MESON Chess Problem Database
Problem Display
PID: 148499 (8/2K2b2/R3pp2/4kB2/2PN3R/1n1p1pP1/6QN/1nB1rq2 w - - 0 1)
Forster, Klaus
4th Prize, The Problemist, 2012
#2
10 + 10
| 56 | The Problemist | 2014 |
| 23 | Die Schwalbe | 2015 |
| 23 | Die Schwalbe | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Shxf3#
- 1...Qh1
- 2.Shxf3#
- 1...Rxc1
- 2.Re4#
- 1...Rd1
- 2.Re4#
- 1...Re4
- 2.Rxe4#
- 1...Bh5
- 2.Rxe6#
- 1...Bg6
- 2.Rxe6#
- 1...Be8
- 2.Rxe6#
- 1...Sa1
- 2.Ra5#
- 1...Sxc1
- 2.Ra5#
- 1...Sd2
- 2.Ra5#
- 1...Sa5
- 2.Rxa5#
- 1...f2
- 2.Shf3#
- 1...Qg1
- Tries
- 1.Bb2?
- threat
- 2.Sg4#
- 1...Sxd4
- 2.Ra5#
- 1...exf5
- 2.Sdxf3#
- 1...Re4
- 2.Rxe4#
- 1...Bh5
- 2.Rxe6#
- 1...Sc3!
- threat
- 1.Bg6?
- threat
- 2.Sc6#
- 1...Bxg6
- 2.Rxe6#
- 1...Sxd4
- 2.Sg4#
- 2.Bf4#
- 1...Be8
- 2.Rxe6#
- 1...Sa5
- 2.Rxa5#
- 1...f5!
- threat
- 1.Bh7?
- threat
- 2.Sc6#
- 1...Sxd4
- 2.Sg4#
- 2.Bf4#
- 1...Bg6
- 2.Rxe6#
- 1...Be8
- 2.Rxe6#
- 1...Sa5
- 2.Rxa5#
- 1...f5!
- threat
- 1.Rf4?
- threat
- 2.Sg4#
- 2.Sc6#
- 1...Sxd4
- 2.Sg4#
- 1...Re4
- 2.Sc6#
- 2.Rxe4#
- 1...Bh5
- 2.Sc6#
- 2.Rxe6#
- 1...Be8
- 2.Sg4#
- 2.Rxe6#
- 1...Sa5
- 2.Sg4#
- 2.Rxa5#
- 1...exf5!
- threat
- 1.Ra5+?
- 1...Sc5
- 2.Rxc5#
- 1...Sxa5!
- 1...Sc5
- 1.Rd6?
- threat
- 2.Sg4#
- 2.Bf4#
- 1...Rxc1
- 2.Sg4#
- 2.Re4#
- 1...Sxc1
- 2.Sg4#
- 1...fxg2
- 2.Sg4#
- 1...exf5
- 2.Sc6#
- 1...Re3
- 2.Sg4#
- 1...Re4
- 2.Rxe4#
- 1...Bh5
- 2.Bf4#
- 2.Rxe6#
- 1...S1d2
- 2.Sg4#
- 1...S3d2
- 2.Sg4#
- 1...d2
- 2.Sg4#
- 1...Sxd4!
- threat
- 1.Qxf3?
- threat
- 2.Sc6#
- 1...Qxf3
- 2.Shxf3#
- 1...Sxd4
- 2.Sg4#
- 1...Be8
- 2.Rxe6#
- 1...Sa5
- 2.Rxa5#
- 1...exf5!
- threat
- 1.Qb2?
- threat
- 2.Sg4#
- 2.Bf4#
- 1...Rxc1
- 2.Sg4#
- 2.Re4#
- 1...Sxc1
- 2.Sg4#
- 2.Ra5#
- 2.Qb5#
- 1...Sxd4
- 2.Ra5#
- 1...exf5
- 2.Sdxf3#
- 1...Qh3
- 2.Shxf3#
- 2.Bf4#
- 1...Re3
- 2.Sg4#
- 1...Re4
- 2.Rxe4#
- 1...Bh5
- 2.Bf4#
- 2.Rxe6#
- 1...S1d2
- 2.Sg4#
- 1...S3d2
- 2.Sg4#
- 2.Ra5#
- 2.Qb5#
- 1...d2
- 2.Sg4#
- 1...Sc3!
