MESON Chess Problem Database
Problem Display
PID: 156000 (8/8/1pN2q2/2Pk1Pp1/BP2R3/3PKNp1/8/7Q w - - 0 1)
Guida, Marco
The Problemist, 2014
#2
10 + 5
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.Se7#
- 1...Qb2
- 2.Se7#
- 1...Qc3
- 2.Se7#
- 1...Qd4+
- 2.Rxd4#
- 1...Qe5
- 2.Rxe5#
- 1...Qe7
- 2.Sxe7#
- 1...Qd8
- 2.Rd4#
- 2.Re5#
- 1...Qh8
- 2.Se7#
- 1...Qxf5
- 2.Se7#
- 1...Qxc6
- 2.Bb3#
- 2.Rd4#
- 2.Re5#
- 1...Qd6
- 2.Rd4#
- 1...Qg6
- 2.Se7#
- 2.Rd4#
- 2.Re5#
- 1...Qh6
- 2.Se7#
- 2.Rd4#
- 2.Re5#
- 1...Qf7
- 2.Rd4#
- 2.Re5#
- 1...Qf8
- 2.Rd4#
- 2.Re5#
- 1...Qa1
- Tries
- 1.Se1?
- threat
- 2.Rd4#
- 2.Re5#
- 1...Qd4+
- 2.Rxd4#
- 1...Qxf5
- 2.Se7#
- 2.Re5#
- 1...Qxc6
- 2.Bb3#
- 1...bxc5
- 2.Rd4#
- 1...Qe5
- 2.Rxe5#
- 1...Qe7
- 2.Sxe7#
- 2.Re5#
- 1...Qe6
- 2.Re5#
- 1...g2!
- threat
- 1.Sg1?
- threat
- 2.Rd4#
- 2.Re5#
- 1...Qd4+
- 2.Rxd4#
- 1...Qxf5
- 2.Se7#
- 2.Re5#
- 1...Qxc6
- 2.Bb3#
- 1...bxc5
- 2.Rd4#
- 1...Qe5
- 2.Rxe5#
- 1...Qe7
- 2.Sxe7#
- 2.Re5#
- 1...Qe6
- 2.Re5#
- 1...g2!
- threat
- 1.Sd2?
- threat
- 2.Rd4#
- 2.Re5#
- 1...Qd4+
- 2.Rxd4#
- 1...Qxf5
- 2.Se7#
- 2.Re5#
- 1...Qxc6
- 2.Bb3#
- 1...bxc5
- 2.Rd4#
- 1...Qe5
- 2.Rxe5#
- 1...Qe7
- 2.Sxe7#
- 2.Re5#
- 1...Qe6
- 2.Re5#
- 1...g2!
- threat
- 1.Sh2?
- threat
- 2.Rd4#
- 2.Re5#
- 1...Qd4+
- 2.Rxd4#
- 1...Qxf5
- 2.Se7#
- 2.Re5#
- 1...Qxc6
- 2.Bb3#
- 1...bxc5
- 2.Rd4#
- 1...Qe5
- 2.Rxe5#
- 1...Qe7
- 2.Sxe7#
- 2.Re5#
- 1...Qe6
- 2.Re5#
- 1...g2!
- threat
- 1.Sfd4?
- threat
- 2.Bb3#
- 2.Re5#
- 1...Qxd4+
- 2.Rxd4#
- 1...Qxc6
- 2.Bb3#
- 2.Bxc6#
- 1...g2
- 2.Bb3#
- 1...Qe5
- 2.Bb3#
- 2.Rxe5#
- 1...bxc5!
- threat
- 1.Sh4?
- threat
- 2.Rd4#
- 2.Re5#
- 1...Qd4+
- 2.Rxd4#
- 1...Qxf5
- 2.Se7#
- 2.Re5#
- 1...Qxc6
- 2.Bb3#
- 1...bxc5
- 2.Rd4#
- 1...Qe5
- 2.Rxe5#
- 1...Qe7
- 2.Sxe7#
- 2.Re5#
- 1...Qe6
- 2.Re5#
- 1...g2!
- threat
- 1.Scd4?
- threat
- 2.Bb3#
- 1...Qxd4+
- 2.Rxd4#
- 1...bxc5!
- threat
- 1.Sce5?
- threat
- 2.Bb3#
- 2.Rd4#
- 1...Qxe5
- 2.Rxe5#
- 1...Qxf5
- 2.Bb3#
- 1...bxc5!
- threat
- 1.Sa7?
- threat
- 2.Bb3#
- 1...Qd4+
- 2.Rxd4#
- 1...Qb2
- 2.Bc6#
- 1...Qc3
- 2.Bc6#
- 1...bxc5!
- threat
- 1.Sb8?
- threat
- 2.Bb3#
- 1...Qd4+
- 2.Rxd4#
- 1...Qb2
- 2.Bc6#
- 1...Qc3
- 2.Bc6#
- 1...bxc5!
