GUARD::R(H)+S(I)
- R(h);N_GUARD::R(H)+S(I),XR(h)
- R(h);::B(C)+S(D),XR(h)
- B(a);::R(H)+S(I)
- B(i);::B(C)+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).