MESON Chess Problem Database
Problem Display
PID: 64608 (2n5/1N6/1P1p3p/1p2p2R/1Rq1kNQn/1B2B3/ppP2P2/bb1K4 w - - 0 1)
Rothstein, Louis
3rd Prize, Good Companions (April Complete Blocks), 1921
#2
11 + 12
| 3132 | The Good Companion Two-Mover | 1922 |
| 1996 | BCSC Starter | 1992-1993 |
SOLUTION
- SOUND
- Sets
- 1...Qxb4
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sd5#
- 2.Se6#
- 2.Sg6#
- 2.Bd5#
- 1...Qd4+
- 2.Sd3#
- 1...Bxc2+
- 2.Bxc2#
- 1...Sg2
- 2.Qxg2#
- 1...Sf3
- 2.Qf5#
- 2.Qg6#
- 1...Sf5
- 2.Qg2#
- 1...Sg6
- 2.Qg2#
- 1...Sxb6
- 2.Sxd6#
- 1...Sa7
- 2.Sxd6#
- 1...Se7
- 2.Sxd6#
- 1...exf4
- 2.Qxf4#
- 1...d5
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Se6#
- 2.Sg6#
- 2.Sc5#
- 1...Qxb4
- Tries
- 1.Bxc4?
- threat
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sd5#
- 2.Se6#
- 2.Sg6#
- 2.Bf1#
- 2.Bxa2#
- 2.Be2#
- 2.Bb3#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 1...Sxb6
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sd5#
- 2.Se6#
- 2.Sg6#
- 2.Sxd6#
- 2.Bd3#
- 2.Bd5#
- 1...bxc4
- 2.Rxc4#
- 1...exf4
- 2.Bf1#
- 2.Bxa2#
- 2.Be2#
- 2.Bb3#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 2.Qxf4#
- 1...Sg2
- 2.Sxg2#
- 2.Bf1#
- 2.Bxa2#
- 2.Be2#
- 2.Bb3#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 2.Qxg2#
- 1...Sf3
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sd5#
- 2.Se6#
- 2.Sg6#
- 2.Bd3#
- 2.Bd5#
- 2.Qf5#
- 2.Qg6#
- 1...Sf5
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sd5#
- 2.Se6#
- 2.Sg6#
- 2.Bd3#
- 2.Bd5#
- 2.Qg2#
- 1...Sg6
- 2.Sxg6#
- 2.Bf1#
- 2.Bxa2#
- 2.Be2#
- 2.Bb3#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 2.Qg2#
- 1...d5
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Se6#
- 2.Sg6#
- 2.Sc5#
- 2.Bd3#
- 2.Bxd5#
- 1...Bxc2+!
- threat
- 1.Bc5?
- 1...Qd4+
- 2.Sd3#
- 1...Bxc2+
- 2.Bxc2#
- 1...Qxb4
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sd5#
- 2.Se6#
- 2.Sg6#
- 2.Bd5#
- 1...Sxb6
- 2.Sxd6#
- 1...exf4
- 2.Qe2#
- 1...Sa7
- 2.Sxd6#
- 1...Sg2
- 2.f3#
- 1...Sf3
- 2.Qf5#
- 1...Sf5
- 2.f3#
- 1...Sg6
- 2.f3#
- 1...Se7
- 2.Sxd6#
- 1...d5
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Se6#
- 2.Sg6#
- 1...dxc5!
- 1...Qd4+
- 1.Rxe5+?
- 1...dxe5
- 2.Sc5#
- 1...Kxe5!
- 1...dxe5
- 1.Qg2+?
- 1...Sf3
- 2.Qg6#
- 1...Sxg2!
- 1...Sf3
- 1.Qg3?
