MESON Chess Problem Database
Problem Display
PID: 21440 (6qn/8/8/4NB2/4P3/3pk2N/pQ2P2P/K3B2n w - - 0 1)
Promislo, Charles
2nd Prize, Boston Transcript, 1919
#2
9 + 6
| 3360 | Simple Two-move Themes | 1924 |
| 3680 | Jan Knoppel Udvalgte Skakproblemer | 1955 |
| 5064 | 100 Years of the American Two-move Chess Problem | 1962 |
| 5063 | Spectacular Chess Problems | 1965 |
| 5454 | Near Snap | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Qb3
- 2.Sg4#
- 1...Qc4
- 2.Sxc4#
- 2.Sg4#
- 1...Qd5
- 2.Sg4#
- 1...Qe6
- 2.Sg4#
- 1...Qf7
- 2.Sg4#
- 1...Qh7
- 2.Sc4#
- 2.Sg4#
- 1...Qg1
- 2.Sc4#
- 1...Qg2
- 2.Sc4#
- 1...Qg3
- 2.Sc4#
- 1...Qg4
- 2.Sc4#
- 2.Sxg4#
- 1...Qg5
- 2.Sc4#
- 1...Qg6
- 2.Sc4#
- 1...Qg7
- 2.Sc4#
- 1...Qa8
- 2.Sc4#
- 2.Sg4#
- 1...Qb8
- 2.Sc4#
- 2.Sg4#
- 1...Qc8
- 2.Sg4#
- 1...Qd8
- 2.Sc4#
- 2.Sg4#
- 1...Qe8
- 2.Sc4#
- 2.Sg4#
- 1...Qf8
- 2.Sc4#
- 2.Sg4#
- 1...Sf2
- 2.Bxf2#
- 1...Sg3
- 2.Bf2#
- 1...Sg6
- 2.Sg4#
- 1...Sf7
- 2.Sc4#
- 1...dxe2
- 2.Bd2#
- 2.Qc3#
- 2.Qd2#
- 2.Qb6#
- 1...d2
- 2.Qxd2#
- 1...Qb3
- Tries
- 1.Sf3?
- threat
- 2.Qd2#
- 1...dxe2
- 2.Qc3#
- 1...d2
- 2.Qxd2#
- 1...Qg7!
- threat
- 1.Sc6?
- threat
- 2.Qd2#
- 1...dxe2
- 2.Qc3#
- 1...d2
- 2.Qxd2#
- 1...Qg7!
- threat
- 1.Bc3?
- threat
- 2.Bd4#
- 2.Qd2#
- 1...d2
- 2.Qxd2#
- 1...Qc4
- 2.Sxc4#
- 2.Sg4#
- 2.Qd2#
- 1...Qd5
- 2.Sg4#
- 2.Qd2#
- 1...Qd8
- 2.Sc4#
- 2.Sg4#
- 2.Qd2#
- 1...Qg1+!
- threat
- 1.Bb4?
- threat
- 2.Bc5#
- 1...d2
- 2.Qxd2#
- 1...Qc4
- 2.Sxc4#
- 2.Sg4#
- 1...Qd5
- 2.Sg4#
- 1...Qc8
- 2.Sg4#
- 1...Qd8
- 2.Sc4#
- 2.Sg4#
- 1...Qf8
- 2.Sc4#
- 2.Sg4#
- 1...Qg1+!
- threat
- 1.Ba5?
- threat
- 2.Bb6#
- 1...d2
- 2.Qxd2#
- 1...Qb3
- 2.Sg4#
- 1...Qc4
- 2.Sxc4#
- 2.Sg4#
- 1...Qd5
- 2.Sg4#
- 1...Qe6
- 2.Sg4#
- 1...Qg6
- 2.Sc4#
- 1...Qb8
- 2.Sc4#
- 2.Sg4#
- 1...Qc8
- 2.Sg4#
- 1...Qd8
- 2.Sc4#
- 2.Sg4#
- 1...Qf8
- 2.Sc4#
- 2.Sg4#
- 1...Qg1+!
