MESON Chess Problem Database
Problem Display
PID: 18210 (5B2/b1n1p3/2B2P2/4N1Q1/3kPp2/R7/Kn2p2q/N1R4b w - - 0 1)
Jonsson, Gustav
2nd Prize, Die Schwalbe, 1954/II
#2
10 + 9
| 3147 | Chess Problems: Introduction to an Art | 1963 |
| 15652 | Tehtavaniekka | 2012 |
| 133 | The Problemist Supplement | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Bf3
- 2.Sxf3#
- 1...Bc5
- 2.Sc2#
- 1...Sd1
- 2.Rc4#
- 2.Rd3#
- 1...Sd3
- 2.Rxd3#
- 1...Sa4
- 2.Rc4#
- 2.Rd3#
- 1...Sc4
- 2.Rxc4#
- 1...f3
- 2.Sb3#
- 1...exf6
- 2.Sc2#
- 1...e6
- 2.Sc2#
- 1...Bf3
- Tries
- 1.Sg4?
- threat
- 2.Qe5#
- 1...exf6
- 2.Qxf6#
- 1...Sd3
- 2.Sb3#
- 1...Sc4
- 2.Sc2#
- 1...f3
- 2.Qe3#
- 1...e5
- 2.Qxe5#
- 1...Qh5!
- threat
- 1.Sg6?
- threat
- 2.Qe5#
- 1...exf6
- 2.Qxf6#
- 1...Qh5
- 2.Qg1#
- 1...Sc4
- 2.Sc2#
- 1...f3
- 2.Qe3#
- 1...e5
- 2.Qxe5#
- 1...Sd3!
- threat
- 1.Sd7?
- threat
- 2.Qe5#
- 1...exf6
- 2.Qxf6#
- 1...Qh5
- 2.Qg1#
- 1...Sc4
- 2.Sc2#
- 1...f3
- 2.Qe3#
- 1...e5
- 2.Qxe5#
- 1...Sd3!
- threat
- 1.Sf7?
- threat
- 2.Qe5#
- 1...exf6
- 2.Qxf6#
- 1...Qh5
- 2.Qg1#
- 1...Sc4
- 2.Sc2#
- 1...f3
- 2.Qe3#
- 1...e5
- 2.Qxe5#
- 1...Sd3!
- threat
- 1.Bd5?
- threat
- 2.Sc6#
- 1...Sd3
- 2.Rxd3#
- 1...Sc4
- 2.Rxc4#
- 1...Sxd5!
- threat
- 1.Rac3?
- threat
- 2.Sb3#
- 1...Sd3
- 2.Rxd3#
- 1...Sd5!
- threat
- 1.Sg4?
- Keys
- 1.Sc4!
- threat
- 2.Qe5#
- 1...Sxc4
- 2.Sc2#
- 1...exf6
- 2.Qxf6#
- 1...Sd5
- 2.Qxd5#
- 1...Qh5
- 2.Qg1#
- 1...Sd3
- 2.Sb3#
- 1...f3
- 2.Qe3#
- 1...e5
- 2.Qxe5#
- threat
- 1.Sc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- B(a);N_GUARD::S(F),XB(a)
- B(g);SBLOCK::S(A)
- S(b);N_GUARD::R1(D),XS(b)
- S(b);N_GUARD::R1(B),XS(b)
- P(f);::S(A)
- P(i);XP(I)::S(A)
- P(i);::S(A)
- Tries
- Try
- S(F);
- Threat
- QAB1(G)
- Vars
- P(i);OGATE,XP(I)::QAB(G),XP(i)
- S(b);SBLOCK::S(A)
- P(f);OGATE::QAB1(G)
- P(i);::QAB1(G),XP(i)
- Refutation
- Q(d);
- Try
- S(F);
- Threat
- QAB1(G)
- Vars
- P(i);OGATE,XP(I)::QAB(G),XP(i)
- Q(d);N_GUARD::QAB(G)
- S(b);SBLOCK::S(A)
- P(f);OGATE::QAB1(G)
- P(i);::QAB1(G),XP(i)
- Refutation
- S(b);
- Try
- S(F);
- Threat
- QAB1(G)
- Vars
- P(i);OGATE,XP(I)::QAB(G),XP(i)
- Q(d);N_GUARD::QAB(G)
- S(b);SBLOCK::S(A)
- P(f);OGATE::QAB1(G)
- P(i);::QAB1(G),XP(i)
- Refutation
- S(b);
- Try
- S(F);
- Threat
- QAB1(G)
- Vars
- P(i);OGATE,XP(I)::QAB(G),XP(i)
- Q(d);N_GUARD::QAB(G)
- S(b);SBLOCK::S(A)
- P(f);OGATE::QAB1(G)
- P(i);::QAB1(G),XP(i)
- Refutation
- S(b);
- Try
- B(H);
- Threat
- S(F)
- Vars
- S(b);N_GUARD::R1(D),XS(b)
- S(b);N_GUARD::R1(B),XS(b)
- Refutation
- S(h);XB(H)
- Try
- R(D);
- Threat
- S(A)
- Vars
- S(b);N_GUARD::R1(D),XS(b)
- Refutation
- S(h);
- Try
- Actual
- S(F);
- Threat
- QAB1(G)
- Vars
- S(b);SBLOCK,XS(F)::S(A)
- P(i);OGATE,XP(I)::QAB(G),XP(i)
- S(h);N_GUARD::QAR1(G),XS(h)
- Q(d);N_GUARD::QAB(G)
- S(b);SBLOCK::S(A)
- P(f);OGATE::QAB1(G)
- P(i);::QAB1(G),XP(i)
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