MESON Chess Problem Database
Problem Display
PID: 65063 (4n3/4Np2/p2P3K/RB2kPP1/1p1rN2p/2n1Q3/1B1R4/b1r2b2 w - - 0 1)
Ellerman, Arnoldo
Good Companions (March), 1922
#2
11 + 11
| 3132 | The Good Companion Two-Mover | 1922 |
| 3391 | Het Half Pin Thema | 1924 |
SOLUTION
- SOUND
- Sets
- 1...Rxd2
- 2.Bd3#
- 1...Rd3
- 2.Bxd3#
- 1...Rc4
- 2.Bxc4#
- 2.Rd5#
- 1...Rxe4
- 2.Bxf1#
- 2.Be2#
- 2.Bc4#
- 2.Rd5#
- 1...Rd5
- 2.Rxd5#
- 1...Rxd6+
- 2.Sxd6#
- 2.Sf6#
- 1...Sb1
- 2.Bc4#
- 1...Sd1
- 2.Bc4#
- 1...Sa2
- 2.Bc4#
- 1...Se2
- 2.Bc4#
- 1...Rxd2
- Tries
- 1.Sxc3+?
- 1...Re4
- 2.Bxf1#
- 2.Be2#
- 2.Bc4#
- 2.Rd5#
- 2.Qxe4#
- 1...Kxd6!
- 1...Re4
- 1.Sc6+?
- 1...Kd5
- 2.Rxd4#
- 2.Qxd4#
- 1...Kxf5!
- 1...Kd5
- 1.Sg6+?
- 1...Kd5
- 2.Rxd4#
- 2.Qxd4#
- 1...Kxf5
- 2.Bd7#
- 1...fxg6!
- 1...Kd5
- 1.Bxf1+?
- 1...Rd5
- 2.Rdxd5#
- 2.Raxd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sb5!
- 1...Rd5
- 1.Be2+?
- 1...Rd5
- 2.Rdxd5#
- 2.Raxd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sb5!
- 1...Rd5
- 1.Bd3+?
- 1...Rd5
- 2.Rxd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sb5!
- 1...Rd5
- 1.Bc4+?
- 1...Rd5
- 2.Rdxd5#
- 2.Raxd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sb5!
- 1...Rd5
- 1.Rxd4?
- threat
- 2.Sxc3#
- 2.Rd5#
- 1...Bxb2
- 2.Sxc3#
- 1...Sxe4
- 2.Bc4#
- 2.Rd5#
- 2.Qxe4#
- 1...Sxb5
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sf6#
- 2.Rd5#
- 1...Sxd6
- 2.Rd5#
- 1...Rd1
- 2.Sxc3#
- 1...Re1
- 2.Rd5#
- 1...Bg2
- 2.Rd5#
- 1...Bd3
- 2.Rd5#
- 1...Bc4
- 2.Sxc3#
- 1...Sb1
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sf6#
- 2.Bc4#
- 2.Rd5#
- 1...Sd1
- 2.Bc4#
- 2.Rd5#
- 1...Sa2
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sf6#
- 2.Bc4#
- 2.Rd5#
- 1...Se2
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sf6#
- 2.Bc4#
- 2.Rd5#
- 1...Sa4
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sf6#
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sc7
- 2.Sxc3#
- 1...Sf6!
- threat
- 1.Sxc3+?
- Keys
- 1.Rf2!
- threat
- 2.Qf4#
- 1...Rxd6+
- 2.Sf6#
- 1...Rxe4
- 2.Qc5#
- 1...Rdd1
- 2.Bd3#
- 1...Rd2
- 2.Bd3#
- 1...Rd3
- 2.Bxd3#
- 1...Rc4
- 2.Bxc4#
- 1...Rd5
- 2.Sc6#
- 1...Se2
- 2.Bc4#
- 1...Sd5
- 2.Qxd4#
- threat
- 1.Rf2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- R(f);N_GUARD,P_SPINS(d),XR(B)::R(E)+B(F)
- R(f);N_GUARD,P_SPINS(d)::R(E)+B(F),XR(f)
- R(f);OGATE,P_SPINS(d)::R1(B),XR(f)
- S(d);N_GUARD,P_SPINR(f)::R(E)+B(F)
- Tries
- Try
- S(D);CHECK,XS(d)
- Refutation
- K(h);P_SPINR(f),S_FLIGHT,XP(I)
- Try
- S(K);CHECK
- Refutation
- K(h);P-FLIGHT,XP(G)
- Try
- S(K);CHECK
- Vars
- K(h);P-FLIGHT,XP(G)::R(E)+B(F),DCHECK
- Refutation
- P(j);XS(K)
- Try
- B(F);CHECK,XB(c)
- Vars
- S(d);N_GUARD,P_SPINR(f),P_SPINS(d)::R1(E),XS(d)
- Refutation
- S(d);P_SPINR(f),P_SPINS(d)
- Try
- B(F);CHECK
- Vars
- S(d);N_GUARD,P_SPINR(f),P_SPINS(d)::R1(E),XS(d)
- Refutation
- S(d);P_SPINR(f),P_SPINS(d)
- Try
- B(F);CHECK
- Vars
- R(f);N_GUARD,P_SPINR(f),P_SPINS(d)::R1(E),XR(f)
- S(d);N_GUARD,P_SPINR(f),P_SPINS(d)::R1(E),XS(d)
- Refutation
- S(d);P_SPINR(f),P_SPINS(d)
- Try
- B(F);CHECK
- Vars
- S(d);N_GUARD,P_SPINR(f),P_SPINS(d)::R1(E),XS(d)
- Refutation
- S(d);P_SPINR(f),P_SPINS(d)
- Try
- R(B);XR(f)
- Threat
- DUALS(2)
- Vars
- B(a);XB(A)::QAR(C)+S(D),XS(d)
- S(k);XP(I)::R1(B)
- R(b);::QAR(C)+S(D),XS(d)
- R(b);::R1(B)
- B(c);::R1(B)
- B(c);::QAR(C)+S(D),XS(d)
- S(d);::B(A)+R(B),DCHECK,XS(d)
- S(k);::QAR(C)+S(D),XS(d)
- Refutation
- S(k);
- Try
- Actual
- R(B);
- Threat
- QAB1(C)
- Vars
- R(f);CHECK,N_GUARD,P_SPINS(d),SBLOCK,XP(I)::QAR(C)+S(D)
- R(f);OGATE,P_SPINR(f),P_SPINS(d),SBLOCK,XS(D)::QAR2(C)
- R(f);N_GUARD,P_SPINS(d)::R(E)+B(F)
- R(f);N_GUARD,P_SPINS(d)::R(E)+B(F),XR(f)
- R(f);P_SPINS(d),SBLOCK::S(K)
- S(d);N_GUARD,P_SPINR(f)::R(E)+B(F)
- S(d);P_SPINR(f)::QAB1(C),XR(f)
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