MESON Chess Problem Database
Problem Display
PID: 3109 (8/4p3/2pnK2p/5RpP/pBpkb1QP/P7/3N1Pp1/2N3n1 w - - 0 1)
Feenstra Kuiper, Pieter
Good Companions (May), 1918
#2
10 + 11
| 2681 | All Change Here! | 1919 |
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Se2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sh3
- 2.Sf3#
- 1...Sb5
- 2.Qxe4#
- 1...Sxf5
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...c3
- 2.Bc5#
- 1...gxh4
- 2.Qg7#
- 1...c5
- 2.Rd5#
- 1...Se2
- Tries
- 1.Sxe4?
- threat
- 2.Sxd6#
- 2.Bc3#
- 2.Bc5#
- 1...Sxf5
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sf6#
- 2.Bc3#
- 2.Bc5#
- 1...c3
- 2.Sxd6#
- 1...Se2
- 2.Bc5#
- 1...Sh3
- 2.Bc3#
- 2.Bc5#
- 1...Sb5
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sf6#
- 2.Bc5#
- 1...Sb7
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sf6#
- 2.Bc3#
- 1...Sf7
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sf6#
- 2.Bc3#
- 2.Bc5#
- 1...Sc8
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sf6#
- 2.Bc3#
- 2.Bc5#
- 1...Se8
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sf6#
- 2.Bc3#
- 2.Bc5#
- 1...c5
- 2.Sxd6#
- 2.Bc3#
- 2.Bxc5#
- 2.Rd5#
- 1...Sxe4!
- threat
- 1.Ra5?
- 1...gxh4
- 2.Qg7#
- 1...c3
- 2.Bc5#
- 1...Se2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sh3
- 2.Sf3#
- 1...Sb5
- 2.Qxe4#
- 1...Sf5
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...c5!
- 1...gxh4
- 1.Rc5?
- 1...gxh4
- 2.Qg7#
- 1...Se2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sh3
- 2.Sf3#
- 1...Sb5
- 2.Rxc4#
- 2.Qxe4#
- 1...Sf5
- 2.Rxc4#
- 2.Qxe4#
- 1...Sb7
- 2.Rxc4#
- 2.Qxe4#
- 1...Sf7
- 2.Rxc4#
- 2.Qxe4#
- 1...Sc8
- 2.Rxc4#
- 2.Qxe4#
- 1...Se8
- 2.Rxc4#
- 2.Qxe4#
- 1...c3!
- 1...gxh4
- 1.Re5?
- 1...c3
- 2.Bc5#
- 1...Se2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sh3
- 2.Sf3#
- 1...Sb5
- 2.Rxe4#
- 2.Qxe4#
- 1...Sf5
- 2.Rxe4#
- 2.Qxe4#
- 1...Sb7
- 2.Rxe4#
- 2.Qxe4#
- 1...Sf7
- 2.Rxe4#
- 2.Qxe4#
- 1...Sc8
- 2.Rxe4#
- 2.Qxe4#
- 1...Se8
- 2.Rxe4#
- 2.Qxe4#
- 1...c5
- 2.Rd5#
- 1...gxh4!
- 1...c3
- 1.Rxg5?
- 1...c3
- 2.Bc5#
- 1...Se2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sh3
- 2.Sf3#
- 1...Sb5
- 2.Qxe4#
- 1...Sf5
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...c5
- 2.Rd5#
- 1...hxg5!
- 1...c3
- 1.Qf4?
- threat
- 2.Qe3#
- 2.Qe5#
- 1...Sxf5
- 2.Qe5#
- 2.Qxe4#
- 1...Sf3
- 2.Sxf3#
- 2.Qe3#
- 1...Sf7
- 2.Qe3#
- 2.Qxe4#
- 1...gxf4!
- threat
- 1.hxg5?
- 1...Sxf5
- 2.Qxe4#
- 1...c3
- 2.Bc5#
- 1...Se2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sh3
- 2.Sf3#
- 1...Sb5
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...c5
- 2.Rd5#
- 1...hxg5!
- 1...Sxf5
- 1.Sxe4?
- Keys
- 1.Rf3!
- 1...Sxf3
- 2.Sxf3#
- 1...gxh4
- 2.Qg7#
- 1...Se2
- 2.Sxe2#
- 1...Sh3
- 2.Se2#
- 1...Sb5
- 2.Qxe4#
- 1...Sf5
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...c3
- 2.Rd3#
- 1...c5
- 2.Bc3#
- 1...Sxf3
- 1.Rf3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(i);N_GUARD::QAR1(F),XB(f)
- S(i);N_GUARD,XR(H)::QAR1(F),XB(f)
- P(d);SBLOCK::B(E)
- P(g);OGATE,XP(G)::QAB(F)
- P(h);N_GUARD::R1(H)
- Tries
- Try
- S(B);XB(f)
- Threat
- DUALS(3)
- Vars
- P(d);::QAR(F)+S(B),XS(i)
- S(a);::B(E)
- Refutation
- S(i);P_SPINS(i),XS(B)
- Try
- R(H);
- Vars
- P(g);OGATE,XP(G)::QAB(F)
- P(d);SBLOCK::B(E)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(i);N_GUARD::QAR1(F),XB(f)
- Refutation
- P(h);
- Try
- R(H);
- Vars
- P(g);OGATE,XP(G)::QAB(F)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- Refutation
- P(d);
- Try
- R(H);
- Vars
- P(d);SBLOCK::B(E)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- P(h);N_GUARD::R1(H)
- Refutation
- P(g);XP(G)
- Try
- R(H);XP(g)
- Vars
- P(d);SBLOCK::B(E)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(i);N_GUARD::QAR1(F),XB(f)
- P(h);N_GUARD::R1(H)
- Refutation
- P(j);XR(H)
- Try
- Q(F);
- Threat
- DUALS(2)
- Refutation
- P(g);N_SPINB(f),XQ(F)
- Try
- P(G);XP(g)
- Vars
- S(i);N_GUARD,XR(H)::QAR1(F),XB(f)
- P(d);SBLOCK::B(E)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(i);N_GUARD::QAR1(F),XB(f)
- P(h);N_GUARD::R1(H)
- Refutation
- P(j);XP(G)
- Try
- Actual
- R(H);
- Vars
- S(a);XR(H)::S(B),XS(a)
- P(g);OGATE,XP(G)::QAB(F)
- S(a);N_GUARD::S(A),XS(a)
- S(a);N_GUARD::S(A)
- S(i);N_GUARD::QAR1(F),XB(f)
- P(d);N_GUARD::R1(H)
- P(h);SBLOCK::B(E)
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).