MESON Chess Problem Database
Problem Display
PID: 2854 (1q6/3p2Pp/5P1K/p2B3N/P1n1R1p1/p1Pk1pP1/N2p1R2/1n1QB3 w - - 0 1)
von Duben, Gustaf Henrik
American Chess Monthly, 1892
#2
13 + 11
| 16 | Chess Amateur (The) | 1910 |
| 2638 | White to Play | 1913 |
| 15 | British Chess Magazine | 1918 |
| 2681 | All Change Here! | 1919 |
| 2185 | Sunday Chronicle | 1944 |
| 1099 | WCSC | 1995 |
| 259 | Thema Danicum | 1996 |
| 5396 | World Chess Solving Championship 1977-1996 | 1997 |
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxg3
- 2.Qxb1#
- 1...Qf4+
- 2.Sxf4#
- 1...Qe5
- 2.Qxb1#
- 1...Qd6
- 2.Qxb1#
- 1...Qa7
- 2.Sf4#
- 2.Qxb1#
- 1...Qc7
- 2.Qxb1#
- 1...Qb2
- 2.Sf4#
- 1...Qb3
- 2.Sf4#
- 1...Qb4
- 2.Sf4#
- 1...Qb5
- 2.Sf4#
- 1...Qb6
- 2.Sf4#
- 1...Qb7
- 2.Sf4#
- 1...Qa8
- 2.Sf4#
- 2.Qxb1#
- 1...Qc8
- 2.Sf4#
- 2.Qxb1#
- 1...Qd8
- 2.Sf4#
- 2.Qxb1#
- 1...Qe8
- 2.Sf4#
- 2.Qxb1#
- 1...Qf8
- 2.Sf4#
- 2.Qxb1#
- 1...Qg8
- 2.Sf4#
- 2.Qxb1#
- 1...Qh8
- 2.Sf4#
- 2.Qxb1#
- 1...Sxc3
- 2.Sc1#
- 1...Sb2
- 2.Qxb1#
- 1...Se3
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 1...Sb6
- 2.Qxb1#
- 1...Sd6
- 2.Sf4#
- 1...d6
- 2.Sf4#
- 1...Qxg3
- Tries
- 1.Bb7?
- threat
- 2.Qxb1#
- 1...Qf4+
- 2.Sxf4#
- 1...Sxc3
- 2.Sc1#
- 1...Se3
- 2.Rd4#
- 1...Qxb7!
- threat
- 1.Rf1?
- 1...Qf4+
- 2.Sxf4#
- 1...Qxg3
- 2.Qxb1#
- 1...Sxc3
- 2.Sc1#
- 1...Qe5
- 2.Qxb1#
- 1...Qd6
- 2.Qxb1#
- 1...Qa7
- 2.Sf4#
- 2.Qxb1#
- 1...Qc7
- 2.Qxb1#
- 1...Qb2
- 2.Sf4#
- 1...Qb3
- 2.Sf4#
- 1...Qb4
- 2.Sf4#
- 1...Qb5
- 2.Sf4#
- 1...Qb6
- 2.Sf4#
- 1...Qb7
- 2.Sf4#
- 1...Qa8
- 2.Sf4#
- 2.Qxb1#
- 1...Qc8
- 2.Sf4#
- 2.Qxb1#
- 1...Qd8
- 2.Sf4#
- 2.Qxb1#
- 1...Qe8
- 2.Sf4#
- 2.Qxb1#
- 1...Qf8
- 2.Sf4#
- 2.Qxb1#
- 1...Qg8
- 2.Sf4#
- 2.Qxb1#
- 1...Qh8
- 2.Sf4#
- 2.Qxb1#
- 1...Sb2
- 2.Qxb1#
- 1...Se3
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 1...Sb6
- 2.Qxb1#
- 1...Sd6
- 2.Sf4#
- 1...d6
- 2.Sf4#
- 1...f2!
- 1...Qf4+
- 1.Rfe2?
