MESON Chess Problem Database
Problem Display
PID: 21818 (2R5/8/1K6/2Bp4/2kqn2R/4P3/P1PP4/8 w - - 0 1)
Bottacchi, Antonio
1st HM.=, Good Companions (March Meredith Ty.), 1921
#2
8 + 4
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Qc3
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Qe5
- 2.Bd6#
- 1...Qf6+
- 2.Bd6#
- 1...Qg7
- 2.Be7#
- 1...Qh8
- 2.Bf8#
- 1...Qxd2
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Qd3
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Sf2
- 2.Rxd4#
- 1...Sc3
- 2.Rxd4#
- 2.d3#
- 1...Sg3
- 2.Rxd4#
- 1...Sxc5
- 2.Rxd4#
- 1...Sg5
- 2.Rxd4#
- 1...Sd6
- 2.Rxd4#
- 1...Sf6
- 2.Rxd4#
- 1...Qa1
- Tries
- 1.Ka5?
- 1...Qc3+
- 2.Bb4#
- 1...Qxd2+
- 2.Bb4#
- 1...Qxe3
- 2.Bxe3#
- 1...Sxd2
- 2.Ba3#
- 2.Bb4#
- 2.Bxd4#
- 2.Bb6#
- 2.Bd6#
- 2.Ba7#
- 2.Be7#
- 2.Bf8#
- 1...Sxc5
- 2.Rxd4#
- 1...Qa1
- 2.Ba3#
- 2.Bb4#
- 2.Bb6#
- 2.Bd6#
- 2.Ba7#
- 2.Be7#
- 2.Bf8#
- 1...Qb2
- 2.Ba3#
- 2.Bb4#
- 2.Bb6#
- 2.Bd6#
- 2.Ba7#
- 2.Be7#
- 2.Bf8#
- 1...Qe5
- 2.Bd6#
- 1...Qf6
- 2.Bd6#
- 1...Qg7
- 2.Be7#
- 1...Qh8
- 2.Bf8#
- 1...Qd3
- 2.Ba3#
- 2.Bb4#
- 2.Bb6#
- 2.Bd6#
- 2.Ba7#
- 2.Be7#
- 2.Bf8#
- 1...Sf2
- 2.Ba3#
- 2.Bb4#
- 2.Bxd4#
- 2.Bb6#
- 2.Bd6#
- 2.Ba7#
- 2.Be7#
- 2.Bf8#
- 2.Rxd4#
- 1...Sc3
- 2.Ba3#
- 2.Bb4#
- 2.Bxd4#
- 2.Bb6#
- 2.Bd6#
- 2.Ba7#
- 2.Be7#
- 2.Bf8#
- 2.Rxd4#
- 2.d3#
- 1...Sg3
- 2.Ba3#
- 2.Bb4#
- 2.Bxd4#
- 2.Bb6#
- 2.Bd6#
- 2.Ba7#
- 2.Be7#
- 2.Bf8#
- 2.Rxd4#
- 1...Sg5
- 2.Ba3#
- 2.Bb4#
- 2.Bxd4#
- 2.Bb6#
- 2.Bd6#
- 2.Ba7#
- 2.Be7#
- 2.Bf8#
- 2.Rxd4#
- 1...Sd6
- 2.Bxd6#
- 2.Rxd4#
- 1...Sf6
- 2.Ba3#
- 2.Bb4#
- 2.Bxd4#
- 2.Bb6#
- 2.Bd6#
- 2.Ba7#
- 2.Be7#
- 2.Bf8#
- 2.Rxd4#
- 1...Qxc5+!
- 1...Qc3+
- 1.Rxe4?
- threat
- 2.Rxd4#
- 1...Qxe4
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...dxe4!
- threat
- 1.d3+?
- 1...Qxd3
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Kc3!
- 1...Qxd3
- 1.exd4?
- 1...Sxd2
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Sf2
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Sc3
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.d3#
- 1...Sg3
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Sg5
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Sd6
- 2.Bxd6#
- 1...Sf6
- 2.Ba3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Sxc5!
- 1...Sxd2
- 1.Ka5?
- Keys
- 1.a3!
- 1...Qb2+
- 2.Bb4#
- 1...Qxc5+
- 2.Rxc5#
- 1...Qf6+
- 2.Bd6#
- 1...Qxe3
- 2.Bxe3#
- 1...Qxd2
- 2.Bb4#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Sxd2
- 2.Bxd4#
- 1...Sxc5
- 2.Rxd4#
- 2.Rxc5#
- 1...Qa1
- 2.Bb4#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Qc3
- 2.Bb4#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Qe5
- 2.Bd6#
- 1...Qg7
- 2.Be7#
- 1...Qh8
- 2.Bf8#
- 1...Qd3
- 2.Bb4#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Sf2
- 2.Bxd4#
- 2.Rxd4#
- 1...Sc3
- 2.Bxd4#
- 2.Rxd4#
- 2.d3#
- 1...Sg3
- 2.Bxd4#
- 2.Rxd4#
- 1...Sg5
- 2.Bxd4#
- 2.Rxd4#
- 1...Sd6
- 2.Rxd4#
- 1...Sf6
- 2.Bxd4#
- 2.Rxd4#
- 1...Qb2+
- 1.a3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- Q(b);N_PINB(F),P_SPINS(c)::R(H)+B(F)
- Q(b);CHECK,N_PINB(F),P_SPINS(c)::R(H)+B(F)
- S(c);OGATE,P_SPINQ(b)::R1(E),XQ(b)
- S(c);OGATE,P_SPINQ(b),P_SPINS(c),XB(F)::R1(E),XQ(b)
- Tries
- Try
- K(G);N_SPINB(F),S_FLIGHT
- Vars
- Q(b);CHECK,N_GUARD,P_SPINS(c)::R(H)+B(F)
- Q(b);CHECK,N_GUARD,P_SPINS(c),XP(C)::R(H)+B(F)
- Q(b);OGATE,P_SPINS(c),XP(D)::R(H)+B(F),XQ(b)
- S(c);OGATE,P_SPINQ(b),P_SPINS(c),XB(F)::R1(E),XQ(b)
- Q(b);N_GUARD,P_SPINS(c)::R(H)+B(F)
- Refutation
- Q(b);CHECK,P_SPINQ(b),P_SPINS(c),XB(F)
- Try
- R(E);P_PINQ(b),XS(c)
- Threat
- R1(E),XQ(b)
- Refutation
- P(d);N_SPINQ(b),XR(E)
- Try
- P(C);CHECK
- Refutation
- K(a);P-FLIGHT
- Try
- P(D);N_SPINB(F),XQ(b)
- Vars
- S(c);N_GUARD::R(H)+B(F),XS(c)
- Refutation
- S(c);P_SPINS(c),XB(F)
- Try
- Actual
- P(A);
- Vars
- Q(b);CHECK,N_PINB(F),P_SPINS(c)::R(H)+B(F)
- Q(b);CHECK,OGATE,P_SPINQ(b),P_SPINS(c),XB(F)::R1(H),XQ(b)
- Q(b);P_SPINS(c),XP(D)::R(H)+B(F),XQ(b)
- S(c);N_GUARD,P_SPINQ(b),XP(C)::R(H)+B(F),XQ(b)
- Q(b);N_PINB(F),P_SPINS(c)::R(H)+B(F)
- S(c);OGATE,P_SPINQ(b)::R1(E),XQ(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).