MESON Chess Problem Database
Problem Display
PID: 52222 (8/8/N7/1R2Qp2/k1q2P1K/1R6/N7/8 w - - 0 1)
Fink, Adolf Jay
1st Prize, Good Companions (April Complete Blocks), 1921
#2
7 + 3
| 3132 | The Good Companion Two-Mover | 1922 |
| 81 | Chess | 1957 |
| 5064 | 100 Years of the American Two-move Chess Problem | 1962 |
| 6479 | Problemschach (Sidler) | 1968 |
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qe2
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qxb3
- 2.Ra5#
- 1...Qd3
- 2.Sc5#
- 2.R5b4#
- 1...Qxb5
- 2.Qxb5#
- 1...Qd5
- 2.Sc3#
- 1...Qe6
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qf7
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qg8
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qc1
- 2.R5b4#
- 1...Qc2
- 2.R5b4#
- 1...Qc3
- 2.Sxc3#
- 1...Qb4
- 2.R5xb4#
- 1...Qd4
- 2.Qxd4#
- 1...Qe4
- 2.Sc3#
- 2.Sc5#
- 1...Qxf4+
- 2.Qxf4#
- 1...Qc5
- 2.Sxc5#
- 1...Qc6
- 2.R5b4#
- 1...Qc7
- 2.R5b4#
- 1...Qc8
- 2.R5b4#
- 1...Qf1
- Tries
- 1.Kg5?
- 1...Qxf4+
- 2.Qxf4#
- 1...Qxb3
- 2.Ra5#
- 1...Qxb5
- 2.Qxb5#
- 1...Qb4
- 2.R5xb4#
- 1...Qf1
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qe2
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qd3
- 2.Sc5#
- 2.R5b4#
- 1...Qd5
- 2.Sc3#
- 1...Qe6
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qf7
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qc1
- 2.R5b4#
- 1...Qc2
- 2.R5b4#
- 1...Qc3
- 2.Sxc3#
- 1...Qd4
- 2.Qxd4#
- 1...Qe4
- 2.Sc3#
- 2.Sc5#
- 1...Qc5
- 2.Sxc5#
- 1...Qc6
- 2.R5b4#
- 1...Qc7
- 2.R5b4#
- 1...Qc8
- 2.R5b4#
- 1...Qg8+!
- 1...Qxf4+
- 1.Sc1?
- threat
- 2.Ra5#
- 2.Qa1#
- 1...Qxf4+
- 2.Qxf4#
- 1...Qxb3
- 2.Ra5#
- 1...Qxb5
- 2.Qa1#
- 2.Qxb5#
- 1...Qxc1
- 2.R5b4#
- 1...Qe2
- 2.Sc5#
- 2.R5b4#
- 2.Ra5#
- 1...Qd5
- 2.Qa1#
- 1...Qc2
- 2.R5b4#
- 2.Ra5#
- 1...Qb4
- 2.R5xb4#
- 1...Qd4
- 2.Ra5#
- 2.Qxd4#
- 1...Qc5
- 2.Sxc5#
- 1...Qc7
- 2.R5b4#
- 2.Qa1#
- 1...Qc3!
- threat
- 1.Sc7?
- 1...Qxf4+
- 2.Qxf4#
- 1...Qxb3
- 2.Ra5#
- 1...Qxb5
- 2.Qxb5#
- 1...Qxc7
- 2.R5b4#
- 1...Qb4
- 2.R5xb4#
- 1...Qf1
- 2.Sc3#
- 2.R5b4#
- 1...Qe2
- 2.Sc3#
- 2.R5b4#
- 1...Qd3
- 2.R5b4#
- 1...Qd5
- 2.Sc3#
- 1...Qe6
- 2.Sc3#
- 2.R5b4#
- 1...Qf7
- 2.Sc3#
- 2.R5b4#
- 1...Qg8
- 2.Sc3#
- 2.R5b4#
- 1...Qc1
- 2.R5b4#
- 1...Qc2
- 2.R5b4#
- 1...Qc3
- 2.Sxc3#
- 1...Qd4
- 2.Qxd4#
- 1...Qe4
- 2.Sc3#
- 1...Qc6
- 2.R5b4#
- 1...Qc5!