- threat
- 2.Bxc4#
- 2.Rd4#
- 1...Qf4+
- 2.Sxf4#
- 1...Sxc3
- 2.Sc1#
- 2.Bxc4#
- 1...Qe5
- 2.Bxc4#
- 2.Qxb1#
- 1...Qa7
- 2.Sf4#
- 2.Bxc4#
- 2.Qxb1#
- 1...Qc7
- 2.Rd4#
- 2.Qxb1#
- 1...Qb3
- 2.Sf4#
- 2.Rd4#
- 1...Qb4
- 2.Sf4#
- 2.Rd4#
- 1...Qb5
- 2.Sf4#
- 2.Rd4#
- 1...Qb6
- 2.Sf4#
- 2.Bxc4#
- 1...Qc8
- 2.Sf4#
- 2.Rd4#
- 2.Qxb1#
- 1...Qg8
- 2.Sf4#
- 2.Rd4#
- 2.Qxb1#
- 1...Sb2
- 2.R2e3#
- 2.R4e3#
- 2.Rd4#
- 2.Qxb1#
- 1...Se3
- 2.R2xe3#
- 2.R4xe3#
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 2.R2e3#
- 2.R4e3#
- 2.Rd4#
- 1...Sb6
- 2.R2e3#
- 2.R4e3#
- 2.Rd4#
- 2.Qxb1#
- 1...Sd6
- 2.Sf4#
- 2.R2e3#
- 2.R4e3#
- 2.Rd4#
- 1...fxe2!
- threat
- 1.Rh2?
- 1...Qf4+
- 2.Sxf4#
- 1...Qxg3
- 2.Qxb1#
- 1...Sxc3
- 2.Sc1#
- 1...Qe5
- 2.Qxb1#
- 1...Qd6
- 2.Qxb1#
- 1...Qa7
- 2.Sf4#
- 2.Qxb1#
- 1...Qc7
- 2.Qxb1#
- 1...Qb2
- 2.Sf4#
- 1...Qb3
- 2.Sf4#
- 1...Qb4
- 2.Sf4#
- 1...Qb5
- 2.Sf4#
- 1...Qb6
- 2.Sf4#
- 1...Qb7
- 2.Sf4#
- 1...Qa8
- 2.Sf4#
- 2.Qxb1#
- 1...Qc8
- 2.Sf4#
- 2.Qxb1#
- 1...Qd8
- 2.Sf4#
- 2.Qxb1#
- 1...Qe8
- 2.Sf4#
- 2.Qxb1#
- 1...Qf8
- 2.Sf4#
- 2.Qxb1#
- 1...Qg8
- 2.Sf4#
- 2.Qxb1#
- 1...Qh8
- 2.Sf4#
- 2.Qxb1#
- 1...Sb2
- 2.Qxb1#
- 1...Se3
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 1...Sb6
- 2.Qxb1#
- 1...Sd6
- 2.Sf4#
- 1...d6
- 2.Sf4#
- 1...f2!
- 1...Qf4+
- 1.Rxf3+?
- 1...Se3
- 2.Rfxe3#
- 2.Rexe3#
- 2.Rd4#
- 1...gxf3!
- 1...Se3
- 1.g8Q?
- 1...Qf4+
- 2.Sxf4#
- 1...Qxg3
- 2.Qxb1#
- 1...Qxg8
- 2.Sf4#
- 2.Qxb1#
- 1...Sxc3
- 2.Sc1#
- 1...Qe5
- 2.Qxb1#
- 1...Qd6
- 2.Qxb1#
- 1...Qa7
- 2.Sf4#
- 2.Qxb1#
- 1...Qc7
- 2.Qxb1#
- 1...Qb2
- 2.Sf4#
- 1...Qb3
- 2.Sf4#
- 1...Qb4
- 2.Sf4#
- 1...Qb5
- 2.Sf4#
- 1...Qb6
- 2.Sf4#
- 1...Qb7
- 2.Sf4#
- 1...Qa8
- 2.Sf4#
- 2.Qxb1#
- 1...Qc8
- 2.Sf4#
- 2.Qxb1#
- 1...Qd8
- 2.Sf4#
- 2.Qxb1#
- 1...Qe8
- 2.Sf4#
- 2.Qxb1#
- 1...Sb2
- 2.Qxb1#
- 1...Se3
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 1...Sb6
- 2.Qxb1#
- 1...Sd6
- 2.Sf4#
- 1...d6
- 2.Sf4#
- 1...Qf8+!
- 1...Qf4+
- 1.g8S?
