MESON Chess Problem Database
Problem Display
PID: 216864 (1Q6/3pq3/3r4/3b3n/1N2k1B1/3p3N/3P4/B5K1 w - - 0 1)
Groeneveld, Cornelis
Suomen Shakki, 1954
#2
7 + 7
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ra6
- 2.Sf2#
- 1...Rb6
- 2.Sf2#
- 1...Rc6
- 2.Sf2#
- 1...Re6
- 2.Sf2#
- 1...Rf6
- 2.Sg5#
- 1...Rg6
- 2.Sf2#
- 1...Rh6
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Ra6
- Tries
- 1.Qxd6?
- threat
- 2.Sf2#
- 2.Qxd5#
- 2.Qg6#
- 1...Qh4
- 2.Qe5#
- 2.Qxd5#
- 2.Qg6#
- 1...Qg5
- 2.Sf2#
- 2.Sxg5#
- 1...Qf6
- 2.Qxd5#
- 1...Qf8
- 2.Sg5#
- 2.Qe5#
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qe6
- 2.Sf2#
- 2.Sg5#
- 1...Qf7
- 2.Sg5#
- 2.Qe5#
- 1...Qg7
- 2.Sf2#
- 2.Qxd5#
- 1...Qh7
- 2.Sf2#
- 2.Sg5#
- 2.Qe5#
- 2.Qxd5#
- 1...Qe8
- 2.Sf2#
- 2.Sg5#
- 2.Qxd5#
- 1...Ba2
- 2.Sf2#
- 2.Qxd3#
- 2.Qd4#
- 2.Qg6#
- 1...Bb3
- 2.Sf2#
- 2.Qxd3#
- 2.Qd4#
- 2.Qg6#
- 1...Bc4
- 2.Sf2#
- 2.Qd4#
- 2.Qg6#
- 1...Bc6
- 2.Sf2#
- 2.Qxe7#
- 2.Qxd3#
- 2.Qd4#
- 2.Qg6#
- 1...Be6
- 2.Sf2#
- 2.Qe5#
- 2.Qxd3#
- 2.Qd4#
- 1...Bb7
- 2.Sf2#
- 2.Qxe7#
- 2.Qxd3#
- 2.Qd4#
- 2.Qg6#
- 1...Bf7
- 2.Sf2#
- 2.Qxd3#
- 2.Qd4#
- 1...Ba8
- 2.Sf2#
- 2.Qxe7#
- 2.Qxd3#
- 2.Qd4#
- 2.Qg6#
- 1...Bg8
- 2.Sf2#
- 2.Qxd3#
- 2.Qd4#
- 2.Qg6#
- 1...Sg3
- 2.Sf2#
- 2.Qf4#
- 2.Qxd5#
- 1...Sf4
- 2.Sf2#
- 2.Qxf4#
- 1...Sf6
- 2.Sf2#
- 2.Sg5#
- 2.Qf4#
- 1...Sg7
- 2.Sf2#
- 2.Qf4#
- 2.Qxd5#
- 1...Qxd6!
- threat
- 1.Qa7?
- threat
- 2.Qe3#
- 2.Qd4#
- 1...Qg5
- 2.Qd4#
- 1...Qf6
- 2.Qe3#
- 1...Qe5
- 2.Qe3#
- 1...Qg7
- 2.Qe3#
- 1...Ba2
- 2.Qe3#
- 1...Bb3
- 2.Qe3#
- 1...Bc4
- 2.Qe3#
- 1...Bc6
- 2.Qe3#
- 1...Be6
- 2.Qe3#
- 1...Bb7
- 2.Qe3#
- 1...Bf7
- 2.Qe3#
- 1...Ba8
- 2.Qe3#
- 1...Bg8
- 2.Qe3#
- 1...Rb6!
- threat
- 1.Qb6?
- threat
- 2.Qe3#
- 2.Qd4#
- 1...Qg5
- 2.Qd4#
- 1...Qf6
- 2.Qe3#
- 1...Qe5
- 2.Qe3#
- 1...Qg7
- 2.Qe3#
- 1...Ba2
- 2.Qe3#
- 1...Bb3
- 2.Qe3#
- 1...Bc4
- 2.Qe3#
- 1...Bc6
- 2.Qe3#
- 1...Be6
- 2.Qe3#
- 1...Bb7
- 2.Qe3#
- 1...Bf7
- 2.Qe3#
- 1...Ba8
- 2.Qe3#
- 1...Bg8
- 2.Qe3#
- 1...Rxb6!
- threat
- 1.Qxd6?
- Keys
- 1.Qb5!
- threat
- 2.Qxd3#
- 1...Ba2
- 2.Qf5#
- 1...Bb3
- 2.Qf5#
- 1...Bc4
- 2.Qf5#
- 1...Bc6
- 2.Qf5#
- 1...Be6
- 2.Qe5#
- 1...Bb7
- 2.Qf5#
- 1...Bf7
- 2.Qf5#
- 1...Ba8
- 2.Qf5#
- 1...Bg8
- 2.Qf5#
- 1...Sf4
- 2.Sf2#
- threat
- 1.Qb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 7
- Sets
- R(e);::S(D)
- R(e);S_CUTQ(g)::S(D)
- R(e);P_PINB(F)::S(D)
- S(d);SBLOCK::S(D)
- Tries
- Try
- Q(G);XR(e)
- Threat
- DUALS(3)
- Vars
- Q(g);::QAB1(G),XB(c)
- Q(g);N_GUARD::QAR1(G),XQ(g)
- Refutation
- Q(g);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- Q(g);P_PINB(F)::QAR1(G)
- Q(g);::QAR1(G)
- B(c);::QAR1(G)
- Refutation
- R(e);
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- Q(g);P_PINB(F)::QAR1(G)
- Q(g);::QAR1(G)
- B(c);::QAR1(G)
- Refutation
- R(e);XQ(G)
- Try
- Actual
- Q(G);
- Threat
- QAB1(G),XP(a)
- Vars
- B(c);OGATE::QAB1(G)
- B(c);OGATE::QAR1(G)
- S(d);SBLOCK::S(D)
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).