MESON Chess Problem Database
Problem Display
PID: 50194 (2K2nB1/3NP1R1/1p1k4/1P1p1r1b/2pQ4/5r2/8/2B1R1b1 w - - 0 1)
Prins, Hendrik
Comm., Die Schwalbe, 1989
#2
9 + 9
| 1099 | WCSC | 1989 |
| 5396 | World Chess Solving Championship 1977-1996 | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Rf1
- 2.Ba3#
- 1...Rf2
- 2.Ba3#
- 2.Qxb6#
- 1...Ra3
- 2.Bxa3#
- 1...Re3
- 2.Qxb6#
- 1...R3f4
- 2.Ba3#
- 1...R5f4
- 2.Qe5#
- 2.Qxd5#
- 1...Re5
- 2.Qxe5#
- 1...Rf6
- 2.Qe5#
- 2.Qxd5#
- 1...Rf7
- 2.Qe5#
- 2.e8S#
- 1...Bh2
- 2.Qxb6#
- 1...Be3
- 2.Ba3#
- 1...Bg4
- 2.e8S#
- 1...Bf7
- 2.exf8Q#
- 2.exf8B#
- 1...Se6
- 2.Rxe6#
- 1...Sg6
- 2.Re6#
- 2.e8S#
- 1...Sxd7
- 2.Re6#
- 1...Sh7
- 2.Re6#
- 1...c3
- 2.Ba3#
- 1...Rf1
- Tries
- 1.Sc5?
- threat
- 2.Se4#
- 2.Sb7#
- 1...Bxd4
- 2.Sb7#
- 1...Re3
- 2.Sb7#
- 1...R3f4
- 2.Sb7#
- 1...R5f4
- 2.Sb7#
- 2.Qxd5#
- 1...Re5
- 2.Sb7#
- 1...Rf7
- 2.Sb7#
- 2.e8S#
- 1...Bf7
- 2.Sb7#
- 2.exf8Q#
- 2.exf8B#
- 1...bxc5!
- threat
- 1.Bf4+?
- 1...R5xf4
- 2.Qe5#
- 2.Qxd5#
- 1...Re5
- 2.Bxe5#
- 2.Qxe5#
- 2.Qxd5#
- 2.exf8Q#
- 2.exf8B#
- 1...R3xf4!
- 1...R5xf4
- 1.Bf7?
- threat
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rxf7
- 2.Qe5#
- 2.e8S#
- 1...Bxd4
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bxf7
- 2.exf8Q#
- 2.exf8B#
- 1...Sxd7
- 2.Re6#
- 2.e8S#
- 1...Re5
- 2.Qxe5#
- 1...Be3
- 2.Ba3#
- 2.exf8Q#
- 2.exf8B#
- 1...Se6
- 2.Rxe6#
- 1...Rb3
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rf1
- 2.Ba3#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rf2
- 2.Ba3#
- 2.Qxb6#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Ra3
- 2.Bxa3#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rc3
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rd3
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rg3
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rh3
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...R3f4
- 2.Ba3#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...R5f4
- 2.Qe5#
- 2.Qxd5#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rg5
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rf6
- 2.Qe5#
- 2.Qxd5#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bf2
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bh2
- 2.Qxb6#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bg4
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bg6
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Sg6
- 2.Re6#
- 2.e8S#
- 1...Sh7
- 2.Re6#
- 2.e8S#
- 1...c3
- 2.Ba3#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Re3!
- threat
- 1.Rgxg1?
- threat
- 2.Qxb6#
- 1...Sxd7
- 2.Re6#
- 1...Re5
- 2.Qxe5#
- 1...Se6
- 2.Rxe6#
- 1...Re3!
- threat
- 1.Rg6+?
- 1...Rf6
- 2.Qe5#
- 2.Qxd5#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Se6
- 2.Rexe6#
- 2.Rgxe6#
- 1...Sxg6
- 2.Re6#
- 2.e8S#
- 1...Bxg6!
- 1...Rf6
- 1.Rf7?