- 1...Qxf4+
- 1.Sb8?
- 1...Qxf4+
- 2.Qxf4#
- 1...Qxb3
- 2.Ra5#
- 1...Qxb5
- 2.Qxb5#
- 1...Qb4
- 2.R5xb4#
- 1...Qf1
- 2.Sc3#
- 2.R5b4#
- 1...Qe2
- 2.Sc3#
- 2.R5b4#
- 1...Qd3
- 2.R5b4#
- 1...Qd5
- 2.Sc3#
- 1...Qe6
- 2.Sc3#
- 2.R5b4#
- 1...Qf7
- 2.Sc3#
- 2.R5b4#
- 1...Qg8
- 2.Sc3#
- 2.R5b4#
- 1...Qc1
- 2.R5b4#
- 1...Qc2
- 2.R5b4#
- 1...Qc3
- 2.Sxc3#
- 1...Qd4
- 2.Qxd4#
- 1...Qe4
- 2.Sc3#
- 1...Qc6
- 2.R5b4#
- 1...Qc7
- 2.R5b4#
- 1...Qc8
- 2.R5b4#
- 1...Qc5!
- 1...Qxf4+
- 1.R3b4+?
- 1...Ka3
- 2.Ra5#
- 2.Qb2#
- 1...Qxb4!
- 1...Ka3
- 1.Qb2?
- threat
- 2.Ra3#
- 2.Qa3#
- 1...Qxb3
- 2.Qxb3#
- 1...Qb4
- 2.R3xb4#
- 1...Qc5
- 2.Sxc5#
- 1...Qd3
- 2.Sc5#
- 2.R3b4#
- 2.Qa3#
- 1...Qc1
- 2.Ra3#
- 2.R3b4#
- 1...Qc3
- 2.Sxc3#
- 2.Qa3#
- 1...Qxf4+!
- threat
- 1.Qc3?
- threat
- 2.Ra5#
- 2.Qa5#
- 2.Qxc4#
- 1...Qxb3
- 2.Ra5#
- 2.Qa5#
- 2.Qxb3#
- 1...Qxb5
- 2.Ra3#
- 1...Qxc3
- 2.Sxc3#
- 1...Qb4
- 2.R3xb4#
- 2.Qxb4#
- 1...Qc5
- 2.Sxc5#
- 2.Qa5#
- 1...Qf1
- 2.Sc5#
- 2.R3b4#
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qe2
- 2.Sc5#
- 2.R3b4#
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qd3
- 2.Sc5#
- 2.R3b4#
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qd5
- 2.R3b4#
- 2.Qb4#
- 2.Qa5#
- 1...Qe6
- 2.Sc5#
- 2.R3b4#
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qf7
- 2.Sc5#
- 2.R3b4#
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qg8
- 2.Sc5#
- 2.R3b4#
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qd4
- 2.Ra5#
- 2.Qxd4#
- 2.Qa5#
- 1...Qe4
- 2.Sc5#
- 2.Ra5#
- 2.Qa5#
- 1...Qc6
- 2.R3b4#
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qc7
- 2.R3b4#
- 2.Qb4#
- 1...Qc8
- 2.R3b4#
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qxf4+!
- threat
- 1.Qd4?
- threat
- 2.Sc3#
- 2.Sc5#
- 2.Qxc4#
- 1...Qb4
- 2.Qxb4#
- 1...Qxd4!
- threat
- 1.Qd6?
- threat
- 2.Qa3#
- 1...Qxf4+
- 2.Qxf4#
- 1...Qb4
- 2.Qxb4#
- 1...Qc5
- 2.Sxc5#
- 1...Qc1
- 2.Qb4#
- 1...Qxb3!
- threat
- 1.Qe4?
- threat
- 2.Sc3#
- 2.Sc5#
- 2.Qxc4#
- 1...Qxe4
- 2.Sc3#
- 2.Sc5#
- 1...Qb4
- 2.Qxb4#
- 1...Qd4
- 2.Sc3#
- 2.Sc5#
- 2.Qxd4#
- 1...fxe4!
