MESON Chess Problem Database
Problem Display
PID: 21323 (4r1b1/4n1q1/1BR3Pp/7r/2B2P2/Ppk2NQ1/3R1KP1/8 w - - 0 1)
Ellerman, Arnoldo
1st Prize, Good Companions (December), 1918
#2
11 + 8
| 3132 | The Good Companion Two-Mover | 1922 |
| 133 | The Problemist Supplement | 2003 |
SOLUTION
- SOUND
- Sets
- 1...Qd4+
- 2.Bxd4#
- 1...Qf8
- 2.Bd4#
- 1...Qxg6
- 2.Bd4#
- 1...Qf7
- 2.Bd4#
- 1...Qh7
- 2.Bd4#
- 1...Rh1
- 2.Ba5#
- 1...Rh2
- 2.Ba5#
- 1...Rh3
- 2.Ba5#
- 1...Rh4
- 2.Ba5#
- 1...Ra5
- 2.Bxa5#
- 1...Re5
- 2.Bd4#
- 1...Bd5
- 2.Ba5#
- 1...Sd5
- 2.Bf1#
- 2.Be2#
- 2.Bd3#
- 2.Bb5#
- 2.Bxd5#
- 2.Ba6#
- 1...Sf5
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bxg8#
- 2.Ba5#
- 1...Sxg6
- 2.Bd5#
- 1...Sc8
- 2.Bd5#
- 1...Qd4+
- Tries
- 1.Bf1+?
- 1...Rc5
- 2.Ba5#
- 1...Bc4
- 2.Rxc4#
- 1...Sxc6!
- 1...Rc5
- 1.Be2+?
- 1...Rc5
- 2.Ba5#
- 1...Bc4
- 2.Rxc4#
- 1...Sxc6!
- 1...Rc5
- 1.Bd3+?
- 1...Rc5
- 2.Ba5#
- 1...Bc4
- 2.Rxc4#
- 1...Sxc6!
- 1...Rc5
- 1.Bb5+?
- 1...Rc5
- 2.Ba5#
- 1...Bc4
- 2.Ba5#
- 2.Rxc4#
- 1...Sxc6!
- 1...Rc5
- 1.Ba6+?
- 1...Rc5
- 2.Ba5#
- 1...Bc4
- 2.Rxc4#
- 1...Sxc6!
- 1...Rc5
- 1.Be6+?
- 1...Rc5
- 2.Ba5#
- 2.Rxc5#
- 1...Sxc6!
- 1...Rc5
- 1.Bf7+?
- 1...Rc5
- 2.Ba5#
- 2.Rxc5#
- 1...Sxc6!
- 1...Rc5
- 1.Bxg8+?
- 1...Rc5
- 2.Ba5#
- 2.Rxc5#
- 1...Sxc6!
- 1...Rc5
- 1.Re2?
- threat
- 2.Se1#
- 2.Sg1#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sg5#
- 1...Qd4+
- 2.Sxd4#
- 2.Bxd4#
- 1...Qxg6
- 2.Bd4#
- 1...Sxc6
- 2.Se5#
- 1...Sxg6
- 2.Se5#
- 1...Qe5
- 2.Sxe5#
- 1...Rh2
- 2.Se1#
- 2.Sg1#
- 2.Sxh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sg5#
- 2.Ba5#
- 1...Rh3
- 2.Ba5#
- 1...Rh4
- 2.Se1#
- 2.Sg1#
- 2.Sh2#
- 2.Sd4#
- 2.Sxh4#
- 2.Se5#
- 2.Sg5#
- 2.Ba5#
- 1...Rd5
- 2.Sd4#
- 1...Re5
- 2.Sxe5#
- 2.Bd4#
- 1...Rg5
- 2.Sxg5#
- 1...Rd8
- 2.Sd4#
- 1...Bd5
- 2.Ba5#
- 1...Sd5
- 2.Bb5#
- 2.Ba6#
- 1...Sf5
- 2.Ba5#
- 1...Sc8
- 2.Se5#
- 1...Rc5!
- threat
- 1.Bf1+?
- Keys
- 1.Ke1!
