MESON Chess Problem Database
Problem Display
PID: 216405 (BNQ4r/pR5b/2R5/5pKn/r2p1NP1/6B1/8/6qk w - - 0 1)
van Engelen, Adrianus Cornelis
Probleemblad, 1980
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Rxb1#
- 1...Qc1
- 2.Rxc1#
- 1...Qb1
- Tries
- 1.Rc1?
- threat
- 2.Rbb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Rb6#
- 2.Rxa7#
- 2.Rbc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rxh7#
- 2.Qc6#
- 1...Rg8+
- 2.Rg7#
- 1...Qxc1
- 2.Qxc1#
- 1...Rxc8
- 2.Rbc7#
- 1...Sxg3
- 2.Rxh7#
- 1...Sxf4
- 2.Rxh7#
- 1...fxg4
- 2.Rxh7#
- 1...Qd1
- 2.Rxd1#
- 1...Qe1
- 2.Rxe1#
- 1...Qf1
- 2.Rxf1#
- 1...Ra2
- 2.Rb2#
- 1...Ra3
- 2.Rb3#
- 1...Rb4
- 2.Rxb4#
- 2.Rb5#
- 2.Rb6#
- 2.Qc6#
- 1...Ra5
- 2.Rb5#
- 1...Ra6
- 2.Rb6#
- 1...Rd8
- 2.Rd7#
- 1...Re8
- 2.Re7#
- 1...Bg6
- 2.Rbb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Rb6#
- 2.Rxa7#
- 2.Rbc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qc6#
- 1...Bg8
- 2.Rf7#
- 1...Sf6
- 2.Rxh7#
- 1...Sg7
- 2.Rbb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Rb6#
- 2.Rxa7#
- 2.Rbc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rxg7#
- 2.Qc6#
- 1...d3
- 2.Rb4#
- 1...a5
- 2.Rbb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Rb6#
- 2.Ra7#
- 2.Rbc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rxh7#
- 2.Qc6#
- 1...a6
- 2.Rbb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Rb6#
- 2.Ra7#
- 2.Rbc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rxh7#
- 2.Qc6#
- 1...Rc4!
- threat
- 1.Rc1?
- Keys
- 1.Rb1!
- threat
- 2.Rcc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rc5#
- 2.Ra6#
- 2.Rcb6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rc7#
- 1...Rg8+
- 2.Rg6#
- 1...Qxb1
- 2.Rc1#
- 1...Rxc8
- 2.Rc7#
- 2.Rxc8#
- 1...Sxg3
- 2.Rh6#
- 1...Sxf4
- 2.Rh6#
- 1...fxg4
- 2.Rg6#
- 1...Qc1
- 2.Rbxc1#
- 2.Rcxc1#
- 1...Qd1
- 2.Rxd1#
- 1...Qe1
- 2.Rxe1#
- 1...Qf1
- 2.Rxf1#
- 1...Ra2
- 2.Rc2#
- 1...Ra3
- 2.Rc3#
- 1...Rb4
- 2.Rb6#
- 1...Rc4
- 2.Rxc4#
- 2.Rc5#
- 1...Ra5
- 2.Rc5#
- 1...Ra6
- 2.Rxa6#
- 2.Rcb6#
- 1...Rd8
- 2.Rd6#
- 1...Re8
- 2.Re6#
- 1...Bg6
- 2.Rcc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rc5#
- 2.Ra6#
- 2.Rcb6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 2.Rc7#
- 1...Bg8
- 2.Re6#
- 1...Sf6
- 2.Rxf6#
- 1...d3
- 2.Rc4#
- 1...a6
- 2.Rcc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rxa6#
- 2.Rcb6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rc7#
- threat
- 1.Rb1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 16
- REMOVED MATES = 1
- Sets
- Q(a);OGATEB::R(F),XQ(a)
- Q(a);OGATEB,P_PINS(B)::R(E),XQ(a)
- Tries
- Try
- R(E);P_PINQ(a)
- Threat
- DUALS(14)
- Vars
- R(i);CHECK::B(G)+R(F)
- Q(a);N_SPINQ(a),OGATE,P_PINS(B),XR(E)::QAR(I),XQ(a)
- R(i);XQ(I)::B(G)+R(F)
- S(f);XB(A)::B(G)+R(F),DCHECK,XB(h)
- S(f);XS(B)::B(G)+R(F),DCHECK,XB(h)
- P(e);XP(C)::B(G)+R(F),XB(h)
- Q(a);OGATEB::R(E),XQ(a)
- R(c);::B(G)+R(F)
- R(i);::B(G)+R(F)
- B(h);::B(G)+R(F)
- S(f);::B(G)+R(F),DCHECK,XB(h)
- P(d);::B(G)+R(F)
- Refutation
- R(c);
- Try
- Actual
- R(F);P_PINQ(a)
- Threat
- DUALS(13)
- Vars
- R(i);CHECK::B(G)+R(E)
- Q(a);N_SPINQ(a),XR(F)::B(G)+R(E),DCHECK
- S(f);XB(A)::B(G)+R(E),DCHECK
- S(f);XS(B)::B(G)+R(E),DCHECK
- P(e);XP(C)::B(G)+R(E)
- Q(a);OGATEB::R(F),XQ(a)
- R(c);::B(G)+R(E)
- R(i);::B(G)+R(E)
- B(h);::B(G)+R(E)
- S(f);::B(G)+R(E),XS(f)
- P(d);::B(G)+R(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).