- 1...Qf4+
- 2.Sxf4#
- 1...Qxg3
- 2.Qxb1#
- 1...Qxg8
- 2.Sf4#
- 2.Qxb1#
- 1...Sxc3
- 2.Sc1#
- 1...Qe5
- 2.Qxb1#
- 1...Qd6
- 2.Qxb1#
- 1...Qa7
- 2.Sf4#
- 2.Qxb1#
- 1...Qc7
- 2.Qxb1#
- 1...Qb2
- 2.Sf4#
- 1...Qb3
- 2.Sf4#
- 1...Qb4
- 2.Sf4#
- 1...Qb5
- 2.Sf4#
- 1...Qb6
- 2.Sf4#
- 1...Qb7
- 2.Sf4#
- 1...Qa8
- 2.Sf4#
- 2.Qxb1#
- 1...Qc8
- 2.Sf4#
- 2.Qxb1#
- 1...Qd8
- 2.Sf4#
- 2.Qxb1#
- 1...Qe8
- 2.Sf4#
- 2.Qxb1#
- 1...Sb2
- 2.Qxb1#
- 1...Se3
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 1...Sb6
- 2.Qxb1#
- 1...Sd6
- 2.Sf4#
- 1...d6
- 2.Sf4#
- 1...Qf8+!
- 1...Qf4+
- 1.g8B?
- 1...Qf4+
- 2.Sxf4#
- 1...Qxg3
- 2.Qxb1#
- 1...Qxg8
- 2.Sf4#
- 2.Qxb1#
- 1...Sxc3
- 2.Sc1#
- 1...Qe5
- 2.Qxb1#
- 1...Qd6
- 2.Qxb1#
- 1...Qa7
- 2.Sf4#
- 2.Qxb1#
- 1...Qc7
- 2.Qxb1#
- 1...Qb2
- 2.Sf4#
- 1...Qb3
- 2.Sf4#
- 1...Qb4
- 2.Sf4#
- 1...Qb5
- 2.Sf4#
- 1...Qb6
- 2.Sf4#
- 1...Qb7
- 2.Sf4#
- 1...Qa8
- 2.Sf4#
- 2.Qxb1#
- 1...Qc8
- 2.Sf4#
- 2.Qxb1#
- 1...Qd8
- 2.Sf4#
- 2.Qxb1#
- 1...Qe8
- 2.Sf4#
- 2.Qxb1#
- 1...Sb2
- 2.Qxb1#
- 1...Se3
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 1...Sb6
- 2.Qxb1#
- 1...Sd6
- 2.Sf4#
- 1...d6
- 2.Sf4#
- 1...Qf8+!
- 1...Qf4+
- 1.g8R?
- 1...Qf4+
- 2.Sxf4#
- 1...Qxg3
- 2.Qxb1#
- 1...Qxg8
- 2.Sf4#
- 2.Qxb1#
- 1...Sxc3
- 2.Sc1#
- 1...Qe5
- 2.Qxb1#
- 1...Qd6
- 2.Qxb1#
- 1...Qa7
- 2.Sf4#
- 2.Qxb1#
- 1...Qc7
- 2.Qxb1#
- 1...Qb2
- 2.Sf4#
- 1...Qb3
- 2.Sf4#
- 1...Qb4
- 2.Sf4#
- 1...Qb5
- 2.Sf4#
- 1...Qb6
- 2.Sf4#
- 1...Qb7
- 2.Sf4#
- 1...Qa8
- 2.Sf4#
- 2.Qxb1#
- 1...Qc8
- 2.Sf4#
- 2.Qxb1#
- 1...Qd8
- 2.Sf4#
- 2.Qxb1#
- 1...Qe8
- 2.Sf4#
- 2.Qxb1#
- 1...Sb2
- 2.Qxb1#
- 1...Se3
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 1...Sb6
- 2.Qxb1#
- 1...Sd6
- 2.Sf4#
- 1...d6
- 2.Sf4#
- 1...Qf8+!
- 1...Qf4+
- 1.Bb7?
- Keys
- 1.Qc1!