- 1...Bxc2+
- 2.Bxc2#
- 1...Qxb4
- 2.Bd5#
- 1...Sxb6
- 2.Sxd6#
- 1...exf4
- 2.Qxf4#
- 1...Sa7
- 2.Sxd6#
- 1...Sg2
- 2.Qxg2#
- 1...Sf3
- 2.Qg6#
- 1...Sf5
- 2.Qg2#
- 1...Sg6
- 2.Qg2#
- 1...Se7
- 2.Sxd6#
- 1...d5
- 2.Sc5#
- 1...Qd4+!
- 1...Bxc2+
- 1.Bxc4?
- Keys
- 1.Qe2!
- 1...Qd4+
- 2.Bd2#
- 1...Bxc2+
- 2.Bxc2#
- 1...Qxb4
- 2.Bd5#
- 1...Sxb6
- 2.Sxd6#
- 1...exf4
- 2.Bc5#
- 1...Sa7
- 2.Sxd6#
- 1...Sg2
- 2.f3#
- 1...Sf3
- 2.Qd3#
- 1...Sf5
- 2.f3#
- 1...Sg6
- 2.f3#
- 1...Se7
- 2.Sxd6#
- 1...d5
- 2.Sc5#
- 1...Qd4+
- 1.Qe2!
There are these versions: 101399
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(e);CHECK::QAR(H)+S(G)
- B(b);CHECK,OGATE,XP(B)::B(D),XB(b)
- S(g);N_GUARD::QAB(H),XS(g)
- S(g);N_GUARD::QAB(H)
- S(l);N_GUARD,XP(J)::S(K),XP(j)
- S(l);N_GUARD::S(K),XP(j)
- P(i);OGATE,P_SPINP(i),XS(G)::QAR1(H),XP(i)
- Tries
- Try
- B(D);XQ(e)
- Threat
- DUALS(17)
- Vars
- P(h);OGATE,P_SPINP(h),XB(D)::R(F),XP(h)
- Refutation
- B(b);CHECK,XP(B)
- Try
- B(E);
- Vars
- Q(e);CHECK::QAR(H)+S(G)
- B(b);CHECK,OGATE,XP(B)::B(D),XB(b)
- S(l);N_GUARD,XP(J)::S(K),XP(j)
- P(i);P_SPINP(i),SBLOCK,XS(G)::QAR2(H)
- S(l);N_GUARD::S(K),XP(j)
- S(g);N_GUARD::P(C)
- S(g);N_GUARD,SBLOCK::QAB1(H)
- Refutation
- P(j);XB(E)
- Try
- R(I);CHECK,XP(i)
- Vars
- P(j);SBLOCK,XR(I)::S(K)
- Refutation
- K(f);N_SPINQ(e),P-FLIGHT,XR(I)
- Try
- Q(H);CHECK
- Vars
- S(g);N_GUARD,P_SPINS(g),SBLOCK::QAB(H)
- Refutation
- S(g);XQ(H)
- Try
- Q(H);
- Vars
- B(b);CHECK,OGATE,XP(B)::B(D),XB(b)
- Q(e);N_SPINQ(e),OGATE,XR(F)::B(D)
- S(l);N_GUARD,XP(J)::S(K),XP(j)
- P(i);OGATE,XS(G)::QAR1(H),XP(i)
- S(l);N_GUARD::S(K),XP(j)
- S(g);N_GUARD::QAB(H),XS(g)
- S(g);N_GUARD,SBLOCK::QAB(H)
- S(g);N_GUARD::QAB(H)
- P(j);N_GUARD::S(K)
- Refutation
- Q(e);CHECK
- Try
- Actual
- Q(H);
- Vars
- Q(e);CHECK::QAR(H)+B(E)
- B(b);CHECK,OGATE,XP(B)::B(D),XB(b)
- Q(e);N_SPINQ(e),OGATE,XR(F)::B(D)
- S(l);N_GUARD,XP(J)::S(K),XP(j)
- P(i);SBLOCK,XS(G)::QAR(H)+B(E)
- S(l);N_GUARD::S(K),XP(j)
- S(g);N_GUARD::P(C)
- S(g);SBLOCK::QAB1(H)
- P(j);N_GUARD::S(K)
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).