MESON Chess Problem Database
Problem Display
PID: 224281 (3Q4/1qpB1p2/1pnnNP2/1P1k2p1/3b4/1P1P2B1/2RKR3/3N4 w - - 0 1)
Council, John W
Brownson's Chess Journal, 1887
#2
12 + 9
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qa6
- 2.Sxc7#
- 2.Bxc6#
- 1...Qa8
- 2.Sxc7#
- 1...Qc8
- 2.Bxc6#
- 1...Qa7
- 2.Bxc6#
- 1...Qb8
- 2.Bxc6#
- 1...Ba1
- 2.Se3#
- 1...Bg1
- 2.Sc3#
- 1...Bb2
- 2.Se3#
- 1...Bf2
- 2.Sc3#
- 1...Bc3+
- 2.Sxc3#
- 1...Be3+
- 2.Sxe3#
- 1...Bc5
- 2.Sc3#
- 1...Be5
- 2.Se3#
- 1...Bxf6
- 2.Se3#
- 1...Sc4+
- 2.bxc4#
- 2.dxc4#
- 1...Se4+
- 2.dxe4#
- 1...Sxb5
- 2.Bxc6#
- 1...Sf5
- 2.Bxc6#
- 1...Sc8
- 2.Bxc6#
- 1...Se8
- 2.Bxc6#
- 1...g4
- 2.Sf4#
- 1...fxe6
- 2.Bxe6#
- 1...Qa6
- Tries
- 1.Rc5+?
- 1...Bxc5
- 2.Sc3#
- 1...bxc5!
- 1...Bxc5
- 1.Re4?
- 1...Bc3+
- 2.Sxc3#
- 1...Be3+
- 2.Sxe3#
- 1...Sc4+
- 2.bxc4#
- 1...Bxf6
- 2.Se3#
- 1...Sxd8
- 2.Rxd4#
- 1...Sxb5
- 2.Bxc6#
- 1...fxe6
- 2.Bxe6#
- 1...Sb4
- 2.Rxd4#
- 1...Qa6
- 2.Sxc7#
- 2.Bxc6#
- 1...Qa8
- 2.Sxc7#
- 1...Qc8
- 2.Bxc6#
- 1...Qa7
- 2.Bxc6#
- 1...Qb8
- 2.Bxc6#
- 1...Ba1
- 2.Se3#
- 1...Bg1
- 2.Sc3#
- 1...Bb2
- 2.Se3#
- 1...Bf2
- 2.Sc3#
- 1...Bc5
- 2.Sc3#
- 1...Be5
- 2.Se3#
- 1...Sa5
- 2.Rxd4#
- 1...Se5
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...Se7
- 2.Rxd4#
- 1...Sb8
- 2.Rxd4#
- 1...Sf5
- 2.Bxc6#
- 1...Sc8
- 2.Bxc6#
- 1...Se8
- 2.Bxc6#
- 1...g4
- 2.Sf4#
- 1...Sxe4+!
- 1...Bc3+
- 1.Re5+?
- 1...Bxe5
- 2.Se3#
- 1...Sxe5!
- 1...Bxe5
- 1.Rc5+?
- Keys
- 1.Rc4!
- 1...Bc3+
- 2.Sxc3#
- 1...Be3+
- 2.Sxe3#
- 1...Sxc4+
- 2.bxc4#
- 2.dxc4#
- 1...Se4+
- 2.dxe4#
- 1...Bxf6
- 2.Se3#
- 1...Sxd8
- 2.Rxd4#
- 1...Sxb5
- 2.Bxc6#
- 1...fxe6
- 2.Bxe6#
- 1...Sb4
- 2.Rxd4#
- 1...Qa6
- 2.Sxc7#
- 2.Bxc6#
- 1...Qa8
- 2.Sxc7#
- 1...Qc8
- 2.Bxc6#
- 1...Qa7
- 2.Bxc6#
- 1...Qb8
- 2.Bxc6#
- 1...Ba1
- 2.Se3#
- 1...Bg1
- 2.Sc3#
- 1...Bb2
- 2.Se3#
- 1...Bf2
- 2.Sc3#
- 1...Bc5
- 2.Sc3#
- 1...Be5
- 2.Se3#
- 1...Sa5
- 2.Rxd4#
- 1...Se5
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...Se7
- 2.Rxd4#
- 1...Sb8
- 2.Rxd4#
- 1...Sf5
- 2.Bxc6#
- 1...Sc8
- 2.Bxc6#
- 1...Se8
- 2.Bxc6#
- 1...g4
- 2.Sf4#
- 1...Bc3+
- 1.Rc4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- Q(g);N_GUARD::S(I),XP(h)
- Q(g);N_GUARD::B(K),XS(e)
- B(a);N_GUARD::S(A)
- B(a);CHECK,N_GUARD::S(A),XB(a)
- B(a);N_GUARD,XP(J)::S(A)
- S(f);CHECK,OGATE::P(F),XS(f)
- S(f);XP(H)::QAR(L)+B(K),DCHECK,XS(e)
- S(f);::QAR(L)+B(K),DCHECK,XS(e)
- P(c);N_GUARD::S(I)
- P(i);OGATE,XS(I)::B(K),XP(i)
- Tries
- Try
- R(B);CHECK
- Vars
- B(a);XR(B)::S(A)
- Refutation
- P(d);XR(B)
- Try
- R(D);
- Vars
- B(a);CHECK,N_GUARD::S(A),XB(a)
- S(f);CHECK,OGATE::P(E),XS(f)
- B(a);N_GUARD,XP(J)::S(A)
- S(e);N_GUARD,XQ(L)::R1(D),XB(a)
- S(f);XP(H)::QAR(L)+B(K),DCHECK,XS(e)
- P(i);OGATE,XS(I)::B(K),XP(i)
- S(e);N_GUARD::R1(D),XB(a)
- Q(g);N_GUARD::S(I),XP(h)
- Q(g);N_GUARD::B(K),XS(e)
- B(a);N_GUARD::S(A)
- S(f);::QAR(L)+B(K),DCHECK,XS(e)
- P(c);N_GUARD::S(I)
- Refutation
- S(f);CHECK,XR(D)
- Try
- R(D);CHECK
- Vars
- B(a);XR(D)::S(A)
- Refutation
- S(e);XR(D)
- Try
- Actual
- R(B);
- Vars
- B(a);CHECK,N_GUARD::S(A),XB(a)
- S(f);CHECK,OGATE::P(F),XS(f)
- B(a);N_GUARD,XP(J)::S(A)
- S(e);N_GUARD,XQ(L)::R1(B),XB(a)
- S(f);XP(H)::QAR(L)+B(K),DCHECK,XS(e)
- P(i);OGATE,XS(I)::B(K),XP(i)
- S(e);N_GUARD::R1(B),XB(a)
- Q(g);N_GUARD::S(I),XP(h)
- Q(g);N_GUARD::B(K),XS(e)
- B(a);N_GUARD::S(A)
- S(f);::QAR(L)+B(K),DCHECK,XS(e)
- P(c);N_GUARD::S(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).