- threat
- 1.Qd2?
- threat
- 2.Qf4#
- 1...S3xd2
- 2.Ra5#
- 1...Re4
- 2.Rxe4#
- 1...Re3
- 2.Qxe3#
- 1...S1xd2!
- threat
- 1.Bb2?
- Keys
- 1.Qh3!
- threat
- 2.Sc6#
- 1...Qxh3
- 2.Shxf3#
- 1...Sxd4
- 2.Bf4#
- 1...exf5
- 2.Qxf5#
- 1...Be8
- 2.Rxe6#
- 1...Sa5
- 2.Rxa5#
- threat
- 1.Qh3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 11
- Sets
- Q(c);N_GUARD::S(C),XP(f)
- R(b);N_GUARD,P_PINP(E),XB(A)::R1(G)
- R(b);N_GUARD::R1(G)
- R(b);N_GUARD::R1(G),XR(b)
- B(j);N_GUARD::R1(I),XP(h)
- S(d);N_GUARD::R(I)
- S(d);N_GUARD,XB(A)::R(I)
- S(d);N_GUARD::R(I),XS(d)
- P(f);S_CUTQ(c)::S(C)
- Tries
- Try
- B(A);
- Threat
- S(C)
- Vars
- S(d);N_GUARD,P_SPINS(d),XS(F)::R(I)
- P(h);SBLOCK,XB(H)::B(A)+S(F),DCHECK,XP(f)
- R(b);N_GUARD::R1(G),XR(b)
- B(j);N_GUARD::R1(I),XP(h)
- Refutation
- S(a);
- Try
- B(H);
- Threat
- S(F)
- Vars
- B(j);N_GUARD,XB(H)::R1(I),XP(h)
- B(j);N_GUARD::R1(I),XP(h)
- S(d);N_GUARD::R(I),XS(d)
- Refutation
- P(i);
- Try
- B(H);
- Threat
- S(F)
- Vars
- B(j);N_GUARD::R1(I),XP(h)
- S(d);N_GUARD::R(I),XS(d)
- Refutation
- P(i);
- Try
- R(G);
- Threat
- DUALS(2)
- Vars
- S(d);XS(F)::S(C)
- Refutation
- P(h);XB(H)
- Try
- R(I);CHECK
- Vars
- S(d);N_GUARD,P_SPINS(d)::R(I),XS(d)
- Refutation
- S(d);XR(I)
- Try
- R(I);
- Threat
- DUALS(2)
- Vars
- S(d);XB(A)::S(C)
- P(f);XQ(B)::S(C)
- P(h);SBLOCK,XB(H)::S(F)
- R(b);::S(C)
- R(b);N_GUARD::R1(G),XR(b)
- S(a);::S(C)
- S(d);::S(C)
- P(e);::S(C)
- Refutation
- S(d);XS(F)
- Try
- Q(B);XP(f)
- Threat
- S(F)
- Vars
- Q(c);XQ(B)::S(C),XQ(c)
- S(d);SBLOCK,XS(F)::S(C)
- B(j);N_GUARD::R1(I),XP(h)
- S(d);N_GUARD::R(I),XS(d)
- Refutation
- P(h);XB(H)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- S(d);N_GUARD,P_SPINS(d),XS(F)::R(I)
- P(h);SBLOCK,XB(H)::QAB(B)+S(F),DCHECK,XP(f)
- R(b);::S(C)
- R(b);N_GUARD::R1(G),XR(b)
- S(a);::S(C)
- P(e);::S(C)
- Refutation
- S(a);
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- S(d);N_GUARD,XQ(B)::R(I)
- R(b);N_GUARD::R1(G),XR(b)
- R(b);N_GUARD::QAR2(B),XR(b)
- Refutation
- S(a);XQ(B)
- Try
- Actual
- Q(B);
- Threat
- S(F)
- Vars
- Q(c);N_GUARD,XQ(B)::S(C),XP(f)
- S(d);SBLOCK,XS(F)::B(A)
- P(h);OGATE,XB(H)::QAR1(B),XP(h)
- B(j);N_GUARD::R1(I),XP(h)
- S(d);N_GUARD::R(I),XS(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).