MESON Chess Problem Database
Problem Display
PID: 145248 (5br1/2RnBBp1/NP3PP1/qPrN1p1p/p1kp1K2/2PpP3/R2P4/1Q6 w - - 0 1)
O'Shea, Patrick
The Problemist, 1996
#2
15 + 12
SOLUTION
- SOUND
- Sets
- 1...Qxc3
- 2.Sxc3#
- 1...Qb4
- 2.Qxb4#
- 1...Qxb6
- 2.Sxb6#
- 2.Rxa4#
- 2.Qb4#
- 1...Qxb5
- 2.Sdb4#
- 1...Qxa6
- 2.Qb4#
- 1...Rxc7
- 2.Sdxc7#
- 1...Bxe7
- 2.Sxe7#
- 1...Se5
- 2.Rxc5#
- 1...Sxb6
- 2.Sxb6#
- 2.Rxc5#
- 1...Sxf6
- 2.Sxf6#
- 2.Rxc5#
- 1...Sb8
- 2.Rxc5#
- 1...dxc3
- 2.Sxc3#
- 1...dxe3
- 2.Sxe3#
- 1...gxf6
- 2.Sxf6#
- 1...Qxc3
- Tries
- 1.Kf3?
- threat
- 2.Sf4#
- 1...Qxb6
- 2.Sxb6#
- 2.Rxa4#
- 2.Qb4#
- 1...Sxb6
- 2.Sxb6#
- 2.Rxc5#
- 1...Sxf6
- 2.Sxf6#
- 2.Rxc5#
- 1...Qb4
- 2.Qxb4#
- 1...f4
- 2.Sxf4#
- 1...Se5+!
- threat
- 1.Kg3?
- threat
- 2.Sf4#
- 1...f4+
- 2.Sxf4#
- 1...Qxb6
- 2.Sxb6#
- 2.Rxa4#
- 2.Qb4#
- 1...Sxb6
- 2.Sxb6#
- 2.Rxc5#
- 1...Sxf6
- 2.Sxf6#
- 2.Rxc5#
- 1...Qb4
- 2.Qxb4#
- 1...Se5
- 2.Rxc5#
- 1...h4+!
- threat
- 1.Kg5?
- threat
- 2.Sf4#
- 1...gxf6+
- 2.Sxf6#
- 1...Qxb6
- 2.Sxb6#
- 2.Rxa4#
- 2.Qb4#
- 1...Sxb6
- 2.Sxb6#
- 2.Rxc5#
- 1...Sxf6
- 2.Sxf6#
- 2.Rxc5#
- 1...Qb4
- 2.Qxb4#
- 1...Se5
- 2.Rxc5#
- 1...f4!
- threat
- 1.Sxc5?
- threat
- 2.Sxd7#
- 2.Qxd3#
- 1...Qxc3
- 2.Sxd7#
- 2.Sxc3#
- 1...Qxb6
- 2.Sxb6#
- 2.Rxa4#
- 2.Qxd3#
- 2.Qb4#
- 1...Qxb5
- 2.Sb4#
- 2.Qxd3#
- 1...Bxe7
- 2.Sxe7#
- 2.Qxd3#
- 1...Sxc5
- 2.Rxc5#
- 1...Sxb6
- 2.Sxd3#
- 2.Sxa4#
- 2.Se4#
- 2.Sa6#
- 2.Sb7#
- 2.Sd7#
- 2.Sxb6#
- 2.Qxd3#
- 1...Sxf6
- 2.Sxd3#
- 2.Sxa4#
- 2.Se4#
- 2.Sa6#
- 2.Sb7#
- 2.Sd7#
- 2.Sxf6#
- 2.Qxd3#
- 1...Qb4
- 2.Qxd3#
- 2.Qxb4#
- 1...Qa7
- 2.Qxd3#
- 2.Qb4#
- 1...Qa8
- 2.Qxd3#
- 2.Qb4#
- 1...Sb8
- 2.Qxd3#
- 1...Se5!