- 1...Qf4+
- 2.Sxf4#
- 1...dxc1Q+
- 2.Sxc1#
- 1...dxc1B+
- 2.Sxc1#
- 1...Qxg3
- 2.Qxb1#
- 1...Sxc3
- 2.Qxc3#
- 1...dxc1S
- 2.Sxc1#
- 1...dxc1R
- 2.Sxc1#
- 1...dxe1Q
- 2.Rd4#
- 2.Qc2#
- 1...dxe1S
- 2.Rd4#
- 1...dxe1B
- 2.Rd4#
- 2.Qc2#
- 1...dxe1R
- 2.Rd4#
- 2.Qc2#
- 1...d1Q
- 2.Rd4#
- 1...d1S
- 2.Rd4#
- 2.Qc2#
- 1...d1B
- 2.Rd4#
- 1...d1R
- 2.Rd4#
- 2.Qc2#
- 1...Qe5
- 2.Qxb1#
- 1...Qd6
- 2.Qxb1#
- 1...Qa7
- 2.Sf4#
- 2.Qxb1#
- 1...Qc7
- 2.Qxb1#
- 1...Qb2
- 2.Sf4#
- 1...Qb3
- 2.Sf4#
- 1...Qb4
- 2.Sf4#
- 1...Qb5
- 2.Sf4#
- 1...Qb6
- 2.Sf4#
- 1...Qb7
- 2.Sf4#
- 1...Qa8
- 2.Sf4#
- 2.Qxb1#
- 1...Qc8
- 2.Sf4#
- 2.Qxb1#
- 1...Qd8
- 2.Sf4#
- 2.Qxb1#
- 1...Qe8
- 2.Sf4#
- 2.Qxb1#
- 1...Qf8
- 2.Sf4#
- 2.Qxb1#
- 1...Qg8
- 2.Sf4#
- 2.Qxb1#
- 1...Qh8
- 2.Sf4#
- 2.Qxb1#
- 1...Sb2
- 2.Qxb1#
- 1...Se3
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 1...Sb6
- 2.Qxb1#
- 1...Sd6
- 2.Sf4#
- 1...d6
- 2.Sf4#
- 1...Qf4+
- 1.Qc1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- Q(k);N_GUARD,XP(F)::QAB(A),XS(a)
- Q(k);CHECK,N_GUARD::S(J),XQ(k)
- Q(k);N_GUARD::QAB(A),XS(a)
- Q(k);N_GUARD,P_PINP(K)::QAB(A),XS(a)
- Q(k);N_GUARD::S(J)
- Q(k);N_GUARD,P_PINP(K)::S(J)
- S(a);SBLOCK,XP(E)::S(C)
- S(f);S_CUTQ(k)::QAB(A),XS(a)
- S(f);SBLOCK::R1(H)
- S(f);S_CUTQ(k)::S(J)
- P(i);S_CUTQ(k)::S(J)
- Tries
- Try
- B(I);
- Threat
- QAB(A),XS(a)
- Vars
- Q(k);CHECK,N_GUARD::S(J),XQ(k)
- S(a);SBLOCK,XP(E)::S(C)
- S(f);SBLOCK::R1(H)
- Refutation
- Q(k);XB(I)
- Try
- R(D);
- Vars
- Q(k);CHECK,N_GUARD::S(J),XQ(k)
- Q(k);N_GUARD,XP(F)::QAB(A),XS(a)
- S(a);SBLOCK,XP(E)::S(C)
- Q(k);N_GUARD::QAB(A),XS(a)
- Q(k);N_GUARD,P_PINP(K)::QAB(A),XS(a)
- Q(k);N_GUARD::S(J)
- Q(k);N_GUARD,P_PINP(K)::S(J)
- S(f);S_CUTQ(k)::QAB(A),XS(a)
- S(f);SBLOCK::R1(H)
- S(f);S_CUTQ(k)::S(J)
- P(i);S_CUTQ(k)::S(J)
- Refutation
- P(e);
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- Q(k);CHECK,N_GUARD::S(J),XQ(k)
- Refutation
- P(e);XR(D)
- Try
- R(D);
- Vars
- Q(k);CHECK,N_GUARD::S(J),XQ(k)
- Q(k);N_GUARD,XP(F)::QAB(A),XS(a)
- S(a);SBLOCK,XP(E)::S(C)
- Q(k);N_GUARD::QAB(A),XS(a)
- Q(k);N_GUARD,P_PINP(K)::QAB(A),XS(a)
- Q(k);N_GUARD::S(J)
- Q(k);N_GUARD,P_PINP(K)::S(J)
