MESON Chess Problem Database
Problem Display
PID: 234192 (1KN5/5Qpr/1p1B1p2/3R2bR/1rk5/1p2P3/1Pq5/1B6 w - - 0 1)
Ahues, Herbert Siegfried Oskar
Stern, 1989
#2
9 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Rc5#
- 1...Qd3
- 2.Bxd3#
- 2.Rc5#
- 1...Qe4
- 2.Rc5#
- 1...Qf5
- 2.Rc5#
- 2.Rxf5#
- 1...Qg6
- 2.Rc5#
- 1...Qc1
- 2.Bd3#
- 2.Ra5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rdxg5#
- 1...Qxb2
- 2.Rc5#
- 1...Qd2
- 2.Rc5#
- 1...Qe2
- 2.Ra5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rdxg5#
- 1...Qf2
- 2.Bd3#
- 2.Ra5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rdxg5#
- 1...Qg2
- 2.Bd3#
- 2.Rc5#
- 1...Qh2
- 2.Bd3#
- 2.Ra5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rdxg5#
- 1...Qc3
- 2.Ra5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rdxg5#
- 1...Ra4
- 2.Sxb6#
- 1...Rb5
- 2.Rd4#
- 1...Bxe3
- 2.Rd1#
- 2.Rd2#
- 1...Bf4
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Qc7#
- 1...Bh4
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Qc7#
- 1...Bh6
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Qc7#
- 1...b5
- 2.Sb6#
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 1...Qd1
- Tries
- 1.Sa7?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 1...Qxb2
- 2.Rd3#
- 2.Rc5#
- 1...Bxe3
- 2.Rd1#
- 2.Rd2#
- 1...Qd1
- 2.Rxd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rc5#
- 1...Qd3
- 2.Bxd3#
- 2.Rxd3#
- 2.Rd4#
- 2.Rc5#
- 1...Qe4
- 2.Rd4#
- 2.Rc5#
- 1...Qf5
- 2.Rd4#
- 2.Rc5#
- 2.Rxf5#
- 1...Qg6
- 2.Rd4#
- 2.Rc5#
- 1...Qd2
- 2.Rxd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rc5#
- 1...Qg2
- 2.Bd3#
- 2.Rd4#
- 2.Rc5#
- 1...Rb5
- 2.Rd4#
- 1...g6
- 2.Rd4#
- 1...Rh8+!
- threat
- 1.Bxc2?
- threat
- 2.Bd3#
- 2.Ra5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rdxg5#
- 1...Bxe3
- 2.Bd3#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 1...Ra4
- 2.Sxb6#
- 2.Bd3#
- 2.Ra5#
- 2.Re5#
- 2.Rf5#
- 2.Rdxg5#
- 1...Rb5
- 2.Bd3#
- 2.Rd4#
- 1...Bf4
- 2.Bd3#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rde5#
- 2.Rdf5#
- 2.Rdg5#
- 2.Qc7#
- 1...Bh4
- 2.Bd3#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rde5#
- 2.Rdf5#
- 2.Rdg5#
- 2.Qc7#
- 1...Bh6
- 2.Bd3#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rde5#
- 2.Rdf5#
- 2.Rdg5#
- 2.Qc7#
- 1...b5
- 2.Sb6#
- 2.Bd3#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rdxg5#
- 1...f5
- 2.Bd3#
- 2.Ra5#
- 2.Rc5#
- 2.Re5#
- 2.Rxf5#
- 1...g6
- 2.Bd3#
- 2.Rc5#
- 1...bxc2!
- threat
- 1.Be7?
- threat
- 2.Sd6#
- 1...Qh2+
- 2.Re5#
- 1...Bf4+
- 2.Rd6#
- 1...Qxb2
- 2.Rc5#
- 1...Ra4
- 2.Sxb6#
- 1...Rb5
- 2.Rd4#
- 1...Rh8!
- threat
- 1.Qb7?
- threat
- 2.Qc6#
- 1...Rb5
- 2.Rd4#
- 1...Bxe3!
- threat
- 1.Sa7?
- Keys
- 1.Bf8!
- threat
- 2.Sd6#
- 1...Qh2+
- 2.Re5#
- 1...Bf4+
- 2.Rd6#
- 1...Qxb2
- 2.Rc5#
- 1...Ra4
- 2.Sxb6#
- 1...Rb5
- 2.Rd4#
- threat
- 1.Bf8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- Q(a);::QAB(G)+R(D),DCHECK
- Q(a);XP(B)::QAB(G)+R(D),DCHECK
- R(c);N_GUARD::S(I),XP(f)
- R(c);SBLOCK::QAB(G)+R(D),DCHECK
- Tries
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- R(c);::QAB(G)+R(D),DCHECK
- P(h);::QAB(G)+R(D),DCHECK
- Refutation
- R(i);CHECK
- Try
- B(A);XQ(a)
- Threat
- DUALS(6)
- Refutation
- P(b);XB(A)
- Try
- B(F);
- Threat
- S(I)
- Vars
- Q(a);CHECK::QAB(G)+R(D)
- B(e);CHECK::QAB(G)+R(D)
- Q(a);XP(B)::QAB(G)+R(D),DCHECK
- R(c);N_GUARD::S(I),XP(f)
- R(c);SBLOCK::QAB(G)+R(D),DCHECK
- Refutation
- R(i);P_PINS(I)
- Try
- Q(G);
- Threat
- QAR2(G)
- Vars
- R(c);SBLOCK::R1(D)
- Refutation
- B(e);XP(C)
- Try
- Actual
- B(F);
- Threat
- S(I)
- Vars
- Q(a);CHECK::QAB(G)+R(D)
- B(e);CHECK::QAB(G)+R(D)
- Q(a);XP(B)::QAB(G)+R(D),DCHECK
- R(c);N_GUARD::S(I),XP(f)
- R(c);SBLOCK::QAB(G)+R(D),DCHECK
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).