MESON Chess Problem Database
Problem Display
PID: 239916 (2B3q1/1n1NN3/bP6/B1P2P2/r1kbQnR1/PRp5/2P5/5K2 w - - 0 1)
Erokhin, Vladimir Alekseevich
Sinfonie Scacchistiche, 1976
#2
13 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rxa3
- 2.Rb4#
- 1...Rb4
- 2.Rxb4#
- 1...Rxa5
- 2.Rb4#
- 1...Bb5
- 2.Rxc3#
- 1...Se2
- 2.Qd3#
- 2.Qxe2#
- 1...Sg2
- 2.Qd3#
- 2.Qe2#
- 2.Qxd4#
- 1...Sd3
- 2.Qxd3#
- 2.Qxd4#
- 1...Sh3
- 2.Qd3#
- 2.Qe2#
- 2.Qxd4#
- 1...Sd5
- 2.Qd3#
- 2.Qe2#
- 2.Qxd4#
- 1...Sh5
- 2.Qd3#
- 2.Qe2#
- 2.Qxd4#
- 1...Se6
- 2.Qd3#
- 2.Qd5#
- 2.Qe2#
- 1...Sg6
- 2.Qd3#
- 2.Qe2#
- 2.Qxd4#
- 1...Sxa5
- 2.Bxa6#
- 1...Sxc5
- 2.Se5#
- 1...Sd8
- 2.Bxa6#
- 1...Rxa3
- Tries
- 1.Sd5?
- threat
- 2.Se3#
- 1...Sxd5
- 2.Qd3#
- 2.Qe2#
- 2.Qxd4#
- 1...Rb4
- 2.Rxb4#
- 1...Sg2
- 2.Qxd4#
- 1...Qxd5!
- threat
- 1.Sxg8?
- 1...Rxa3
- 2.Rb4#
- 1...Rxa5
- 2.Rb4#
- 1...Sxa5
- 2.Bxa6#
- 1...Sxc5
- 2.Se5#
- 1...Rb4
- 2.Rxb4#
- 1...Bb5
- 2.Rxc3#
- 1...Se2
- 2.Qe6#
- 1...Sg2
- 2.Qxd4#
- 2.Qe6#
- 1...Sd3
- 2.Qxd4#
- 2.Qe6#
- 1...Sh3
- 2.Qxd4#
- 2.Qe6#
- 1...Sd5
- 2.Qd3#
- 2.Qe2#
- 2.Qxd4#
- 1...Sh5
- 2.Qxd4#
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Sg6
- 2.Qxd4#
- 2.Qe6#
- 1...Sd8
- 2.Bxa6#
- 1...Sd6!
- 1...Rxa3
- 1.Rg3?
- threat
- 2.Rgxc3#
- 1...Rb4
- 2.Rxb4#
- 1...Se2
- 2.Qd3#
- 2.Qxe2#
- 1...Sd3
- 2.Qxd3#
- 1...Sd5
- 2.Qd3#
- 2.Qe2#
- 1...Qxg3!
- threat
- 1.Rxg8?
- 1...Rxa3
- 2.Rb4#
- 1...Rxa5
- 2.Rb4#
- 1...Sxa5
- 2.Bxa6#
- 1...Sxc5
- 2.Se5#
- 1...Rb4
- 2.Rxb4#
- 1...Bb5
- 2.Rxc3#
- 1...Se2
- 2.Qd3#
- 2.Qd5#
- 2.Qxe2#
- 2.Qe6#
- 1...Sg2
- 2.Qd3#
- 2.Qd5#
- 2.Qe2#
- 2.Qe6#
- 1...Sd3
- 2.Qxd3#
- 2.Qd5#
- 2.Qe6#
- 1...Sh3
- 2.Qd3#
- 2.Qd5#
- 2.Qe2#
- 2.Qe6#
- 1...Sd5
- 2.Qd3#
- 2.Qxd5#
- 2.Qe2#
- 1...Sh5
- 2.Qd3#
- 2.Qd5#
- 2.Qe2#
- 2.Qe6#
- 1...Se6
- 2.Qd3#
- 2.Qd5#
- 2.Qe2#
- 2.Qxe6#
- 1...Sg6
- 2.Qd3#
- 2.Qd5#
- 2.Qe2#
- 2.Qe6#
- 1...Sd8
- 2.Bxa6#
- 1...Sd6!