- threat
- 1.Qc1+?
- 1...Kd4
- 2.Sf3#
- 2.Sc6#
- 1...d2
- 2.Qxd2#
- 1...Kxe2!
- 1...Kd4
- 1.Sf3?
- Keys
- 1.Sf4!
- 1...Kxf4
- 2.Bd2#
- 1...dxe2
- 2.Qd2#
- 1...Qb3
- 2.Sg2#
- 1...Qc4
- 2.Sg2#
- 1...Qd5
- 2.Sg2#
- 2.Sxd5#
- 1...Qe6
- 2.Sg2#
- 1...Qf7
- 2.Sg2#
- 1...Qh7
- 2.Sg2#
- 2.Sd5#
- 1...Qg1
- 2.Sd5#
- 1...Qg2
- 2.Sxg2#
- 2.Sd5#
- 1...Qg3
- 2.Sd5#
- 1...Qg4
- 2.Sd5#
- 1...Qg5
- 2.Sd5#
- 1...Qg6
- 2.Sd5#
- 1...Qg7
- 2.Sd5#
- 1...Qa8
- 2.Sg2#
- 1...Qb8
- 2.Sg2#
- 2.Sd5#
- 1...Qc8
- 2.Sg2#
- 2.Sd5#
- 1...Qd8
- 2.Sg2#
- 1...Qe8
- 2.Sg2#
- 2.Sd5#
- 1...Qf8
- 2.Sg2#
- 2.Sd5#
- 1...Sf2
- 2.Bd2#
- 1...Sg3
- 2.Sg2#
- 1...Sg6
- 2.Sg2#
- 1...Sf7
- 2.Sd5#
- 1...d2
- 2.Qxd2#
- 1...Kxf4
- 1.Sf4!
This anticipates 17373(1946)
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 12
- ADDED MATES = 6
- REMOVED MATES = 3
- Sets
- Q(e);N_GUARD::S(H)
- Q(e);N_GUARD,P_PINB(B)::S(H)
- S(a);N_GUARD::B(B),XS(a)
- S(a);N_GUARD::B(B)
- S(f);S_CUTQ(e)::S(H)
- P(c);::QAB1(C),XP(c)
- Tries
- Try
- S(H);
- Threat
- QAB1(C)
- Vars
- P(c);OGATEB,SBLOCK,XP(D)::QAR2(C)
- P(c);::QAB1(C),XP(c)
- Refutation
- Q(e);P_PINQ(C)
- Try
- S(H);
- Threat
- QAB1(C)
- Vars
- P(c);OGATEB,SBLOCK,XP(D)::QAR2(C)
- P(c);::QAB1(C),XP(c)
- Refutation
- Q(e);P_PINQ(C)
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- P(c);::QAB1(C),XP(c)
- Refutation
- Q(e);CHECK
- Try
- B(B);
- Threat
- B(B)
- Vars
- P(c);::QAB1(C),XP(c)
- Q(e);N_GUARD::S(H)
- Refutation
- Q(e);CHECK
- Try
- B(B);
- Threat
- B(B)
- Vars
- P(c);::QAB1(C),XP(c)
- Q(e);N_GUARD::S(H)
- Refutation
- Q(e);CHECK
- Try
- Q(C);CHECK
- Vars
- P(c);P_SPINP(c)::QAB1(C),XP(c)
- Refutation
- K(d);P-FLIGHT,XP(D)
- Try
- Actual
- S(F);
- Vars
- K(d);S_FLIGHT,XS(F)::B(B)
- P(c);XP(D)::QAB1(C)
- Q(e);N_GUARD::S(F)
- Q(e);N_GUARD,P_PINB(B)::S(F)
- S(a);SBLOCK::B(B)
- S(a);S_CUTQ(e)::S(F)
- S(f);S_CUTQ(e)::S(F)
- P(c);::QAB1(C),XP(c)
Developed and maintained by Brian Stephenson.
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