MESON Chess Problem Database
Problem Display
PID: 258882 (B7/1R1pr2p/4n3/3q1p2/pQ3B1K/5kpN/4nr1R/5N2 w - - 0 1)
Swane, Jan Arnold Willem
Probleemblad, 1948
#2
8 + 11
SOLUTION
- SOUND
- Sets
- 1...Qb3
- 2.Sd2#
- 1...Qc4
- 2.Sd2#
- 1...Qe4
- 2.Sd2#
- 1...Qc6
- 2.Sd2#
- 1...Qxb7
- 2.Sd2#
- 1...Qd2
- 2.Sxd2#
- 1...Qa5
- 2.Sd2#
- 1...Qb5
- 2.Sd2#
- 1...Qc5
- 2.Sd2#
- 1...Qe5
- 2.Sd2#
- 1...Sc1
- 2.Sg1#
- 1...Sg1
- 2.Sxg1#
- 1...Sc3
- 2.Sg1#
- 1...S2xf4
- 2.Sg1#
- 1...Sd4
- 2.Sd2#
- 1...S6xf4
- 2.Sg5#
- 1...Sc5
- 2.Sg5#
- 1...Sg5
- 2.Sxg5#
- 1...Sc7
- 2.Sg5#
- 1...Sg7
- 2.Sg5#
- 1...Sd8
- 2.Sg5#
- 1...Sf8
- 2.Sg5#
- 1...Qb3
- Tries
- 1.Rb5?
- threat
- 2.Sd2#
- 2.Bxd5#
- 1...Qxa8
- 2.Sd2#
- 1...Rxf1
- 2.Bxd5#
- 1...Rxh2
- 2.Bxd5#
- 1...S2xf4
- 2.Sg1#
- 1...S6xf4
- 2.Sg5#
- 1...gxh2
- 2.Bxd5#
- 1...Sc1
- 2.Sg1#
- 1...Sg1
- 2.Sxg1#
- 1...Sc3
- 2.Sg1#
- 1...S6d4
- 2.Sd2#
- 1...Qe4
- 2.Sd2#
- 1...Qc6
- 2.Sd2#
- 1...Qb7
- 2.Sd2#
- 1...Sc5
- 2.Sd2#
- 2.Sg5#
- 1...Sg5
- 2.Sd2#
- 2.Sxg5#
- 1...Sc7
- 2.Sd2#
- 2.Sg5#
- 1...Sg7
- 2.Sd2#
- 2.Sg5#
- 1...Sd8
- 2.Sd2#
- 2.Sg5#
- 1...Sf8
- 2.Sd2#
- 2.Sg5#
- 1...S2d4!
- threat
- 1.Rb6?
- threat
- 2.Sd2#
- 2.Bxd5#
- 1...Qxa8
- 2.Sd2#
- 1...Rxf1
- 2.Bxd5#
- 1...Rxh2
- 2.Bxd5#
- 1...S2xf4
- 2.Sg1#
- 1...S6xf4
- 2.Sg5#
- 1...gxh2
- 2.Bxd5#
- 1...Sc1
- 2.Sg1#
- 1...Sg1
- 2.Sxg1#
- 1...Sc3
- 2.Sg1#
- 1...S6d4
- 2.Sd2#
- 1...Qe4
- 2.Sd2#
- 1...Qc6
- 2.Sd2#
- 1...Qb7
- 2.Sd2#
- 1...Sc5
- 2.Sd2#
- 2.Sg5#
- 1...Sg5
- 2.Sd2#
- 2.Sxg5#
- 1...Sc7
- 2.Sd2#
- 2.Sg5#
- 1...Sg7
- 2.Sd2#
- 2.Sg5#
- 1...Sd8
- 2.Sd2#
- 2.Sg5#
- 1...Sf8
- 2.Sd2#
- 2.Sg5#
- 1...S2d4!
- threat
- 1.Ra7?