- threat
- 1.Qc5?
- threat
- 2.Ra3#
- 2.Qa3#
- 2.Qxc4#
- 1...Qxb3
- 2.Ra5#
- 1...Qxb5
- 2.Ra3#
- 2.Qa3#
- 2.Qxb5#
- 1...Qxc5
- 2.Sxc5#
- 1...Qb4
- 2.R5xb4#
- 2.Qxb4#
- 1...Qf1
- 2.Sc3#
- 2.Ra3#
- 2.R5b4#
- 2.Qa3#
- 2.Qb4#
- 1...Qe2
- 2.Sc3#
- 2.Ra3#
- 2.R5b4#
- 2.Qa3#
- 2.Qb4#
- 1...Qd3
- 2.R5b4#
- 2.Qa3#
- 2.Qb4#
- 1...Qd5
- 2.Sc3#
- 2.Ra3#
- 2.R5b4#
- 2.Qa3#
- 2.Qb4#
- 1...Qe6
- 2.Sc3#
- 2.Ra3#
- 2.R5b4#
- 2.Qa3#
- 2.Qb4#
- 1...Qf7
- 2.Sc3#
- 2.Ra3#
- 2.R5b4#
- 2.Qa3#
- 2.Qb4#
- 1...Qg8
- 2.Sc3#
- 2.Ra3#
- 2.R5b4#
- 2.Qa3#
- 2.Qb4#
- 1...Qc1
- 2.R5b4#
- 2.Qb4#
- 1...Qc2
- 2.Ra3#
- 2.R5b4#
- 2.Qa3#
- 2.Qb4#
- 1...Qc3
- 2.Sxc3#
- 2.Qa3#
- 1...Qd4
- 2.Ra3#
- 2.Qa3#
- 2.Qxd4#
- 1...Qe4
- 2.Sc3#
- 2.Ra3#
- 2.Qa3#
- 1...Qxf4+!
- threat
- 1.Qd5?
- threat
- 2.Qxc4#
- 1...Qxb3
- 2.Ra5#
- 2.Qxb3#
- 1...Qxb5
- 2.Qxb5#
- 1...Qxd5
- 2.Sc3#
- 1...Qc5
- 2.Sxc5#
- 1...Qf1
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 2.Ra5#
- 1...Qe2
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 2.Ra5#
- 1...Qd3
- 2.Sc5#
- 2.R5b4#
- 2.Ra5#
- 1...Qc1
- 2.R5b4#
- 2.Ra5#
- 1...Qc2
- 2.R5b4#
- 2.Ra5#
- 1...Qc3
- 2.Sxc3#
- 1...Qb4
- 2.R5xb4#
- 1...Qd4
- 2.Ra5#
- 2.Qxd4#
- 1...Qe4
- 2.Sc3#
- 2.Sc5#
- 2.Ra5#
- 1...Qc6
- 2.R5b4#
- 2.Ra5#
- 1...Qc7
- 2.R5b4#
- 1...Qc8
- 2.R5b4#
- 2.Ra5#
- 1...Qxf4+!
- threat
- 1.Qxf5?
- 1...Qxf4+
- 2.Qxf4#
- 1...Qxb3
- 2.Ra5#
- 1...Qxb5
- 2.Qxb5#
- 1...Qb4
- 2.R5xb4#
- 1...Qc5
- 2.Sxc5#
- 1...Qf1
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qe2
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qd3
- 2.Sc5#
- 2.R5b4#
- 1...Qd5
- 2.Sc3#
- 1...Qe6
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qf7
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qg8
- 2.Sc3#
- 2.Sc5#
- 2.R5b4#
- 1...Qc1
- 2.R5b4#
- 1...Qc2
- 2.R5b4#
- 1...Qc3
- 2.Sxc3#
- 1...Qe4
- 2.Sc3#
- 2.Sc5#
- 2.Qxe4#
- 1...Qc6
- 2.R5b4#
- 1...Qc7
- 2.R5b4#
- 1...Qc8
- 2.R5b4#
- 1...Qd4!
