MESON Chess Problem Database
Problem Display
PID: 121854 (4bN1B/2n2B2/q5n1/1Rb1Q3/3Np2k/7P/2p2PK1/8 w - - 0 1)
Verdonk, Johannes Bernardus
Probleemblad, 1974
#2
9 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxb5
- 2.Sxg6#
- 2.Bf6#
- 1...Qb7
- 2.Sxg6#
- 2.Bf6#
- 1...Qc8
- 2.Sxg6#
- 2.Bf6#
- 1...Qa1
- 2.Sxg6#
- 2.Bf6#
- 1...Qa2
- 2.Sxg6#
- 2.Bf6#
- 1...Qa3
- 2.Sxg6#
- 2.Bf6#
- 1...Qa4
- 2.Sxg6#
- 2.Bf6#
- 1...Qa5
- 2.Sxg6#
- 2.Bf6#
- 1...Qf6
- 2.Bxf6#
- 1...Qa7
- 2.Sxg6#
- 2.Bf6#
- 1...Qa8
- 2.Sxg6#
- 2.Bf6#
- 1...Ba3
- 2.Qg3#
- 2.Qg5#
- 2.Qh5#
- 1...Bb4
- 2.Qg3#
- 2.Qg5#
- 2.Qh5#
- 1...Bxd4
- 2.Qg3#
- 2.Qg5#
- 2.Qh5#
- 1...Bb6
- 2.Sxg6#
- 2.Bf6#
- 2.Qg3#
- 2.Qf6#
- 2.Qg5#
- 2.Qh5#
- 1...Bd6
- 2.Sxg6#
- 2.Bf6#
- 2.Qf6#
- 2.Qg5#
- 2.Qh5#
- 1...Ba7
- 2.Qg3#
- 2.Qg5#
- 2.Qh5#
- 1...Be7
- 2.Qg3#
- 2.Qh5#
- 1...Bxf8
- 2.Qg3#
- 2.Qg5#
- 2.Qh5#
- 1...Bc6
- 2.Sxg6#
- 2.Bf6#
- 1...Sf4+
- 2.Qxf4#
- 1...Se7
- 2.Qg3#
- 2.Qf4#
- 2.Qh5#
- 1...Sxf8
- 2.Qg3#
- 2.Qf4#
- 2.Qh5#
- 1...Sxh8
- 2.Qg3#
- 2.Qf4#
- 2.Qh5#
- 1...Se6
- 2.Sxg6#
- 1...e3
- 2.Sf3#
- 1...Qxb5
- Tries
- 1.Sc6?
- threat
- 2.Sxg6#
- 2.Bf6#
- 1...Sf4+
- 2.Qxf4#
- 1...Bxf8
- 2.Bf6#
- 2.Qg3#
- 2.Qf6#
- 2.Qg5#
- 2.Qh5#
- 1...Bxf7
- 2.Bf6#
- 1...Sxe5
- 2.Bf6#
- 1...Sxf8
- 2.Bf6#
- 2.Qg3#
- 2.Qf4#
- 2.Qf6#
- 2.Qh5#
- 1...Sxh8
- 2.Qg3#
- 2.Qf4#
- 2.Qf6#
- 2.Qh5#
- 1...c1Q
- 2.Sxg6#
- 1...c1B
- 2.Sxg6#
- 1...Be3
- 2.Sxg6#
- 2.Qg3#
- 2.Qh5#
- 1...Be7
- 2.Sxg6#
- 2.Qg3#
- 2.Qh5#
- 1...Se7
- 2.Bf6#
- 2.Qg3#
- 2.Qf4#
- 2.Qf6#
- 2.Qh5#
- 1...Sd5
- 2.Sxg6#
- 1...Se6
- 2.Sxg6#
- 1...Qxc6!
- threat
- 1.Sde6?
- threat
- 2.Sxg6#
- 2.Bf6#
- 2.Qg5#
- 1...Sf4+
- 2.Qxf4#
- 1...Bxf8
- 2.Bf6#
- 2.Qg3#
- 2.Qf6#
- 2.Qg5#
- 2.Qh5#
- 1...Bxf7
- 2.Bf6#
- 2.Qg5#
- 1...Sxe5
- 2.Bf6#
- 1...Sxf8
- 2.Bf6#
- 2.Qg3#
- 2.Qf4#
- 2.Qf6#
- 2.Qxe4#
- 2.Qg5#
- 2.Qh5#
- 1...Sxh8
- 2.Qg3#
- 2.Qf4#
- 2.Qf6#
- 2.Qxh8#
- 2.Qxe4#
- 2.Qg5#
- 2.Qh5#
- 1...Sxe6
- 2.Sxg6#
- 1...c1Q
- 2.Sxg6#
- 1...c1B
- 2.Sxg6#
- 1...Be3
- 2.Sxg6#
- 2.Qg3#
- 2.Qh5#
- 1...Be7
- 2.Sxg6#
- 2.Qg3#
- 2.Qh5#
- 1...Se7
- 2.Bf6#
- 2.Qg3#
- 2.Qf4#
- 2.Qf6#
- 2.Qxe4#
- 2.Qg5#
- 2.Qh5#
- 1...Sd5
- 2.Sxg6#
- 2.Qg5#
- 1...Qxe6!
- threat
- 1.Sc6?
- Keys
- 1.f4!
- threat
- 2.Qg5#
- 1...Sxf4+
- 2.Qxf4#
- 1...exf4 ep+
- 2.Sxf3#
- 1...Sxe5
- 2.Sf5#
- 1...Qf6
- 2.Bxf6#
- 1...Be7
- 2.Qh5#
- 1...Se6
- 2.Sxg6#
- threat
- 1.f4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- Q(e);N_GUARD::B(I),XQ(e)
- S(f);CHECK,N_GUARD::QAR2(F),XS(f)
- S(g);S_CUTQ(e)::S(H),XS(f)
- P(b);N_GUARD::S(D)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- S(f);CHECK,N_GUARD::QAR2(F),XS(f)
- B(h);XB(G)::B(I)
- S(f);XQ(F)::B(I)
- P(a);::S(H),XS(f)
- S(g);::S(H),XS(f)
- Refutation
- Q(e);XS(D)
- Try
- S(D);
- Threat
- DUALS(3)
- Vars
- S(f);CHECK,N_GUARD::QAR2(F),XS(f)
- S(f);XQ(F)::B(I)
- S(g);XS(D)::S(H),XS(f)
- P(a);::S(H),XS(f)
- Refutation
- Q(e);XS(D)
- Try
- Actual
- P(A);
- Threat
- QAB1(F)
- Vars
- S(f);CHECK,OGATE,XP(A)::QAR2(F),XS(f)
- P(b);CHECK,EP,N_GUARD,XP(A)::S(D),XP(b)
- S(f);XQ(F)::S(D)
- Q(e);N_GUARD::B(I),XQ(e)
- B(d);::QAR1(F)
- S(g);S_CUTQ(e)::S(H),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).