MESON Chess Problem Database
Problem Display
PID: 160448 (4r1b1/4R3/3Q4/8/3npNqB/3pk3/1N3Rnp/7K w - - 0 1)
Jonsson, Gustav
1st Prize, Schackvarlden, 1940
#2
7 + 9
| 133 | The Problemist Supplement | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Qd1+
- 2.Sxd1#
- 1...Qh3
- 2.Sd1#
- 1...Qf5
- 2.Sd1#
- 2.Sxg2#
- 1...Qh5
- 2.Sxg2#
- 1...Qe6
- 2.Sd1#
- 2.Sxg2#
- 1...Qd7
- 2.Sd1#
- 2.Sxg2#
- 1...Qc8
- 2.Sd1#
- 2.Sxg2#
- 1...Qg3
- 2.Sd1#
- 1...Qxf4
- 2.Sd1#
- 1...Qxh4
- 2.Sd1#
- 1...Qg5
- 2.Sd1#
- 1...Qg6
- 2.Sd1#
- 1...Qg7
- 2.Sd1#
- 1...Bc4
- 2.Sxc4#
- 1...Bd5
- 2.Sxd5#
- 1...Bh7
- 2.Sc4#
- 2.Sd5#
- 1...Sc2
- 2.Qxd3#
- 1...Se2
- 2.Qxd3#
- 1...Sb3
- 2.Qxd3#
- 1...Sf3
- 2.Sd1#
- 1...Sb5
- 2.Qxd3#
- 1...Sf5
- 2.Qxd3#
- 1...Sc6
- 2.Qxd3#
- 1...Se6
- 2.Sc4#
- 1...Qd1+
- Tries
- 1.Se6?
- threat
- 2.Sc4#
- 2.Qxd4#
- 1...Qd1+
- 2.Sxd1#
- 1...Qxe6
- 2.Sd1#
- 1...Qxh4
- 2.Sd1#
- 2.Qxd4#
- 1...Sxh4
- 2.Qxd4#
- 1...Sxe6
- 2.Sc4#
- 1...Qe2
- 2.Sc4#
- 1...Qg3
- 2.Sd1#
- 2.Qxd4#
- 1...Se2
- 2.Sc4#
- 1...Qg7
- 2.Sd1#
- 2.Sc4#
- 1...Rc8
- 2.Qxd4#
- 1...Rd8
- 2.Sc4#
- 1...Sc2
- 2.Sc4#
- 1...Sb3
- 2.Sc4#
- 1...Sf3
- 2.Sd1#
- 2.Sc4#
- 1...Sb5
- 2.Sc4#
- 1...Sf5
- 2.Sc4#
- 1...Sc6
- 2.Sc4#
- 1...d2
- 2.Qxd4#
- 1...Bxe6!
- threat
- 1.Rf7?
- threat
- 2.Sc4#
- 2.Sd5#
- 1...Qd1+
- 2.Sxd1#
- 1...Qxf4
- 2.Sd1#
- 2.Sc4#
- 1...Qxh4
- 2.Sd1#
- 2.Sxg2#
- 2.Sd5#
- 1...Sxf4
- 2.Sc4#
- 1...Sxh4
- 2.Sd5#
- 1...Qe2
- 2.Sc4#
- 1...Qg3
- 2.Sd1#
- 2.Sd5#
- 1...Se2
- 2.Sc4#
- 1...Qf5
- 2.Sd1#
- 2.Sc4#
- 2.Sxg2#
- 1...Qh5
- 2.Sc4#
- 2.Sxg2#
- 1...Qe6
- 2.Sd1#
- 2.Sxg2#
- 1...Qc8
- 2.Sd1#
- 2.Sxg2#
- 2.Sd5#
- 1...Qg5
- 2.Sd1#
- 2.Sc4#
- 1...Re5
- 2.Sc4#
- 1...Rc8
- 2.Sd5#
- 1...Sc2
- 2.Sc4#
- 1...Sb3
- 2.Sc4#
- 1...Sf3
- 2.Sd1#
- 2.Sc4#
- 1...Sb5
- 2.Sc4#
- 1...Sf5
- 2.Sc4#
- 1...Sc6
- 2.Sc4#
- 1...Se6
- 2.Sc4#
- 1...Bxf7!
- threat
- 1.Se6?
- Keys
- 1.Qb4!
- threat
- 2.Qd2#
- 1...Qd1+
- 2.Sxd1#
- 1...Sf3
- 2.Qxe4#
- 1...Qe2
- 2.Sxg2#
- 1...Sc2
- 2.Qxe4#
- 1...Se2
- 2.Sd1#
- 1...Sb3
- 2.Qxe4#
- 1...Sb5
- 2.Qxe4#
- 1...Sf5
- 2.Qxe4#
- 1...Sc6
- 2.Qxe4#
- 1...Se6
- 2.Sd5#
- 1...d2
- 2.Qxd2#
- 2.Qc3#
- threat
- 1.Qb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 8
- ADDED MATES = 1
- REMOVED MATES = 10
- Sets
- Q(g);CHECK,N_GUARD::S(B),XQ(g)
- Q(g);N_GUARD::S(B)
- Q(g);N_GUARD::S(D),XS(a)
- Q(g);N_GUARD,XS(D)::S(B)
- Q(g);N_GUARD,XB(E)::S(B)
- B(i);N_GUARD::S(B),XB(i)
- B(i);N_GUARD::S(D),XB(i)
- S(e);OGATE::QAR1(F),XP(c)
- S(e);S_CUTQ(g)::S(B)
- S(e);N_SPINP(f),S_CUTB(i)::S(B)
- Tries
- Try
- S(D);N_PINP(f)
- Threat
- DUALS(2)
- Vars
- Q(g);CHECK,N_GUARD::S(B),XQ(g)
- Q(g);N_GUARD,XS(D)::S(B)
- S(a);XB(E)::QAB1(F),XS(e)
- S(e);XS(D)::S(B)
- Q(g);::S(B)
- S(e);::S(B)
- R(h);::QAB1(F),XS(e)
- R(h);::S(B)
- P(c);::QAB1(F),XS(e)
- Refutation
- B(i);XS(D)
- Try
- R(G);N_PINP(f)
- Threat
- DUALS(2)
- Vars
- Q(g);CHECK,N_GUARD::S(B),XQ(g)
- S(a);XS(D)::S(B)
- S(a);XB(E)::S(D)
- Q(g);::S(B)
- S(e);::S(B)
- R(h);::S(B)
- R(h);::S(D)
- Refutation
- B(i);XR(G)
- Try
- Actual
- Q(F);
- Threat
- QAB1(F)
- Vars
- Q(g);CHECK,N_GUARD::S(B),XQ(g)
- S(e);OGATE::QAR1(F),XP(f)
- Q(g);N_GUARD::S(D),XS(a)
- S(e);S_CUTQ(g)::S(B)
- S(e);N_SPINP(f),S_CUTB(i)::S(D)
Developed and maintained by Brian Stephenson.
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CSS/Javascript (jQuery, Bootstrap & DataTables).