MESON Chess Problem Database
Problem Display
PID: 235177 (2n3NR/BR3pp1/2Np1p2/7Q/2p1k1p1/4P3/4P3/K7 w - - 0 1)
Groeneveld, Cornelis
Schach, 1955
#2
9 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Sb6
- 2.Re7#
- 1...Sxa7
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...c3
- 2.Rb4#
- 1...g3
- 2.Qf3#
- 1...d5
- 2.Qxg4#
- 1...f5
- 2.Qh1#
- 1...g6
- 2.Sxf6#
- 1...Sb6
- Tries
- 1.Kb1?
- 1...Sxa7
- 2.Re7#
- 1...Sb6
- 2.Re7#
- 1...f5
- 2.Qh1#
- 1...Se7
- 2.Rxe7#
- 1...c3
- 2.Rb4#
- 1...g3
- 2.Qf3#
- 1...d5
- 2.Qxg4#
- 1...g6
- 2.Sxf6#
- 1...g5!
- 1...Sxa7
- 1.Ka2?
- 1...Sxa7
- 2.Re7#
- 1...Sb6
- 2.Re7#
- 1...f5
- 2.Qh1#
- 1...Se7
- 2.Rxe7#
- 1...c3
- 2.Rb4#
- 1...g3
- 2.Qf3#
- 1...d5
- 2.Qxg4#
- 1...g6
- 2.Sxf6#
- 1...g5!
- 1...Sxa7
- 1.Sh6?
- threat
- 2.Qh1#
- 2.Qf5#
- 1...Sxa7
- 2.Re7#
- 2.Re8#
- 1...Sb6
- 2.Re7#
- 2.Re8#
- 1...f5
- 2.Qh1#
- 2.Qxf5#
- 1...g5
- 2.Qh1#
- 1...Se7
- 2.Rxe7#
- 2.Qh1#
- 1...g3
- 2.Qf3#
- 2.Qf5#
- 1...g6
- 2.Qh1#
- 1...gxh6!
- threat
- 1.Rh6?
- 1...Sxa7
- 2.Re7#
- 1...gxh6
- 2.Sxf6#
- 1...Sb6
- 2.Re7#
- 1...f5
- 2.Qh1#
- 1...c3
- 2.Rb4#
- 1...Se7
- 2.Rxe7#
- 1...g3
- 2.Qf3#
- 1...d5
- 2.Qxg4#
- 1...g6
- 2.Sxf6#
- 1...g5!
- 1...Sxa7
- 1.Rh7?
- 1...Sxa7
- 2.Re7#
- 1...Sb6
- 2.Re7#
- 1...f5
- 2.Qh1#
- 1...c3
- 2.Rb4#
- 1...Se7
- 2.Rxe7#
- 1...g3
- 2.Qf3#
- 1...d5
- 2.Qxg4#
- 1...g6
- 2.Sxf6#
- 1...g5!
- 1...Sxa7
- 1.Kb1?
- Keys
- 1.Qb5!
- 1...Sxa7
- 2.Re7#
- 1...Sb6
- 2.Re7#
- 1...d5
- 2.Qb1#
- 1...c3
- 2.Qd3#
- 1...Se7
- 2.Rxe7#
- 1...g3
- 2.Rh4#
- 1...f5
- 2.Qxc4#
- 1...g5
- 2.Sxf6#
- 1...g6
- 2.Sxf6#
- 1...Sxa7
- 1.Qb5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(h);N_GUARD::R(G)
- S(h);N_GUARD,XB(F)::R(G)
- S(h);N_GUARD::R(G),XS(h)
- P(a);OGATEB::R(G)
- P(c);OGATE::QAB1(D)
- P(d);SBLOCK::QAR2(D),XP(c)
- P(e);SBLOCK::QAB(D)
- P(g);N_GUARD::S(H),XP(e)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- S(h);N_GUARD,XB(F)::R(G)
- S(h);N_GUARD::R(G)
- P(e);SBLOCK::QAB(D)
- S(h);N_GUARD::R(G),XS(h)
- P(a);OGATEB::R(G)
- P(c);OGATE::QAB1(D)
- P(d);SBLOCK::QAR2(D),XP(c)
- P(g);N_GUARD::S(H),XP(e)
- Refutation
- P(g);
- Try
- K(A);P-FLIGHT
- Vars
- S(h);N_GUARD,XB(F)::R(G)
- S(h);N_GUARD::R(G)
- P(e);SBLOCK::QAB(D)
- S(h);N_GUARD::R(G),XS(h)
- P(a);OGATEB::R(G)
- P(c);OGATE::QAB1(D)
- P(d);SBLOCK::QAR2(D),XP(c)
- P(g);N_GUARD::S(H),XP(e)
- Refutation
- P(g);
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- P(g);::QAB(D)
- Refutation
- P(g);XS(H)
- Try
- R(I);
- Vars
- S(h);N_GUARD,XB(F)::R(G)
- P(g);N_GUARD,XR(I)::S(H),XP(e)
- S(h);N_GUARD::R(G)
- P(e);SBLOCK::QAB(D)
- P(a);OGATEB::R(G)
- S(h);N_GUARD::R(G),XS(h)
- P(c);OGATE::QAB1(D)
- P(d);SBLOCK::QAR2(D),XP(c)
- P(g);N_GUARD::S(H),XP(e)
- Refutation
- P(g);
- Try
- R(I);
- Vars
- S(h);N_GUARD,XB(F)::R(G)
- S(h);N_GUARD::R(G)
- P(e);SBLOCK::QAB(D)
- P(a);OGATEB::R(G)
- S(h);N_GUARD::R(G),XS(h)
- P(c);OGATE::QAB1(D)
- P(d);SBLOCK::QAR2(D),XP(c)
- P(g);N_GUARD::S(H),XP(e)
- Refutation
- P(g);
- Try
- Actual
- Q(D);
- Vars
- S(h);N_GUARD,XB(F)::R(G)
- S(h);N_GUARD::R(G)
- P(d);SBLOCK::QAB(D)
- P(a);OGATE::QAB1(D)
- S(h);N_GUARD::R(G),XS(h)
- P(c);OGATEB::R(I)
- P(e);SBLOCK::QAR2(D),XP(a)
- P(g);N_GUARD::S(H),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).