MESON Chess Problem Database
Problem Display
PID: 214903 (3k2Nr/R2P3p/1p1P1b1P/1n4RK/1Q4BB/8/8/q7 w - - 0 1)
Barrier, ?
St. Louis Globe Democrat, 1878
#2
10 + 7
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.Ra8#
- 1...Qd4
- 2.Ra8#
- 1...Qe5
- 2.Ra8#
- 1...Qb1
- 2.Ra8#
- 1...Qd1
- 2.Ra8#
- 1...Qe1
- 2.Ra8#
- 1...Qf1
- 2.Ra8#
- 1...Qg1
- 2.Ra8#
- 1...Rxg8
- 2.Rxg8#
- 1...Bb2
- 2.Re5#
- 1...Bc3
- 2.Re5#
- 1...Bd4
- 2.Re5#
- 1...Be5
- 2.Rxe5#
- 1...Be7
- 2.dxe7#
- 1...Sa3
- 2.Ra8#
- 2.Qxb6#
- 1...Sc3
- 2.Qxb6#
- 1...Sd4
- 2.Qxb6#
- 1...Sxd6
- 2.Qxb6#
- 1...Sxa7
- 2.Qxb6#
- 1...Sc7
- 2.dxc7#
- 1...Qb2
- Tries
- 1.Re5?
- threat
- 2.Bxf6#
- 2.Re8#
- 1...Rxg8
- 2.Bxf6#
- 1...Bxh4
- 2.Re8#
- 1...Sxd6
- 2.Bxf6#
- 2.Qxb6#
- 1...Qe1
- 2.Bxf6#
- 2.Ra8#
- 1...Qf1
- 2.Re8#
- 2.Ra8#
- 1...Qh1
- 2.Re8#
- 1...Bg5
- 2.Bxg5#
- 2.Re8#
- 1...Be7
- 2.Bxe7#
- 2.dxe7#
- 1...Sc7
- 2.Bxf6#
- 2.dxc7#
- 1...Qxe5+!
- threat
- 1.Rxa1?
- threat
- 2.Ra8#
- 1...Bxa1
- 2.Re5#
- 1...Sxd6
- 2.Qxb6#
- 1...Sa3
- 2.Qxb6#
- 1...Sa7
- 2.Qxb6#
- 1...Sc7!
- threat
- 1.Qe1?
- threat
- 2.Qe8#
- 1...Qxe1
- 2.Ra8#
- 1...Rxg8
- 2.Rxg8#
- 1...Qe5
- 2.Ra8#
- 1...Be5
- 2.Rxe5#
- 1...Be7
- 2.Qxe7#
- 2.dxe7#
- 1...Sc7
- 2.dxc7#
- 1...Sxd6!
- threat
- 1.Qc4?
- threat
- 2.Qc8#
- 1...Sxd6
- 2.Qc7#
- 1...Sxa7
- 2.Qc7#
- 1...Qc3
- 2.Ra8#
- 1...Qc1
- 2.Ra8#
- 1...Sc7
- 2.Qxc7#
- 2.dxc7#
- 1...Qa6!
- threat
- 1.Qe4?
- threat
- 2.Qa8#
- 2.Qe8#
- 1...Qxa7
- 2.Qe8#
- 1...Rxg8
- 2.Rxg8#
- 2.Qa8#
- 1...Sxa7
- 2.Qe8#
- 1...Qc3
- 2.Qe8#
- 1...Qe5
- 2.Ra8#
- 2.Qa8#
- 1...Qc1
- 2.Qe8#
- 1...Qe1
- 2.Ra8#
- 2.Qa8#
- 1...Qh1
- 2.Ra8#
- 2.Qe8#
- 1...Qa6
- 2.Qe8#
- 1...Be5
- 2.Rxe5#
- 2.Qa8#
- 1...Be7
- 2.Qa8#
- 2.Qxe7#
- 2.dxe7#
- 1...Sc7
- 2.dxc7#
- 1...Sxd6!
- threat
- 1.Re5?
- Keys
- 1.Qb2!
