MESON Chess Problem Database
Problem Display
PID: 106851 (4b1BK/1r4p1/8/bp1nNQ1p/3k4/5pq1/2R1PPn1/4B2r w - - 0 1)
Andrade, Barry Jack da Costa
London Evening News, 1950
#2
8 + 12
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qh2
- 2.Sxf3#
- 1...Qh4
- 2.Sxf3#
- 1...Qxe5
- 2.Qd3#
- 1...Qg5
- 2.Sxf3#
- 1...Qg6
- 2.Sxf3#
- 1...Rd7
- 2.Sc6#
- 1...Bc6
- 2.Sxc6#
- 1...Bg6
- 2.Sc6#
- 1...Bf7
- 2.Sc6#
- 1...b4
- 2.Rc4#
- 1...Qh2
- Tries
- 1.Sg4?
- threat
- 2.Qd3#
- 2.Qxd5#
- 1...Qxg4
- 2.Qxd5#
- 1...Sxe1
- 2.Qxd5#
- 1...fxe2
- 2.Qxd5#
- 1...Bc3
- 2.Qxd5#
- 1...Qd6
- 2.Qd3#
- 1...Qe5
- 2.Qd3#
- 2.Qxe5#
- 1...Rd7
- 2.Qd3#
- 1...Rf7
- 2.Qd3#
- 1...Bc6
- 2.Qd3#
- 1...Bg6
- 2.Qxd5#
- 1...Bf7
- 2.Qd3#
- 1...Sge3
- 2.Qd3#
- 1...Sgf4
- 2.Qe5#
- 1...Sc3
- 2.Rd2#
- 1...Sde3
- 2.Qd3#
- 1...Sb4
- 2.Bc3#
- 1...Sdf4
- 2.Qe5#
- 1...Sb6
- 2.Qd3#
- 1...Sf6
- 2.Qd3#
- 1...Sc7
- 2.Qd3#
- 1...Se7
- 2.Qd3#
- 1...hxg4+!
- threat
- 1.Sd7?
- threat
- 2.Qd3#
- 2.Qxd5#
- 1...Qxf2
- 2.Qd3#
- 2.Qe5#
- 1...Bxd7
- 2.Qxd5#
- 1...Sxe1
- 2.Qxd5#
- 1...fxe2
- 2.Qxd5#
- 1...Qd6
- 2.Qd3#
- 1...Qe5
- 2.Qd3#
- 2.Qxe5#
- 1...Qg5
- 2.Qd3#
- 1...Qg6
- 2.Qxd5#
- 2.Qe5#
- 1...Bg6
- 2.Qxd5#
- 1...Bf7
- 2.Qd3#
- 1...Sge3
- 2.Qd3#
- 1...Sgf4
- 2.Qe5#
- 1...Sc3
- 2.Rd2#
- 2.Qd3#
- 1...Sde3
- 2.Qd3#
- 1...Sb4
- 2.Bc3#
- 1...Sdf4
- 2.Qe5#
- 1...Sb6
- 2.Qd3#
- 1...Sf6
- 2.Qd3#
- 1...Sc7
- 2.Qd3#
- 1...Se7
- 2.Qd3#
- 1...Rxd7!
- threat
- 1.Sg4?
- Keys
- 1.Sg6!
- threat
- 2.Qd3#
- 2.Qxd5#
- 1...Qxf2
- 2.Qd3#
- 2.Qe5#
- 1...Qxg6
- 2.Qxd5#
- 1...Bxg6
- 2.Qxd5#
- 1...Sxe1
- 2.Qxd5#
- 1...fxe2
- 2.Qxd5#
- 1...Bc3
- 2.Qxd5#
- 1...Qd6
- 2.Qd3#
- 1...Qe5
- 2.Qd3#
- 2.Qxe5#
- 1...Qg5
- 2.Qd3#
- 1...Rd7
- 2.Qd3#
- 1...Rf7
- 2.Qd3#
- 1...Bc6
- 2.Qd3#
- 1...Bf7
- 2.Qd3#
- 1...Sge3
- 2.Qd3#
- 1...Sgf4
- 2.Qe5#
- 1...Sc3
- 2.Rd2#
- 1...Sde3
- 2.Qd3#
- 1...Sb4
- 2.Bc3#
- 1...Sdf4
- 2.Qe5#
- 1...Sb6
- 2.Qd3#
- 1...Sf6
- 2.Qd3#
- 1...Sc7
- 2.Qd3#
- 1...Se7
- 2.Qd3#
- threat
- 1.Sg6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 6
- ADDED MATES = 15
- REMOVED MATES = 4
- Sets
- Q(d);N_GUARD::S(E),XP(c)
- Q(d);SBLOCK,XS(E)::QAR1(F)
- R(j);S_CUTB(l)::S(E)
- B(l);N_GUARD::S(E),XB(l)
- B(l);N_GUARD::S(E)
- P(g);N_GUARD::R1(B)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(d);XS(E)::QAR1(F),XS(h)
- S(b);XB(A)::QAR1(F),XS(h)
- P(c);XP(C)::QAR1(F),XS(h)
- B(f);::QAR1(F),XS(h)
- Q(d);::QAR1(F)
- R(j);::QAR1(F)
- B(l);::QAR1(F)
- B(l);::QAR1(F),XS(h)
- S(b);::QAR1(F)
- S(b);S_CUTQ(d)::QAB1(F)
- S(h);SBLOCK,S_CUTB(f)::R(B)
- S(h);::QAR1(F)
- S(h);N_GUARD,S_CUTB(f)::B(A)
- S(h);S_CUTQ(d)::QAB1(F)
- Refutation
- P(i);CHECK,XS(E)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- B(l);XS(E)::QAR1(F),XS(h)
- S(b);XB(A)::QAR1(F),XS(h)
- P(c);XP(C)::QAR1(F),XS(h)
- Q(d);::QAR1(F)
- B(l);::QAR1(F),XS(h)
- B(l);::QAR1(F)
- S(b);::QAR1(F)
- S(b);S_CUTQ(d)::QAB1(F)
- S(h);::QAR1(F)
- S(h);N_GUARD,S_CUTB(f)::B(A)
- S(h);S_CUTQ(d)::QAB1(F)
- Refutation
- R(j);XS(E)
- Try
- Actual
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(d);XS(E)::QAR1(F),XS(h)
- B(l);XS(E)::QAR1(F),XS(h)
- S(b);XB(A)::QAR1(F),XS(h)
- P(c);XP(C)::QAR1(F),XS(h)
- B(f);::QAR1(F),XS(h)
- Q(d);::QAR1(F)
- R(j);::QAR1(F)
- B(l);::QAR1(F)
- S(b);::QAR1(F)
- S(b);S_CUTQ(d)::QAB1(F)
- S(h);SBLOCK,S_CUTB(f)::R(B)
- S(h);::QAR1(F)
- S(h);N_GUARD,S_CUTB(f)::B(A)
- S(h);S_CUTQ(d)::QAB1(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).