MESON Chess Problem Database
Problem Display
PID: 103889 (2b5/3np3/8/3N2R1/Qpq1k2K/2PN1Rp1/6P1/2rn4 w - - 0 1)
Bogdanov, Evgeny Mikhailovich
5th HM., Hlas l'udu, 1987
(First published on Thu Jul 9 1987)
#2
8 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxd3
- 2.Rf4#
- 1...Qxd5
- 2.Rg4#
- 1...Sb2
- 2.Re3#
- 1...Sf2
- 2.Re3#
- 1...Se3
- 2.Rxe3#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sb6
- 2.Re5#
- 1...Sf6
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...bxc3
- 2.Qxc4#
- 1...b3
- 2.Qxc4#
- 1...Qxd3
- Tries
- 1.Sf2+?
- 1...Sxf2
- 2.Re3#
- 1...gxf2!
- 1...Sxf2
- 1.S5xb4?
- threat
- 2.Rg4#
- 1...Qxd3
- 2.Sxd3#
- 1...Qxb4
- 2.Qc6#
- 2.Qxb4#
- 1...Qe6
- 2.Sd5#
- 1...Qf7
- 2.Sd5#
- 1...Qg8
- 2.Sd5#
- 1...Qc7
- 2.Sc6#
- 1...Se3
- 2.Rf4#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sb6
- 2.Re5#
- 1...Sf6
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sf2!
- threat
- 1.Sf6+?
- 1...Sxf6
- 2.Re5#
- 1...exf6!
- 1...Sxf6
- 1.Qxd1?
- threat
- 2.Re3#
- 2.Rf4#
- 2.Qe2#
- 1...Qxd3
- 2.Rf4#
- 2.Qxd3#
- 1...Qxd5
- 2.Rg4#
- 2.Qe2#
- 1...Qxc3
- 2.Rf4#
- 1...Rxd1
- 2.Re3#
- 1...Rxc3
- 2.Rf4#
- 1...bxc3
- 2.Rf4#
- 1...Se5
- 2.Rxe5#
- 1...Qa2
- 2.Re3#
- 2.Rf4#
- 1...Qd4
- 2.Rf4#
- 1...Qc5
- 2.Rf4#
- 1...Qc7
- 2.Re3#
- 2.Qe2#
- 1...Rc2
- 2.Re3#
- 2.Rf4#
- 1...e5!
- threat
- 1.Qc6?
- threat
- 2.Sf6#
- 2.Rg4#
- 2.Qxc4#
- 2.Qg6#
- 1...Qxd3
- 2.Sf6#
- 2.Rf4#
- 2.Qg6#
- 1...Qxd5
- 2.Rg4#
- 2.Qxd5#
- 1...Qxc3
- 2.Rg4#
- 1...Rxc3
- 2.Rg4#
- 1...Sxc3
- 2.Rg4#
- 2.Qxc4#
- 1...bxc3
- 2.Rg4#
- 2.Qxc4#
- 1...Se3
- 2.Rxe3#
- 1...Qa2
- 2.Sf6#
- 2.Rg4#
- 2.Qg6#
- 1...Qb3
- 2.Sf6#
- 2.Rg4#
- 2.Qg6#
- 1...Qb5
- 2.Sf6#
- 2.Rg4#
- 2.Qg6#
- 1...Qa6
- 2.Sb6#
- 2.Sf6#
- 2.Rg4#
- 1...Qd4
- 2.Sf6#
- 2.Rg4#
- 2.Qg6#
- 1...Qc5
- 2.Sf6#
- 2.Rg4#
- 2.Qg6#
- 1...Ba6
- 2.Sf6#
- 2.Rg4#
- 2.Qg6#
- 1...Sb2
- 2.Sf6#
- 2.Re3#
- 2.Rg4#
- 2.Qg6#
- 1...Sf2
- 2.Sf6#
- 2.Re3#
- 2.Qxc4#
- 2.Qg6#
- 1...Sc5
- 2.Sf6#
- 2.Re5#
- 1...Se5
- 2.Sf6#
- 2.Rxe5#
- 1...Sb6
- 2.Sf6#
- 2.Re5#
- 1...Sf6
- 2.Sxf6#
- 2.Re5#
- 2.Qxc4#
- 1...Sb8
- 2.Sf6#
- 2.Re5#
- 2.Qxc4#
- 1...Sf8
- 2.Sf6#
- 2.Re5#
- 2.Qxc4#
- 1...e5
- 2.Sf6#
- 2.Rg4#
- 2.Qxc4#
- 1...e6
- 2.Sf6#
- 2.Rg4#
- 2.Qxc4#
- 1...Qxc6!
