MESON Chess Problem Database
Problem Display
PID: 21939 (7K/1p6/1B1N1np1/8/7p/p3Pk1B/R1Q1p3/6nN w - - 0 1)
Hartong, Jan
1st Prize, Good Companions (April Complete Blocks), 1922
#2
8 + 8
| 3132 | The Good Companion Two-Mover | 1922 |
| 45 | Schach | 1952 |
| 3147 | Chess Problems: Introduction to an Art | 1963 |
SOLUTION
- SOUND
- Sets
- 1...Sxh3
- 2.Qxe2#
- 1...Se4
- 2.Qxe4#
- 1...Sg4
- 2.Qe4#
- 1...Sd5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Sg8
- 2.Qe4#
- 1...e1Q
- 2.Qg2#
- 1...e1S
- 2.Qf2#
- 1...e1B
- 2.Qg2#
- 1...e1R
- 2.Qf2#
- 2.Qg2#
- 1...g5
- 2.Qf5#
- 1...Sxh3
- Tries
- 1.Sc4?
- threat
- 2.Sd2#
- 2.Se5#
- 1...e1Q
- 2.Se5#
- 2.Qg2#
- 1...e1S
- 2.Se5#
- 1...e1B
- 2.Se5#
- 2.Qg2#
- 1...e1R
- 2.Se5#
- 2.Qg2#
- 1...Se4
- 2.Se5#
- 1...Sg4
- 2.Sd2#
- 1...Sd7
- 2.Sd2#
- 1...Sxh3!
- threat
- 1.Sf7?
- threat
- 2.Se5#
- 2.Sg5#
- 1...Se4
- 2.Se5#
- 1...Sg4
- 2.Sg5#
- 1...Sd7
- 2.Sg5#
- 1...Sh7
- 2.Se5#
- 1...g5
- 2.Se5#
- 2.Sxg5#
- 2.Qf5#
- 1...Sxh3!
- threat
- 1.Bg2+?
- 1...Kg4
- 2.Qxg6#
- 1...Kxg2!
- 1...Kg4
- 1.Rxa3?
- 1...e1Q
- 2.Qg2#
- 1...e1S
- 2.Qf2#
- 1...e1B
- 2.Qg2#
- 1...e1R
- 2.Qf2#
- 2.Qg2#
- 1...Se4
- 2.Qxe4#
- 1...Sg4
- 2.Qe4#
- 1...Sd5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Sg8
- 2.Qe4#
- 1...g5
- 2.Qf5#
- 1...Sxh3!
- 1...e1Q
- 1.Qxg6?
- threat
- 2.Bg2#
- 2.Qf5#
- 2.Qg2#
- 2.Qxf6#
- 1...e1S
- 2.Rf2#
- 2.Qf5#
- 2.Qxf6#
- 1...Se4
- 2.Bg2#
- 2.Qxe4#
- 2.Qf5#
- 2.Qh5#
- 2.Qg2#
- 2.Qg4#
- 1...Sg4
- 2.Qe4#
- 2.Qf5#
- 2.Qxg4#
- 1...Sd5
- 2.Bg2#
- 2.Qe4#
- 2.Qh5#
- 2.Qg2#
- 2.Qg4#
- 1...Sh5
- 2.Bg2#
- 2.Qe4#
- 2.Qxh5#
- 2.Qg2#
- 2.Qg4#
- 1...Sd7
- 2.Bg2#
- 2.Qe4#
- 2.Qf5#
- 2.Qh5#
- 2.Qg2#
- 2.Qg4#
- 1...Sh7
- 2.Bg2#
- 2.Qe4#
- 2.Qf5#
- 2.Qh5#
- 2.Qg2#
- 2.Qg4#
- 1...Se8
- 2.Bg2#
- 2.Qe4#
- 2.Qf5#
- 2.Qh5#
- 2.Qg2#
- 2.Qg4#
- 1...Sg8
- 2.Bg2#
- 2.Qe4#
- 2.Qf5#
- 2.Qh5#
- 2.Qg2#
- 2.Qg4#
- 1...Sxh3!
- threat
- 1.Qc4?
- threat
- 2.Qf4#
- 1...Sxh3
- 2.Qxe2#
- 1...Se4
- 2.Qxe4#
- 1...Sd5
- 2.Qxd5#
- 2.Qe4#
- 2.Qg4#
- 1...Sh5
- 2.Qd5#
- 2.Qe4#
- 2.Qg4#
- 1...g5!
- threat
- 1.Qc6+?
- 1...Se4
- 2.Qxe4#
- 1...Sd5
- 2.Qxd5#
- 1...bxc6!
- 1...Se4
- 1.Sc4?
- Keys
- 1.Qc8!
- 1...Sxh3
- 2.Qxh3#
- 1...e1Q
- 2.Bg2#
- 1...e1S
- 2.Rf2#
- 1...e1B
- 2.Bg2#
- 1...e1R
- 2.Bg2#
- 2.Rf2#
- 1...Se4
- 2.Qg4#
- 1...Sg4
- 2.Qxg4#
- 2.Qxb7#
- 1...Sd5
- 2.Qg4#
- 1...Sh5
- 2.Qg4#
- 2.Qxb7#
- 1...Sd7
- 2.Qxb7#
- 1...Sh7
- 2.Qg4#
- 2.Qxb7#
- 1...Se8
- 2.Qg4#
- 2.Qxb7#
- 1...Sg8
- 2.Qg4#
- 2.Qxb7#
- 1...g5
- 2.Qf5#
- 1...Sxh3
- 1.Qc8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 0
- REMOVED MATES = 5
- Sets
- S(a);N_GUARD,XB(E)::QAB1(C),XP(b)
- S(f);N_GUARD::QAB1(C),XS(f)
- S(f);N_GUARD::QAB1(C)
- P(b);OGATE::QAB1(C)
- P(b);OGATE::QAR1(C)
- P(g);N_GUARD::QAR2(C)
- Tries
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- P(b);::S(G)
- S(f);::S(G)
- Refutation
- S(a);XB(E)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- S(f);::S(G)
- Refutation
- S(a);XB(E)
- Try
- B(E);CHECK
- Vars
- K(d);S_FLIGHT::QAR2(C),XP(g)
- Refutation
- K(d);P_SPINP(b),S_FLIGHT,XB(E)
- Try
- R(B);XP(c)
- Vars
- P(b);OGATE::QAB1(C)
- P(b);OGATE::QAR1(C)
- S(f);N_GUARD::QAB1(C),XS(f)
- S(f);N_GUARD::QAB1(C)
- P(g);N_GUARD::QAR2(C)
- Refutation
- S(a);XB(E)
- Try
- Q(C);XP(g)
- Threat
- DUALS(4)
- Refutation
- S(a);XB(E)
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- S(a);N_GUARD,XB(E)::QAB1(C),XP(b)
- S(f);N_GUARD::QAB1(C),XS(f)
- Refutation
- P(g);
- Try
- Q(C);CHECK
- Vars
- S(f);N_GUARD,P_SPINS(f)::QAB1(C),XS(f)
- S(f);N_GUARD,P_SPINS(f)::QAB(C),XS(f)
- Refutation
- P(h);XQ(C)
- Try
- Actual
- Q(C);
- Vars
- S(a);OGATE,XB(E)::QAR2(C),XS(a)
- P(b);::B(E)
- P(b);OGATE::R1(B)
- S(f);N_GUARD::QAB1(C)
- S(f);N_GUARD::QAB(C),XP(h)
- P(g);N_GUARD::QAR2(C)
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).