- threat
- 2.Sd2#
- 2.Bxd5#
- 1...Qxa8
- 2.Sd2#
- 1...Rxf1
- 2.Bxd5#
- 1...Rxh2
- 2.Bxd5#
- 1...S2xf4
- 2.Sg1#
- 1...S6xf4
- 2.Sg5#
- 1...gxh2
- 2.Bxd5#
- 1...Sc1
- 2.Sg1#
- 1...Sg1
- 2.Sxg1#
- 1...Sc3
- 2.Sg1#
- 1...S6d4
- 2.Sd2#
- 1...Qe4
- 2.Sd2#
- 1...Qc6
- 2.Sd2#
- 1...Qb7
- 2.Sd2#
- 1...Sc5
- 2.Sd2#
- 2.Sg5#
- 1...Sg5
- 2.Sd2#
- 2.Sxg5#
- 1...Sc7
- 2.Sd2#
- 2.Sg5#
- 1...Sg7
- 2.Sd2#
- 2.Sg5#
- 1...Sd8
- 2.Sd2#
- 2.Sg5#
- 1...Sf8
- 2.Sd2#
- 2.Sg5#
- 1...S2d4!
- threat
- 1.Rc7?
- threat
- 2.Sd2#
- 2.Bxd5#
- 1...Qxa8
- 2.Sd2#
- 1...Rxf1
- 2.Bxd5#
- 1...Rxh2
- 2.Bxd5#
- 1...S2xf4
- 2.Sg1#
- 1...S6xf4
- 2.Sg5#
- 1...Sxc7
- 2.Sd2#
- 2.Sg5#
- 1...gxh2
- 2.Bxd5#
- 1...Sc1
- 2.Sg1#
- 1...Sg1
- 2.Sxg1#
- 1...Sc3
- 2.Sg1#
- 1...S6d4
- 2.Sd2#
- 1...Qe4
- 2.Sd2#
- 1...Qc6
- 2.Sd2#
- 1...Qb7
- 2.Sd2#
- 1...Sc5
- 2.Sd2#
- 2.Sg5#
- 1...Sg5
- 2.Sd2#
- 2.Sxg5#
- 1...Sg7
- 2.Sd2#
- 2.Sg5#
- 1...Sd8
- 2.Sd2#
- 2.Sg5#
- 1...Sf8
- 2.Sd2#
- 2.Sg5#
- 1...S2d4!
- threat
- 1.Rxd7?
- threat
- 2.Sd2#
- 2.Bxd5#
- 1...Qxa8
- 2.Sd2#
- 2.Rd3#
- 1...Rxf1
- 2.Bxd5#
- 1...Rxh2
- 2.Bxd5#
- 1...Rxd7
- 2.Sd2#
- 1...S2xf4
- 2.Sg1#
- 1...S6xf4
- 2.Sg5#
- 1...gxh2
- 2.Bxd5#
- 1...Sc1
- 2.Sg1#
- 1...Sg1
- 2.Sxg1#
- 1...Sc3
- 2.Sg1#
- 1...S6d4
- 2.Sd2#
- 1...Qe4
- 2.Sd2#
- 2.Rd3#
- 1...Qc6
- 2.Sd2#
- 2.Bxc6#
- 2.Rd3#
- 1...Qb7
- 2.Sd2#
- 2.Bxb7#
- 2.Rd3#
- 2.Qxb7#
- 1...Sc5
- 2.Sd2#
- 2.Sg5#
- 1...Sg5
- 2.Sd2#
- 2.Sxg5#
- 1...Sc7
- 2.Sd2#
- 2.Sg5#
- 1...Sg7
- 2.Sd2#
- 2.Sg5#
- 1...Sd8
- 2.Sd2#
- 2.Sg5#
- 1...Sf8
- 2.Sd2#
- 2.Sg5#
- 1...S2d4!
- threat
- 1.Rb8?
- threat
- 2.Sd2#
- 2.Bxd5#
- 1...Qxa8
- 2.Sd2#
- 1...Rxf1
- 2.Bxd5#
- 1...Rxh2
- 2.Bxd5#
- 1...S2xf4
- 2.Sg1#
- 1...S6xf4
- 2.Sg5#
- 1...gxh2
- 2.Bxd5#
- 1...Sc1
- 2.Sg1#
- 1...Sg1
- 2.Sxg1#
- 1...Sc3
- 2.Sg1#
- 1...S6d4
- 2.Sd2#
- 1...Qe4
- 2.Sd2#
- 1...Qc6
- 2.Sd2#
- 1...Qb7
- 2.Sd2#
- 1...Sc5
- 2.Sd2#
- 2.Sg5#
- 1...Sg5
- 2.Sd2#
- 2.Sxg5#
- 1...Sc7
- 2.Sd2#
- 2.Sg5#
- 1...Sg7
- 2.Sd2#
- 2.Sg5#
- 1...Sd8
- 2.Sd2#
- 2.Sg5#
- 1...Sf8
- 2.Sd2#
- 2.Sg5#
- 1...S2d4!