- threat
- 1.Qxd7?
- threat
- 2.Rg4#
- 2.Re5#
- 1...Qxd3
- 2.Rf4#
- 1...Qxd5
- 2.Rg4#
- 2.Qxd5#
- 1...Qxc3
- 2.Rg4#
- 1...Rxc3
- 2.Rg4#
- 1...Bxd7
- 2.Re5#
- 1...Sxc3
- 2.Rg4#
- 1...bxc3
- 2.Rg4#
- 1...Se3
- 2.Rxe3#
- 1...Qd4
- 2.Rg4#
- 1...Sf2
- 2.Re3#
- 2.Re5#
- 1...e5
- 2.Sf6#
- 2.Rg4#
- 2.Rxe5#
- 1...Qc7!
- threat
- 1.Sf2+?
- Keys
- 1.S3xb4!
- threat
- 2.Rf4#
- 1...Qxd5
- 2.Sxd5#
- 1...Qxb4
- 2.Qxb4#
- 1...Qf1
- 2.Sd3#
- 1...Qc7
- 2.Sc6#
- 1...e5
- 2.Rg4#
- threat
- 1.S3xb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 12
- Sets
- Q(e);P_SPINP(d),SBLOCK,XS(C)::R1(D)
- Q(e);P_SPINP(d),SBLOCK,XS(G)::R(H)
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- S(g);N_GUARD::R1(H)
- S(g);N_GUARD::R1(H),XS(g)
- P(d);OGATE,P_SPINQ(e),XP(B)::QAR2(E),XQ(e)
- P(d);OGATE,P_SPINQ(e)::QAR2(E),XQ(e)
- Tries
- Try
- S(C);CHECK
- Vars
- S(b);XS(C)::R1(D)
- Refutation
- P(c);XS(C)
- Try
- S(G);XP(d)
- Threat
- R(H)
- Vars
- Q(e);XS(C)::QAR(E)+S(G),XQ(e)
- Q(e);::QAR(E)+S(G)
- S(b);SBLOCK::R1(D)
- S(g);N_GUARD::R1(H)
- S(g);N_GUARD::R1(H),XS(g)
- Refutation
- S(b);
- Try
- S(G);CHECK
- Vars
- S(g);XS(G)::R1(H)
- Refutation
- P(h);XS(G)
- Try
- Q(E);XS(b)
- Threat
- DUALS(3)
- Vars
- Q(e);XP(B)::R1(D)
- R(a);XQ(E)::R1(D)
- R(a);XP(B)::R1(D)
- P(d);XP(B)::R1(D)
- S(g);N_GUARD::R1(H),XS(g)
- Q(e);::R1(D)
- Refutation
- P(h);
- Try
- Q(E);
- Threat
- DUALS(4)
- Vars
- Q(e);XP(B)::R(H)
- R(a);XP(B)::R(H)
- S(b);N_GUARD::R1(D),XS(b)
- Refutation
- Q(e);XQ(E)
- Try
- Q(E);XS(g)
- Threat
- DUALS(2)
- Vars
- Q(e);SBLOCK,XS(C)::R1(D)
- Q(e);XP(B)::R(H)
- R(a);XP(B)::R(H)
- B(i);XQ(E)::R1(H)
- S(b);XP(B)::R(H)
- P(d);XP(B)::R(H)
- S(b);N_GUARD::R1(D),XS(b)
- Q(e);::R(H)
- Refutation
- Q(e);
- Try
- Actual
- S(C);XP(d)
- Threat
- R1(D)
- Vars
- Q(e);XS(G)::QAR(E)+S(C),XQ(e)
- Q(e);OGATE,P_SPINQ(e),XS(C)::QAR(E),XQ(e)
- Q(e);::QAR(E)+S(C)
- P(h);SBLOCK::R(H)
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