MESON Chess Problem Database
Problem Display
PID: 15391 (2K5/p7/5B2/rR1R1r2/1Nk5/8/2BP1pp1/5q2 w - - 0 1)
Froberg, Johan Hilding Laurentius
Neue Zurcher Zeitung, 1983
#2
7 + 7
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.d3#
- 1...Qb1
- 2.d3#
- 1...Qc1
- 2.d3#
- 1...Qe1
- 2.d3#
- 1...Qg1
- 2.d3#
- 1...Qh1
- 2.d3#
- 1...Rf3
- 2.Rdc5#
- 1...Rf4
- 2.Rdc5#
- 1...Qa1
- Tries
- 1.Sd3?
- threat
- 2.Sb2#
- 2.Bb3#
- 1...Qxd3
- 2.Bxd3#
- 1...Rxb5
- 2.Rd4#
- 1...Rxd5
- 2.Rb4#
- 1...Qa1
- 2.Bb3#
- 1...Qc1
- 2.Bb3#
- 1...Qd1
- 2.Sb2#
- 1...Ra2
- 2.Bb3#
- 2.Rbc5#
- 1...Ra3
- 2.Sb2#
- 2.Rbc5#
- 1...Qb1!
- threat
- 1.Sd3?
- Keys
- 1.Sa6!
- threat
- 2.Bb3#
- 1...Rxb5
- 2.Rd4#
- 1...Rxd5
- 2.Rb4#
- 1...Qd3
- 2.Bxd3#
- 1...Qb1
- 2.d3#
- 1...Qd1
- 2.Bd3#
- 1...Ra3
- 2.Rbc5#
- 1...Rf3
- 2.Rdc5#
- threat
- 1.Sa6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 6
- Sets
- Q(a);N_GUARD::P(B)
- R(f);N_GUARD::R1(E)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(a);OGATE,XS(C)::B(A),XQ(a)
- R(e);SBLOCK,XR(D)::R1(E)
- R(f);SBLOCK,XR(E)::R1(D)
- Q(a);::B(A)
- Q(a);::S(C)
- Refutation
- Q(a);
- Try
- Actual
- S(C);
- Threat
- B(A)
- Vars
- R(e);SBLOCK,XR(D)::R1(E)
- R(f);SBLOCK,XR(E)::R1(D)
- Q(a);N_GUARD::B(A),XQ(a)
- Q(a);N_GUARD::P(B)
- Q(a);N_GUARD::B(A)
- R(e);N_GUARD::R1(D)
- R(f);N_GUARD::R1(E)
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