MESON Chess Problem Database
Problem Display
PID: 21439 (b1K3R1/pn3k1B/P1n1RB1q/1NQ5/3N3p/4p2P/4P3/8 w - - 0 1)
Promislo, Charles
1st Prize, Boston Transcript, 1919
#2
11 + 8
| 3360 | Simple Two-move Themes | 1924 |
| 887 | Mate in Two Moves | 1931 |
| 268 | Chess Life | 1958 |
| 56 | The Problemist | 1980 |
SOLUTION
- SOUND
- Sets
- 1...Qf4
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 2.Qh5#
- 1...Qg5
- 2.Rf8#
- 2.Qf8#
- 1...Qg7
- 2.Rxg7#
- 1...Qf8+
- 2.Rxf8#
- 2.Qxf8#
- 1...Qh5
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 2.Qxh5#
- 1...Qxf6
- 2.Qf8#
- 1...Qg6
- 2.Rf8#
- 2.Qf8#
- 1...Qxh7
- 2.Qf8#
- 1...Sb4
- 2.Qe7#
- 2.Qc7#
- 1...Sxd4
- 2.Qe7#
- 1...Sca5
- 2.Qe7#
- 2.Qc7#
- 1...Se5
- 2.Qe7#
- 1...Se7+
- 2.Qxe7#
- 1...Sb8
- 2.Qe7#
- 1...Scd8
- 2.Qe7#
- 2.Qc7#
- 1...Sba5
- 2.Sd6#
- 1...Sxc5
- 2.Sd6#
- 1...Sd6+
- 2.Sxd6#
- 1...Sbd8
- 2.Sd6#
- 1...Qf4
- Tries
- 1.Kc7?
- 1...Qxf6
- 2.Qf8#
- 1...Qxh7
- 2.Qf8#
- 1...Sxd4
- 2.Qe7#
- 1...Sxc5
- 2.Sd6#
- 1...Qg5
- 2.Rf8#
- 2.Qf8#
- 1...Qg7
- 2.Rxg7#
- 1...Qf8
- 2.Rxf8#
- 2.Qxf8#
- 2.Qh5#
- 1...Qh5
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 2.Qxh5#
- 1...Qg6
- 2.Rf8#
- 2.Qf8#
- 1...Sb4
- 2.Qe7#
- 1...Sca5
- 2.Qe7#
- 1...Se5
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Sb8
- 2.Qe7#
- 1...Scd8
- 2.Qe7#
- 1...Sba5
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sbd8
- 2.Sd6#
- 1...Qf4+!
- 1...Qxf6
- 1.Be5?
- 1...Qf8+
- 2.Rxf8#
- 2.Qxf8#
- 1...Se7+
- 2.Rxe7#
- 2.Qxe7#
- 1...Sd6+
- 2.Sxd6#
- 1...Qxh7
- 2.Rf8#
- 2.Qf8#
- 1...Sxd4
- 2.Re7#
- 2.Qe7#
- 1...Sxe5
- 2.Qe7#
- 1...Sxc5
- 2.Sd6#
- 1...Qf4
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 1...Qg5
- 2.Rf8#
- 2.Qf8#
- 1...Qg7
- 2.Rxg7#
- 1...Qh5
- 2.Rf6#
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 1...Qf6
- 2.Rxf6#
- 2.Qf8#
- 1...Qg6
- 2.Rf8#
- 2.Qf8#
- 1...Sb4
- 2.Re7#
- 2.Qe7#
- 2.Qc7#
- 1...Sca5
- 2.Re7#
- 2.Qe7#
- 2.Qc7#
- 1...Sb8
- 2.Re7#
- 2.Qe7#
- 1...Scd8
- 2.Re7#
- 2.Qe7#
- 2.Qc7#
- 1...Sba5
- 2.Sd6#
- 1...Sbd8
- 2.Sd6#
- 1...Qxe6+!
- 1...Qf8+
- 1.Bh8?
- 1...Qf8+
- 2.Rxf8#
- 2.Qxf8#
- 1...Se7+
- 2.Rxe7#
- 2.Qxe7#
- 1...Sd6+
- 2.Sxd6#
- 1...Qxh7
- 2.Rf8#
- 2.Qf8#
- 1...Sxd4
- 2.Re7#
- 2.Qe7#
- 1...Sxc5
- 2.Sd6#
- 1...Qg7
- 2.Rxg7#
- 1...Qf4
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 2.Qh5#
- 1...Qg5
- 2.Rf8#
- 2.Qf8#
- 1...Qh5
- 2.Rf6#
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 2.Qxh5#
- 1...Qf6
- 2.Rxf6#
- 2.Rf8#
- 2.Qf8#
- 1...Qg6
- 2.Rf8#
- 2.Qf8#
- 1...Sb4
- 2.Re7#
- 2.Qe7#
- 2.Qc7#
- 1...Sca5
- 2.Re7#
- 2.Qe7#
- 2.Qc7#
- 1...Se5
- 2.Re7#
- 2.Qe7#
- 1...Sb8
- 2.Re7#
- 2.Qe7#
- 1...Scd8
- 2.Re7#
- 2.Qe7#
- 2.Qc7#
- 1...Sba5
- 2.Sd6#
- 1...Sbd8
- 2.Sd6#
- 1...Qxe6+!