- 1...Qxf4+
- 1.Kg5?
- Keys
- 1.Qe3!
- 1...Qxf4+
- 2.Qxf4#
- 1...Qxb3
- 2.Qxb3#
- 1...Qxb5
- 2.Ra3#
- 1...Qb4
- 2.R3xb4#
- 1...Qc5
- 2.Sxc5#
- 1...Qf1
- 2.Sc3#
- 2.Sc5#
- 2.R3b4#
- 1...Qe2
- 2.Sc3#
- 2.Sc5#
- 2.R3b4#
- 1...Qd3
- 2.Sc5#
- 1...Qd5
- 2.Sc3#
- 2.R3b4#
- 1...Qe6
- 2.Sc3#
- 2.Sc5#
- 2.R3b4#
- 1...Qf7
- 2.Sc3#
- 2.Sc5#
- 2.R3b4#
- 1...Qg8
- 2.Sc3#
- 2.Sc5#
- 2.R3b4#
- 1...Qc1
- 2.R3b4#
- 1...Qc2
- 2.R3b4#
- 1...Qc3
- 2.Sxc3#
- 1...Qd4
- 2.Qxd4#
- 1...Qe4
- 2.Sc3#
- 2.Sc5#
- 1...Qc6
- 2.R3b4#
- 1...Qc7
- 2.R3b4#
- 1...Qc8
- 2.R3b4#
- 1...Qxf4+
- 1.Qe3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- Q(b);N_PINP(C),SBLOCK,XR(B)::R1(E)
- Q(b);N_PINP(C),OGATE,XR(E)::QAB1(F),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::S(A)
- Q(b);N_GUARD,N_PINP(C)::R1(E)
- Q(b);N_GUARD,N_PINP(C)::S(A),XQ(b)
- Q(b);N_GUARD::R1(E),XQ(b)
- Q(b);OGATEB::QAR(F),XQ(b)
- Q(b);CHECK,OGATE,XP(C)::QAR(F),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::S(G),XQ(b)
- Tries
- Try
- K(D);N_SPINP(C),S_FLIGHT
- Vars
- Q(b);CHECK,OGATE,XP(C)::QAR(F),XQ(b)
- Q(b);SBLOCK,XR(B)::R1(E)
- Q(b);OGATE,XR(E)::QAB1(F),XQ(b)
- Q(b);N_GUARD::R1(E),XQ(b)
- Q(b);N_GUARD::S(A)
- Q(b);N_GUARD,P_PINP(C)::R1(E)
- Q(b);N_GUARD::R1(E)
- Q(b);N_GUARD::S(A),XQ(b)
- Q(b);OGATEB::QAR(F),XQ(b)
- Q(b);N_GUARD::S(G),XQ(b)
- Refutation
- Q(b);CHECK
- Try
- S(A);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,OGATE,XP(C)::QAR(F),XQ(b)
- Q(b);N_PINP(C),XR(B)::R1(E)
- Q(b);N_GUARD,N_PINP(C),XS(A)::R1(E)
- Q(b);N_PINP(C)::QAR(F)
- Q(b);N_GUARD::R1(E),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::S(G),XQ(b)
- Refutation
- Q(b);N_PINP(C)
- Try
- S(G);
- Vars
- Q(b);CHECK,OGATE,XP(C)::QAR(F),XQ(b)
- Q(b);N_PINP(C),SBLOCK,XR(B)::R1(E)
- Q(b);N_PINP(C),OGATE,XR(E)::QAB1(F),XQ(b)
- Q(b);N_GUARD,N_PINP(C),XS(G)::R1(E)
- Q(b);N_GUARD::R1(E),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::R1(E)
- Q(b);N_GUARD,N_PINP(C)::S(A)
- Q(b);N_GUARD,N_PINP(C)::S(A),XQ(b)
- Q(b);OGATEB::QAR(F),XQ(b)
- Q(b);N_GUARD::S(A)
- Refutation
- Q(b);N_PINP(C)
- Try
- S(G);
- Vars
- Q(b);CHECK,OGATE,XP(C)::QAR(F),XQ(b)
- Q(b);N_PINP(C),SBLOCK,XR(B)::R1(E)
- Q(b);N_PINP(C),OGATE,XR(E)::QAB1(F),XQ(b)
- Q(b);N_GUARD::R1(E),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::R1(E)
- Q(b);N_GUARD,N_PINP(C)::S(A)
- Q(b);N_GUARD,N_PINP(C)::S(A),XQ(b)
