MESON Chess Problem Database
Problem Display
PID: 15421 (3rB3/1rq1p3/8/3R4/N1k1P3/4P3/KR1BP3/4n3 w - - 0 1)
Froberg, Johan Hilding Laurentius
The Problemist, 1983
#2
9 + 6
SOLUTION
- SOUND
- Sets
- 1...Qh2
- 2.Rc5#
- 1...Qg3
- 2.Rc5#
- 1...Qf4
- 2.Rc5#
- 1...Qb8
- 2.Rc5#
- 1...Qc5
- 2.Rxc5#
- 1...Qd7
- 2.Rc5#
- 1...Rxb2+
- 2.Sxb2#
- 1...Rb4
- 2.Rxb4#
- 1...Rb5
- 2.Bxb5#
- 1...Ra7
- 2.Bb5#
- 2.Rb4#
- 1...Ra8
- 2.Rd4#
- 1...Rb8
- 2.Rd4#
- 1...Rc8
- 2.Rd4#
- 1...Rxe8
- 2.Rd4#
- 1...Sc2
- 2.Rxc2#
- 1...Sg2
- 2.Rc2#
- 1...Sd3
- 2.Rc2#
- 2.exd3#
- 1...Sf3
- 2.Rc2#
- 1...Qh2
- Tries
- 1.Bf7?
- threat
- 2.Rd4#
- 2.Rc5#
- 1...Rxb2+
- 2.Sxb2#
- 1...Rxd5
- 2.Bxd5#
- 1...Qc5
- 2.Rd4#
- 2.Rxc5#
- 1...Rb3
- 2.Rc5#
- 1...Rb4
- 2.Rxb4#
- 2.Rc5#
- 1...e6!
- threat
- 1.Rxb7?
- threat
- 2.Sb2#
- 2.Bb5#
- 2.Rb4#
- 2.Rxc7#
- 1...Qxb7
- 2.Rc5#
- 1...Rxd5
- 2.Rb4#
- 1...Rxe8
- 2.Sb2#
- 2.Rd4#
- 2.Rb4#
- 2.Rxc7#
- 1...Qh2
- 2.Sb2#
- 2.Sb6#
- 2.Bb5#
- 2.Rc5#
- 2.Rb4#
- 1...Qg3
- 2.Sb2#
- 2.Sb6#
- 2.Bb5#
- 2.Rc5#
- 2.Rb4#
- 1...Qf4
- 2.Sb2#
- 2.Sb6#
- 2.Bb5#
- 2.Rc5#
- 2.Rb4#
- 1...Qe5
- 2.Sb6#
- 2.Bb5#
- 2.Rb4#
- 1...Qb6
- 2.Sxb6#
- 1...Qd6
- 2.Sb2#
- 2.Bb5#
- 1...Qb8
- 2.Sb2#
- 2.Sb6#
- 2.Bb5#
- 2.Rc5#
- 1...Qc5
- 2.Sb2#
- 2.Rxc5#
- 1...Qc6
- 2.Sb2#
- 2.Rb4#
- 1...Qd7
- 2.Sb2#
- 2.Sb6#
- 2.Rc5#
- 2.Rb4#
- 1...Qc8
- 2.Sb2#
- 2.Sb6#
- 2.Bb5#
- 2.Rb4#
- 1...Rd6
- 2.Sb2#
- 2.Bb5#
- 2.Rb4#
- 1...Rd7
- 2.Sb2#
- 2.Rb4#
- 1...Ra8
- 2.Bb5#
- 2.Rd4#
- 2.Rb4#
- 2.Rxc7#
- 1...Rb8
- 2.Sb2#
- 2.Bb5#
- 2.Rd4#
- 2.Rxc7#
- 1...Rc8
- 2.Sb2#
- 2.Bb5#
- 2.Rd4#
- 2.Rb4#
- 1...Sc2
- 2.Sb2#
- 2.Bb5#
- 2.Rxc7#
- 1...Sd3
- 2.Bb5#
- 2.exd3#
- 1...Qa5!
- threat
- 1.Bf7?
- Keys
- 1.Rbb5!
- threat
- 2.Sb2#
- 1...Rxb5
- 2.Bxb5#
- 1...Qa5
- 2.Rdc5#
- 1...Qe5
- 2.Rbc5#
- 1...Ra7
- 2.Rb4#
- 1...Ra8
- 2.Rd4#
- 1...Sd3
- 2.exd3#
- threat
- 1.Rbb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 14
- Sets
- Q(d);N_GUARD::R1(H)
- Q(d);N_GUARD::R1(H),XQ(d)
- R(c);CHECK,XR(B)::S(F),XR(c)
- R(c);N_GUARD::R1(B),XR(c)
- R(c);N_GUARD::B(I),XR(c)
- R(f);N_GUARD,P_PINS(F)::R1(H)
- R(f);N_GUARD::R1(H)
- R(f);N_GUARD,XB(I)::R1(H)
- S(a);N_GUARD::R(B),XS(a)
- S(a);N_GUARD::R(B)
- Tries
- Try
- B(I);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,XR(B)::S(F),XR(c)
- R(f);OGATE,P_SPINR(f),XR(H)::B(I),XR(f)
- R(c);::B(I)+R(H),DCHECK
- Refutation
- P(e);
- Try
- R(B);XR(c)
- Threat
- DUALS(4)
- Vars
- Q(d);N_GUARD,XR(B)::R1(H)
- R(f);XR(H)::R1(B)
- Q(d);N_GUARD::S(F),XQ(d)
- Refutation
- Q(d);P_PINS(F)
- Try
- Actual
- R(B);
- Threat
- S(F)
- Vars
- R(c);OGATE,XR(B)::B(I),XR(c)
- Q(d);N_GUARD,P_PINS(F)::R1(H)
- Q(d);N_GUARD::R1(B)
- R(c);N_GUARD,P_PINS(F)::R1(B)
- R(f);N_GUARD,P_PINS(F)::R1(H)
- S(a);OGATE::P(D),XS(a)
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