MESON Chess Problem Database
Problem Display
PID: 7678 (8/2p1R3/2Kn1P2/NpP3P1/1PpkBpQN/4p3/1P1n4/5R2 w - - 0 1)
Mochalkin, Oleksandr Viktorovich
3rd Prize, Suomen Shakki, 1992
#2
12 + 8
| 1054 | Troll | 1993 |
| 6113 | Problemschach-Jahrbuch (1993) | 1994 |
SOLUTION
- SOUND
- Sets
- 1...Sb1
- 2.Sf3#
- 1...Sxf1
- 2.Sf3#
- 1...Sb3
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sf5
- 2.Sxf5#
- 1...Sb7
- 2.Sf5#
- 1...Sf7
- 2.Sf5#
- 1...Sc8
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...e2
- 2.Qg1#
- 1...Sb1
- Tries
- 1.Sb3+?
- 1...Sxb3
- 2.Sf3#
- 1...cxb3!
- 1...Sxb3
- 1.Bc2?
- 1...Sxf1
- 2.Sf3#
- 1...Sb1
- 2.Sf3#
- 1...Sb3
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...S2e4
- 2.Sf3#
- 1...S6e4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sb7
- 2.Sf5#
- 1...Sf7
- 2.Sf5#
- 1...Sc8
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...e2
- 2.Qg1#
- 1...c3!
- 1...Sxf1
- 1.Rd1?
- threat
- 2.Sf3#
- 1...e2
- 2.Qg1#
- 1...f3
- 2.Sxf3#
- 1...Sxe4!
- threat
- 1.Rxf4?
- 1...S2xe4
- 2.Qd1#
- 1...S6xe4
- 2.Qd7#
- 1...e2
- 2.Qg1#
- 1...Sb1
- 2.Sf3#
- 1...Sf1
- 2.Sf3#
- 1...Sb3
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sf5
- 2.Sxf5#
- 1...Sb7
- 2.Sf5#
- 1...Sf7
- 2.Sf5#
- 1...Sc8
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...c3!
- 1...S2xe4
- 1.Qd1?
- threat
- 2.Sf3#
- 1...e2
- 2.Qxd2#
- 1...f3
- 2.Sxf3#
- 1...Sxe4!
- threat
- 1.Qe2?
- 1...Sxf1
- 2.Sf3#
- 1...S2xe4
- 2.Sf3#
- 1...S6xe4
- 2.Sf5#
- 1...c3
- 2.Qd3#
- 1...Sb1
- 2.Sf3#
- 1...Sb3
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sf5
- 2.Sxf5#
- 1...Sb7
- 2.Sf5#
- 1...Sf7
- 2.Sf5#
- 1...Sc8
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...f3!
- 1...Sxf1
- 1.Qf5?
- threat
- 2.Qd5#
- 2.Qe5#
- 1...S2xe4
- 2.Qd5#
- 1...S6xe4
- 2.Qd5#
- 1...Sxf5
- 2.Sxf5#
- 1...Sf3
- 2.Sxf3#
- 2.Qd5#
- 1...Sf7
- 2.Qd5#
- 1...e2!
- threat
- 1.Qe6?
- threat
- 2.Qd5#
- 2.Qe5#
- 1...S2xe4
- 2.Qd5#
- 1...S6xe4
- 2.Qd5#
- 1...Sf3
- 2.Sxf3#
- 2.Qd5#
- 1...Sf7
- 2.Sf5#
- 2.Qd5#
- 1...e2!
- threat
- 1.Sb3+?
- Keys
- 1.Qxf4!
- threat
- 2.Qe5#
- 1...S2xe4
- 2.Rd1#
- 1...S6xe4
- 2.Rd7#
- 1...Sf3
- 2.Sxf3#
- 1...Sf7
- 2.Sf5#
- 1...e2
- 2.Qxd2#
- 2.Qf2#
- threat
- 1.Qxf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- S(a);N_GUARD::S(F)
- S(a);N_GUARD,XR(A)::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(g);N_GUARD::S(F),XS(g)
- S(g);N_GUARD::S(F)
- P(b);OGATEB::QAB(E)
- Tries
- Try
- S(G);CHECK
- Vars
- S(a);XS(G)::S(F)
- Refutation
- P(c);XS(G)
- Try
- B(D);P_PINP(e)
- Vars
- S(a);N_GUARD,XR(A)::S(F)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(a);N_GUARD,N_SPINP(e)::S(F)
- S(g);N_GUARD,N_SPINP(e)::S(F)
- S(g);N_GUARD::S(F),XS(g)
- S(g);N_GUARD::S(F)
- P(b);OGATEB::QAB(E)
- Refutation
- P(c);
- Try
- R(A);P_PINS(a)
- Threat
- S(F)
- Vars
- P(b);OGATEB::QAB(E)
- P(e);::S(F),XP(e)
- Refutation
- S(g);XB(D)
- Try
- R(A);XP(e)
- Vars
- S(a);OGATEB,P_SPINS(a),XB(D)::QAR(E)
- S(g);OGATEB,P_SPINS(g),XB(D)::QAR(E)
- P(b);OGATEB::QAB(E)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(g);N_GUARD::S(F),XS(g)
- S(g);N_GUARD::S(F)
- Refutation
- P(c);
- Try
- Q(E);P_PINS(a)
- Threat
- S(F)
- Vars
- P(b);N_GUARD::QAR2(E),XS(a)
- P(e);::S(F),XP(e)
- Refutation
- S(g);XB(D)
- Try
- Q(E);
- Vars
- S(a);N_GUARD,XR(A)::S(F)
- S(a);N_GUARD,XB(D)::S(F)
- S(g);N_GUARD,XB(D)::S(F)
- P(c);N_GUARD::QAR1(E)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(g);N_GUARD::S(F),XS(g)
- S(g);N_GUARD::S(F)
- Refutation
- P(e);
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- S(a);XB(D)::QAR1(E)
- S(g);XB(D)::QAR1(E)
- S(g);XQ(E)::S(F),XS(g)
- S(g);::QAR1(E)
- Refutation
- P(b);
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- S(a);XB(D)::QAR1(E)
- S(g);XB(D)::QAR1(E)
- Refutation
- P(b);
- Try
- Actual
- Q(E);XP(e)
- Threat
- QAB1(E)
- Vars
- S(a);OGATEB,P_SPINS(a),XB(D)::R(A)
- S(g);OGATEB,P_SPINS(g),XB(D)::R(L)
- S(a);N_GUARD::S(F),XS(a)
- S(g);N_GUARD::S(F)
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