MESON Chess Problem Database
Problem Display
PID: 235628 (4RQ2/8/2K3p1/4P3/1RBNk1pP/1Pnprb2/4PB1q/1N1r4 w - - 0 1)
Erokhin, Vladimir Alekseevich
Mat, 1977
#2
12 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Kxd4+
- 2.Bd5#
- 1...Rxe2
- 2.Sxc3#
- 1...Sxb1
- 2.Bd5#
- 1...Sa2
- 2.Bd5#
- 1...Sxe2
- 2.Bd5#
- 1...Sa4
- 2.Bd5#
- 1...Sb5
- 2.Bd5#
- 1...Sd5
- 2.Bxd5#
- 1...Kxd4+
- Tries
- 1.Sd2+?
- 1...Kxd4+
- 2.Bd5#
- 1...Rxd2!
- 1...Kxd4+
- 1.Sc2?
- threat
- 2.Sxc3#
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bg8#
- 1...Rxb1
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bg8#
- 1...Rxe2
- 2.Sxc3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bg8#
- 1...Bxe2
- 2.Sxc3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bg8#
- 1...Sxb1
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bg8#
- 1...Sxe2
- 2.Bd5#
- 1...dxc2
- 2.Bd3#
- 2.Bd5#
- 1...Sa2
- 2.Bxd3#
- 2.Bd5#
- 1...Sa4
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bg8#
- 1...Sb5
- 2.Bxd3#
- 2.Bxb5#
- 2.Bd5#
- 1...Sd5
- 2.Bxd3#
- 2.Bxd5#
- 1...d2
- 2.Bd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bg8#
- 1...dxe2!
- threat
- 1.Sxf3?
- threat
- 2.Sxc3#
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Be6#
- 2.Bg8#
- 1...Qxe5
- 2.Sxc3#
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bg8#
- 2.Rxe5#
- 1...Rxb1
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Be6#
- 2.Bg8#
- 1...Rxe2
- 2.Sxc3#
- 2.Sg5#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Be6#
- 2.Bg8#
- 1...Rxf3
- 2.Sxc3#
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bg8#
- 1...Sxb1
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Be6#
- 2.Bg8#
- 1...Sxe2
- 2.Bd5#
- 1...gxf3
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bg8#
- 1...Rc1
- 2.Sbd2#
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Be6#
- 2.Bg8#
- 1...Sa2
- 2.Bxd3#
- 2.Bd5#
- 1...Sa4
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Be6#
- 2.Bg8#
- 1...Sb5
- 2.Bxd3#
- 2.Bxb5#
- 2.Bd5#
- 1...Sd5
- 2.Bxd3#
- 2.Bxd5#
- 1...d2
- 2.Bd3#
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Be6#
- 2.Bg8#
- 1...dxe2!
- threat
- 1.Sb5?
- threat
- 2.S1xc3#
- 2.Bxd3#
- 2.Bd5#
- 2.Bg8#
- 1...Rxb1
- 2.Bxd3#
- 2.Bd5#
- 2.Bg8#
- 1...Rxe2
- 2.S1xc3#
- 2.S5xc3#
- 2.Sd6#
- 2.Bd5#
- 2.Bg8#
- 1...Bxe2
- 2.S1xc3#
- 2.Bd5#
- 2.Bg8#
- 1...Sxb1
- 2.Bxd3#
- 2.Bd5#
- 2.Bg8#
- 1...Sxe2
- 2.Bd5#
- 1...Sxb5
- 2.Bxd3#
- 2.Bxb5#
- 2.Bd5#
- 1...Rc1
- 2.Sd2#
- 2.Bxd3#
- 2.Bd5#
- 2.Bg8#
- 1...Sa2
- 2.Bxd3#
- 2.Bd5#
- 1...Sa4
- 2.Bxd3#
- 2.Bd5#
- 2.Bg8#
- 1...Sd5
- 2.Bxd3#
- 2.Bxd5#
- 1...d2
- 2.Bd3#
- 2.Bd5#
- 2.Bg8#
- 1...dxe2!
- threat
- 1.Be6?
- threat
- 2.Sxf3#
- 1...Kxe5+
- 2.Bd5#
- 1...Qxe5
- 2.Sxc3#
- 1...Bxe2
- 2.Sf3#
- 1...Sxe2
- 2.Bd5#
- 1...Sa2
- 2.Bd5#
- 1...Bh1
- 2.Sf3#
- 1...Bg2
- 2.Sf3#
- 1...Sb5
- 2.Bd5#
- 1...Sd5
- 2.Bxd5#
- 1...dxe2!
- threat
- 1.Bg8?
