MESON Chess Problem Database
Problem Display
PID: 145104 (5b2/P2P2Pn/6B1/1K2n3/3k3B/2N3RN/1p1P4/1r1Q4 w - - 0 1)
O'Shea, Patrick
The Problemist, 1990
#2
11 + 6
SOLUTION
- SOUND
- Tries
- 1.Sg1?
- threat
- 2.Sge2#
- 1...Sxd7
- 2.Sf3#
- 1...Sd3
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sc4
- 2.Sf3#
- 1...Sg4
- 2.Sf3#
- 1...Sc6
- 2.Sf3#
- 1...Sf7
- 2.Sf3#
- 1...Sxg6!
- threat
- 1.Bf6?
- threat
- 2.Rd3#
- 2.Rg4#
- 2.Qg4#
- 1...Rxd1
- 2.Rd3#
- 2.Rg4#
- 1...Sg5
- 2.Rd3#
- 1...Sxf6!
- threat
- 1.Qe2?
- threat
- 2.Qf2#
- 2.Qe3#
- 2.Qe4#
- 1...Sxg6
- 2.Rd3#
- 2.Qe3#
- 2.Qe4#
- 1...Sxd7
- 2.Rd3#
- 2.Rg4#
- 2.Qe3#
- 2.Qe4#
- 1...Rf1
- 2.Qe3#
- 2.Qe4#
- 1...Sd3
- 2.Rxd3#
- 2.Qe3#
- 2.Qe4#
- 1...Sf3
- 2.Rg4#
- 2.Qe3#
- 2.Qe4#
- 1...Sc4
- 2.Rd3#
- 2.Rg4#
- 2.Qe4#
- 1...Sg4
- 2.Rd3#
- 2.Rxg4#
- 2.Qe4#
- 1...Sc6
- 2.Rd3#
- 2.Rg4#
- 2.Qe3#
- 2.Qe4#
- 1...Sf7
- 2.Rd3#
- 2.Rg4#
- 2.Qe3#
- 2.Qe4#
- 1...Sg5
- 2.Qf2#
- 2.Qe3#
- 1...Sf6
- 2.Qf2#
- 2.Qe3#
- 1...Re1!
- threat
- 1.Qb3?
- threat
- 2.Se2#
- 2.Qd5#
- 1...Sxg6
- 2.Qd5#
- 1...Sxd7
- 2.Qd5#
- 1...Sd3
- 2.Qd5#
- 1...Sf3
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sc6
- 2.Qd5#
- 1...Sf7
- 2.Qd5#
- 1...Re1
- 2.Qd5#
- 1...Sf6
- 2.Se2#
- 1...Sc4!
- threat
- 1.Qf3?
- threat
- 2.Se2#
- 2.Qe4#
- 2.Qd5#
- 2.Qf2#
- 2.Qe3#
- 2.Qf4#
- 1...Sxg6
- 2.Qe4#
- 2.Qd5#
- 2.Qe3#
- 1...Sxd7
- 2.Qe4#
- 2.Qd5#
- 2.Qe3#
- 2.Qf4#
- 1...Sd3
- 2.Qe4#
- 2.Qd5#
- 2.Qe3#
- 1...Sc4
- 2.Qe4#
- 2.Qd5#
- 2.Qf4#
- 1...Sg4
- 2.Qe4#
- 2.Qd5#
- 2.Qf4#
- 1...Sc6
- 2.Qe4#
- 2.Qd5#
- 2.Qe3#
- 2.Qf4#
- 1...Sf7
- 2.Qe4#
- 2.Qd5#
- 2.Qe3#
- 2.Qf4#
- 1...Re1
- 2.Qd5#
- 1...Rf1
- 2.Se2#
- 2.Qe4#
- 2.Qd5#
- 2.Qe3#
- 1...Sg5
- 2.Se2#
- 2.Qd5#
- 2.Qf2#
- 2.Qe3#
- 1...Sf6
- 2.Se2#
- 2.Qf2#
- 2.Qe3#
- 1...Sxf3!
