MESON Chess Problem Database
Problem Display
PID: 85558 (r2R4/5r2/1q1b2Qp/4kN2/n1Pp4/1b1R1BP1/3N1Kn1/B7 w - - 0 1)
Petrov, Evgeny Aleksandrovich
Canadian Chess Chat, 1981
#2
10 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qa5
- 2.Bxd4#
- 1...Qc7
- 2.Bxd4#
- 1...Qxd8
- 2.Bxd4#
- 1...Qb4
- 2.Bxd4#
- 1...Qb5
- 2.Bxd4#
- 1...Qa6
- 2.Bxd4#
- 1...Qc6
- 2.Bxd4#
- 1...Qb7
- 2.Bxd4#
- 1...Qb8
- 2.Bxd4#
- 1...Bxc4
- 2.Sxc4#
- 1...Ba3
- 2.Rd5#
- 1...Bb4
- 2.Rd5#
- 1...Bc5
- 2.Rd5#
- 1...Bc7
- 2.Rd5#
- 1...Be7
- 2.Rd5#
- 1...Bb8
- 2.Rd5#
- 1...Bf8
- 2.Rd5#
- 1...Se1
- 2.Re3#
- 1...Se3
- 2.Rxe3#
- 1...Sf4
- 2.Re3#
- 1...Sh4
- 2.Re3#
- 1...Sc5
- 2.Bxd4#
- 1...Qa5
- Tries
- 1.Sxh6?
- threat
- 2.Sg4#
- 2.Sxf7#
- 1...Rxf3+
- 2.Sxf3#
- 1...Bxc4
- 2.Sxc4#
- 2.Sg4#
- 1...Rf6
- 2.Qe4#
- 1...Qa7
- 2.Sg4#
- 2.Qxd6#
- 1...Qc7
- 2.Sg4#
- 2.Bxd4#
- 1...Qb7
- 2.Sg4#
- 2.Bxd4#
- 2.Qxd6#
- 1...Rf5
- 2.Sg4#
- 2.Qxf5#
- 1...Rfa7
- 2.Sg4#
- 2.Qf5#
- 1...Rb7
- 2.Sg4#
- 2.Qf5#
- 1...Rc7
- 2.Sg4#
- 2.Qf5#
- 1...Rd7
- 2.Sg4#
- 2.Qf5#
- 1...Re7
- 2.Sg4#
- 2.Qf5#
- 1...Rg7
- 2.Sg4#
- 2.Qf5#
- 1...Rh7
- 2.Sg4#
- 2.Qf5#
- 1...Rf8
- 2.Sg4#
- 1...Raa7
- 2.Sg4#
- 1...Se3
- 2.Sxf7#
- 2.Rxe3#
- 1...Rf4!
- threat
- 1.Sg7?
- threat
- 2.Qe6#
- 1...Rxf3+
- 2.Sxf3#
- 1...Bxc4
- 2.Sxc4#
- 1...Rf6
- 2.Qe4#
- 1...Re7
- 2.Qf5#
- 1...Ba3
- 2.Rd5#
- 1...Bb4
- 2.Rd5#
- 1...Bc5
- 2.Rd5#
- 1...Bc7
- 2.Rd5#
- 1...Be7
- 2.Rd5#
- 1...Bb8
- 2.Rd5#
- 1...Bf8
- 2.Rd5#
- 1...Sf4
- 2.Re3#
- 1...Sc5
- 2.Bxd4#
- 1...Rxg7!
- threat
- 1.Bd5?
- threat
- 2.Sf3#
- 2.Qe6#
- 1...Bxc4
- 2.Qe6#
- 1...Rf6
- 2.Sf3#
- 1...Re7
- 2.Sf3#
- 1...Bd1
- 2.Qe6#
- 1...Ba3
- 2.Sf3#
- 1...Bb4
- 2.Sf3#
- 1...Bc5
- 2.Sf3#
- 1...Bc7
- 2.Sf3#
- 1...Be7
- 2.Sf3#
- 1...Bb8
- 2.Sf3#
- 1...Bf8
- 2.Sf3#
- 1...Se1
- 2.Re3#
- 2.Qe6#
- 1...Sf4
- 2.Sf3#
- 2.Re3#
- 1...Sh4
- 2.Re3#
- 2.Qe6#
- 1...Sc5
- 2.Sf3#
- 2.Bxd4#
- 1...Rxf5+!
- threat
- 1.Rxd6?