- threat
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rxf7
- 2.Qe5#
- 2.e8S#
- 1...Bxd4
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bxf7
- 2.exf8Q#
- 2.exf8B#
- 1...Sxd7
- 2.e8S#
- 1...Re3
- 2.Qxb6#
- 1...Re5
- 2.Qxe5#
- 1...Rb3
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rf1
- 2.Ba3#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rf2
- 2.Ba3#
- 2.Qxb6#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Ra3
- 2.Bxa3#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rc3
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rd3
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rg3
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rh3
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...R3f4
- 2.Ba3#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...R5f4
- 2.Qe5#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rg5
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rf6
- 2.Qe5#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bf2
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bh2
- 2.Qxb6#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bg4
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bg6
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Se6
- 2.e8S#
- 1...Sg6
- 2.e8S#
- 1...Sh7
- 2.e8S#
- 1...c3
- 2.Ba3#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Be3!
- threat
- 1.Qf6+?
- 1...Se6
- 2.Rxe6#
- 2.Qxe6#
- 1...Rxf6!
- 1...Se6
- 1.e8Q?
- threat
- 2.Qe7#
- 1...Re3
- 2.Qxb6#
- 1...Re5
- 2.Qdxe5#
- 2.Qexe5#
- 1...Rf7
- 2.Qde5#
- 2.Qee5#
- 1...Sg6
- 2.Re6#
- 2.Qe6#
- 1...Bxe8!
- threat
- 1.Sc5?
- Keys
- 1.Re3!
- threat
- 2.Ba3#
- 2.Qxb6#
- 1...Rxe3
- 2.Qxb6#
- 1...Bxe3
- 2.Ba3#
- 1...Sxd7
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 2.Qxb6#
- threat
- 1.Re3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- R(b);N_GUARD::B(A)
- R(b);N_GUARD::B(A),XR(b)
- R(b);S_CUTB(a)::QAR2(C),XP(g)
- R(e);N_GUARD::QAB1(C),XR(e)
- B(a);N_GUARD::QAR2(C),XP(g)
- B(a);S_CUTR(b)::B(A)
- B(f);N_GUARD::P=S
- B(f);S_CUTR(e)::PXS(i)=Q
- S(i);N_GUARD::R1(B),XS(i)
- S(i);N_GUARD,XS(E)::R1(B)
- S(i);N_GUARD::R1(B)
- P(c);S_CUTR(b)::B(A)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- B(a);N_SPINP(d),XQ(C)::S(E)
- R(b);::S(E)
- R(e);::S(E)
- Refutation
- P(g);XS(E)
- Try
- B(A);CHECK
- Refutation
- R(b);XB(A)
- Try
- B(I);
- Threat
- DUALS(3)
- Vars
- B(f);XB(I)::PXS(i)=Q
- R(e);N_GUARD::QAB1(C),XR(e)
- S(i);N_GUARD::R1(B),XS(i)
- Refutation
- R(b);
- Try
- R(G);XB(a)
- Threat
- QAR2(C),XP(g)
- Vars
- S(i);N_GUARD,XS(E)::R1(B)
- R(e);N_GUARD::QAB1(C),XR(e)
- S(i);N_GUARD::R1(B),XS(i)
- Refutation
- R(b);
- Try
- R(G);CHECK
- Refutation
- B(f);XR(G)
- Try
- R(G);
- Threat
- DUALS(3)
- Vars
- B(f);XR(G)::PXS(i)=Q
- S(i);XS(E)::P=S
- R(b);S_CUTB(a)::QAR2(C),XP(g)
- R(e);N_GUARD::QAB1(C),XR(e)
- S(i);::P=S
- Refutation
- B(a);
- Try
- Q(C);CHECK,N_PINP(d)
- Refutation
- R(e);XQ(C)
- Try
- P(F);
- Threat
- QAB1(F)
- Vars
- R(b);S_CUTB(a)::QAR2(C),XP(g)
- Refutation
- B(f);XQ(F)
- Try
- Actual
- R(B);
- Threat
- DUALS(2)
- Vars
- R(b);XR(B)::QAR2(C),XP(g)
- B(a);XR(B)::B(A)
- S(i);N_GUARD,XS(E)::R1(B)
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).