MESON Chess Problem Database
Problem Display
PID: 255197 (2b3rr/1p3P2/2P1P1Pp/3PkPNR/4N3/1QP1p2P/4n3/KB2BR2 w - - 0 1)
Maleika, Gerhard
Deutsche Schachzeitung, 1990
#2
16 + 8
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Bg3#
- 1...Sg1
- 2.Bg3#
- 1...Sxc3
- 2.Bxc3#
- 1...Sg3
- 2.Bxg3#
- 1...Sd4
- 2.Bg3#
- 1...Sf4
- 2.Sf3#
- 1...Sc1
- Tries
- 1.Sh7?
- threat
- 2.f6#
- 1...Rxg6
- 2.fxg6#
- 1...Bxe6
- 2.fxe6#
- 1...Sxc3
- 2.Bxc3#
- 1...Sg3
- 2.Bxg3#
- 1...Sd4
- 2.Bg3#
- 1...Sf4!
- threat
- 1.Bg3+?
- 1...Sf4
- 2.Sf3#
- 1...Sxg3!
- 1...Sf4
- 1.d6?
- threat
- 2.Qb5#
- 1...Bxe6
- 2.Qxe6#
- 1...Sxc3
- 2.Bxc3#
- 1...Sf4
- 2.Sf3#
- 1...Sd4
- 2.Bg3#
- 1...b5
- 2.Qxb5#
- 1...bxc6!
- threat
- 1.f6?
- threat
- 2.Sh7#
- 1...Bxe6
- 2.Sxe6#
- 1...Sxc3
- 2.Bxc3#
- 1...hxg5
- 2.Rxg5#
- 1...Sf4
- 2.Sf3#
- 1...Rh7
- 2.Sxh7#
- 1...Sg3
- 2.Bxg3#
- 1...Sd4
- 2.Bg3#
- 1...Rxg6!
- threat
- 1.fxg8Q?
- threat
- 2.Sf7#
- 2.Qg7#
- 2.Qxh8#
- 1...Rxg8
- 2.Sf7#
- 1...Bxe6
- 2.Qxe6#
- 2.Qg7#
- 2.Qxh8#
- 1...Sxc3
- 2.Bxc3#
- 2.Qg7#
- 2.Qxh8#
- 1...hxg5
- 2.Qg7#
- 2.Qxh8#
- 1...Sf4
- 2.Sf3#
- 2.Sf7#
- 1...Rh7!
- threat
- 1.f8Q?
- threat
- 2.Sf7#
- 2.Qd6#
- 2.Qf6#
- 1...Rxg6
- 2.Sf7#
- 2.Qd6#
- 1...Bxe6
- 2.Qd6#
- 2.Qf6#
- 1...Sxc3
- 2.Bxc3#
- 2.Qf6#
- 1...hxg5
- 2.Qd6#
- 2.Qf6#
- 1...Rg7
- 2.Qd6#
- 2.Qxg7#
- 2.Qf6#
- 1...Rh7
- 2.Qd6#
- 2.Qf6#
- 1...Sf4
- 2.Sf3#
- 2.Sf7#
- 2.Qf6#
- 1...Rxf8!
- threat
- 1.f8B?
- threat
- 2.Sf7#
- 2.Bd6#
- 1...Bxe6
- 2.Bd6#
- 1...Sxc3
- 2.Bxc3#
- 1...hxg5
- 2.Bd6#
- 1...Sf4
- 2.Sf3#
- 2.Sf7#
- 1...Rg7
- 2.Bd6#
- 2.Bxg7#
- 1...Rh7
- 2.Bd6#
- 1...Rxf8!
- threat
- 1.Sh7?
- Keys
- 1.Qb5!
- threat
- 2.d6#
- 1...Bxe6
- 2.dxe6#
- 1...Sxc3
- 2.Bxc3#
- 1...bxc6
- 2.dxc6#
- 1...Sf4
- 2.Sf3#
- 1...Sd4
- 2.Bg3#
- threat
- 1.Qb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- S(a);N_GUARD::B(C)
- S(a);OGATE,XP(F)::B(C),XS(a)
- S(a);N_GUARD::B(C),XS(a)
- S(a);SBLOCK::S(K)
- Tries
- Try
- S(K);
- Threat
- R(L)+P(J)
- Vars
- R(g);OGATE,XP(O)::R(L)+P(J),XR(g)
- B(f);OGATE,XP(N)::R(L)+P(J),XB(f)
- S(a);OGATE,XP(F)::B(C),XS(a)
- S(a);N_GUARD::B(C),XS(a)
- S(a);N_GUARD::B(C)
- Refutation
- S(a);
- Try
- B(C);CHECK
- Vars
- S(a);P_SPINS(a)::S(K)
- Refutation
- S(a);XB(C)
- Try
- P(I);
- Threat
- QAR(E)
- Vars
- B(f);OGATE,XP(N)::QAR1(E),XB(f)
- S(a);OGATE,XP(F)::B(C),XS(a)
- S(a);SBLOCK::S(K)
- S(a);N_GUARD::B(C)
- P(e);::QAR(E),XP(e)
- Refutation
- P(e);XP(M)
- Try
- P(J);
- Threat
- R(L)+S(K)
- Vars
- B(f);XP(N)::R(L)+S(K),XB(f)
- S(a);OGATE,XP(F)::B(C),XS(a)
- P(d);OGATE,P_SPINP(d),XS(K)::R(L),XP(d)
- S(a);SBLOCK::R(L)+S(K),DCHECK
- R(h);::R(L)+S(K),XR(h)
- S(a);N_GUARD::B(C),XS(a)
- S(a);N_GUARD::B(C)
- Refutation
- R(g);XP(O)
- Try
- P(P);XR(g)
- Threat
- DUALS(3)
- Vars
- R(h);XQ(P)::S(K)
- Refutation
- R(h);
- Try
- P(P);
- Threat
- DUALS(3)
- Refutation
- R(g);XQ(P)
- Try
- P(P);
- Threat
- DUALS(2)
- Vars
- B(f);XP(N)::B(P)
- S(a);OGATE,XP(F)::B(C),XS(a)
- P(d);XS(K)::B(P)
- R(h);::B(P)
- Refutation
- R(g);XB(P)
- Try
- Actual
- Q(E);
- Threat
- QAR(E)+P(I)
- Vars
- B(f);OGATE,XP(N)::QAR(E)+P(I),XB(f)
- S(a);OGATE,XP(F)::B(C),XS(a)
- P(e);OGATE,XP(M)::QAR(E)+P(I),XP(e)
- S(a);SBLOCK::S(K)
- S(a);N_GUARD::B(C)
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).