MESON Chess Problem Database
Problem Display
PID: 15489 (2Q5/Np3r2/1n3p1B/R3P3/2Pk3r/b6p/2KN4/2n5 w - - 0 1)
Groeneveld, Cornelis
van Gool, Johann Christoffel
3rd Prize, Schach-Aktiv, 1984
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Re4
- 2.Sf3#
- 1...Rg4
- 2.Qxg4#
- 1...Rh5
- 2.Qg4#
- 1...Bb2
- 2.Qc5#
- 1...Bc5
- 2.Qxc5#
- 1...Sa4
- 2.Rd5#
- 1...Sxc4
- 2.Qxc4#
- 1...Sd5
- 2.Rxd5#
- 1...Sd7
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...Sxc8
- 2.Rd5#
- 1...fxe5
- 2.Sb5#
- 1...Re4
- Tries
- 1.Qxh3?
- threat
- 2.Be3#
- 2.Qc3#
- 2.Qe3#
- 2.Qxh4#
- 1...Rxh6
- 2.Qc3#
- 1...Sxc4
- 2.Qc3#
- 2.Qxh4#
- 1...fxe5
- 2.Be3#
- 2.Qc3#
- 2.Qe3#
- 1...Bc5
- 2.Qc3#
- 2.Qe3#
- 1...Sd5
- 2.Rxd5#
- 1...Re4
- 2.Qc3#
- 1...Rf4
- 2.Qc3#
- 1...Rg4
- 2.Be3#
- 2.Qxg4#
- 2.Qc3#
- 2.Qe3#
- 1...Rh5
- 2.Be3#
- 2.Qg4#
- 2.Qc3#
- 2.Qe3#
- 1...Rg7
- 2.Be3#
- 2.Qc3#
- 2.Qe3#
- 1...Bb2
- 2.Be3#
- 2.Qe3#
- 2.Qxh4#
- 1...Bb4
- 2.Be3#
- 2.Qe3#
- 2.Qxh4#
- 1...Sa2
- 2.Be3#
- 2.Qd3#
- 2.Qe3#
- 2.Qxh4#
- 1...Se2
- 2.Be3#
- 2.Qd3#
- 2.Qe3#
- 1...Sd3
- 2.Be3#
- 2.Qxd3#
- 2.Qe3#
- 1...Sa4
- 2.Be3#
- 2.Rd5#
- 2.Qe3#
- 2.Qxh4#
- 1...f5
- 2.Be3#
- 2.Qc3#
- 2.Qe3#
- 1...Rxh3!
- threat
- 1.Qc6?
- threat
- 2.Sf3#
- 1...Rxh6
- 2.Qe4#
- 1...fxe5
- 2.Sb5#
- 1...bxc6
- 2.Sxc6#
- 1...Bc5
- 2.Qxc5#
- 1...Sd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Rf4!
- threat
- 1.Qxh3?
- Keys
- 1.Qf5!
- threat
- 2.Qf2#
- 1...Sxc4
- 2.Sf3#
- 1...fxe5
- 2.Qxe5#
- 1...Rf4
- 2.Qxf4#
- 1...Re4
- 2.Qxe4#
- 1...Bc5
- 2.Sb5#
- 1...Sd3
- 2.Qxd3#
- 1...Sd5
- 2.Rxd5#
- threat
- 1.Qf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- R(e);SBLOCK::S(B)
- R(e);N_GUARD::QAR(H),XR(e)
- R(e);N_GUARD::QAR(H)
- B(b);N_GUARD::QAB1(H)
- B(b);N_GUARD::QAB1(H),XB(b)
- S(f);N_GUARD::R1(D)
- S(f);OGATE,XP(C)::QAR1(H),XS(f)
- S(f);N_GUARD::R1(D),XS(f)
- S(f);N_GUARD,XQ(H)::R1(D)
- P(g);SBLOCK,XP(E)::S(G)
- Tries
- Try
- Q(H);XP(c)
- Threat
- DUALS(4)
- Vars
- R(e);XB(F)::QAB1(H)
- S(f);N_GUARD::R1(D),XS(f)
- R(e);::QAB1(H)
- Refutation
- R(e);XQ(H)
- Try
- Q(H);
- Threat
- S(B)
- Vars
- R(e);N_GUARD,XB(F)::QAR1(H)
- P(g);SBLOCK,XP(E)::S(G)
- P(h);XQ(H)::S(G),XP(h)
- B(b);N_GUARD::QAB1(H),XB(b)
- Refutation
- R(e);
- Try
- Actual
- Q(H);
- Threat
- QAB(H)
- Vars
- S(f);SBLOCK,XP(C)::S(B)
- P(g);OGATE,XP(E)::QAB1(H),XP(g)
- R(e);N_GUARD::QAR2(H),XR(e)
- R(e);N_GUARD::QAR1(H),XR(e)
- B(b);SBLOCK::S(G)
- S(a);N_GUARD::QAR1(H),XS(a)
- S(f);N_GUARD::R1(D),XS(f)
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).