- threat
- 2.Sxc3#
- 2.Sc2#
- 2.Sxf3#
- 2.Sb5#
- 2.Sf5#
- 1...Rxb1
- 2.Sc2#
- 2.Sxf3#
- 2.Sb5#
- 2.Sf5#
- 1...Bxe2
- 2.Sxc3#
- 2.Sc2#
- 2.Sxe2#
- 2.Sf3#
- 2.Sb5#
- 1...Sxb1
- 2.Sc2#
- 2.Sxf3#
- 2.Sb5#
- 2.Sf5#
- 2.Bd5#
- 1...Sxe2
- 2.Sxe2#
- 2.Bd5#
- 1...Sa2
- 2.Bd5#
- 1...Rc1
- 2.Sd2#
- 2.Sc2#
- 2.Sxf3#
- 2.Sb5#
- 2.Sf5#
- 1...Bh1
- 2.Sxc3#
- 2.Sc2#
- 2.Sf3#
- 2.Sb5#
- 2.Sf5#
- 1...Bg2
- 2.Sxc3#
- 2.Sc2#
- 2.Sf3#
- 2.Sb5#
- 2.Sf5#
- 1...Sa4
- 2.Sc2#
- 2.Sxf3#
- 2.Sb5#
- 2.Sf5#
- 2.Bd5#
- 1...Sb5
- 2.Sxb5#
- 2.Bd5#
- 1...Sd5
- 2.Bxd5#
- 1...d2
- 2.Sc2#
- 2.Sxf3#
- 2.Sb5#
- 2.Sf5#
- 1...dxe2!
- threat
- 1.Qf5+?
- 1...Kxd4+
- 2.Bd5#
- 1...gxf5!
- 1...Kxd4+
- 1.exf3+?
- 1...Kxd4
- 2.Bb5#
- 2.Bd5#
- 2.Ba6#
- 2.Bf7#
- 2.Bg8#
- 2.Qc5#
- 1...Rxf3
- 2.Sxc3#
- 1...gxf3!
- 1...Kxd4
- 1.Sd2+?
- Keys
- 1.Bf7!
- threat
- 2.Bxg6#
- 1...Kf4+
- 2.Bd5#
- 1...Qf4
- 2.Sxc3#
- 1...g5
- 2.Bg6#
- threat
- 1.Bf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 8
- Sets
- K(g);CHECK,P-FLIGHT,P_SPINR(e),XS(G)::R(E)+B(F)
- R(e);XP(B)::S(A),XS(c)
- S(c);N_GUARD,XS(A)::B(F)
- S(c);N_GUARD::B(F)
- S(c);N_GUARD,XP(B)::B(F)
- S(c);N_GUARD::B(F),XS(c)
- Tries
- Try
- S(A);CHECK
- Vars
- K(g);CHECK,P-FLIGHT,P_SPINR(e),XS(G)::R(E)+B(F)
- Refutation
- R(a);XS(A)
- Try
- S(G);
- Threat
- DUALS(6)
- Vars
- S(c);XP(B)::R(E)+B(F),DCHECK
- Refutation
- P(d);XP(B)
- Try
- S(G);XB(f)
- Threat
- DUALS(7)
- Vars
- S(c);XP(B)::R(E)+B(F),DCHECK
- Refutation
- P(d);XP(B)
- Try
- S(G);
- Threat
- DUALS(4)
- Vars
- S(c);XP(B)::R(E)+B(F),DCHECK
- Refutation
- P(d);XP(B)
- Try
- B(F);
- Threat
- R(E)+S(G),XB(f)
- Vars
- K(g);CHECK,P-FLIGHT,XP(I)::R(K)+B(F)
- Q(b);SBLOCK,XP(I)::S(A),XS(c)
- B(f);XP(B)::R(E)+S(G)
- S(c);N_GUARD,XP(B)::B(F)
- S(c);N_GUARD::B(F)
- B(f);::R(E)+S(G)
- S(c);N_GUARD::B(F),XS(c)
- Refutation
- P(d);XP(B)
- Try
- B(F);
- Threat
- DUALS(5)
- Vars
- S(c);N_GUARD::B(F)
- S(c);N_GUARD::B(F),XS(c)
- Refutation
- P(d);XP(B)
- Try
- Q(L);CHECK
- Vars
- K(g);CHECK,P-FLIGHT,P_SPINR(e),XS(G)::R(E)+B(F)
- Refutation
- P(i);XQ(L)
- Try
- P(B);CHECK,XB(f)
- Vars
- R(e);XP(B)::S(A),XS(c)
- Refutation
- P(h);XP(B)
- Try
- Actual
- B(F);
- Threat
- B(F),XP(i)
- Vars
- K(g);CHECK,P-FLIGHT::QAR(L)+B(F)
- Q(b);SBLOCK::S(A),XS(c)
- P(i);::B(F)
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