MESON Chess Problem Database
Problem Display
PID: 52502 (B4N2/2B5/5p2/R2nqkP1/3p1p1P/1N1p1P2/1K1P1Q2/8 w - - 0 1)
Bottacchi, Antonio
Good Companions (November), 1919
#2
11 + 7
| 3132 | The Good Companion Two-Mover | 1922 |
| 5308 | La genialita compositiva di Giorgio Guidelli | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Sxd4#
- 1...Qe2
- 2.Sxd4#
- 1...Qe6
- 2.Sxd4#
- 1...Qe7
- 2.Sxd4#
- 1...Qe8
- 2.Sxd4#
- 1...Sc3
- 2.Sxd4#
- 1...Se3
- 2.Sxd4#
- 2.Be4#
- 1...Sb4
- 2.Sxd4#
- 2.Be4#
- 1...Sb6
- 2.Sxd4#
- 2.Be4#
- 1...Sxc7
- 2.Sxd4#
- 2.Be4#
- 1...Se7
- 2.Sxd4#
- 2.Be4#
- 1...Qe1
- Tries
- 1.Bxd5?
- threat
- 2.Be4#
- 2.Be6#
- 1...Qxd5
- 2.Sxd4#
- 2.Rxd5#
- 1...Qe4
- 2.Bxe4#
- 2.Be6#
- 1...Qe6
- 2.Sxd4#
- 2.Be4#
- 2.Bxe6#
- 1...fxg5!
- threat
- 1.Qe1?
- 1...Qxc7
- 2.Sxd4#
- 2.Qe4#
- 2.Qe6#
- 1...Qxe1
- 2.Sxd4#
- 1...Sxc7
- 2.Sxd4#
- 2.Be4#
- 2.Qe4#
- 1...fxg5
- 2.Qxe5#
- 1...Qd6
- 2.Sxd4#
- 2.Qe4#
- 1...Qe2
- 2.Sxd4#
- 1...Qe4
- 2.Qxe4#
- 1...Qe6
- 2.Sxd4#
- 2.Qxe6#
- 1...Qe7
- 2.Sxd4#
- 1...Qe8
- 2.Sxd4#
- 1...Sc3
- 2.Sxd4#
- 1...Se3
- 2.Sxd4#
- 2.Be4#
- 1...Sb4
- 2.Sxd4#
- 2.Be4#
- 2.Qe4#
- 1...Sb6
- 2.Sxd4#
- 2.Be4#
- 2.Qe4#
- 1...Se7
- 2.Sxd4#
- 2.Be4#
- 2.Qe4#
- 1...Qe3!
- 1...Qxc7
- 1.Bxd5?
- Keys
- 1.Qxd4!
- 1...Qxd4+
- 2.Sxd4#
- 1...Qxc7
- 2.Qxf6#
- 2.Qe4#
- 1...Sxc7
- 2.Be4#
- 1...fxg5
- 2.Qxe5#
- 1...Qd6
- 2.Qe4#
- 1...Qe1
- 2.Qxf6#
- 2.Qxf4#
- 1...Qe2
- 2.Qxf6#
- 2.Qxf4#
- 1...Qe3
- 2.Qxf6#
- 1...Qe4
- 2.Qxf6#
- 2.Qxe4#
- 1...Qe6
- 2.Qxf4#
- 1...Qe7
- 2.Qxf4#
- 1...Qe8
- 2.Qxf6#
- 2.Qxf4#
- 1...Sc3
- 2.Qd7#
- 1...Se3
- 2.Be4#
- 1...Sb4
- 2.Be4#
- 1...Sb6
- 2.Be4#
- 1...Se7
- 2.Be4#
- 1...Qxd4+
- 1.Qxd4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 3
- ADDED MATES = 9
- REMOVED MATES = 3
- Sets
- Q(e);N_GUARD,P_SPINS(d)::S(D),XP(b)
- Q(e);N_GUARD,P_PINP(B),P_SPINS(d)::S(D),XP(b)
- S(d);P_SPINQ(e)::S(D),XP(b)
- Tries
- Try
- B(J);XS(d)
- Threat
- DUALS(2)
- Refutation
- P(g);XP(H)
- Try
- Q(C);
- Vars
- Q(e);N_GUARD,P_SPINS(d),XQ(C)::S(D),XP(b)
- P(g);N_GUARD,XP(H)::QAR1(C),XQ(e)
- Q(e);N_GUARD,P_PINP(B),P_SPINS(d)::S(D),XP(b)
- Q(e);N_GUARD,P_SPINS(d)::QAB1(C),XQ(e)
- Q(e);N_GUARD,P_SPINS(d)::S(D),XP(b)
- S(d);P_SPINQ(e)::S(D),XP(b)
- Refutation
- Q(e);P_SPINS(d)
- Try
- Actual
- Q(C);P_SPINQ(C),XP(b)
- Vars
- Q(e);CHECK,P_SPINS(d),XQ(C)::S(D),XQ(e)
- S(d);OGATE,P_SPINQ(e),XB(I)::B(J)
- P(g);N_GUARD,XP(H)::QAR1(C),XQ(e)
- Q(e);N_PINQ(C),P_SPINS(d)::QAB1(C)
- Q(e);N_PINQ(C),P_SPINS(d)::QAR1(C),XP(g)
- Q(e);N_PINQ(C),P_SPINS(d)::QAR1(C),XP(c)
- S(d);N_PINQ(C),P_SPINQ(e)::QAB(C)
- S(d);OGATE,P_SPINQ(e)::B(J)
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).