- threat
- 2.Sg1#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sg5#
- 1...Qe5+
- 2.Sxe5#
- 1...Rh1+
- 2.Sg1#
- 1...Re5+
- 2.Sxe5#
- 1...Sd5+
- 2.Be2#
- 1...Sf5+
- 2.Be6#
- 1...Sxc6+
- 2.Se5#
- 1...Sxg6+
- 2.Se5#
- 1...Sc8+
- 2.Se5#
- 1...Qxg6
- 2.Bd4#
- 1...Rc5
- 2.Se5#
- 1...Qd4
- 2.Sxd4#
- 2.Bxd4#
- 1...Rh2
- 2.Sg1#
- 2.Sxh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sg5#
- 2.Ba5#
- 1...Rh3
- 2.Ba5#
- 1...Rh4
- 2.Sg1#
- 2.Sh2#
- 2.Sd4#
- 2.Sxh4#
- 2.Se5#
- 2.Sg5#
- 2.Ba5#
- 1...Rd5
- 2.Sd4#
- 1...Rg5
- 2.Sxg5#
- 1...Rd8
- 2.Sd4#
- 1...Bd5
- 2.Ba5#
- threat
- 1.Ke1!
There are these versions: 83693
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 8
- REMOVED MATES = 7
- Sets
- Q(f);CHECK,N_GUARD::B(I),XQ(f)
- Q(f);N_GUARD::B(I)
- Q(f);N_GUARD,XP(K)::B(I)
- R(c);N_GUARD::B(I)
- R(c);N_GUARD,P_PINP(C)::B(I)
- R(c);N_GUARD::B(I),XR(c)
- R(c);S_CUTQ(f)::B(I)
- B(h);S_CUTR(c)::B(I)
- S(e);N_GUARD,XP(K)::R(J)+B(G)
- S(e);N_GUARD::R(J)+B(G)
- Tries
- Try
- B(G);CHECK
- Vars
- R(c);P_SPINR(c)::B(I)
- B(h);N_GUARD,P_SPINB(h)::R1(J),XB(h)
- Refutation
- S(e);XR(J)
- Try
- B(G);CHECK
- Vars
- R(c);P_SPINR(c)::B(I)
- B(h);N_GUARD,P_SPINB(h)::R1(J),XB(h)
- Refutation
- S(e);XR(J)
- Try
- B(G);CHECK
- Vars
- R(c);P_SPINR(c)::B(I)
- B(h);N_GUARD,P_SPINB(h)::R1(J),XB(h)
- Refutation
- S(e);XR(J)
- Try
- B(G);CHECK
- Vars
- R(c);P_SPINR(c)::B(I)
- Refutation
- S(e);XR(J)
- Try
- B(G);CHECK
- Vars
- R(c);P_SPINR(c)::B(I)
- B(h);N_GUARD,P_SPINB(h)::R1(J),XB(h)
- Refutation
- S(e);XR(J)
- Try
- B(G);CHECK
- Refutation
- S(e);XR(J)
- Try
- B(G);CHECK
- Refutation
- S(e);XR(J)
- Try
- B(G);CHECK,XB(h)
- Refutation
- S(e);XR(J)
- Try
- R(A);
- Threat
- DUALS(7)
- Vars
- Q(f);N_GUARD,XP(K)::B(I)
- S(e);XR(J)::QAR(F)+S(E)
- S(e);XP(K)::QAR(F)+S(E)
- Q(f);::QAR(F)+S(E),XQ(f)
- R(c);N_GUARD::B(I)
- R(c);::QAR(F)+S(E)
- R(c);::QAR(F)+S(E),XR(c)
- R(g);::QAR(F)+S(E)
- B(h);S_CUTR(c)::B(I)
- S(e);S_CUTR(c)::B(I)
- S(e);::QAR(F)+S(E)
- Refutation
- R(c);
- Try
- Actual
- K(B);S_FLIGHT
- Threat
- DUALS(6)
- Vars
- Q(f);CHECK::QAR(F)+S(E),XQ(f)
- R(c);CHECK::QAR(F)+S(E)
- R(c);CHECK::QAR(F)+S(E),XR(c)
- S(e);CHECK,N_GUARD,S_CUTB(h),S_CUTR(c)::R(J)+B(G)
- S(e);CHECK,N_GUARD,S_CUTR(c)::R(J)+B(G)
- S(e);CHECK,XR(J)::QAR(F)+S(E)
- S(e);CHECK,XP(K)::QAR(F)+S(E)
- S(e);CHECK::QAR(F)+S(E)
- Q(f);N_GUARD,XP(K)::B(I)
- R(c);::QAR(F)+S(E)
- R(c);N_GUARD::B(I)
- R(c);::QAR(F)+S(E),XR(c)
- R(g);::QAR(F)+S(E)
- B(h);S_CUTR(c)::B(I)
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).