MESON Chess Problem Database
Problem Display
PID: 21507 (8/1p6/8/5p2/4NkpP/4Rqr1/KQ3nrP/2B2R2 w - - 0 1)
Promislo, Charles
1st HM., Good Companions (January), 1919
#2
8 + 8
| 3132 | The Good Companion Two-Mover | 1922 |
| 3391 | Het Half Pin Thema | 1924 |
SOLUTION
- SOUND
- Sets
- 1...Sh1
- 2.Re2#
- 1...Sh3
- 2.Re2#
- 1...Sxe4
- 2.Rexf3#
- 1...fxe4
- 2.Qf6#
- 1...Sh1
- Tries
- 1.Sg5?
- threat
- 2.Se6#
- 2.Rxf3#
- 2.Re4#
- 2.Qe5#
- 1...Qxe3
- 2.Qd4#
- 1...Qd1
- 2.Se6#
- 2.Rf3#
- 2.Re4#
- 2.Qe5#
- 1...Qe2
- 2.Se6#
- 2.Rf3#
- 2.Re4#
- 1...Qe4
- 2.Rf3#
- 2.Rxe4#
- 1...Qc6
- 2.Rf3#
- 2.Re4#
- 2.Qe5#
- 1...Sd1
- 2.Se6#
- 2.Rexf3#
- 2.Re4#
- 1...Sh1
- 2.Se6#
- 2.Re2#
- 2.Rexf3#
- 2.Re4#
- 1...Sd3
- 2.Se6#
- 2.Rexf3#
- 2.Re4#
- 1...Sh3
- 2.Se6#
- 2.Re2#
- 2.Rexf3#
- 2.Re4#
- 1...Se4
- 2.Se6#
- 2.Rexf3#
- 2.Rxe4#
- 1...Qd5+!
- threat
- 1.Sf6?
- threat
- 2.Sh5#
- 2.Re4#
- 2.Qe5#
- 1...Qd5+
- 2.Sxd5#
- 1...Qd1
- 2.Sh5#
- 2.Qe5#
- 1...Qe2
- 2.Sd5#
- 2.Sh5#
- 1...Qe4
- 2.Sh5#
- 1...Qc6
- 2.Sh5#
- 2.Qe5#
- 1...Sd1
- 2.Sd5#
- 2.Sh5#
- 2.Rexf3#
- 2.Re4#
- 1...Sh1
- 2.Sd5#
- 2.Sh5#
- 2.Re2#
- 2.Rexf3#
- 2.Re4#
- 1...Sd3
- 2.Sd5#
- 2.Sh5#
- 2.Rexf3#
- 2.Re4#
- 1...Sh3
- 2.Sd5#
- 2.Sh5#
- 2.Re2#
- 2.Rexf3#
- 2.Re4#
- 1...Se4
- 2.Sd5#
- 2.Sh5#
- 2.Rexf3#
- 2.Rxe4#
- 1...Qxe3!
- threat
- 1.Rd3+?
- 1...Kxe4
- 2.Qd4#
- 1...Qe3!
- 1...Kxe4
- 1.Rxf3+?
- 1...Kxf3
- 2.Sg5#
- 1...Kxe4!
- 1...Kxf3
- 1.Sg5?
- Keys
- 1.Qd4!
- threat
- 2.Qd6#
- 1...Qe2+
- 2.Sd2#
- 1...Sd1+
- 2.Sd2#
- 1...Sh1+
- 2.Sd2#
- 2.Re2#
- 1...Sd3+
- 2.Sd2#
- 1...Sh3+
- 2.Sd2#
- 2.Re2#
- 1...Sxe4+
- 2.Re2#
- 1...Qxe4
- 2.Rxg3#
- 1...Qxe3
- 2.Sg5#
- 1...fxe4
- 2.Qf6#
- 1...Qd1
- 2.Sd2#
- threat
- 1.Qd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 2
- Sets
- S(a);P_PINQ(D),P_SPINQ(c)::B(A)+R(F)
- S(a);P_PINQ(D),P_SPINQ(c),SBLOCK,XS(G)::B(A)+R(F),DCHECK,XQ(c)
- P(g);OGATEB,XS(G)::QAR2(D)
- Tries
- Try
- S(G);
- Threat
- DUALS(4)
- Vars
- Q(c);N_GUARD,P_SPINQ(c),P_SPINS(a),XR(F)::QAR2(D)
- Refutation
- Q(c);CHECK,P_SPINS(a)
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- Q(c);CHECK,N_GUARD,P_SPINS(a)::S(G),XQ(c)
- Q(c);P_SPINS(a)::S(G)
- Refutation
- Q(c);P_SPINQ(c),P_SPINS(a),XR(F)
- Try
- R(F);CHECK
- Vars
- K(e);P-FLIGHT,XS(G)::QAR1(D)
- Refutation
- Q(c);P_SPINQ(c),P_SPINS(a)
- Try
- R(F);CHECK,XQ(c)
- Vars
- K(e);P-FLIGHT,P_SPINS(a),XR(F)::S(G)
- Refutation
- K(e);P-FLIGHT,XS(G)
- Try
- Actual
- Q(D);
- Threat
- QAB(D)
- Vars
- Q(c);CHECK,N_GUARD,P_SPINS(a)::QAR(D)+S(G)
- S(a);CHECK,N_GUARD,P_SPINQ(c)::QAR(D)+S(G)
- S(a);CHECK,P_SPINQ(c),P_SPINS(a),XS(G)::B(A)+R(F)
- Q(c);OGATE,P_SPINQ(c),P_SPINS(a),XS(G)::B(A)+R(F),XR(d)
- Q(c);N_GUARD,P_SPINQ(c),P_SPINS(a),XR(F)::QAR(D)+S(G)
- P(g);OGATEB,P_SPINP(g),XS(G)::QAR2(D)
- Q(c);N_GUARD,P_SPINS(a)::QAR(D)+S(G)
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).