- threat
- 1.Bd6?
- threat
- 2.Se7#
- 1...Sxb6
- 2.Sxb6#
- 2.Rxc5#
- 1...Sxf6
- 2.Sxf6#
- 2.Rxc5#
- 1...Qb4
- 2.Qxb4#
- 1...Se5
- 2.Rxc5#
- 1...Be7
- 2.Sxe7#
- 1...Bxd6+!
- threat
- 1.Bxf8?
- threat
- 2.Se7#
- 1...Qxb6
- 2.Sxb6#
- 2.Rxa4#
- 2.Qb4#
- 1...Sxb6
- 2.Sxb6#
- 2.Rxc5#
- 1...Sxf6
- 2.Sxf6#
- 2.Rxc5#
- 1...Sxf8
- 2.Rxc5#
- 1...Qb4
- 2.Qxb4#
- 1...Se5
- 2.Rxc5#
- 1...Rxf8!
- threat
- 1.Rxa4+?
- 1...Qb4
- 2.Rxb4#
- 2.Qxb4#
- 1...Qxa4!
- 1...Qb4
- 1.Rc6?
- threat
- 2.Sdc7#
- 1...Sxb6
- 2.Sxb6#
- 2.Rxc5#
- 1...Sxf6
- 2.Sxf6#
- 2.Rxc5#
- 1...Se5
- 2.Rxc5#
- 1...Rxc6!
- threat
- 1.cxd4?
- threat
- 2.Sc3#
- 1...Qxb6
- 2.Sxb6#
- 2.Rxa4#
- 2.Qb4#
- 1...Sxb6
- 2.Sxb6#
- 2.Rxc5#
- 1...Sxf6
- 2.Sxf6#
- 2.Rxc5#
- 1...Qc3
- 2.Sxc3#
- 1...Se5
- 2.Rxc5#
- 1...Qxd2!
- threat
- 1.exd4?
- threat
- 2.Se3#
- 1...Qb4
- 2.Qxb4#
- 1...Qxc3!
- threat
- 1.e4?
- threat
- 2.Se3#
- 1...Qb4
- 2.Qxb4#
- 1...dxc3!
- threat
- 1.b7?
- threat
- 2.Sb6#
- 1...Qb4
- 2.Qxb4#
- 1...Qb6
- 2.Sxb6#
- 2.Rxa4#
- 2.Qb4#
- 1...Sb6
- 2.Sxb6#
- 2.Rxc5#
- 1...Qxc7+!
- threat
- 1.fxg7?
- threat
- 2.Sf6#
- 1...Qxb6
- 2.Sxb6#
- 2.Rxa4#
- 2.Qb4#
- 1...Sxb6
- 2.Sxb6#
- 2.Rxc5#
- 1...Qb4
- 2.Qxb4#
- 1...Se5
- 2.Rxc5#
- 1...Sf6
- 2.Sxf6#
- 2.Rxc5#
- 1...Rxg7!
- threat
- 1.Kf3?
- Keys
- 1.Rb2!
- threat
- 2.Qa2#
- 1...Qxc3
- 2.Sxc3#
- 1...Qxb5
- 2.Sdb4#
- 1...Qb4
- 2.Rxb4#
- threat
- 1.Rb2!
This is after
After B. Lindgren.
