MESON Chess Problem Database
Problem Display
PID: 142029 (7q/3B1bb1/3P1rp1/QRPkNnP1/1P1P4/1p1Kp3/2N1PP2/8 w - - 0 1)
Ohquist, Johannes
British Chess Magazine 06. Ty., 1890
#2
13 + 9
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Qa8#
- 1...Qh2
- 2.Qa8#
- 1...Qh3
- 2.Qa8#
- 1...Qh4
- 2.Qa8#
- 1...Qh5
- 2.Qa8#
- 1...Qh6
- 2.Qa8#
- 1...Qh7
- 2.Qa8#
- 1...Qa8
- 2.Qxa8#
- 1...Rxd6
- 2.c6#
- 1...Re6
- 2.Bc6#
- 1...Be6
- 2.Bc6#
- 1...Be8
- 2.Qa8#
- 1...Bg8
- 2.Qa8#
- 1...Bf8
- 2.Qa8#
- 1...Sg3
- 2.Sxe3#
- 1...Sh4
- 2.Sxe3#
- 1...Sxd6
- 2.Sxe3#
- 1...Sh6
- 2.Sxe3#
- 1...Se7
- 2.Sxe3#
- 1...bxc2
- 2.Qa2#
- 1...b2
- 2.Qa2#
- 1...exf2
- 2.e4#
- 1...Qh1
- Tries
- 1.Sc4?
- threat
- 2.Sb6#
- 2.c6#
- 1...Rxd6
- 2.cxd6#
- 2.c6#
- 1...Sxd4
- 2.S2xe3#
- 1...Sxd6
- 2.S2xe3#
- 2.S4xe3#
- 2.Sb6#
- 2.cxd6#
- 1...Qd8
- 2.c6#
- 1...Qb8!
- threat
- 1.Qc7?
- threat
- 2.Qc6#
- 2.Qb7#
- 2.c6#
- 1...Rxd6
- 2.cxd6#
- 2.c6#
- 1...Sxd6
- 2.Sxe3#
- 2.Qc6#
- 2.cxd6#
- 1...Qb8
- 2.Qc6#
- 1...Qa8
- 2.c6#
- 1...Qc8
- 2.c6#
- 1...Se7
- 2.Sxe3#
- 2.c6#
- 1...Sxd4!
- threat
- 1.Qa3?
- threat
- 2.Qxb3#
- 1...Sxd6
- 2.Sxe3#
- 1...bxc2
- 2.Qa2#
- 2.Qb3#
- 1...b2
- 2.Qa2#
- 2.Qb3#
- 1...Sxd4!
- threat
- 1.Qa4?
- threat
- 2.Qxb3#
- 1...Sxd6
- 2.Sxe3#
- 1...bxc2
- 2.Qb3#
- 2.Qa2#
- 1...b2
- 2.Qb3#
- 2.Qa2#
- 1...Sxd4!
- threat
- 1.Sc4?
- Keys
- 1.Qa1!
- 1...Rxd6
- 2.c6#
- 1...Sxd4
- 2.Qxd4#
- 1...Sxd6
- 2.Sxe3#
- 1...bxc2
- 2.Qa2#
- 1...exf2
- 2.e4#
- 1...Qb8
- 2.Qh1#
- 1...Qh1
- 2.Qxh1#
- 2.Qa8#
- 1...Qh2
- 2.Qa8#
- 1...Qh3
- 2.Qa8#
- 1...Qh4
- 2.Qa8#
- 1...Qh5
- 2.Qa8#
- 1...Qh6
- 2.Qa8#
- 1...Qh7
- 2.Qa8#
- 1...Qa8
- 2.Qh1#
- 2.Qxa8#
- 1...Qc8
- 2.Qh1#
- 1...Qd8
- 2.Qh1#
- 1...Qe8
- 2.Qh1#
- 1...Qf8
- 2.Qh1#
- 1...Qg8
- 2.Qh1#
- 1...Re6
- 2.Bc6#
- 1...Be6
- 2.Bc6#
- 1...Be8
- 2.Qa8#
- 1...Bg8
- 2.Qa8#
- 1...Bh6
- 2.Qh1#
- 1...Bf8
- 2.Qa8#
- 1...Sg3
- 2.Sxe3#
- 1...Sh4
- 2.Sxe3#
- 1...Sh6
- 2.Sxe3#
- 1...Se7
- 2.Sxe3#
- 1...b2
- 2.Qa2#
- 1...Rxd6
- 1.Qa1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 2
- Sets
- Q(i);N_GUARD::QAB(G)
- Q(i);N_GUARD::QAB(G),XQ(i)
- R(e);SBLOCK,XP(L)::R(H)+P(I)
- R(e);SBLOCK::B(M)
- B(g);SBLOCK::B(M)
- B(g);S_CUTQ(i)::QAB(G)
- B(h);S_CUTQ(i)::QAB(G)
- S(d);N_GUARD::S(A),XP(b)
- S(d);N_GUARD,XP(L)::S(A),XP(b)
- P(a);OGATEB,XS(A)::QAB(G)
- P(a);OGATEB::QAB(G)
- P(b);OGATE,XP(C)::P(B)
- Tries
- Try
- S(J);
- Threat
- DUALS(2)
- Vars
- S(d);N_GUARD,XP(F)::S(A),XP(b)
- Q(i);::R(H)+P(I)
- Refutation
- Q(i);
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- Q(i);::QAB1(G)
- Q(i);::R(H)+P(I)
- Refutation
- S(d);XP(F)
- Try
- Q(G);
- Threat
- QAB(G),XP(a)
- Vars
- S(d);N_GUARD,XP(L)::S(A),XP(b)
- Refutation
- S(d);XP(F)
- Try
- Q(G);
- Threat
- QAB(G),XP(a)
- Vars
- S(d);N_GUARD,XP(L)::S(A),XP(b)
- Refutation
- S(d);XP(F)
- Try
- Actual
- Q(G);
- Vars
- R(e);SBLOCK,XP(L)::R(H)+P(I)
- S(d);OGATE,XP(F)::QAR1(G),XS(d)
- S(d);N_GUARD,XP(L)::S(A),XP(b)
- P(a);OGATEB,XS(A)::QAB(G)
- P(b);OGATE,XP(C)::P(B)
- Q(i);N_GUARD::QAB(G)
- R(e);SBLOCK::B(M)
- B(g);SBLOCK::B(M)
- B(g);S_CUTQ(i)::QAB(G)
- B(h);S_CUTQ(i)::QAB(G)
- S(d);N_GUARD::S(A),XP(b)
- P(a);OGATEB::QAB(G)
Developed and maintained by Brian Stephenson.
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