- 1...Rxa3
- 1.Qe2+?
- 1...Sd3
- 2.Qxd3#
- 1...Sxe2!
- 1...Sd3
- 1.Sd5?
- Keys
- 1.Qc6!
- threat
- 2.Qxa4#
- 1...Rxa3
- 2.Rb4#
- 1...Rxa5
- 2.Rb4#
- 1...Bxc5
- 2.Rxf4#
- 1...Sxc5
- 2.Bxa6#
- 1...Rb4
- 2.Rxb4#
- 1...Bb5
- 2.Qxb5#
- 1...Sd3
- 2.Rxc3#
- 1...Sd5
- 2.Se5#
- threat
- 1.Qc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- R(b);N_GUARD,XP(C)::R1(D)
- R(b);N_GUARD::R1(D),XR(b)
- R(b);N_GUARD,XB(G)::R1(D)
- B(f);SBLOCK::R1(D),XP(a)
- S(g);OGATE,XB(G)::B(M),XB(f)
- S(g);SBLOCK,XP(H)::S(K)
- S(g);OGATE::B(M),XB(f)
- Tries
- Try
- S(L);
- Threat
- S(L)
- Vars
- R(b);N_GUARD::R1(D),XR(b)
- S(e);::QAR1(E),XB(d)
- Refutation
- Q(h);XS(L)
- Try
- S(L);XQ(h)
- Vars
- R(b);N_GUARD,XP(C)::R1(D)
- R(b);N_GUARD,XB(G)::R1(D)
- S(g);OGATE,XB(G)::B(M),XB(f)
- S(g);SBLOCK,XP(H)::S(K)
- R(b);N_GUARD::R1(D),XR(b)
- B(f);SBLOCK::R1(D),XP(a)
- S(e);N_GUARD::QAB(E)
- S(e);N_GUARD::QAB(E),XS(e)
- S(g);OGATE::B(M),XB(f)
- Refutation
- S(g);
- Try
- R(F);
- Threat
- R1(F),XP(a)
- Vars
- R(b);N_GUARD::R1(D),XR(b)
- S(e);N_GUARD::QAB1(E),XS(e)
- Refutation
- Q(h);XR(F)
- Try
- R(F);XQ(h)
- Vars
- R(b);N_GUARD,XP(C)::R1(D)
- R(b);N_GUARD,XB(G)::R1(D)
- S(g);OGATE,XB(G)::B(M),XB(f)
- S(g);SBLOCK,XP(H)::S(K)
- R(b);N_GUARD::R1(D),XR(b)
- B(f);SBLOCK::R1(D),XP(a)
- S(g);OGATE::B(M),XB(f)
- Refutation
- S(g);
- Try
- Q(E);CHECK,N_PINB(d)
- Vars
- S(e);N_GUARD,P_SPINB(d),P_SPINS(e)::QAB1(E),XS(e)
- Refutation
- S(e);P_SPINB(d),XQ(E)
- Try
- Actual
- Q(E);N_PINB(d)
- Threat
- QAR2(E),XR(b)
- Vars
- R(b);N_GUARD,XP(C)::R1(D)
- R(b);N_GUARD,XB(G)::R1(D)
- B(d);OGATEB,P_SPINB(d),P_SPINS(e),XP(H)::R(F),XS(e)
- S(g);OGATE,P_SPINS(g),XP(H)::B(M),XB(f)
- R(b);N_GUARD::R1(D),XR(b)
- B(f);N_GUARD::QAB1(E),XB(f)
- S(e);P_SPINB(d)::R1(D),XP(a)
- S(e);P_SPINB(d)::S(K)
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