MESON Chess Problem Database
Problem Display
PID: 65122 (8/1n1b3p/Rq1bk2P/3NB1PQ/7K/1B2RpN1/7n/8 w - - 0 1)
Rothstein, Louis
4th Prize, Good Companions (October), 1921
#2
10 + 8
| 3132 | The Good Companion Two-Mover | 1922 |
| 3391 | Het Half Pin Thema | 1924 |
SOLUTION
- SOUND
- Sets
- 1...Qd4+
- 2.Bxd4#
- 1...Qa5
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bf4#
- 2.Bxd6#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...Qc5
- 2.Bd4#
- 1...Qa7
- 2.Bd4#
- 1...Qc7
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bf4#
- 2.Bxd6#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...Qd8
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bf4#
- 2.Bxd6#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...Qb4+
- 2.Bd4#
- 1...Qb5
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bf4#
- 2.Bxd6#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...Ba3
- 2.Bf4#
- 2.Bc7#
- 2.Bb8#
- 1...Bb4
- 2.Bf4#
- 2.Bc7#
- 2.Bb8#
- 1...Bc7
- 2.Bxc7#
- 1...Be7
- 2.Sc3#
- 2.Sb4#
- 2.Sf4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sc7#
- 2.Bf4#
- 2.Bc7#
- 2.Bb8#
- 1...Bb8
- 2.Bc7#
- 2.Bxb8#
- 1...Bf8
- 2.Bf4#
- 2.Bc7#
- 2.Bb8#
- 1...Qd4+
- Tries
- 1.Sc3+?
- 1...Qxb3
- 2.Bd4#
- 2.Bf4#
- 2.Bxd6#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...Ke7!
- 1...Qxb3
- 1.Sf6+?
- 1...Qxb3
- 2.Bc3#
- 1...Ke7!
- 1...Qxb3
- 1.Se7+?
- 1...Qxb3
- 2.Bc3#
- 1...Kxe7!
- 1...Qxb3
- 1.Bxd6+?
- 1...Qxe3
- 2.Sc3#
- 2.Sxe3#
- 2.Sf4#
- 2.Sc7#
- 1...Kxd6!
- 1...Qxe3
- 1.Bf6+?
- 1...Qxe3
- 2.Sc3#
- 2.Sxe3#
- 2.Sf4#
- 2.Sc7#
- 1...Be5!
- 1...Qxe3
- 1.Qxf3?
- threat
- 2.Qf5#
- 2.Qf6#
- 1...Qd4+
- 2.Bxd4#
- 1...Qb4+
- 2.Bd4#
- 1...Qxb3
- 2.Bc3#
- 1...Bxe5
- 2.Qf6#
- 1...Ba4
- 2.Qf5#
- 1...Bb5
- 2.Qf5#
- 1...Bc6
- 2.Qf5#
- 1...Bc8
- 2.Qf5#
- 1...Be8
- 2.Qf5#
- 1...Qd8
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bxd6#
- 2.Bg7#
- 2.Bh8#
- 2.Qf5#
- 1...Be7
- 2.Sc3#
- 2.Sb4#
- 2.Sf4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sc7#
- 2.Bc7#
- 2.Bb8#
- 2.Qf5#
- 1...Sg4
- 2.Qf5#
- 1...Sxf3+!
- threat
- 1.Qe8+?
- 1...Be7
- 2.Sc3#
- 2.Sb4#
- 2.Sf4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sc7#
- 2.Sxe7#
- 2.Bf4#
- 2.Bc7#
- 2.Bb8#
- 2.Qxe7#
- 2.Qg8#
- 1...Bxe8!
- 1...Be7
- 1.Sc3+?
- Keys
- 1.g6!
- threat
- 2.Qf5#
- 1...Qd4+
- 2.Bxd4#
- 1...Qd8+
- 2.Bf6#
- 1...Qb4+
- 2.Bd4#
- 1...Be7+
- 2.Sf6#
- 1...Qxb3
- 2.Bc3#
- 1...Bxe5
- 2.Qxe5#
- 1...hxg6
- 2.Qxg6#
- threat
- 1.g6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- Q(c);CHECK,P_SPINB(d)::R(B)+B(F),XQ(c)
- Q(c);P_SPINB(d)::R(B)+B(F)
- Q(c);CHECK,P_SPINB(d)::R(B)+B(F)
- B(d);OGATE,P_SPINQ(c)::R(B)+B(F),XB(d)
- Tries
- Try
- S(E);CHECK
- Refutation
- K(e);P-FLIGHT
- Try
- S(E);CHECK
- Vars
- Q(c);P_SPINB(d),XB(A)::R(B)+B(F)
- Refutation
- K(e);P-FLIGHT
- Try
- S(E);CHECK
- Vars
- Q(c);P_SPINB(d),XB(A)::R(B)+B(F)
- Refutation
- K(e);P-FLIGHT,XS(E)
- Try
- B(F);CHECK,XB(d)
- Refutation
- K(e);P-FLIGHT,P_SPINQ(c),XB(F)
- Try
- B(F);CHECK
- Refutation
- B(d);P_SPINB(d),P_SPINQ(c)
- Try
- Q(H);XP(b)
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,P_SPINB(d)::R(B)+B(F),XQ(c)
- Q(c);CHECK,P_SPINB(d)::R(B)+B(F)
- Q(c);N_GUARD,P_SPINB(d),XB(A)::R(B)+B(F)
- B(d);P_SPINB(d),P_SPINQ(c),XB(F)::QAR1(H)
- B(g);::QAB1(H)
- S(a);::QAB1(H)
- Refutation
- S(a);CHECK,XQ(H)
- Try
- Q(H);CHECK
- Refutation
- B(g);XQ(H)
- Try
- Actual
- P(G);
- Threat
- QAB1(H)
- Vars
- Q(c);CHECK,P_SPINB(d)::R(B)+B(F),XQ(c)
- Q(c);CHECK,N_GUARD,P_SPINB(d)::R(B)+B(F)
- Q(c);CHECK,P_SPINB(d)::R(B)+B(F)
- B(d);CHECK,P_SPINQ(c),SBLOCK::B(A)+S(E)
- Q(c);N_GUARD,P_SPINB(d),XB(A)::R(B)+B(F)
- B(d);OGATE,P_SPINB(d),P_SPINQ(c),XB(F)::QAR1(H),XB(d)
- P(h);OGATE,XP(G)::QAR2(H),XP(h)
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).