MESON Chess Problem Database
Problem Display
PID: 17840 (8/8/1pp2p2/bnrk1P1p/1PN1RKpP/3BpPQ1/2N1P3/3R1n2 w - - 0 1)
Froberg, Johan Hilding Laurentius
6th HM., Goteborg Postens, 1951
#2
12 + 11
| 56 | The Problemist | 2006 |
SOLUTION
- SOUND
- Sets
- 1...Rxc4
- 2.Bxc4#
- 1...Bxb4
- 2.Sxb4#
- 1...Sd2
- 2.S2xe3#
- 1...Sh2
- 2.S2xe3#
- 1...Sxg3
- 2.S2xe3#
- 1...Sa3
- 2.Rd4#
- 1...Sc3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rd4#
- 1...Sa7
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...gxf3
- 2.Qg8#
- 1...Rxc4
- Tries
- 1.S4xe3+?
- 1...Sxe3
- 2.Bc4#
- 1...Kd6!
- 1...Sxe3
- 1.Sxb6+?
- 1...Bxb6
- 2.Bc4#
- 1...Kd6!
- 1...Bxb6
- 1.Ra1?
- 1...Bxb4
- 2.Sxb4#
- 1...Sxg3
- 2.S2xe3#
- 1...gxf3
- 2.Qg8#
- 1...Sd2
- 2.S2xe3#
- 1...Sh2
- 2.S2xe3#
- 1...Sa3
- 2.Rd4#
- 1...Sc3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rd4#
- 1...Sa7
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Rxc4!
- 1...Bxb4
- 1.Rb1?
- 1...Bxb4
- 2.Sxb4#
- 1...Sxg3
- 2.S2xe3#
- 1...gxf3
- 2.Qg8#
- 1...Sd2
- 2.S2xe3#
- 1...Sh2
- 2.S2xe3#
- 1...Sa3
- 2.Rd4#
- 1...Sc3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rd4#
- 1...Sa7
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Rxc4!
- 1...Bxb4
- 1.Rc1?
- 1...Bxb4
- 2.Sxb4#
- 1...Sxg3
- 2.S2xe3#
- 1...gxf3
- 2.Qg8#
- 1...Sd2
- 2.S2xe3#
- 1...Sh2
- 2.S2xe3#
- 1...Sa3
- 2.Rd4#
- 1...Sc3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rd4#
- 1...Sa7
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Rxc4!
- 1...Bxb4
- 1.Re1?
- 1...Bxb4
- 2.Sxb4#
- 1...Sxg3
- 2.S2xe3#
- 1...gxf3
- 2.Qg8#
- 1...Sd2
- 2.S2xe3#
- 1...Sh2
- 2.S2xe3#
- 1...Sa3
- 2.Rd4#
- 1...Sc3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rd4#
- 1...Sa7
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Rxc4!
- 1...Bxb4
- 1.Rd2?
- 1...Rxc4
- 2.Bxc4#
- 1...Bxb4
- 2.Sxb4#
- 1...Sxd2
- 2.S2xe3#
- 1...Sxg3
- 2.S2xe3#
- 1...gxf3
- 2.Qg8#
- 1...Sh2
- 2.S2xe3#
- 1...Sa3
- 2.Rd4#
- 1...Sc3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rd4#
- 1...Sa7
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...exd2!
- 1...Rxc4
- 1.Qg1?
- 1...Rxc4
- 2.Bxc4#
- 1...Bxb4
- 2.Sxb4#
- 1...gxf3
- 2.Qg8#
- 1...Sd2
- 2.S2xe3#
- 1...Sh2
- 2.S2xe3#
- 1...Sg3
- 2.S2xe3#
- 1...Sa3
- 2.Rd4#
- 1...Sc3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rd4#
- 1...Sa7
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...g3!
- 1...Rxc4
- 1.Qg2?
- 1...Rxc4
- 2.Bxc4#
- 1...Bxb4
- 2.Sxb4#
- 1...gxf3
- 2.Qg8#
- 1...Sd2
- 2.S2xe3#
- 1...Sh2
- 2.S2xe3#
- 1...Sg3
- 2.S2xe3#
- 1...Sa3
- 2.Rd4#
- 1...Sc3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rd4#
- 1...Sa7
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...g3!
- 1...Rxc4
- 1.Qxg4?
- threat
- 2.Qg8#
- 1...Rxc4
- 2.Bxc4#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...hxg4!
- threat
- 1.fxg4?
- 1...Rxc4
- 2.Bxc4#
- 1...Bxb4
- 2.Sxb4#
- 1...Sxg3
- 2.S2xe3#
- 1...Sd2
- 2.S2xe3#
- 1...Sh2
- 2.S2xe3#
- 1...Sa3
- 2.Rd4#
- 1...Sc3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sd6
- 2.Rd4#
- 1...Sa7
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...hxg4!
- 1...Rxc4
- 1.S4xe3+?
- Keys
- 1.Re6!