- threat
- 1.Qd2?
- threat
- 2.Qe3#
- 2.Qxd5#
- 1...Ke4
- 2.Qe3#
- 1...Qxb7
- 2.Qe3#
- 2.Qd3#
- 1...Qxd2
- 2.Sxd2#
- 2.Rb3#
- 1...Rxh2
- 2.Qxd5#
- 1...S2xf4
- 2.Qe3#
- 1...S6xf4
- 2.Sg5#
- 1...gxh2
- 2.Qxd5#
- 1...Qa2
- 2.Rb3#
- 2.Qe3#
- 2.Qd3#
- 1...Qb3
- 2.Rxb3#
- 1...Qc4
- 2.Rb3#
- 2.Qe3#
- 1...Qc6
- 2.Qe3#
- 2.Qd3#
- 1...Qd3
- 2.Qxd3#
- 1...Qd4
- 2.Rb3#
- 1...Qa5
- 2.Rb3#
- 2.Qe3#
- 2.Qd3#
- 1...Qb5
- 2.Qe3#
- 1...Qc5
- 2.Rb3#
- 1...Qe5
- 2.Rb3#
- 1...Qd6
- 2.Rb3#
- 2.Qe3#
- 1...Sc1
- 2.Qe3#
- 1...Sg1
- 2.Qe3#
- 1...Sc3
- 2.Qe3#
- 1...S2d4
- 2.Qe3#
- 2.Qd3#
- 1...S6d4
- 2.Sg5#
- 1...Sc5
- 2.Sg5#
- 1...Sg5
- 2.Sxg5#
- 1...Sc7
- 2.Sg5#
- 1...Sg7
- 2.Sg5#
- 1...Sd8
- 2.Sg5#
- 1...Sf8
- 2.Sg5#
- 1...Qe4!
- threat
- 1.Qa3+?
- 1...Ke4
- 2.Qe3#
- 1...Qb3
- 2.Sd2#
- 2.Rxb3#
- 2.Rxd7#
- 1...Qd3
- 2.Sd2#
- 2.Rxd7#
- 2.Qxd3#
- 1...Sc3!
- 1...Ke4
- 1.Qc3+?
- 1...Ke4
- 2.Qe3#
- 1...Qd3
- 2.Sd2#
- 2.Rxd7#
- 2.Qxd3#
- 1...Sxc3!
- 1...Ke4
- 1.Qd4?
- threat
- 2.Sd2#
- 2.Qe3#
- 2.Qxd5#
- 1...Qxb7
- 2.Sd2#
- 2.Qe3#
- 2.Qd3#
- 1...Qxd4
- 2.Rb3#
- 1...Rxf1
- 2.Qe3#
- 2.Qxd5#
- 1...Rxh2
- 2.Qxd5#
- 1...S2xf4
- 2.Sg1#
- 2.Qe3#
- 1...S6xd4
- 2.Sd2#
- 1...S6xf4
- 2.Sd2#
- 2.Sg5#
- 1...gxh2
- 2.Qxd5#
- 1...Sc1
- 2.Sg1#
- 2.Qe3#
- 1...Sg1
- 2.Sxg1#
- 2.Qe3#
- 1...Sc3
- 2.Sg1#
- 2.Qe3#
- 1...Qa2
- 2.Rb3#
- 2.Qe3#
- 2.Qd3#
- 1...Qb3
- 2.Sd2#
- 2.Rxb3#
- 1...Qc4
- 2.Sd2#
- 2.Rb3#
- 2.Qe3#
- 1...Qe4
- 2.Sd2#
- 1...Qc6
- 2.Sd2#
- 2.Qe3#
- 2.Qd3#
- 1...Qa5
- 2.Rb3#
- 2.Qe3#
- 2.Qd3#
- 1...Qb5
- 2.Sd2#
- 2.Qe3#
- 1...Qc5
- 2.Sd2#
- 2.Rb3#
- 1...Qe5
- 2.Sd2#
- 2.Rb3#
- 1...Qd6
- 2.Sd2#
- 2.Rb3#
- 2.Qe3#
- 1...Sc5
- 2.Sd2#
- 2.Sg5#
- 1...Sg5
- 2.Sd2#
- 2.Sxg5#
- 1...Sc7
- 2.Sd2#
- 2.Sg5#
- 1...Sg7
- 2.Sd2#
- 2.Sg5#
- 1...Sd8
- 2.Sd2#
- 2.Sg5#
- 1...Sf8
- 2.Sd2#
- 2.Sg5#
- 1...S2xd4!
