MESON Chess Problem Database
Problem Display
PID: 64591 (4n1N1/8/8/K4Rp1/PRp1k1P1/p2r4/rnB1p1p1/bQ4B1 w - - 0 1)
Niemeijer, Meindert
Good Companions (April), 1921
#2
9 + 11
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Bxd3#
- 1...Sxa4
- 2.Bxd3#
- 1...Sd6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Sd1
- Tries
- 1.Ka6?
- 1...Sxa4
- 2.Bxd3#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Sd1
- 2.Bxd3#
- 1...Sd6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sg7
- 2.Sf6#
- 1...Sc7+!
- 1...Sxa4
- 1.Kb6?
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Sd1
- 2.Bxd3#
- 1...Sd6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...Sxa4+!
- 1...e1Q
- 1.Qxa1?
- 1...Sxa4
- 2.Rxc4#
- 2.Qd4#
- 2.Qe5#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Sd1
- 2.Rxc4#
- 2.Qd4#
- 2.Qe5#
- 1...Sd6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...Rxa1!
- 1...Sxa4
- 1.Qc1?
- threat
- 2.Qe3#
- 1...e1Q
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Sd1!
- threat
- 1.Ka6?
- Keys
- 1.Rb8!
- threat
- 2.Rxe8#
- 1...e1Q+
- 2.Qxe1#
- 1...e1B+
- 2.Qxe1#
- 1...Sxa4
- 2.Qb7#
- 1...Sd1
- 2.Qb7#
- 1...Sd6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- threat
- 1.Rb8!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- S(c);N_GUARD::B(C),XR(g)
- S(c);N_GUARD,XP(D)::B(C),XR(g)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(d);OGATEB,P_PINR(E)::QAR(A),XQ(d)
- P(d);OGATEB::QAR(A),XS(d)
- P(d);OGATEB,P_PINR(E)::QAR(A),XB(d)
- P(d);OGATEB::QAR(A),XR(d)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- S(c);N_GUARD,XP(D)::B(C),XR(g)
- P(d);OGATEB::QAR(A),XQ(d)
- P(d);OGATEB::QAR(A),XS(d)
- P(d);OGATEB::QAR(A),XB(d)
- P(d);OGATEB::QAR(A),XR(d)
- S(c);N_GUARD::B(C),XR(g)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- Refutation
- S(k);CHECK
- Try
- K(G);S_FLIGHT
- Vars
- P(d);OGATEB::QAR(A),XQ(d)
- P(d);OGATEB::QAR(A),XS(d)
- P(d);OGATEB::QAR(A),XB(d)
- P(d);OGATEB::QAR(A),XR(d)
- S(c);N_GUARD::B(C),XR(g)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- Refutation
- S(c);CHECK,XP(D)
- Try
- Q(A);XB(a)
- Vars
- P(d);OGATEB,P_PINR(E)::QAR(A),XQ(d)
- P(d);OGATEB::QAR(A),XS(d)
- P(d);OGATEB,P_PINR(E)::QAR(A),XB(d)
- P(d);OGATEB::QAR(A),XR(d)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- Refutation
- R(b);XQ(A)
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- P(d);OGATEB,P_PINR(E)::QAR(A),XQ(d)
- P(d);OGATEB::QAR(A),XR(d)
- Refutation
- S(c);
- Try
- Actual
- R(E);N_PINP(h)
- Threat
- R(E),XS(k)
- Vars
- P(d);CHECK,OGATEB::QAR(A),XQ(d)
- P(d);CHECK,OGATEB::QAR(A),XB(d)
- S(c);OGATE,XP(D)::QAB(A)
- S(c);OGATE::QAB(A)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
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).