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 8
- Sets
- Q(e);XP(D)::B(O)+S(H),XQ(e)
- Q(e);N_GUARD::QAR1(A),XQ(e)
- Q(e);SBLOCK,XP(G)::B(O)+S(H)
- Q(e);N_GUARD,XS(I)::QAR1(A)
- R(f);N_SPINR(f),XR(M)::B(O)+S(H),XR(f)
- B(k);XB(N)::B(O)+S(H),XB(k)
- S(i);N_GUARD::R1(M),XR(f)
- P(d);XP(D)::B(O)+S(H),XP(d)
- P(d);XP(E)::B(O)+S(H),DCHECK,XP(d)
- P(j);XP(K)::B(O)+S(H),XP(j)
- Tries
- Try
- K(F);P-FLIGHT
- Threat
- B(O)+S(H)
- Vars
- Q(e);N_GUARD::QAR1(A),XQ(e)
- P(g);::B(O)+S(H),XP(g)
- Refutation
- S(i);CHECK
- Try
- K(F);S_FLIGHT
- Threat
- B(O)+S(H)
- Vars
- P(g);CHECK::B(O)+S(H),XP(g)
- Q(e);N_GUARD::QAR1(A),XQ(e)
- S(i);N_GUARD::R1(M),XR(f)
- Refutation
- P(h);CHECK
- Try
- K(F);S_FLIGHT
- Threat
- B(O)+S(H)
- Vars
- P(j);CHECK,P_PINP(L),XP(K)::B(O)+S(H),XP(j)
- Q(e);N_GUARD::QAR1(A),XQ(e)
- S(i);N_GUARD::R1(M),XR(f)
- Refutation
- P(g);P_PINS(H)
- Try
- S(I);XR(f)
- Threat
- DUALS(2)
- Vars
- S(i);OGATE,P_SPINS(i),XS(I)::R1(M),XS(i)
- S(i);::QAB1(A),XP(a)
- Refutation
- S(i);
- Try
- B(N);
- Threat
- B(O)+S(H)
- Vars
- Q(e);N_GUARD::QAR1(A),XQ(e)
- S(i);N_GUARD::R1(M),XR(f)
- B(k);::B(O)+S(H),XB(k)
- Refutation
- B(k);CHECK,XB(N)
- Try
- B(N);XB(k)
- Threat
- B(O)+S(H)
- Vars
- S(i);N_GUARD,XB(N)::R1(M),XR(f)
- Q(e);N_GUARD::QAR1(A),XQ(e)
- S(i);N_GUARD::R1(M),XR(f)
- Refutation
- R(l);XB(N)
- Try
- R(B);CHECK,XP(b)
- Refutation
- Q(e);XR(B)
- Try
- R(M);
- Threat
- B(O)+S(H)
- Vars
- S(i);N_GUARD::R1(M),XR(f)
- Refutation
- R(f);N_SPINR(f),XR(M)
- Try
- P(D);XP(d)
- Threat
- B(O)+S(H)
- Vars
- Q(e);::B(O)+S(H),XQ(e)
- S(i);N_GUARD::R1(M),XR(f)
- Refutation
- Q(e);P_PINP(E),XP(C)
- Try
- P(E);XP(d)
- Threat
- B(O)+S(H),DCHECK
- Vars
- Q(e);N_GUARD::QAR1(A),XQ(e)
- Refutation
- Q(e);XP(D)
- Try
- P(E);
- Threat
- B(O)+S(H),DCHECK
- Vars
- Q(e);N_GUARD::QAR1(A),XQ(e)
- Refutation
- P(d);XP(D)
- Try
- P(J);
- Threat
- B(O)+S(H),DCHECK
- Vars
- Q(e);N_GUARD::QAR1(A),XQ(e)
- Refutation
- Q(e);CHECK,N_SPINR(f),XR(M)
- Try
- P(K);XP(j)
- Threat
- B(O)+S(H)
- Vars
- Q(e);N_GUARD::QAR1(A),XQ(e)
- S(i);N_GUARD::R1(M),XR(f)
- Refutation
- R(l);XP(K)
- Try
- Actual
- R(B);
- Threat
- QAB(A)
- Vars
- Q(e);XP(D)::B(O)+S(H),XQ(e)
- Q(e);SBLOCK,XP(G)::B(O)+S(H)
- Q(e);N_GUARD::R1(B),XQ(e)
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