- 1...Qf8+
- 1.Bg6+?
- 1...Qxg6
- 2.Rf8#
- 2.Qf8#
- 1...Kxg8!
- 1...Qxg6
- 1.Re7+?
- 1...Sxe7+
- 2.Qxe7#
- 1...Kxf6!
- 1...Sxe7+
- 1.Qa3?
- 1...Qf8+
- 2.Rxf8#
- 2.Qxf8#
- 1...Se7+
- 2.Qxe7#
- 1...Sd6+
- 2.Sxd6#
- 1...Qxf6
- 2.Qf8#
- 1...Qxh7
- 2.Qf8#
- 1...Sxd4
- 2.Qe7#
- 1...Qg7
- 2.Rxg7#
- 1...Qf4
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 1...Qg5
- 2.Rf8#
- 2.Qf8#
- 1...Qh5
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 1...Qg6
- 2.Rf8#
- 2.Qf8#
- 1...Sca5
- 2.Qe7#
- 1...Se5
- 2.Qe7#
- 1...Sb8
- 2.Qe7#
- 1...Scd8
- 2.Qe7#
- 1...Sba5
- 2.Sd6#
- 1...Sc5
- 2.Sd6#
- 1...Sbd8
- 2.Sd6#
- 1...Sb4!
- 1...Qf8+
- 1.Qb4?
- 1...Qf8+
- 2.Rxf8#
- 2.Qxf8#
- 1...Se7+
- 2.Qxe7#
- 1...Sd6+
- 2.Sxd6#
- 1...Qxf6
- 2.Qf8#
- 1...Qxh7
- 2.Qf8#
- 1...Sxd4
- 2.Qe7#
- 1...Qg7
- 2.Rxg7#
- 1...Qf4
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 1...Qg5
- 2.Rf8#
- 2.Qf8#
- 1...Qh5
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 1...Qg6
- 2.Rf8#
- 2.Qf8#
- 1...Sca5
- 2.Qe7#
- 1...Se5
- 2.Qe7#
- 1...Sb8
- 2.Qe7#
- 1...Scd8
- 2.Qe7#
- 1...Sba5
- 2.Sd6#
- 1...Sc5
- 2.Sd6#
- 1...Sbd8
- 2.Sd6#
- 1...Sxb4!
- 1...Qf8+
- 1.Qh5+?
- 1...Qg6
- 2.Qxg6#
- 1...Qxh5!
- 1...Qg6
- 1.Qxc6?
- threat
- 2.Re7#
- 2.Qd7#
- 2.Qe8#
- 2.Qc7#
- 1...Sd6+
- 2.Sxd6#
- 1...Qxf6
- 2.Qe8#
- 1...Qxh7
- 2.Qe8#
- 1...Qf4
- 2.Re7#
- 2.Qd7#
- 2.Qe8#
- 1...Sc5
- 2.Sd6#
- 2.Re7#
- 2.Qe8#
- 1...Qf8+!
- threat
- 1.axb7?
- threat
- 2.Sd6#
- 1...Qf8+
- 2.Rxf8#
- 2.Qxf8#
- 1...Se7+
- 2.Qxe7#
- 1...Qxh7
- 2.Qf8#
- 1...Sxd4
- 2.Qe7#
- 1...Qf4
- 2.Rg7#
- 2.Rf8#
- 2.Qf8#
- 2.Qh5#
- 1...Bxb7+!
- threat
- 1.Kc7?
- Keys
- 1.Qf5!
- 1...Qf8+
- 2.Bd8#
- 1...Se7+
- 2.Rxe7#
- 1...Sd6+
- 2.Sxd6#
- 1...Qxf6
- 2.Qxf6#
- 1...Qxh7
- 2.Qxh7#
- 1...Sxd4
- 2.Re7#
- 1...Qg7
- 2.Bxg7#
- 1...Qf4
- 2.Qg6#
- 2.Qh5#
- 1...Qg5
- 2.Bxg5#
- 1...Qh5
- 2.Bg5#
- 2.Qxh5#
- 1...Qg6
- 2.Qxg6#
- 1...Sb4
- 2.Re7#
- 1...Sca5
- 2.Re7#
- 1...Se5
- 2.Re7#
- 1...Sb8
- 2.Re7#
- 1...Scd8
- 2.Re7#
- 1...Sba5
- 2.Sd6#
- 1...Sc5
- 2.Sd6#
- 1...Sbd8
- 2.Sd6#
- 1...Qf8+
- 1.Qf5!
