MESON Chess Problem Database
Problem Display
PID: 64534 (2B4n/6K1/2NB2Qp/3pR3/1R1qrk1P/b4p2/3P3n/1r2Nb2 w - - 0 1)
Ellerman, Arnoldo
3rd HM.=, Good Companions (November), 1920
#2
10 + 11
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Rexe4#
- 2.Rxd5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Qf2
- 2.Rexe4#
- 2.Rxd5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Qe3
- 2.Rexe4#
- 2.Rxd5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Qc5
- 2.Rexe4#
- 2.Rf5#
- 1...Qxe5+
- 2.Bxe5#
- 1...Qb6
- 2.Rexe4#
- 2.Rxd5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Qa7+
- 2.Re7#
- 1...Qxd2
- 2.Rexe4#
- 1...Qd3
- 2.Rexe4#
- 2.Rxd5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Qxb4
- 2.Rxe4#
- 2.Rf5#
- 1...Qc4
- 2.Rxe4#
- 2.Rf5#
- 1...Re2
- 2.Sd3#
- 1...Re3
- 2.dxe3#
- 1...Rxe5
- 2.Bxe5#
- 2.Rxd4#
- 1...Sg4
- 2.Qxg4#
- 1...h5
- 2.Qg5#
- 1...Qg1
- Tries
- 1.Kh7?
- threat
- 2.Rxe4#
- 2.Rf5#
- 1...Qa7+
- 2.Re7#
- 1...Qxe5
- 2.Bxe5#
- 1...Qxd2
- 2.Rexe4#
- 1...Rexe1
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 1...Rxe5
- 2.Bxe5#
- 2.Rxd4#
- 1...Re2
- 2.Sd3#
- 2.Rxe2#
- 2.Re3#
- 2.Re4#
- 1...Re3
- 2.Rxe3#
- 2.Re4#
- 2.dxe3#
- 1...Sxg6!
- threat
- 1.Kf8?
- threat
- 2.Rxe4#
- 2.Rf5#
- 1...Qxe5
- 2.Bxe5#
- 1...Qxd2
- 2.Rexe4#
- 1...Rexe1
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 1...Rxe5
- 2.Bxe5#
- 2.Rxd4#
- 1...Re2
- 2.Sd3#
- 2.Rxe2#
- 2.Re3#
- 2.Re4#
- 1...Re3
- 2.Rxe3#
- 2.Re4#
- 2.dxe3#
- 1...Sxg6+!
- threat
- 1.Kg8?
- threat
- 2.Rxe4#
- 2.Rf5#
- 1...Qxe5
- 2.Bxe5#
- 1...Qxd2
- 2.Rexe4#
- 1...Rexe1
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 1...Rxe5
- 2.Bxe5#
- 2.Rxd4#
- 1...Re2
- 2.Sd3#
- 2.Rxe2#
- 2.Re3#
- 2.Re4#
- 1...Re3
- 2.Rxe3#
- 2.Re4#
- 2.dxe3#
- 1...Sxg6!
- threat
- 1.Sd3+?
- 1...Qxd3
- 2.Rexe4#
- 2.Rxd5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Bxd3!
- 1...Qxd3
- 1.Sxd4?
- threat
- 2.Se6#
- 2.Rxe4#
- 2.Rf5#
- 1...Rexe1
- 2.Se2#
- 2.Se6#
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 1...Rxd4
- 2.Rxd4#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Rxd5#
- 2.Rg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Rxe5
- 2.Se2#
- 2.Se6#
- 1...Sg4
- 2.Rxe4#
- 2.Rf5#
- 2.Qxg4#
- 1...Re2
- 2.Sd3#
- 2.Sxe2#
- 2.Se6#
- 2.Rxe2#
- 2.Re3#
- 2.Re4#
- 1...Re3
- 2.Se2#
- 2.Se6#
- 2.Rxe3#
- 2.Re4#
- 2.dxe3#
- 1...Bh3
- 2.Sd3#
- 2.Rxe4#
- 2.Rf5#
- 1...Sxg6!