- threat
- 1.Qxb1?
- threat
- 2.Qe4#
- 2.Qg1#
- 1...Sxg6
- 2.Qe4#
- 1...Sxd7
- 2.Qe4#
- 1...Sf3
- 2.Qe4#
- 1...Sc4
- 2.Qe4#
- 1...Sg4
- 2.Qe4#
- 1...Sc6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sg5
- 2.Qg1#
- 1...Sf6
- 2.Qg1#
- 1...Sd3!
- threat
- 1.Qe1?
- threat
- 2.Qf2#
- 2.Qe3#
- 2.Qe4#
- 1...Sxg6
- 2.Qe3#
- 2.Qe4#
- 1...Sxd7
- 2.Rd3#
- 2.Rg4#
- 2.Qe3#
- 2.Qe4#
- 1...Sd3
- 2.Rxd3#
- 2.Qe3#
- 2.Qe4#
- 1...Sf3
- 2.Rg4#
- 2.Qe3#
- 2.Qe4#
- 1...Sc4
- 2.Rd3#
- 2.Rg4#
- 2.Qe4#
- 1...Sg4
- 2.Rd3#
- 2.Rxg4#
- 2.Qe4#
- 1...Sc6
- 2.Rd3#
- 2.Rg4#
- 2.Qe3#
- 2.Qe4#
- 1...Sf7
- 2.Rd3#
- 2.Rg4#
- 2.Qe3#
- 2.Qe4#
- 1...Sg5
- 2.Qf2#
- 2.Qe3#
- 1...Sf6
- 2.Qf2#
- 2.Qe3#
- 1...Rxe1!
- threat
- 1.a8Q?
- threat
- 2.Se2#
- 2.Qe4#
- 2.Qd5#
- 1...Sxg6
- 2.Qe4#
- 2.Qd5#
- 1...Sxd7
- 2.Qe4#
- 2.Qd5#
- 1...Sd3
- 2.Qe4#
- 2.Qd5#
- 1...Sf3
- 2.Qe4#
- 2.Qd5#
- 1...Sc4
- 2.Qe4#
- 2.Qd5#
- 1...Sg4
- 2.Qe4#
- 2.Qd5#
- 1...Sf7
- 2.Qe4#
- 2.Qd5#
- 1...Sg5
- 2.Se2#
- 2.Qd5#
- 1...Sf6
- 2.Se2#
- 1...Sc6!
- threat
- 1.d8Q+?
- 1...Bd6
- 2.Qxd6#
- 1...Sd7!
- 1...Bd6
- 1.d8S?
- threat
- 2.Se6#
- 1...Sxg6
- 2.Sc6#
- 1...Sd3
- 2.Sc6#
- 1...Sf3
- 2.Sc6#
- 1...Sc4
- 2.Sc6#
- 1...Sg4
- 2.Sc6#
- 1...Sc6
- 2.Sxc6#
- 1...Sd7
- 2.Sc6#
- 1...Sf7
- 2.Sc6#
- 1...Sg5!
- threat
- 1.d8R+?
- 1...Bd6
- 2.Rxd6#
- 1...Sd7!
- 1...Bd6
- 1.gxf8Q?
- threat
- 2.Qc5#
- 2.Qd6#
- 2.Qf2#
- 2.Qf4#
- 1...Sxg6
- 2.Qc5#
- 2.Qd6#
- 1...Sxd7
- 2.Qd6#
- 2.Qf4#
- 1...Sd3
- 2.Qd6#
- 1...Sf3
- 2.Qc5#
- 2.Qd6#
- 2.Qf4#
- 1...Sc4
- 2.Qc5#
- 2.Qf4#
- 1...Sg4
- 2.Qc5#
- 2.Qd6#
- 2.Qf4#
- 1...Sc6
- 2.Qc5#
- 2.Qd6#
- 2.Qf4#
- 1...Sf7
- 2.Qc5#
- 1...Sg5
- 2.Qc5#
- 2.Qd6#
- 2.Qf2#
- 1...Sf6
- 2.Qc5#
- 1...Sxf8!
