MESON Chess Problem Database
Problem Display
PID: 198879 (2b5/N2p4/2p2p2/R1R5/2pk1pQ1/5PP1/1P2PKn1/8 w - - 0 1)
Niemeijer, Meindert
Brisbane Courier, 1921
#2
9 + 8
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Ba6
- 2.Qxd7#
- 1...Bb7
- 2.Qxd7#
- 1...Se1
- 2.Qxf4#
- 1...Se3
- 2.Qxf4#
- 1...Sh4
- 2.Qxf4#
- 1...c3
- 2.bxc3#
- 1...f5
- 2.Qg7#
- 1...d5
- 2.Sxc6#
- 1...d6
- 2.Sxc6#
- 1...Ba6
- Tries
- 1.Rab5?
- 1...d5
- 2.Sxc6#
- 1...Ba6
- 2.Qxd7#
- 1...Bb7
- 2.Qxd7#
- 1...Se1
- 2.Qxf4#
- 1...Se3
- 2.Qxf4#
- 1...Sh4
- 2.Qxf4#
- 1...c3
- 2.bxc3#
- 1...f5
- 2.Qg7#
- 1...d6
- 2.Sxc6#
- 1...cxb5!
- 1...d5
- 1.Rxc6?
- threat
- 2.Rd6#
- 1...dxc6
- 2.Sxc6#
- 1...Bb7
- 2.Qxd7#
- 1...Se3
- 2.Qxf4#
- 1...c3
- 2.bxc3#
- 1...d6
- 2.Rxd6#
- 1...d5!
- threat
- 1.Qf5?
- threat
- 2.Qe4#
- 2.Qxf6#
- 1...d5
- 2.Sxc6#
- 2.Qxf6#
- 1...fxg3+!
- threat
- 1.Qe6?
- threat
- 2.Rxc4#
- 2.Qxc4#
- 2.Qe4#
- 2.Qd6#
- 2.Qxf6#
- 1...dxe6
- 2.Sxc6#
- 1...Ba6
- 2.Qxd7#
- 2.Qe4#
- 2.Qd6#
- 2.Qxf6#
- 1...Se3
- 2.Qe4#
- 2.Qxf6#
- 1...c3
- 2.Rc4#
- 2.Qc4#
- 2.Qe4#
- 2.Qd6#
- 2.Qxf6#
- 2.bxc3#
- 1...f5
- 2.Rxc4#
- 2.Qxc4#
- 2.Qe5#
- 2.Qd6#
- 2.Qf6#
- 1...d5
- 2.Sxc6#
- 2.Qxf6#
- 1...d6
- 2.Sxc6#
- 2.Rxc4#
- 2.Qxc4#
- 2.Qe4#
- 2.Qxd6#
- 2.Qxf6#
- 1...fxg3+!
- threat
- 1.Qh4?
- threat
- 2.Qxf6#
- 1...f5
- 2.Qf6#
- 2.Qh8#
- 1...Sxh4!
- threat
- 1.Qg6?
- threat
- 2.Qe4#
- 2.Qxf6#
- 1...d5
- 2.Sxc6#
- 2.Qxf6#
- 1...f5
- 2.Qd6#
- 2.Qf6#
- 2.Qg7#
- 1...fxg3+!
- threat
- 1.gxf4?
- 1...Sxf4
- 2.Qxf4#
- 1...Ba6
- 2.Qxd7#
- 1...Bb7
- 2.Qxd7#
- 1...Se1
- 2.f5#
- 1...Sh4
- 2.f5#
- 1...c3
- 2.bxc3#
- 1...f5
- 2.Qg7#
- 1...d5
- 2.Sxc6#
- 1...d6
- 2.Sxc6#
- 1...Se3!
- 1...Sxf4
- 1.Rab5?
- Keys
- 1.Rh5!
- 1...c3
- 2.Ra4#
- 1...Ba6
- 2.Qxd7#
- 1...Bb7
- 2.Qxd7#
- 1...Se1
- 2.Qxf4#
- 1...Se3
- 2.Qxf4#
- 1...Sh4
- 2.Qxf4#
- 1...c5
- 2.Sb5#
- 1...f5
- 2.Qg7#
- 1...d5
- 2.Sxc6#
- 1...d6
- 2.Sxc6#
- 1...c3
- 1.Rh5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(h);N_GUARD::QAR(F),XP(g)
- S(a);N_GUARD::QAR2(F),XP(d)
- P(b);OGATE::P(A),XP(b)
- P(f);OGATEB::QAB(F)
- P(g);N_GUARD::S(I),XP(e)
- Tries
- Try
- R(G);
- Vars
- P(g);N_GUARD::S(I),XP(e)
- B(h);N_GUARD::QAR(F),XP(g)
- S(a);N_GUARD::QAR2(F),XP(d)
- P(b);OGATE::P(A),XP(b)
- P(f);OGATEB::QAB(F)
- Refutation
- P(e);XR(G)
- Try
- R(H);XP(e)
- Threat
- R(H)
- Vars
- P(g);XR(H)::S(I),XP(g)
- B(h);N_GUARD::QAR(F),XP(g)
- S(a);N_GUARD::QAR2(F),XP(d)
- P(b);OGATE::P(A),XP(b)
- P(g);::R(H),XP(g)
- Refutation
- P(g);
- Try
- Q(F);N_PINP(d)
- Threat
- DUALS(2)
- Refutation
- P(d);CHECK,XP(E)
- Try
- Q(F);N_PINP(d)
- Threat
- DUALS(5)
- Vars
- P(g);N_GUARD,XQ(F)::S(I),XP(e)
- Refutation
- P(d);CHECK,XP(E)
- Try
- Q(F);
- Threat
- QAB(F),XP(f)
- Refutation
- S(a);N_SPINP(d),XQ(F)
- Try
- Q(F);N_PINP(d)
- Threat
- DUALS(2)
- Refutation
- P(d);CHECK,XP(E)
- Try
- P(E);XP(d)
- Vars
- S(a);OGATE,P_SPINS(a),XP(E)::QAR2(F),XS(a)
- B(h);N_GUARD::QAR(F),XP(g)
- S(a);N_GUARD::QAR(F)+P(E)
- P(b);OGATE::P(A),XP(b)
- P(f);OGATEB::QAB(F)
- P(g);N_GUARD::S(I),XP(e)
- Refutation
- S(a);
- Try
- Actual
- R(H);
- Vars
- P(b);OGATEB::R(G)
- B(h);N_GUARD::QAR(F),XP(g)
- S(a);N_GUARD::QAR2(F),XP(d)
- P(e);N_GUARD::S(I)
- P(f);OGATEB::QAB(F)
- P(g);N_GUARD::S(I),XP(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).