- 1...Qxb2
- 2.Ra8#
- 1...Qxa7
- 2.Qxf6#
- 1...Rxg8
- 2.Rxg8#
- 1...Bxb2
- 2.Re5#
- 1...Bxg5
- 2.Bxg5#
- 1...Sxd6
- 2.Qxb6#
- 1...Sxa7
- 2.Qxb6#
- 1...Qb1
- 2.Ra8#
- 2.Qxf6#
- 1...Qc1
- 2.Qxf6#
- 1...Qd1
- 2.Ra8#
- 2.Qxf6#
- 1...Qe1
- 2.Ra8#
- 1...Qf1
- 2.Ra8#
- 1...Qg1
- 2.Ra8#
- 2.Qxf6#
- 1...Qh1
- 2.Qxf6#
- 1...Qa2
- 2.Qxf6#
- 1...Qa3
- 2.Qxf6#
- 1...Qa4
- 2.Qxf6#
- 1...Qa5
- 2.Qxf6#
- 1...Qa6
- 2.Qxf6#
- 1...Bc3
- 2.Re5#
- 1...Bd4
- 2.Re5#
- 1...Be5
- 2.Rxe5#
- 1...Be7
- 2.dxe7#
- 1...Bg7
- 2.Rxg7#
- 1...Sa3
- 2.Ra8#
- 2.Qxb6#
- 1...Sc3
- 2.Qxb6#
- 1...Sd4
- 2.Qxb6#
- 1...Sc7
- 2.dxc7#
- 1...Qxb2
- 1.Qb2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 10
- REMOVED MATES = 5
- Sets
- Q(a);N_GUARD::R(H)
- Q(a);N_GUARD,P_PINR(D)::R(H)
- Q(a);N_GUARD,P_PINB(B)::R(H)
- R(g);OGATE,XS(J)::R(D),XR(g)
- B(d);OGATEB::B(C)+R(D)
- B(d);OGATEB::B(C)+R(D),XB(d)
- B(d);OGATE::P(F),XB(d)
- S(b);OGATE::QAB(A),XP(c)
- S(b);OGATE,XP(F)::QAB(A),XP(c)
- S(b);OGATE,XR(H)::QAB(A),XP(c)
- S(b);OGATE::P(F),XS(b)
- Tries
- Try
- R(D);P_PINB(d)
- Threat
- DUALS(2)
- Vars
- R(g);XS(J)::B(C),XB(d)
- B(d);N_SPINB(d),XB(C)::R1(D)
- Q(a);P_PINB(C)::R1(D)
- Refutation
- Q(a);CHECK,XR(D)
- Try
- R(H);XQ(a)
- Threat
- R(H)
- Vars
- B(d);OGATEB,XR(H)::B(C)+R(D)
- S(b);OGATE,XP(F)::QAB(A),XP(c)
- S(b);OGATE::QAB(A),XP(c)
- Refutation
- S(b);
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- Q(a);N_GUARD,XQ(A)::R(H)
- R(g);OGATE,XS(J)::R(D),XR(g)
- Q(a);N_GUARD,P_PINR(D)::R(H)
- B(d);OGATEB::B(C)+R(D),XB(d)
- S(b);OGATE::P(F),XS(b)
- Refutation
- S(b);XP(F)
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- S(b);N_GUARD,XP(F)::QAB1(A)
- S(b);N_GUARD,XR(H)::QAB1(A)
- Q(a);N_GUARD::R(H)
- Refutation
- Q(a);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(a);XR(H)::QAR1(A)
- S(b);XR(H)::QAR1(A)
- Q(a);::QAR1(A)
- S(b);OGATE::P(F),XS(b)
- Refutation
- S(b);XP(F)
- Try
- Actual
- Q(A);
- Vars
- Q(a);N_GUARD,XQ(A)::R(H)
- Q(a);N_GUARD,XR(H)::QAB(A),XB(d)
- R(g);OGATE,XS(J)::R(D),XR(g)
- B(d);OGATEB,XQ(A)::B(C)+R(D)
- B(d);OGATE,P_SPINB(d),XR(D)::B(C),XB(d)
- S(b);OGATE,XP(F)::QAB(A),XP(c)
- S(b);OGATE,XR(H)::QAB(A),XP(c)
- Q(a);N_GUARD::QAB(A),XB(d)
- Q(a);N_GUARD::R(H)
- Q(a);N_GUARD,P_PINB(C)::QAB(A),XB(d)
- B(d);OGATEB::B(C)+R(D)
- B(d);OGATEB::B(C)+R(D),XB(d)
- B(d);OGATE::P(F),XB(d)
- S(b);OGATE::QAB(A),XP(c)
- S(b);OGATE::P(F),XS(b)
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).