MESON Chess Problem Database
Problem Display
PID: 66283 (7Q/8/2B1P3/8/npk5/5n2/2P2B2/2KN4 w - - 0 1)
Stal, Karl Alfred
British Chess Magazine, 1889
#2
7 + 4
SOLUTION
- SOUND
- Sets
- 1...Se1
- 2.Qd4#
- 2.Qh4#
- 1...Sg1
- 2.Qd4#
- 2.Qh4#
- 1...Sd2
- 2.Qd4#
- 1...Sh2
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sh4
- 2.Qd4#
- 2.Qxh4#
- 1...Sg5
- 2.Qd4#
- 1...Sb2
- 2.Sxb2#
- 1...Sc3
- 2.Sb2#
- 1...Sc5
- 2.Sb2#
- 2.Se3#
- 1...Sb6
- 2.Sb2#
- 1...Se1
- Tries
- 1.Qb2?
- threat
- 2.Qb3#
- 1...Sd4
- 2.Qxd4#
- 1...b3
- 2.Qxb3#
- 1...Sd2
- 2.Qd4#
- 1...Sc5
- 2.Se3#
- 1...Sxb2!
- threat
- 1.Qc3+?
- 1...Sxc3
- 2.Sb2#
- 1...bxc3!
- 1...Sxc3
- 1.Qe5?
- threat
- 2.Se3#
- 2.Bb5#
- 2.Qe2#
- 2.Qb5#
- 2.Qd5#
- 1...b3
- 2.Qb5#
- 1...Se1
- 2.Se3#
- 2.Bb5#
- 2.Qd4#
- 2.Qf4#
- 2.Qe4#
- 2.Qb5#
- 2.Qd5#
- 1...Sg1
- 2.Se3#
- 2.Bb5#
- 2.Qd4#
- 2.Qf4#
- 2.Qe4#
- 2.Qb5#
- 2.Qd5#
- 1...Sd4
- 2.Qxd4#
- 2.Qd5#
- 1...Sb2
- 2.Sxb2#
- 2.Se3#
- 2.Bb5#
- 2.Qb5#
- 2.Qc5#
- 2.Qd5#
- 1...Sc3
- 2.Sb2#
- 2.Se3#
- 2.Qc5#
- 1...Sc5
- 2.Sb2#
- 2.Se3#
- 2.Qxc5#
- 2.Qd5#
- 1...Sb6
- 2.Sb2#
- 2.Se3#
- 2.Bb5#
- 2.Qe2#
- 2.Qb5#
- 2.Qc5#
- 1...Sxe5!
- threat
- 1.Qf6?
- 1...Sd4
- 2.Qxd4#
- 1...Se5
- 2.Qf4#
- 1...Se1
- 2.Qd4#
- 2.Qh4#
- 2.Qf4#
- 1...Sg1
- 2.Qd4#
- 2.Qh4#
- 2.Qf4#
- 1...Sd2
- 2.Qd4#
- 1...Sh2
- 2.Qd4#
- 2.Qf4#
- 1...Sh4
- 2.Qd4#
- 2.Qxh4#
- 2.Qf4#
- 1...Sg5
- 2.Qd4#
- 1...Sb2
- 2.Sxb2#
- 1...Sc3
- 2.Sb2#
- 1...Sc5
- 2.Sb2#
- 2.Se3#
- 1...Sb6
- 2.Sb2#
- 1...b3!
- 1...Sd4
- 1.Qh4+?
- 1...Sd4
- 2.Qxd4#
- 1...Sxh4!
- 1...Sd4
- 1.Qh5?
- threat
- 2.Bb5#
- 2.Qb5#
- 2.Qd5#
- 1...b3
- 2.Qb5#
- 1...Sd4
- 2.Qd5#
- 1...Sg5
- 2.Qe2#
- 1...Sc3
- 2.Sb2#
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 2.Qd5#
- 1...Sb6
- 2.Bb5#
- 2.Qb5#
- 2.Qc5#
- 1...Se5!
- threat
- 1.Qd8?
- threat
- 2.Qd3#
- 2.Qd5#
- 1...Sd4
- 2.Qxd4#
- 2.Qd5#
- 1...Se5
- 2.Qd4#
- 2.Qd5#
- 1...Se1
- 2.Qh4#
- 2.Qd4#
- 2.Qd5#
- 1...Sb2
- 2.Qd5#
- 1...Sc3
- 2.Sb2#
- 2.Qd3#
- 1...Sc5
- 2.Qd5#
- 1...Sb6
- 2.Qd3#
- 1...b3!
- threat
- 1.Qb2?
- Keys
- 1.Qa1!
- 1...Sd4
- 2.Qxd4#
- 1...b3
- 2.Qxa4#
- 1...Se5
- 2.Qd4#
- 1...Se1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sh2
- 2.Qd4#
- 1...Sh4
- 2.Qd4#
- 1...Sg5
- 2.Qd4#
- 1...Sb2
- 2.Qa6#
- 1...Sc3
- 2.Sb2#
- 1...Sc5
- 2.Se3#
- 1...Sb6
- 2.Qa6#
- 1...Sd4
- 1.Qa1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAR1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(b);N_GUARD::S(B),XS(b)
- S(b);N_GUARD::S(B)
- Tries
- Try
- Q(G);
- Threat
- QAB1(G)
- Vars
- S(a);N_GUARD::QAR1(G),XS(a)
- P(c);::QAB1(G),XP(c)
- S(a);N_GUARD::QAR1(G)
- S(b);SBLOCK::S(B)
- Refutation
- S(b);XQ(G)
- Try
- Q(G);CHECK
- Vars
- S(b);SBLOCK,XQ(G)::S(B)
- Refutation
- P(c);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(5)
- Vars
- P(c);::QAB1(G)
- Refutation
- S(a);XQ(G)
- Try
- Q(G);
- Vars
- S(a);N_GUARD::QAR1(G),XS(a)
- S(a);N_GUARD::QAR(G)
- S(a);N_GUARD::QAR1(G)
- S(b);N_GUARD::S(B),XS(b)
- S(b);N_GUARD::S(B)
- Refutation
- P(c);
- Try
- Q(G);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAR1(G),XS(a)
- Refutation
- S(a);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- P(c);::QAB1(G)
- S(a);::QAB1(G)
- S(a);OGATE::QAB(G)
- Refutation
- S(a);
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- S(b);::QAB1(G)
- Refutation
- P(c);
- Try
- Actual
- Q(G);
- Vars
- S(a);N_GUARD::QAR1(G),XS(a)
- P(c);OGATEB::QAR2(G),XS(b)
- S(a);N_GUARD::QAR1(G)
- S(b);OGATE::QAB(G)
- S(b);N_GUARD,SBLOCK::S(B)
- S(b);SBLOCK::S(B)
Developed and maintained by Brian Stephenson.
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