MESON Chess Problem Database
Problem Display
PID: 185330 (6qn/1N1R4/Q4B2/4nPpb/1Pr1k3/Kp4PN/3P4/3B1R2 w - - 0 1)
Andrade, Barry Jack da Costa
The Observer, 1931
(First published on Sun Apr 19 1931)
#2
12 + 8
| 98 | Manchester Guardian | 1959 |
| 15239 | Valois Notebooks | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qe6
- 2.Sxg5#
- 1...Qf7
- 2.Sxg5#
- 1...Qh7
- 2.Sxg5#
- 1...Qa8
- 2.Sxg5#
- 1...Qb8
- 2.Sxg5#
- 1...Qc8
- 2.Sxg5#
- 1...Qd8
- 2.Sxg5#
- 1...Qe8
- 2.Sxg5#
- 1...Qf8
- 2.Sxg5#
- 1...Rxb4
- 2.Sc5#
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Bg6
- 2.Sxg5#
- 1...Seg6
- 2.Sxg5#
- 1...Sef7
- 2.Qxc4#
- 1...Shg6
- 2.Sxg5#
- 1...g4
- 2.Rf4#
- 1...Qe6
- Tries
- 1.Qxc4+?
- 1...Qxc4
- 2.Sxg5#
- 1...Sxc4+!
- 1...Qxc4
- 1.Qb5?
- threat
- 2.Qxe5#
- 1...Sxd7
- 2.Sf2#
- 1...Qd5
- 2.Qxd5#
- 1...Qe6
- 2.Sxg5#
- 1...Qb8
- 2.Sxg5#
- 2.Qd5#
- 1...Qe8
- 2.Sxg5#
- 2.Qd5#
- 1...Rd4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Sd3
- 2.Sd6#
- 1...Sf3
- 2.Sf2#
- 1...Sg4
- 2.Bf3#
- 1...Sc6
- 2.Sf2#
- 1...Seg6
- 2.Sf2#
- 2.Sxg5#
- 1...Sef7
- 2.Sf2#
- 2.Qxc4#
- 2.Qd5#
- 1...Shg6
- 2.Sxg5#
- 1...Shf7
- 2.Qd5#
- 1...Qa8+!
- threat
- 1.Qe6?
- threat
- 2.Sf2#
- 2.Qxe5#
- 1...Qxe6
- 2.Sxg5#
- 1...Bxd1
- 2.Qxe5#
- 1...Rd4
- 2.Sf2#
- 2.Sc5#
- 1...Qb8
- 2.Sf2#
- 2.Sxg5#
- 2.Qd5#
- 1...Qe8
- 2.Sf2#
- 2.Sxg5#
- 2.Qd5#
- 1...Rc5
- 2.Sf2#
- 2.Sxc5#
- 1...Be2
- 2.Qxe5#
- 1...Sg6
- 2.Sf2#
- 2.Sxg5#
- 1...Sf7
- 2.Sf2#
- 2.Qd5#
- 1...Qa8+!
- threat
- 1.Qxc4+?
- Keys
- 1.Qa5!
- threat
- 2.Qxe5#
- 1...Sxd7
- 2.Sf2#
- 1...Qd5
- 2.Qxd5#
- 1...Rd4
- 2.Sc5#
- 1...Qe6
- 2.Sxg5#
- 1...Qa8
- 2.Sxg5#
- 1...Qb8
- 2.Sxg5#
- 2.Qd5#
- 1...Qe8
- 2.Sxg5#
- 2.Qd5#
- 1...Rc5
- 2.Sxc5#
- 1...Sd3
- 2.Sd6#
- 1...Sf3
- 2.Sf2#
- 1...Sg4
- 2.Bf3#
- 1...Sc6
- 2.Sf2#
- 1...Seg6
- 2.Sf2#
- 2.Sxg5#
- 1...Sef7
- 2.Sf2#
- 2.Qd5#
- 1...Shg6
- 2.Sxg5#
- 1...Shf7
- 2.Qd5#
- threat
- 1.Qa5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 12
- Sets
- Q(g);N_GUARD::S(F),XP(e)
- Q(g);N_GUARD,P_PINQ(I)::S(F),XP(e)
- Q(g);N_GUARD,P_PINP(G)::S(F),XP(e)
- R(b);N_GUARD,XP(G)::S(K)
- R(b);N_GUARD::S(K)
- R(b);N_GUARD::S(K),XR(b)
- B(f);S_CUTQ(g)::S(F),XP(e)
- S(d);S_CUTQ(g)::S(F),XP(e)
- S(d);N_GUARD,S_CUTQ(g)::QAR2(I),XR(b)
- S(h);S_CUTQ(g)::S(F),XP(e)
- P(e);N_GUARD::R1(B)
- Tries
- Try
- Q(I);CHECK,XR(b)
- Vars
- Q(g);XQ(I)::S(F),XP(e)
- Refutation
- S(d);CHECK,XQ(I)
- Try
- Q(I);
- Threat
- QAR1(I),XS(d)
- Vars
- S(d);XR(L)::S(F)
- Q(g);N_GUARD::QAB1(I),XQ(g)
- Q(g);N_GUARD::S(F),XP(e)
- R(b);N_GUARD::S(K)
- R(b);N_GUARD::S(K),XR(b)
- S(d);SBLOCK::S(K)
- S(d);::S(F)
- S(d);N_GUARD,S_CUTB(f)::B(A)
- S(h);S_CUTQ(g)::S(F),XP(e)
- S(h);S_CUTQ(g)::QAB1(I)
- Refutation
- Q(g);CHECK
- Try
- Q(I);P_PINS(d)
- Threat
- DUALS(2)
- Vars
- Q(g);N_GUARD,N_SPINS(d),XQ(I)::S(F),XP(e)
- B(f);XB(A)::QAR1(I),XS(d)
- B(f);::QAR1(I),XS(d)
- Refutation
- Q(g);CHECK
- Try
- Actual
- Q(I);
- Threat
- QAR1(I),XS(d)
- Vars
- S(d);XR(L)::S(F)
- Q(g);N_GUARD::QAB1(I),XQ(g)
- R(b);N_GUARD::S(K)
- Q(g);N_GUARD::S(F),XP(e)
- Q(g);N_GUARD,P_PINQ(I)::S(F),XP(e)
- R(b);N_GUARD::S(K),XR(b)
- S(d);SBLOCK::S(K)
- S(d);::S(F)
- S(d);N_GUARD,S_CUTB(f)::B(A)
- S(h);S_CUTQ(g)::S(F),XP(e)
- S(h);S_CUTQ(g)::QAB1(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).