- Q(b);OGATEB::QAR(F),XQ(b)
- Q(b);N_GUARD::S(A)
- Refutation
- Q(b);N_PINP(C)
- Try
- R(B);CHECK
- Refutation
- Q(b);XR(B)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(b);N_PINP(C),OGATE,XR(B)::QAB1(F),XQ(b)
- Q(b);N_GUARD::R1(B),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::S(G),XQ(b)
- Refutation
- Q(b);CHECK,XP(C)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- Q(b);N_PINP(C),SBLOCK,XR(E)::R1(B)
- Q(b);N_PINP(C),XQ(F)::S(A),XQ(b)
- Refutation
- Q(b);CHECK,XP(C)
- Try
- Q(F);N_SPINP(C),P_PINQ(b)
- Threat
- DUALS(3)
- Vars
- Q(b);OGATE::QAR1(F),XQ(b)
- Refutation
- Q(b);N_SPINQ(b),P_PINP(C),XQ(F)
- Try
- Q(F);
- Threat
- QAR1(F)
- Vars
- Q(b);CHECK,OGATE,XP(C)::QAR(F),XQ(b)
- Q(b);N_GUARD::QAR1(F),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::S(G),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::QAR1(F)
- Refutation
- Q(b);N_PINP(C),XR(B)
- Try
- Q(F);N_SPINP(C),P_PINQ(b)
- Threat
- DUALS(3)
- Vars
- Q(b);OGATE::QAR1(F),XQ(b)
- Refutation
- P(c);N_SPINQ(b),XQ(F)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- Q(b);N_PINP(C),SBLOCK,XR(B)::R1(E)
- Q(b);N_PINP(C),XQ(F)::S(G),XQ(b)
- Refutation
- Q(b);CHECK,XP(C)
- Try
- Q(F);
- Threat
- QAR2(F),XQ(b)
- Vars
- Q(b);N_PINP(C),OGATE,XR(E)::QAB1(F),XQ(b)
- Q(b);N_GUARD,N_PINP(C),XQ(F)::S(A)
- Q(b);N_GUARD,N_PINP(C)::S(G),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::S(A),XQ(b)
- Q(b);N_GUARD::R1(E),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::R1(E)
- Refutation
- Q(b);CHECK,XP(C)
- Try
- Q(F);XP(c)
- Vars
- Q(b);CHECK,OGATE,XP(C)::QAR(F),XQ(b)
- Q(b);N_PINP(C),SBLOCK,XR(B)::R1(E)
- Q(b);N_PINP(C),OGATE,XR(E)::QAB1(F),XQ(b)
- Q(b);N_GUARD::R1(E),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::S(G),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::S(A)
- Q(b);N_GUARD,N_PINP(C)::R1(E)
- Q(b);N_GUARD,N_PINP(C)::S(A),XQ(b)
- Refutation
- Q(b);
- Try
- Actual
- Q(F);
- Vars
- Q(b);CHECK,OGATE,XP(C)::QAR(F),XQ(b)
- Q(b);N_PINP(C),OGATE,XR(B)::QAB1(F),XQ(b)
- Q(b);N_PINP(C),SBLOCK,XR(E)::R1(B)
- Q(b);N_GUARD::R1(B),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::S(G),XQ(b)
- Q(b);N_GUARD,N_PINP(C)::S(G)
- Q(b);N_GUARD,N_PINP(C)::R1(B)
- Q(b);N_GUARD,N_PINP(C)::S(A),XQ(b)
- Q(b);OGATEB::QAR(F),XQ(b)
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).