- S(f);S_CUTQ(k)::QAB(A),XS(a)
- S(f);SBLOCK::R1(H)
- S(f);S_CUTQ(k)::S(J)
- P(i);S_CUTQ(k)::S(J)
- Refutation
- P(e);
- Try
- R(D);CHECK,XP(e)
- Refutation
- P(g);XR(D)
- Try
- P(M);
- Vars
- Q(k);CHECK,N_GUARD::S(J),XQ(k)
- Q(k);N_GUARD,XP(F)::QAB(A),XS(a)
- S(a);SBLOCK,XP(E)::S(C)
- Q(k);N_GUARD::QAB(A),XS(a)
- Q(k);N_GUARD,P_PINP(K)::QAB(A),XS(a)
- Q(k);N_GUARD::S(J)
- Q(k);N_GUARD,P_PINP(K)::S(J)
- S(f);S_CUTQ(k)::QAB(A),XS(a)
- S(f);SBLOCK::R1(H)
- S(f);S_CUTQ(k)::S(J)
- P(i);S_CUTQ(k)::S(J)
- Refutation
- Q(k);CHECK
- Try
- P(M);
- Vars
- Q(k);CHECK,N_GUARD::S(J),XQ(k)
- Q(k);N_GUARD,XP(F)::QAB(A),XS(a)
- S(a);SBLOCK,XP(E)::S(C)
- Q(k);N_GUARD::QAB(A),XS(a)
- Q(k);N_GUARD,P_PINP(K)::QAB(A),XS(a)
- Q(k);N_GUARD::S(J)
- Q(k);N_GUARD,P_PINP(K)::S(J)
- S(f);S_CUTQ(k)::QAB(A),XS(a)
- S(f);SBLOCK::R1(H)
- S(f);S_CUTQ(k)::S(J)
- P(i);S_CUTQ(k)::S(J)
- Refutation
- Q(k);CHECK
- Try
- P(M);
- Vars
- Q(k);CHECK,N_GUARD::S(J),XQ(k)
- Q(k);N_GUARD,XP(F)::QAB(A),XS(a)
- S(a);SBLOCK,XP(E)::S(C)
- Q(k);N_GUARD::QAB(A),XS(a)
- Q(k);N_GUARD,P_PINP(K)::QAB(A),XS(a)
- Q(k);N_GUARD::S(J)
- Q(k);N_GUARD,P_PINP(K)::S(J)
- S(f);S_CUTQ(k)::QAB(A),XS(a)
- S(f);SBLOCK::R1(H)
- S(f);S_CUTQ(k)::S(J)
- P(i);S_CUTQ(k)::S(J)
- Refutation
- Q(k);CHECK
- Try
- P(M);
- Vars
- Q(k);CHECK,N_GUARD::S(J),XQ(k)
- Q(k);N_GUARD,XP(F)::QAB(A),XS(a)
- S(a);SBLOCK,XP(E)::S(C)
- Q(k);N_GUARD::QAB(A),XS(a)
- Q(k);N_GUARD,P_PINP(K)::QAB(A),XS(a)
- Q(k);N_GUARD::S(J)
- Q(k);N_GUARD,P_PINP(K)::S(J)
- S(f);S_CUTQ(k)::QAB(A),XS(a)
- S(f);SBLOCK::R1(H)
- S(f);S_CUTQ(k)::S(J)
- P(i);S_CUTQ(k)::S(J)
- Refutation
- Q(k);CHECK
- Try
- Actual
- Q(A);N_PINP(b)
- Vars
- Q(k);CHECK,N_GUARD::S(J),XQ(k)
- P(b);CHECK,XQ(A)::S(C),XQ(b)
- P(b);CHECK,XQ(A)::S(C),XB(b)
- Q(k);N_GUARD,XP(F)::QAB(A),XS(a)
- S(a);OGATE,XP(E)::QAR1(A),XS(a)
- P(b);XQ(A)::S(C),XS(b)
- P(b);XQ(A)::S(C),XR(b)
- P(b);XB(B)::R1(H)
- P(b);::R1(H)
- Q(k);N_GUARD::QAB(A),XS(a)
- Q(k);N_GUARD,P_PINP(K)::QAB(A),XS(a)
- Q(k);N_GUARD::S(J)
- Q(k);N_GUARD,P_PINP(K)::S(J)
- S(f);S_CUTQ(k)::QAB(A),XS(a)
- S(f);SBLOCK::R1(H)
- S(f);S_CUTQ(k)::S(J)
- P(i);S_CUTQ(k)::S(J)
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).