- threat
- 1.g8Q?
- threat
- 2.Se2#
- 2.Qd5#
- 1...Sxg6
- 2.Qd5#
- 1...Sxd7
- 2.Qd5#
- 1...Sd3
- 2.Qd5#
- 1...Sf3
- 2.Qd5#
- 1...Sc4
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sc6
- 2.Qd5#
- 1...Sf6
- 2.Se2#
- 1...Sf7!
- threat
- 1.Sg1?
- Keys
- 1.Rg5!
- threat
- 2.Bf2#
- 1...Sxg6
- 2.Rd5#
- 1...Sd3
- 2.Se2#
- 2.Rd5#
- 1...Sc4
- 2.Se2#
- 2.Rd5#
- 2.Qg4#
- 1...Sg4
- 2.Se2#
- 2.Rd5#
- 2.Qxg4#
- threat
- 1.Rg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Tries
- Try
- S(E);
- Threat
- S(E)
- Vars
- S(d);N_GUARD,XP(J)::S(E)
- S(d);N_GUARD::S(E)
- S(d);N_GUARD::S(E),XS(d)
- Refutation
- S(d);XB(H)
- Try
- B(F);P_PINS(d)
- Threat
- DUALS(3)
- Vars
- S(e);::R1(D)
- Refutation
- S(e);N_SPINS(d),XB(F)
- Try
- Q(A);
- Threat
- DUALS(3)
- Refutation
- R(a);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(d);XB(H)::QAR1(A)
- S(d);XP(J)::QAR1(A)
- S(d);::QAR1(A)
- R(a);::QAR1(A)
- S(e);::S(C)
- Refutation
- S(d);
- Try
- Q(A);
- Threat
- DUALS(6)
- Vars
- R(a);::QAR1(A)
- Refutation
- S(d);XQ(A)
- Try
- Q(A);XR(a)
- Threat
- DUALS(2)
- Vars
- S(d);XB(H)::QAR1(A)
- S(d);XP(J)::QAR1(A)
- S(d);::QAR1(A)
- S(e);::QAB(A)
- Refutation
- S(d);
- Try
- Q(A);
- Threat
- DUALS(3)
- Refutation
- R(a);XQ(A)
- Try
- P(I);
- Threat
- DUALS(3)
- Vars
- S(e);::S(C)
- Refutation
- S(d);
- Try
- P(J);CHECK
- Vars
- B(f);N_GUARD,P_SPINB(f)::QAR2(J),XB(f)
- Refutation
- S(d);P_SPINS(d)
- Try
- P(J);
- Threat
- S(J)
- Vars
- S(d);N_GUARD,XB(H)::S(J)
- S(d);N_GUARD::S(J)
- S(d);N_GUARD::S(J),XS(d)
- Refutation
- S(e);
- Try
- P(J);CHECK
- Vars
- B(f);N_GUARD,P_SPINB(f)::R(J),XB(f)
- Refutation
- S(d);P_SPINS(d)
- Try
- P(K);XB(f)
- Threat
- DUALS(4)
- Vars
- S(d);::QAR2(K)
- S(d);::QAB1(K)
- S(e);::QAB1(K)
- Refutation
- S(e);XQ(K)
- Try
- P(K);
- Threat
- DUALS(2)
- Vars
- S(d);XB(H)::QAR1(K)
- S(d);XP(J)::QAR1(K)
- S(d);::QAR1(K)
- S(e);::S(C)
- Refutation
- S(d);
- Try
- Actual
- R(D);
- Threat
- B(F)
- Vars
- S(d);OGATE,XB(H)::R1(D)
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