MESON Chess Problem Database
Problem Display
PID: 179735 (4R1rq/1p3b1p/rQ2nPPR/2pB1k1N/p7/p4N1P/Kb1B4/8 w - - 0 1)
Kopnin, Aleksey Grigorevich
Usmanov, Rashid R
64 Shakhmatnoe obozrenie, 1987
#2
11 + 12
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxf6
- 2.Sg3#
- 1...Ba1
- 2.Qb1#
- 1...Bc1
- 2.Qb1#
- 1...Bc3
- 2.Qb1#
- 1...Bd4
- 2.Qb1#
- 1...Be5
- 2.Sh4#
- 2.Qb1#
- 1...Bxf6
- 2.Sg3#
- 2.Qb1#
- 1...Sd4
- 2.Sh4#
- 2.Sg3#
- 2.Re5#
- 1...Sf4
- 2.Sg3#
- 1...Sg5
- 2.Sh4#
- 2.Sg3#
- 1...Sc7
- 2.Sh4#
- 2.Sg3#
- 1...Sg7
- 2.Sh4#
- 2.Sg3#
- 1...Sd8
- 2.Sh4#
- 2.Sg3#
- 1...Sf8
- 2.Sh4#
- 2.Sg3#
- 1...Qxf6
- Tries
- 1.Bf4?
- threat
- 2.Sh4#
- 1...Bxf6
- 2.Qb1#
- 1...Sxf4
- 2.Sg3#
- 1...Qxf6!
- threat
- 1.Bc4?
- threat
- 2.Bd3#
- 1...Sd4
- 2.Sh4#
- 2.Sg3#
- 2.Re5#
- 1...Sf4
- 2.Sg3#
- 1...Sg5
- 2.Sh4#
- 2.Sg3#
- 1...Sc7
- 2.Sh4#
- 2.Sg3#
- 1...Sg7
- 2.Sh4#
- 2.Sg3#
- 1...Sd8
- 2.Sh4#
- 2.Sg3#
- 1...Sf8
- 2.Sh4#
- 2.Sg3#
- 1...Ke4!
- threat
- 1.Rxe6?
- threat
- 2.Sh4#
- 2.Sg3#
- 2.Be4#
- 1...Qxf6
- 2.Sg3#
- 2.Be4#
- 1...Rxb6
- 2.Sh4#
- 2.Sg3#
- 1...Rxg6
- 2.Sh4#
- 2.Be4#
- 1...Bxf6
- 2.Sg3#
- 2.Be4#
- 2.Qb1#
- 1...Be5
- 2.Sh4#
- 2.Rxe5#
- 2.Qb1#
- 1...Bxe6!
- threat
- 1.Qc7?
- threat
- 2.Sh4#
- 1...Qxf6
- 2.Sg3#
- 1...Bxf6
- 2.Sg3#
- 1...Sf4
- 2.Qxf4#
- 1...Rd6!
- threat
- 1.Qd8?
- threat
- 2.Sg3#
- 1...Sxd8
- 2.Sh4#
- 1...Be5
- 2.Sh4#
- 1...Rxg6!
- threat
- 1.Qxb2?
- threat
- 2.Sh4#
- 2.Sg3#
- 2.Qe5#
- 2.Qb1#
- 2.Qc2#
- 1...Qxf6
- 2.Sg3#
- 2.Qxf6#
- 2.Qb1#
- 2.Qc2#
- 1...Rxg6
- 2.Sh4#
- 2.Qe5#
- 2.Qb1#
- 2.Qc2#
- 1...Rb6
- 2.Sh4#
- 2.Sg3#
- 2.Qe5#
- 2.Qc2#
- 1...Sd4
- 2.Sh4#
- 2.Re5#
- 1...Sf4
- 2.Sg3#
- 2.Re5#
- 2.Qe5#
- 1...Sg5
- 2.Sh4#
- 2.Sg3#
- 2.Re5#
- 2.Qe5#
- 1...axb2!
- threat
- 1.Qb3?
- threat
- 2.Qc2#
- 2.Qd3#
- 1...Bc3
- 2.Qc2#
- 2.Qb1#
- 1...Sd4
- 2.Sh4#
- 2.Be4#
- 2.Re5#
- 2.Qd3#
- 1...Sf4
- 2.Be4#
- 1...Sg5
- 2.Sh4#
- 1...c4
- 2.Qc2#
- 1...axb3+!
- threat
- 1.Qd6?
- threat
- 2.Sh4#
- 1...Qxf6
- 2.Sg3#
- 1...Bxf6
- 2.Sg3#
- 1...Sf4
- 2.Sg3#
- 2.Qxf4#
- 1...Rxd6!
- threat
- 1.Bf4?
- Keys
- 1.Bg5!
- threat
- 2.Sg3#
- 1...Sxg5
- 2.Sh4#
- 1...Be5
- 2.Qb1#
- threat
- 1.Bg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- Q(l);SBLOCK,XP(H)::S(F)
- B(a);OGATE::QAB(G)
- S(g);P_PINB(E)::S(F)
- Tries
- Try
- B(B);
- Threat
- S(C)
- Vars
- B(a);OGATE,XP(H)::QAB(G)
- S(g);P_PINB(E),SBLOCK,XB(B)::S(F)
- Refutation
- Q(l);XP(H)
- Try
- B(E);
- Threat
- B(E)
- Vars
- S(g);P_PINB(E)::S(F)
- Refutation
- K(e);P_SPINS(g),S_FLIGHT
- Try
- R(K);XS(g)
- Threat
- DUALS(3)
- Refutation
- B(i);P_PINB(E),XR(K)
- Try
- Q(G);
- Threat
- S(C)
- Vars
- Q(l);SBLOCK,XP(H)::S(F)
- B(a);SBLOCK,XP(H)::S(F)
- S(g);N_GUARD,P_PINB(E)::QAR1(G),XS(g)
- Refutation
- R(f);
- Try
- Q(G);
- Threat
- S(F)
- Vars
- S(g);P_PINB(E),XQ(G)::S(C)
- B(a);SBLOCK::S(C)
- Refutation
- R(k);XP(I)
- Try
- Q(G);XB(a)
- Threat
- DUALS(5)
- Refutation
- P(b);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- S(g);::B(E)
- S(g);::S(C)
- P(d);::QAB(G)
- Refutation
- P(c);CHECK,XQ(G)
- Try
- Q(G);
- Threat
- S(C)
- Vars
- Q(l);SBLOCK,XP(H)::S(F)
- B(a);SBLOCK,XP(H)::S(F)
- Refutation
- R(f);XQ(G)
- Try
- Actual
- B(B);
- Threat
- S(F)
- Vars
- S(g);P_PINB(E),SBLOCK,XB(B)::S(C)
- B(a);OGATE::QAB(G)
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