MESON Chess Problem Database
Problem Display
PID: 21676 (2N3bK/1pRn1B2/2qprp2/1R1r1N2/P1k3p1/B2p4/1PP4b/1n1Q4 w - - 0 1)
Ellerman, Arnoldo
Good Companions (July), 1920
#2
11 + 13
| 3132 | The Good Companion Two-Mover | 1922 |
| 133 | The Problemist Supplement | 2003 |
SOLUTION
- SOUND
- Sets
- 1...Qc5
- 2.Rb4#
- 1...Rd4
- 2.Se3#
- 1...Rxb5
- 2.Qxd3#
- 1...Rc5
- 2.Qxd3#
- 1...Rde5
- 2.Scxd6#
- 2.Qxd3#
- 2.cxd3#
- 1...Rxf5
- 2.Qxd3#
- 1...Re1
- 2.Qxd3#
- 2.cxd3#
- 1...Re2
- 2.Qxd3#
- 2.cxd3#
- 1...Re4
- 2.Qxd3#
- 2.cxd3#
- 1...Ree5
- 2.Scxd6#
- 2.Qxd3#
- 2.cxd3#
- 1...Re7
- 2.Qxd3#
- 2.cxd3#
- 1...Re8
- 2.Qxd3#
- 2.cxd3#
- 1...Sc3
- 2.b3#
- 1...Sc5
- 2.Rb4#
- 1...Se5
- 2.Sb6#
- 1...Sb6
- 2.Sxb6#
- 1...Sb8
- 2.Sb6#
- 1...Sf8
- 2.Sb6#
- 1...dxc2
- 2.Qxd5#
- 1...Qc5
- Tries
- 1.Rxc6+?
- 1...Rc5
- 2.Qxd3#
- 1...Sc5
- 2.Sb6#
- 2.Rb4#
- 1...bxc6!
- 1...Rc5
- 1.Qf3?
- threat
- 2.Qxd5#
- 1...Rxb5
- 2.Qe4#
- 2.Qxd3#
- 1...Rxf5
- 2.Qe4#
- 2.Qxd3#
- 1...Qc5
- 2.Rb4#
- 1...Rd4
- 2.Se3#
- 1...Rc5
- 2.Rb4#
- 2.Qxd3#
- 2.cxd3#
- 1...Rde5
- 2.Scxd6#
- 2.Qxd3#
- 2.cxd3#
- 1...Re4
- 2.Qxe4#
- 2.Qxd3#
- 2.cxd3#
- 1...Ree5
- 2.Scxd6#
- 2.Qxd3#
- 2.cxd3#
- 1...Sc3
- 2.b3#
- 1...Sc5
- 2.Rb4#
- 1...Sb6
- 2.Sxb6#
- 1...gxf3!
- threat
- 1.Qxg4+?
- 1...Rd4
- 2.Se3#
- 2.Qxd4#
- 1...Re4
- 2.Qxe4#
- 1...Bf4!
- 1...Rd4
- 1.Qd2?
- threat
- 2.Qb4#
- 2.b3#
- 1...Rxb5
- 2.Qxd3#
- 1...Rxf5
- 2.Qb4#
- 2.Qxd3#
- 1...dxc2
- 2.Qxd5#
- 2.b3#
- 1...Rc5
- 2.Qxd3#
- 1...Sc3
- 2.Qxc3#
- 2.b3#
- 1...Sc5
- 2.Rb4#
- 2.Qb4#
- 1...Sxd2!
- threat
- 1.Rxc6+?
- Keys
- 1.Qh1!
- threat
- 2.Qxd5#
- 1...Rxb5
- 2.Qe4#
- 1...Rxf5
- 2.Qe4#
- 1...Qc5
- 2.Rb4#
- 1...Rd4
- 2.Se3#
- 1...Rc5
- 2.Rb4#
- 1...Rde5
- 2.Scxd6#
- 1...Re4
- 2.Qxe4#
- 1...Ree5
- 2.Scxd6#
- 1...Sc3
- 2.b3#
- 1...Sc5
- 2.Rb4#
- 1...Sb6
- 2.Sxb6#
- threat
- 1.Qh1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- Q(g);::R1(F)
- R(f);P_SPINR(i),SBLOCK::S(G)
- R(f);N_GUARD,P_SPINR(i),XR(F)::QAB1(A),XP(c)
- R(f);N_GUARD,N_SPINQ(g),P_SPINR(i)::QAB1(A),XP(c)
- R(f);N_GUARD,P_SPINR(i),XS(G)::QAB1(A),XP(c)
- S(a);SBLOCK::P(B)
- S(l);N_SPINQ(g),SBLOCK::R1(F)
- S(l);N_GUARD::S(J)
- S(l);N_GUARD::S(J),XS(l)
- P(c);OGATE,XP(C)::QAB1(A),XR(f)
- Tries
- Try
- R(H);CHECK,XQ(g)
- Vars
- R(f);P_SPINR(f)::QAB1(A),XP(c)
- Refutation
- P(k);XR(H)
- Try
- Q(A);
- Threat
- QAB1(A),XR(f)
- Vars
- Q(g);::R1(F)
- R(f);P_SPINR(i),SBLOCK::S(G)
- S(a);SBLOCK::P(B)
- S(l);N_SPINQ(g),SBLOCK::R1(F)
- S(l);N_GUARD::S(J),XS(l)
- Refutation
- P(e);XQ(A)
- Try
- Q(A);CHECK,XP(e)
- Vars
- R(i);N_GUARD,P_SPINR(i),S_CUTR(f)::QAR2(A),XR(i)
- Refutation
- B(b);P_SPINB(b)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(f);N_GUARD,P_SPINR(i),XR(F)::QAB1(A),XP(c)
- R(f);N_GUARD,N_SPINQ(g),P_SPINR(i)::QAB1(A),XP(c)
- Refutation
- S(a);XQ(A)
- Try
- Actual
- Q(A);
- Threat
- QAB1(A),XR(f)
- Vars
- R(f);N_GUARD,P_SPINR(i),XR(F)::QAR2(A)
- R(f);N_GUARD,P_SPINR(i),XS(G)::QAR2(A)
- Q(g);::R1(F)
- R(f);P_SPINR(i),SBLOCK::S(G)
- R(f);N_SPINQ(g),P_SPINR(i),SBLOCK::R1(F)
- R(f);N_GUARD,P_SPINR(i),S_CUTB(b)::S(J),XP(h)
- R(i);N_GUARD,P_SPINR(f)::QAR2(A),XR(i)
- R(i);N_GUARD,P_SPINR(f),S_CUTB(b)::S(J),XP(h)
- S(a);SBLOCK::P(B)
- S(l);N_SPINQ(g),SBLOCK::R1(F)
- S(l);N_GUARD::S(J),XS(l)
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