- threat
- 1.Rb5?
- Keys
- 1.Qc4!
- threat
- 2.Qxd5#
- 1...Qxc4
- 2.Sd2#
- 2.Rb3#
- 1...Qxb7
- 2.Sd2#
- 2.Qd3#
- 1...S2xf4
- 2.Sg1#
- 1...S6xf4
- 2.Sg5#
- 1...Qd4
- 2.Rb3#
- 1...S2d4
- 2.Qd3#
- 1...S6d4
- 2.Sd2#
- 1...Sc3
- 2.Sg1#
- 1...Qe4
- 2.Sd2#
- 1...Qc6
- 2.Sd2#
- 2.Qd3#
- 1...Qd1
- 2.Rb3#
- 1...Qd2
- 2.Sxd2#
- 2.Rb3#
- 1...Qd3
- 2.Qxd3#
- 1...Qa5
- 2.Rb3#
- 2.Qd3#
- 1...Qb5
- 2.Sd2#
- 1...Qc5
- 2.Sd2#
- 2.Rb3#
- 1...Qe5
- 2.Sd2#
- 2.Rb3#
- 1...Qd6
- 2.Rb3#
- 1...Sc1
- 2.Sg1#
- 1...Sg1
- 2.Sxg1#
- 1...Sc5
- 2.Sg5#
- 1...Sg5
- 2.Sxg5#
- 1...Sc7
- 2.Sg5#
- 1...Sg7
- 2.Sg5#
- 1...Sd8
- 2.Sg5#
- 1...Sf8
- 2.Sg5#
- threat
- 1.Qc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 8
- Sets
- Q(f);N_GUARD::S(A)
- Q(f);N_GUARD,P_PINB(E)::S(A)
- Q(f);N_GUARD,P_SPINQ(f),XR(G)::S(A)
- Q(f);N_GUARD::S(A),XQ(f)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(a);N_GUARD,XB(E)::S(C)
- S(h);S_CUTQ(f)::S(A)
- S(h);N_GUARD,XB(E)::S(C)
- S(h);N_GUARD::S(C)
- S(h);N_GUARD::S(C),XS(h)
- Tries
- Try
- R(G);P_PINQ(f)
- Threat
- DUALS(2)
- Vars
- Q(f);N_SPINQ(f),XB(H)::S(A)
- R(b);XS(A)::B(H),XQ(f)
- R(b);P_PINS(C),XR(B)::B(H),XQ(f)
- S(a);N_GUARD,XB(E)::S(C)
- S(h);N_GUARD,XB(E)::S(C)
- P(d);XR(B)::B(H),XQ(f)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(h);::S(A)
- Q(f);P_PINB(E)::S(A)
- Q(f);::S(A)
- Refutation
- S(a);
- Try
- R(G);P_PINQ(f)
- Threat
- DUALS(2)
- Vars
- Q(f);N_SPINQ(f),XB(H)::S(A)
- R(b);XS(A)::B(H),XQ(f)
- R(b);P_PINS(C),XR(B)::B(H),XQ(f)
- S(a);N_GUARD,XB(E)::S(C)
- S(h);N_GUARD,XB(E)::S(C)
- P(d);XR(B)::B(H),XQ(f)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(h);::S(A)
- Q(f);P_PINB(E)::S(A)
- Q(f);::S(A)
- Refutation
- S(a);
- Try
- R(G);P_PINQ(f)
- Threat
- DUALS(2)
- Vars
- Q(f);N_SPINQ(f),XB(H)::S(A)
- R(b);XS(A)::B(H),XQ(f)
- R(b);P_PINS(C),XR(B)::B(H),XQ(f)
- S(a);N_GUARD,XB(E)::S(C)
- S(h);N_GUARD,XB(E)::S(C)
- P(d);XR(B)::B(H),XQ(f)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(h);::S(A)
- Q(f);P_PINB(E)::S(A)
- Q(f);::S(A)
- Refutation
- S(a);
- Try
- R(G);P_PINQ(f)
- Threat
- DUALS(2)
- Vars
- Q(f);N_SPINQ(f),XB(H)::S(A)
- R(b);XS(A)::B(H),XQ(f)
