MESON Chess Problem Database
Problem Display
PID: 10117 (8/3n1pP1/2R5/NP1k1nN1/4R3/7K/P2P2P1/1B5Q w - - 0 1)
Jonsson, Gustav
Die Schwalbe, 1962
#2
12 + 4
| 3147 | Chess Problems: Introduction to an Art | 1963 |
| 5862 | An ABC of Chess Problems | 1970 |
SOLUTION
- SOUND
- Sets
- 1...f6
- 2.g8Q#
- 2.g8B#
- 1...f6
- Tries
- 1.Sb7?
- 1...Sxg7
- 2.Rd6#
- 1...Se3
- 2.Rd6#
- 1...Sg3
- 2.Rd6#
- 1...Sh4
- 2.Rd6#
- 1...Sd6
- 2.Rxd6#
- 1...Sh6
- 2.Rd6#
- 1...Se7
- 2.Rd6#
- 1...Sc5
- 2.Rxc5#
- 1...Se5
- 2.Rc5#
- 1...Sb6
- 2.Rc5#
- 1...Sf6
- 2.Rc5#
- 1...Sb8
- 2.Rc5#
- 1...Sf8
- 2.Rc5#
- 1...f6
- 2.g8Q#
- 2.g8B#
- 1...Sd4!
- 1...Sxg7
- 1.Sf3?
- 1...Sxg7
- 2.Rd4#
- 1...Se3
- 2.Rd4#
- 1...Sg3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sh4
- 2.Rd4#
- 1...Sh6
- 2.Rd4#
- 1...Se7
- 2.Rd4#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sb6
- 2.Re5#
- 1...Sf6
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...f6
- 2.g8Q#
- 2.g8B#
- 1...Sd6!
- 1...Sxg7
- 1.Qf1?
- threat
- 2.Qc4#
- 1...Se3
- 2.Qd3#
- 2.Qxf7#
- 1...Sd6
- 2.Qd3#
- 1...Sb6
- 2.Qxf5#
- 1...Se5!
- threat
- 1.Qg1?
- 1...Sxg7
- 2.Qd4#
- 1...Sg3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sh4
- 2.Qd4#
- 1...Sd6
- 2.Qd4#
- 1...Sh6
- 2.Qd4#
- 1...Se7
- 2.Qd4#
- 1...Sc5
- 2.Qxc5#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Sf6
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...f6
- 2.g8Q#
- 2.g8B#
- 1...Se3!
- 1...Sxg7
- 1.Qh2?
- 1...Sxg7
- 2.Qd6#
- 1...Se3
- 2.Qd6#
- 1...Sd4
- 2.Qd6#
- 1...Sh4
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sh6
- 2.Qd6#
- 1...Se7
- 2.Qd6#
- 1...Sc5
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sb6
- 2.Qe5#
- 1...Sf6
- 2.Qe5#
- 1...Sb8
- 2.Qe5#
- 1...Sf8
- 2.Qe5#
- 1...f6
- 2.g8Q#
- 2.g8B#
- 1...Sg3!
- 1...Sxg7
- 1.g8S?
- 1...Se3
- 2.Se7#
- 1...Sg3
- 2.Se7#
- 1...Sd4
- 2.Se7#
- 1...Sh4
- 2.Se7#
- 1...Sd6
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sg7
- 2.Se7#
- 1...Sc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sb8
- 2.Sf6#
- 1...Sf8
- 2.Sf6#
- 1...f6!
- 1...Se3
- 1.Sb7?
- Keys
- 1.Sc4!
- 1...Sxg7
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh4
- 2.Se3#
- 1...Sd6
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Se7
- 2.Se3#
- 1...Sc5
- 2.Sb6#
- 1...Se5
- 2.Sb6#
- 1...Sb6
- 2.Sxb6#
- 1...Sf6
- 2.Sb6#
- 1...Sb8
- 2.Sb6#
- 1...Sf8
- 2.Sb6#
- 1...f6
- 2.g8Q#
- 2.g8B#
- 1...Sxg7
- 1.Sc4!
This is after
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 14
- REMOVED MATES = 0
- Sets
- P(d);::P=Q
- Tries
- Try
- S(H);
- Vars
- S(b);N_GUARD,XP(L)::R1(K)
- S(b);N_GUARD::R1(K)
- S(b);N_GUARD::R1(K),XS(b)
- S(c);N_GUARD::R1(K),XS(c)
- S(c);N_GUARD::R1(K)
- P(d);::P=Q
- Refutation
- S(b);
- Try
- S(J);
- Vars
- S(b);N_GUARD,XP(L)::R1(G)
- S(b);N_GUARD::R1(G)
- S(b);N_GUARD::R1(G),XS(b)
- S(c);N_GUARD::R1(G)
- S(c);N_GUARD::R1(G),XS(c)
- P(d);::P=Q
- Refutation
- S(b);
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- S(b);N_GUARD::QAR2(B)
- S(c);N_GUARD::QAR2(B),XS(b)
- Refutation
- S(c);
- Try
- Q(B);
- Vars
- S(b);N_GUARD,XP(L)::QAR1(B)
- S(b);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAR1(B),XS(b)
- S(c);N_GUARD::QAR1(B),XS(c)
- S(c);N_GUARD::QAR1(B)
- P(d);::P=Q
- Refutation
- S(b);
- Try
- Q(B);
- Vars
- S(b);N_GUARD,XP(L)::QAR1(B)
- S(b);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAR1(B),XS(b)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(d);::P=Q
- Refutation
- S(b);
- Try
- P(L);
- Vars
- S(b);N_GUARD::S(L)
- S(b);N_GUARD::S(L),XS(b)
- S(c);N_GUARD::S(L)
- S(c);N_GUARD::S(L),XS(c)
- Refutation
- P(d);
- Try
- Actual
- S(H);
- Vars
- S(b);N_GUARD,XP(L)::S(H)
- S(b);N_GUARD::S(H),XS(b)
- S(b);N_GUARD::S(H)
- S(c);N_GUARD::S(H)
- S(c);N_GUARD::S(H),XS(c)
- P(d);::P=Q
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