- threat
- 1.Sd8?
- threat
- 2.Bb3#
- 1...Qd4+
- 2.Rxd4#
- 1...Qxd8
- 2.Rd4#
- 2.Re5#
- 1...Qb2
- 2.Bc6#
- 1...Qc3
- 2.Bc6#
- 1...bxc5!
- threat
- 1.Qc1?
- threat
- 2.Qc4#
- 1...Qd4+
- 2.Rxd4#
- 1...bxc5
- 2.Qxc5#
- 1...Qc3
- 2.Se7#
- 1...b5!
- threat
- 1.Se1?
- Keys
- 1.Sfe5!
- threat
- 2.Bb3#
- 2.Rd4#
- 1...Qxe5
- 2.Rxe5#
- 1...Qxf5
- 2.Bb3#
- 1...Qxc6
- 2.Bb3#
- 2.Bxc6#
- 1...bxc5
- 2.Rd4#
- threat
- 1.Sfe5!
There are these afters: 156738
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 7
- Sets
- Q(e);N_GUARD::S(J)
- Q(e);N_GUARD,P_PINP(B)::S(J)
- Q(e);CHECK,N_GUARD::R1(G),XQ(e)
- Q(e);N_GUARD,P_PINR(G)::R1(G),XQ(e)
- Q(e);N_GUARD,P_PINR(G)::S(J),XQ(e)
- Q(e);N_GUARD,XP(I)::S(J)
- Q(e);N_GUARD::R1(G)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);SBLOCK,XS(J)::B(E)
- P(d);XP(H)::QAB(A)+R(G),DCHECK
- Q(e);P_PINR(G)::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);P_PINR(G)::QAB(A)+R(G),DCHECK
- Refutation
- P(a);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);SBLOCK,XS(J)::B(E)
- P(d);XP(H)::QAB(A)+R(G),DCHECK
- Q(e);P_PINR(G)::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);P_PINR(G)::QAB(A)+R(G),DCHECK
- Refutation
- P(a);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);SBLOCK,XS(J)::B(E)
- P(d);XP(H)::QAB(A)+R(G),DCHECK
- Q(e);P_PINR(G)::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);P_PINR(G)::QAB(A)+R(G),DCHECK
- Refutation
- P(a);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);SBLOCK,XS(J)::B(E)
- P(d);XP(H)::QAB(A)+R(G),DCHECK
- Q(e);P_PINR(G)::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);P_PINR(G)::QAB(A)+R(G),DCHECK
- Refutation
- P(a);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK,OGATE,XS(D)::QAB(A)+R(G),DCHECK,XQ(e)
- P(a);::B(E)
- Refutation
- P(d);XP(H)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);SBLOCK,XS(J)::B(E)
- P(d);XP(H)::QAB(A)+R(G),DCHECK
- Q(e);P_PINR(G)::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);P_PINR(G)::QAB(A)+R(G),DCHECK
- Refutation
- P(a);
- Try
- S(J);
- Threat
- B(E)
- Vars
- Q(e);CHECK,OGATE,XS(J)::R1(G),XQ(e)
- Refutation
- P(d);XP(H)
- Try
- S(J);
- Threat
- DUALS(2)
- Vars
- Q(e);OGATE,P_PINR(G),XS(J)::R1(G),XQ(e)
- Q(e);XP(I)::B(E)
- Refutation
- P(d);XP(H)
- Try
- S(J);
- Threat
- B(E)
- Vars
- Q(e);CHECK,N_GUARD::R1(G),XQ(e)
- Q(e);N_GUARD::B(E)
- Q(e);N_GUARD,P_PINP(B)::B(E)
- Refutation
- P(d);XP(H)
- Try
- S(J);
- Threat
- B(E)
- Vars
- Q(e);CHECK,N_GUARD::R1(G),XQ(e)
- Q(e);N_GUARD::B(E)
- Q(e);N_GUARD,P_PINP(B)::B(E)
- Refutation
- P(d);XP(H)
- Try
- S(J);
- Threat
- B(E)
- Vars
- Q(e);CHECK,N_GUARD::R1(G),XQ(e)
- Q(e);N_GUARD::B(E)
- Q(e);N_GUARD,P_PINP(B)::B(E)
- Refutation
- P(d);XP(H)
- Try
- Q(A);
- Threat
- QAB1(A)
- Vars
- Q(e);CHECK,N_GUARD::R1(G),XQ(e)
- P(d);OGATE,XP(H)::QAR1(A),XP(d)
- Q(e);N_GUARD,P_PINP(B)::S(J)
- Refutation
- P(d);
- Try
- Actual
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(e);OGATE,P_PINR(G),XS(D)::QAB(A)+R(G),DCHECK,XQ(e)
- Q(e);XP(I)::B(E)
- P(d);XP(H)::QAB(A)+R(G),DCHECK
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