- R(b);P_PINS(C),XR(B)::B(H),XQ(f)
- S(a);N_GUARD,XB(E)::S(C)
- S(h);N_GUARD,XB(E)::S(C)
- P(d);XR(B)::B(H),XQ(f)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(h);::S(A)
- Q(f);P_PINB(E)::S(A)
- Q(f);::S(A)
- Refutation
- S(a);
- Try
- R(G);P_PINQ(f),XP(i)
- Threat
- DUALS(2)
- Vars
- R(b);XS(A)::B(H),XQ(f)
- R(b);P_PINS(C),XR(B)::B(H),XQ(f)
- R(j);XR(G)::S(A)
- S(a);N_GUARD,XB(E)::S(C)
- S(h);N_GUARD,XB(E)::S(C)
- P(d);XR(B)::B(H),XQ(f)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(h);::S(A)
- Refutation
- S(a);
- Try
- R(G);P_PINQ(f)
- Threat
- DUALS(2)
- Vars
- Q(f);N_SPINQ(f),XB(H)::S(A)
- R(b);XS(A)::B(H),XQ(f)
- R(b);P_PINS(C),XR(B)::B(H),XQ(f)
- S(a);N_GUARD,XB(E)::S(C)
- S(h);N_GUARD,XB(E)::S(C)
- P(d);XR(B)::B(H),XQ(f)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(h);::S(A)
- Q(f);P_PINB(E)::S(A)
- Q(f);::S(A)
- Refutation
- S(a);
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- K(c);S_FLIGHT::QAR1(D)
- R(b);P_PINS(C),XR(B)::QAB(D),XQ(f)
- S(a);XB(E)::QAR1(D)
- S(h);N_GUARD,XB(E)::S(C)
- P(d);XR(B)::QAB(D),XQ(f)
- Q(f);::B(H)+R(G),DCHECK,XQ(f)
- Q(f);N_GUARD::QAR2(D),XQ(f)
- Q(f);P_PINB(E)::B(H)+R(G),DCHECK
- Q(f);::QAR1(D)
- Q(f);::B(H)+R(G),DCHECK
- S(a);::QAR1(D)
- S(h);N_GUARD::S(C)
- S(h);N_GUARD::S(C),XS(h)
- Refutation
- Q(f);P_PINB(E)
- Try
- Q(D);CHECK
- Vars
- K(c);S_FLIGHT::QAR1(D)
- Refutation
- S(a);P_SPINS(a)
- Try
- Q(D);CHECK
- Vars
- K(c);S_FLIGHT::QAR1(D)
- Refutation
- S(a);XQ(D)
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- Q(f);P_PINB(E),XQ(D)::B(H)+R(G),DCHECK
- R(b);P_PINS(C),XR(B)::QAB(D),XQ(f)
- S(h);XQ(D)::S(A)
- P(d);XR(B)::QAB(D),XQ(f)
- Q(f);P_PINB(E)::S(A)
- Refutation
- S(a);XQ(D)
- Try
- Actual
- Q(D);
- Threat
- QAB(D),XQ(f)
- Vars
- S(a);N_GUARD,XB(E)::S(C)
- S(h);N_GUARD,XB(E)::S(C)
- Q(f);P_PINB(E)::B(H)+R(G),DCHECK
- S(a);S_CUTQ(f)::QAR2(D)
- S(h);S_CUTQ(f)::S(A)
- S(a);N_GUARD::S(C)
- Q(f);N_GUARD,P_PINB(E)::S(A)
- Q(f);::B(H)+R(G),DCHECK
- Q(f);N_GUARD::QAR2(D),XQ(f)
- Q(f);N_GUARD::S(A)
- S(a);N_GUARD::S(C),XS(a)
- S(h);N_GUARD::S(C)
- S(h);N_GUARD::S(C),XS(h)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).