There are these versions: 110801
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- Q(d);N_GUARD::R1(K),XQ(d)
- Q(d);N_GUARD,XB(H)::QAR1(E)
- Q(d);N_GUARD,XB(I)::QAR1(E)
- S(c);N_GUARD,XS(C)::QAR1(E)
- S(c);N_GUARD::QAR1(E)
- S(c);CHECK,N_GUARD::QAR1(E),XS(c)
- S(f);N_GUARD::S(D)
- S(f);N_GUARD,XQ(E)::S(D)
- S(f);CHECK,N_GUARD::S(D),XS(f)
- Tries
- Try
- K(J);P-FLIGHT
- Vars
- Q(d);N_GUARD,XB(H)::QAR1(E)
- Q(d);N_GUARD,XB(I)::QAR1(E)
- S(c);N_GUARD,XS(C)::QAR1(E)
- S(f);N_GUARD,XQ(E)::S(D)
- Q(d);N_GUARD::R1(K),XQ(d)
- S(c);N_GUARD::QAR1(E)
- S(c);N_GUARD::QAR1(E),XS(c)
- S(f);N_GUARD::S(D)
- S(f);N_GUARD::S(D),XS(f)
- Refutation
- Q(d);CHECK
- Try
- B(H);
- Vars
- S(f);CHECK,N_GUARD::S(D),XS(f)
- S(c);N_GUARD,XB(H)::QAR1(E)
- S(f);N_GUARD,XQ(E)::S(D)
- Q(d);N_GUARD::R1(K),XQ(d)
- S(f);N_GUARD::S(D)
- Refutation
- Q(d);CHECK,XR(G)
- Try
- B(H);
- Vars
- S(f);CHECK,N_GUARD::S(D),XS(f)
- S(f);N_GUARD,XQ(E)::S(D)
- Q(d);N_GUARD::R1(K),XQ(d)
- S(f);N_GUARD::S(D)
- Refutation
- Q(d);CHECK,XR(G)
- Try
- B(I);CHECK
- Refutation
- K(g);S_FLIGHT,XR(K)
- Try
- R(G);CHECK
- Vars
- S(c);CHECK,OGATE,XR(G)::QAR1(E),XS(c)
- Refutation
- K(g);P-FLIGHT,XB(H)
- Try
- Q(E);
- Vars
- S(c);CHECK,N_GUARD::QAR1(E),XS(c)
- S(f);CHECK,N_GUARD::S(D),XS(f)
- Q(d);N_GUARD,XB(H)::QAR1(E)
- Q(d);N_GUARD,XB(I)::QAR1(E)
- S(c);N_GUARD,XS(C)::QAR1(E)
- Q(d);N_GUARD::R1(K),XQ(d)
- S(c);N_GUARD::QAR1(E)
- S(f);N_GUARD::S(D)
- Refutation
- S(c);
- Try
- Q(E);
- Vars
- S(c);CHECK,N_GUARD::QAR1(E),XS(c)
- S(f);CHECK,N_GUARD::S(D),XS(f)
- Q(d);N_GUARD,XB(H)::QAR1(E)
- Q(d);N_GUARD,XB(I)::QAR1(E)
- S(c);N_GUARD,XS(C)::QAR1(E)
- Q(d);N_GUARD::R1(K),XQ(d)
- S(c);N_GUARD::QAR1(E)
- S(f);N_GUARD::S(D)
- Refutation
- S(c);XQ(E)
- Try
- Q(E);CHECK
- Vars
- Q(d);N_GUARD,P_SPINQ(d)::QAB1(E),XQ(d)
- Refutation
- Q(d);XQ(E)
- Try
- Q(E);XS(c)
- Threat
- DUALS(4)
- Vars
- S(f);CHECK,N_GUARD::S(D),XS(f)
- Q(d);XB(H)::QAB1(E)
- Q(d);XB(I)::QAB1(E)
- Refutation
- Q(d);CHECK
- Try
- P(F);XS(f)
- Threat
- S(D)
- Vars
- S(c);CHECK,N_GUARD::QAR1(E),XS(c)
- Q(d);N_GUARD,XB(I)::QAR1(E)
- S(c);N_GUARD,XS(C)::QAR1(E)
- Refutation
- B(h);CHECK,XP(F)
- Try
- Actual
- Q(E);
- Vars
- Q(d);CHECK,N_GUARD::QAR(E)+B(H)
- S(c);CHECK,N_GUARD::R1(G),XS(c)
- S(f);CHECK,N_GUARD::S(D),XS(f)
- Q(d);OGATE,P_SPINQ(d),XB(H)::QAR1(E),XQ(d)
- Q(d);OGATE,XB(I)::QAR2(E),XQ(d)
- S(c);N_GUARD,XS(C)::R1(G)
- Q(d);N_GUARD::QAR(E)+B(H),XQ(d)
- Q(d);N_GUARD::QAB1(E),XQ(d)
- S(c);N_GUARD::R1(G)
- S(f);N_GUARD::S(D)
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).