- threat
- 2.Rd5#
- 2.Qe6#
- 1...Bxc4
- 2.Sxc4#
- 1...Qa5
- 2.Bxd4#
- 2.Re6#
- 2.Qe6#
- 1...Qc5
- 2.Re6#
- 2.Qe6#
- 1...Qd8
- 2.Bxd4#
- 2.Re6#
- 2.Qe6#
- 1...Qb5
- 2.Bxd4#
- 2.Re6#
- 2.Qe6#
- 1...Qc6
- 2.Bxd4#
- 2.Qe6#
- 1...Qb7
- 2.Bxd4#
- 2.Re6#
- 2.Qe6#
- 1...Rf6
- 2.Qxf6#
- 1...Rd7
- 2.Qe6#
- 2.Qf6#
- 1...Re7
- 2.Rd5#
- 2.Qf6#
- 1...Ra5
- 2.Qe6#
- 1...Rd8
- 2.Qe6#
- 1...Re8
- 2.Rd5#
- 1...Se3
- 2.Rxe3#
- 2.Qe6#
- 1...Sf4
- 2.Re3#
- 1...Sc3
- 2.Qe6#
- 1...Sc5
- 2.Bxd4#
- 2.Rd5#
- 1...Qxd6!
- threat
- 1.Sxh6?
- Keys
- 1.Sxd4!
- threat
- 2.Qe6#
- 1...Qxd4+
- 2.Bxd4#
- 1...Rxf3+
- 2.Sxf3#
- 1...Bxc4
- 2.Sxc4#
- 1...Rf6
- 2.Qe4#
- 1...Re7
- 2.Qf5#
- 1...Ba3
- 2.Rd5#
- 1...Bb4
- 2.Rd5#
- 1...Bc5
- 2.Rd5#
- 1...Bc7
- 2.Rd5#
- 1...Be7
- 2.Rd5#
- 1...Bb8
- 2.Rd5#
- 1...Bf8
- 2.Rd5#
- 1...Sf4
- 2.Re3#
- 1...Sc5
- 2.Sc6#
- threat
- 1.Sxd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 12
- Sets
- Q(f);N_GUARD::B(A),XP(d)
- Q(f);N_GUARD,XR(J)::B(A),XP(d)
- B(b);XP(G)::S(B),XB(b)
- B(g);OGATE::R1(J)
- S(a);N_GUARD::R(D)
- S(a);N_GUARD::R(D),XS(a)
- S(c);S_CUTQ(f)::B(A),XP(d)
- Tries
- Try
- S(H);P_SPINB(E),XP(h)
- Threat
- DUALS(2)
- Vars
- R(i);CHECK,XB(E)::S(B),XR(i)
- R(i);SBLOCK::QAR1(I)
- R(i);::S(H)
- R(j);::S(H)
- Refutation
- R(i);
- Try
- S(H);P_SPINB(E)
- Threat
- QAR1(I)
- Vars
- R(i);CHECK,XB(E)::S(B),XR(i)
- B(b);XP(G)::S(B),XB(b)
- R(i);SBLOCK::QAR1(I)
- R(i);N_GUARD,N_PINB(E)::QAR1(I)
- B(g);OGATE::R1(J)
- S(a);N_GUARD,N_PINB(E)::R(D)
- S(c);S_CUTQ(f)::B(A),XP(d)
- Refutation
- R(i);N_PINB(E),XS(H)
- Try
- B(E);P_SPINS(H)
- Threat
- DUALS(2)
- Vars
- B(b);XP(G)::QAR1(I)
- R(i);::S(B)
- R(i);N_PINS(H)::S(B)
- B(b);::QAR1(I)
- B(g);::S(B)
- Refutation
- R(i);CHECK,XS(H)
- Try
- R(J);XB(g)
- Threat
- DUALS(2)
- Vars
- B(b);XP(G)::S(B),XB(b)
- R(i);N_GUARD::QAB1(I),XR(i)
- R(j);::QAR1(I)
- R(j);::R1(J)
- S(a);N_GUARD::R(D)
- S(c);N_SPINP(d)::QAR1(I)
- Refutation
- Q(f);XR(J)
- Try
- Actual
- S(H);P_SPINB(E),P_SPINS(H),XP(d)
- Threat
- QAR1(I)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XS(H)::B(A),XQ(f)
- R(i);CHECK,XB(E)::S(B),XR(i)
- B(b);XP(G)::S(B),XB(b)
- R(i);SBLOCK::QAR1(I)
- R(i);N_GUARD,N_PINB(E)::QAR1(I)
- B(g);OGATE::R1(J)
- S(a);N_GUARD,N_PINB(E)::R(D)
- S(c);N_PINS(H)::B(A)+S(H),DCHECK
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