MESON Chess Problem Database
Problem Display
PID: 9546 (1B6/P3N3/1p1qN1pK/1b2kPP1/8/5P2/4nQn1/8 w - - 0 1)
Colpa, Johannes J
HM., Ystad Allehanda, 1905
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Qc7
- 2.Bxc7#
- 1...Qxb8
- 2.axb8Q#
- 2.axb8B#
- 1...Sc1
- 2.Qd4#
- 2.Qb2#
- 1...Sg1
- 2.Qd4#
- 2.Qb2#
- 1...Sc3
- 2.Qd4#
- 1...Sg3
- 2.Qd4#
- 2.Qb2#
- 1...Sd4
- 2.Qxd4#
- 1...Sef4
- 2.Qd4#
- 2.Qb2#
- 1...Se1
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sgf4
- 2.Qe3#
- 1...Sh4
- 2.Qe3#
- 1...Qc7
- Tries
- 1.Sxg6+?
- 1...Kxf5
- 2.Sg7#
- 1...Kd5!
- 1...Kxf5
- 1.Qxb6?
- threat
- 2.Bxd6#
- 2.Qc5#
- 2.Qxb5#
- 2.Qxd6#
- 1...Qxb8
- 2.Qc5#
- 2.Qxb8#
- 2.axb8Q#
- 2.axb8B#
- 1...gxf5
- 2.Qxd6#
- 1...Bd3
- 2.Bxd6#
- 2.Qc5#
- 2.Qxd6#
- 1...Qc7
- 2.Bxc7#
- 2.Qc5#
- 2.Qxc7#
- 1...Ba4
- 2.Bxd6#
- 2.Qc5#
- 2.Qxd6#
- 1...Bc4
- 2.Bxd6#
- 2.Qxd6#
- 1...Ba6
- 2.Bxd6#
- 2.Qc5#
- 2.Qxd6#
- 1...Bd7
- 2.Bxd6#
- 2.Qc5#
- 2.Qxd6#
- 1...Be8
- 2.Bxd6#
- 2.Qc5#
- 2.Qxd6#
- 1...Sc3
- 2.Bxd6#
- 2.Qd4#
- 2.Qxd6#
- 1...Sd4
- 2.Bxd6#
- 2.Qxd4#
- 2.Qc5#
- 2.Qxd6#
- 1...Sef4
- 2.Bxd6#
- 2.Qd4#
- 2.Qxd6#
- 1...Se3
- 2.Bxd6#
- 2.Qxe3#
- 2.Qxd6#
- 1...Sgf4
- 2.Bxd6#
- 2.Qe3#
- 2.Qxd6#
- 1...Bc6!
- threat
- 1.Qxe2+?
- 1...Se3
- 2.Qb2#
- 2.Qh2#
- 2.Qxe3#
- 1...Bxe2!
- 1...Se3
- 1.f4+?
- 1...Sexf4
- 2.Qd4#
- 1...Sgxf4
- 2.Qe3#
- 1...Ke4!
- 1...Sexf4
- 1.a8Q?
- threat
- 2.Qe4#
- 2.Qd5#
- 1...Qxb8
- 2.Qd5#
- 2.Qxb8#
- 1...gxf5
- 2.Qd5#
- 1...Qc7
- 2.Bxc7#
- 2.Qd5#
- 1...Bd3
- 2.Qd5#
- 1...Bc4
- 2.Qe4#
- 1...Sc3
- 2.Qd4#
- 1...Sg3
- 2.Qd4#
- 2.Qd5#
- 2.Qb2#
- 2.Qa1#
- 1...Sef4
- 2.Qd4#
- 2.Qe4#
- 2.Qb2#
- 2.Qa1#
- 1...Se3
- 2.Qxe3#
- 2.Qe4#
- 1...Sgf4
- 2.Qe3#
- 2.Qe4#
- 1...Bc6!
- threat
- 1.Sxg6+?
- Keys
- 1.Sf4!
- threat
- 2.Sfxg6#
- 1...gxf5+
- 2.Seg6#
- 1...Kxf4
- 2.Bxd6#
- 1...Qxb8
- 2.axb8Q#
- 2.axb8B#
- 1...Sexf4
- 2.Qb2#
- 1...Sgxf4
- 2.Qe3#
- 1...Qc7
- 2.Bxc7#
- 1...Se3
- 2.Qxe3#
- 1...Be8
- 2.Sd3#
- 1...Sh4
- 2.Qe3#
- threat
- 1.Sf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 3
- Sets
- Q(f);OGATEB::B(I),XQ(f)
- Q(f);N_SPINQ(f),OGATE,XB(I)::PXQ(f)=Q
- S(a);N_GUARD::QAB1(A)
- S(a);N_GUARD::QAB1(A),XS(a)
- S(b);N_GUARD::QAR2(A)
- S(b);N_GUARD::QAR2(A),XS(b)
- Tries
- Try
- S(H);CHECK,XP(g)
- Vars
- K(d);N_SPINQ(f),P-FLIGHT,XP(C)::S(E)
- Refutation
- K(d);N_SPINQ(f),P-FLIGHT
- Try
- Q(A);XP(e)
- Threat
- DUALS(4)
- Vars
- P(g);P_PINS(E),XP(C)::QAB1(A),XQ(f)
- Refutation
- B(c);
- Try
- Q(A);CHECK,XS(a)
- Refutation
- B(c);XQ(A)
- Try
- P(B);CHECK
- Vars
- S(a);XP(B)::QAB1(A)
- S(b);XP(B)::QAR2(A)
- Refutation
- K(d);N_SPINQ(f),P-FLIGHT
- Try
- P(G);
- Threat
- DUALS(2)
- Vars
- P(g);P_PINS(E),XP(C)::QAR1(G)
- B(c);::QAR1(G)
- S(a);N_GUARD::QAB1(A)
- Refutation
- B(c);
- Try
- Actual
- S(E);
- Threat
- S(E),XP(g)
- Vars
- P(g);CHECK,SBLOCK,XP(C)::S(H)
- K(d);S_FLIGHT,XS(E)::B(I),XQ(f)
- Q(f);N_SPINQ(f),OGATE,XB(I)::PXQ(f)=Q
- S(a);OGATE,SBLOCK,XS(E)::QAB(A)
- S(b);N_GUARD,XS(E)::QAR2(A)
- Q(f);OGATEB::B(I),XQ(f)
- S(b);N_GUARD::QAR2(A),XS(b)
- B(c);N_GUARD::S(E)
- S(b);N_GUARD::QAR2(A)
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