- 1...Rxc4+
- 2.Be4#
- 1...Bxb4
- 2.Sxb6#
- 1...Sxg3
- 2.S4xe3#
- 1...gxf3
- 2.Qxf3#
- 1...Sd2
- 2.S4xe3#
- 1...Sh2
- 2.S4xe3#
- 1...Sa3
- 2.Rd6#
- 1...Sc3
- 2.Rd6#
- 1...Sd4
- 2.Rd6#
- 1...Sd6
- 2.Rxd6#
- 1...Sa7
- 2.Rd6#
- 1...Sc7
- 2.Rd6#
- 1...Rxc4+
- 1.Re6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 12
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(f);OGATE,P_PINR(I),XS(H)::R(A)+B(D),DCHECK,XR(f)
- B(d);XP(G)::S(B),XB(d)
- S(a);N_GUARD::S(B),XP(b)
- S(a);N_GUARD,XQ(F)::S(B),XP(b)
- S(e);N_GUARD::R1(I)
- S(e);N_GUARD::R1(I),XS(e)
- P(c);OGATE,XP(E)::QAB(F)
- Tries
- Try
- S(H);CHECK,XP(b)
- Vars
- S(a);XS(H)::R(A)+B(D),DCHECK
- Refutation
- K(g);P-FLIGHT
- Try
- S(H);CHECK,XP(i)
- Vars
- B(d);XS(H)::R(A)+B(D),DCHECK
- Refutation
- K(g);P-FLIGHT
- Try
- R(A);
- Vars
- B(d);XP(G)::S(B),XB(d)
- S(a);N_GUARD,XQ(F)::S(B),XP(b)
- P(c);OGATE,XP(E)::QAB(F)
- S(a);N_GUARD::S(B),XP(b)
- S(e);N_GUARD::R1(I)
- S(e);N_GUARD::R1(I),XS(e)
- Refutation
- R(f);P_PINR(I),XS(H)
- Try
- R(A);
- Vars
- B(d);XP(G)::S(B),XB(d)
- S(a);N_GUARD,XQ(F)::S(B),XP(b)
- P(c);OGATE,XP(E)::QAB(F)
- S(a);N_GUARD::S(B),XP(b)
- S(e);N_GUARD::R1(I)
- S(e);N_GUARD::R1(I),XS(e)
- Refutation
- R(f);P_PINR(I),XS(H)
- Try
- R(A);
- Vars
- B(d);XP(G)::S(B),XB(d)
- S(a);N_GUARD,XQ(F)::S(B),XP(b)
- P(c);OGATE,XP(E)::QAB(F)
- S(a);N_GUARD::S(B),XP(b)
- S(e);N_GUARD::R1(I)
- S(e);N_GUARD::R1(I),XS(e)
- Refutation
- R(f);P_PINR(I),XS(H)
- Try
- R(A);
- Vars
- B(d);XP(G)::S(B),XB(d)
- S(a);N_GUARD,XQ(F)::S(B),XP(b)
- P(c);OGATE,XP(E)::QAB(F)
- S(a);N_GUARD::S(B),XP(b)
- S(e);N_GUARD::R1(I)
- S(e);N_GUARD::R1(I),XS(e)
- Refutation
- R(f);P_PINR(I),XS(H)
- Try
- R(A);
- Vars
- R(f);OGATE,P_PINR(I),XS(H)::R(A)+B(D),DCHECK,XR(f)
- B(d);XP(G)::S(B),XB(d)
- S(a);N_GUARD,XR(A)::S(B),XP(b)
- S(a);N_GUARD,XQ(F)::S(B),XP(b)
- P(c);OGATE,XP(E)::QAB(F)
- S(a);N_GUARD::S(B),XP(b)
- S(e);N_GUARD::R1(I)
- S(e);N_GUARD::R1(I),XS(e)
- Refutation
- P(b);XR(A)
- Try
- Q(F);
- Vars
- R(f);OGATE,P_PINR(I),XS(H)::R(A)+B(D),DCHECK,XR(f)
- B(d);XP(G)::S(B),XB(d)
- P(c);OGATE,XP(E)::QAB(F)
- S(a);N_GUARD::S(B),XP(b)
- S(e);N_GUARD::R1(I)
- S(e);N_GUARD::R1(I),XS(e)
- Refutation
- P(c);
- Try
- Q(F);
- Vars
- R(f);OGATE,P_PINR(I),XS(H)::R(A)+B(D),DCHECK,XR(f)
- B(d);XP(G)::S(B),XB(d)
- P(c);OGATE,XP(E)::QAB(F)
- S(a);N_GUARD::S(B),XP(b)
- S(e);N_GUARD::R1(I)
- S(e);N_GUARD::R1(I),XS(e)
- Refutation
- P(c);
- Try
- Q(F);XP(c)
- Threat
- QAB(F)
- Vars
- R(f);OGATE,P_PINR(I),XS(H)::R(A)+B(D),DCHECK,XR(f)
- S(e);N_GUARD::R1(I),XS(e)
- S(e);N_GUARD::R1(I)
- Refutation
- P(h);XQ(F)
- Try
- P(E);XP(c)
- Vars
- R(f);OGATE,P_PINR(I),XS(H)::R(A)+B(D),DCHECK,XR(f)
- B(d);XP(G)::S(B),XB(d)
- S(a);N_GUARD,XQ(F)::S(B),XP(b)
- S(a);N_GUARD::S(B),XP(b)
- S(e);N_GUARD::R1(I)
- S(e);N_GUARD::R1(I),XS(e)
- Refutation
- P(h);XP(E)
- Try
- Actual
- R(I);
- Vars
- R(f);CHECK,SBLOCK,XS(H)::R(A)+B(D),DCHECK
- B(d);N_GUARD,XP(G)::S(H),XP(i)
- S(a);N_GUARD,XQ(F)::S(H),XP(b)
- P(c);OGATE,XP(E)::QAB(F),XP(c)
- S(a);N_GUARD::S(H),XP(b)
- S(e);N_GUARD::R1(I)
- S(e);N_GUARD::R1(I),XS(e)
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