- threat
- 1.Rxd4?
- threat
- 2.Rexe4#
- 2.Rf5#
- 1...Rxd4
- 2.Re4#
- 1...Bxd6
- 2.Rf5#
- 1...Sxg6
- 2.Rexe4#
- 1...Rb7+!
- threat
- 1.Kh7?
- Keys
- 1.Qg1!
- threat
- 2.Qxh2#
- 1...Qxg1+
- 2.Rg5#
- 1...Qxe5+
- 2.Bxe5#
- 1...Qa7+
- 2.Re7#
- 1...Qxd2
- 2.Rexe4#
- 2.Rxd5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Re7#
- 2.Re8#
- 1...Rxe5
- 2.Rxd4#
- 1...Qf2
- 2.Rexe4#
- 2.Rxd5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Re7#
- 2.Re8#
- 1...Re2
- 2.Sd3#
- 1...Sg4
- 2.Qxg4#
- threat
- 1.Qg1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- Q(f);CHECK,OGATE,P_SPINQ(f),P_SPINR(g),XR(E)::B(G),XQ(f)
- Q(f);CHECK,N_PINR(E),P_SPINR(g)::B(G)+R(E)
- Q(f);N_PINR(E),P_SPINR(g),XP(B)::B(G)+R(E),DCHECK,XR(g)
- R(g);P_SPINQ(f),S_CUTB(b)::S(A)
- R(g);OGATE,P_SPINQ(f)::P(B),XR(g)
- S(c);N_GUARD::QAR1(H),XS(c)
- P(j);N_GUARD::QAB1(H)
- Tries
- Try
- K(I);N_SPINR(E),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,N_GUARD,P_SPINR(g)::B(G)+R(E)
- Q(f);OGATE,P_SPINQ(f),P_SPINR(g),XR(E)::B(G),XQ(f)
- Q(f);P_SPINR(g),XP(B)::B(G)+R(E),DCHECK,XR(g)
- Refutation
- S(k);XQ(H)
- Try
- K(I);N_SPINR(E),S_FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(f);OGATE,P_SPINQ(f),P_SPINR(g),XR(E)::B(G),XQ(f)
- Q(f);P_SPINR(g),XP(B)::B(G)+R(E),DCHECK,XR(g)
- Refutation
- S(k);CHECK,XQ(H)
- Try
- K(I);N_SPINR(E),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(f);OGATE,P_SPINQ(f),P_SPINR(g),XR(E)::B(G),XQ(f)
- Q(f);P_SPINR(g),XP(B)::B(G)+R(E),DCHECK,XR(g)
- Refutation
- S(k);XQ(H)
- Try
- S(A);CHECK
- Refutation
- B(b);XS(A)
- Try
- S(F);N_SPINR(E),XQ(f)
- Threat
- DUALS(3)
- Refutation
- S(k);XQ(H)
- Try
- R(C);N_SPINR(E),P_PINR(g),XQ(f)
- Threat
- DUALS(2)
- Vars
- R(g);N_SPINR(g),XR(C)::B(G)+R(E),DCHECK
- B(d);XB(G)::R1(E)
- S(k);XQ(H)::B(G)+R(E),DCHECK,XR(g)
- Refutation
- R(a);CHECK
- Try
- Actual
- Q(H);
- Threat
- QAB(H),XS(c)
- Vars
- Q(f);CHECK,N_PINR(E),P_SPINR(g),XQ(H)::B(G)+R(E)
- Q(f);CHECK,OGATE,P_SPINQ(f),P_SPINR(g),XR(E)::B(G),XQ(f)
- Q(f);CHECK,N_PINR(E),P_SPINR(g)::B(G)+R(E)
- R(g);OGATEB,P_SPINQ(f),P_SPINR(g),XR(E)::R(C),XQ(f)
- R(g);P_SPINQ(f),S_CUTB(b)::S(A)
- S(c);N_GUARD::QAR1(H),XS(c)
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).