MESON Chess Problem Database
Problem Display
PID: 149159 (1B2q1r1/7r/3N4/Rb2kB2/5N1Q/2K1n3/8/n3R1b1 w - - 0 1)
Dehler, Otto Georg Edgar
Source?, 1924
#2
8 + 8
| 15148 | Sadier Collection | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Qh5
- 2.Rxb5#
- 1...Qg6
- 2.Rxb5#
- 1...Qe7
- 2.Rxb5#
- 1...Qd8
- 2.Rxb5#
- 1...Qf8
- 2.Rxb5#
- 1...Rd7
- 2.Rxb5#
- 1...Bh2
- 2.Rxe3#
- 1...Qh5
- Tries
- 1.Sg6+?
- 1...Qxg6
- 2.Rxb5#
- 2.Qd4#
- 1...Rxg6
- 2.Qd4#
- 1...Kd5!
- 1...Qxg6
- 1.Bb1?
- threat
- 2.Sc4#
- 2.Sf7#
- 1...Qc6+
- 2.Sc4#
- 1...Qc8+
- 2.Sc4#
- 1...Rc7+
- 2.Sc4#
- 1...Qxb8
- 2.Sc4#
- 1...Rxh4
- 2.Sxe8#
- 1...Rg5
- 2.Qxg5#
- 1...Qf7
- 2.Sc4#
- 2.Sxf7#
- 1...Rf7
- 2.Sc4#
- 2.Sxf7#
- 1...Sc2!
- threat
- 1.Bc2?
- threat
- 2.Sc4#
- 2.Sf7#
- 1...Qc6+
- 2.Sc4#
- 1...Qc8+
- 2.Sc4#
- 1...Rc7+
- 2.Sc4#
- 1...Qxb8
- 2.Sc4#
- 1...Rxh4
- 2.Sxe8#
- 1...Rg5
- 2.Qxg5#
- 1...Qf7
- 2.Sc4#
- 2.Sxf7#
- 1...Rf7
- 2.Sc4#
- 2.Sxf7#
- 1...Sxc2!
- threat
- 1.Bg6?
- threat
- 2.Sc4#
- 2.Sf7#
- 2.Qg5#
- 1...Qc6+
- 2.Sc4#
- 1...Qc8+
- 2.Sc4#
- 1...Rc7+
- 2.Sc4#
- 1...Qxg6
- 2.Rxb5#
- 1...Qxb8
- 2.Sc4#
- 1...Rxh4
- 2.Sxe8#
- 1...Qd7
- 2.Sc4#
- 2.Sf7#
- 1...Qf7
- 2.Sc4#
- 2.Sxf7#
- 1...Qe6
- 2.Sc4#
- 2.Sf7#
- 1...Qe7
- 2.Sc4#
- 2.Sf7#
- 2.Rxb5#
- 1...Qd8
- 2.Sc4#
- 2.Sf7#
- 2.Rxb5#
- 1...Qf8
- 2.Sc4#
- 2.Sf7#
- 2.Rxb5#
- 1...Rh5
- 2.Sc4#
- 2.Sf7#
- 2.Sc8#
- 2.Sxe8#
- 1...Rf7
- 2.Sc4#
- 2.Sxf7#
- 1...Rf8
- 2.Sc4#
- 2.Sf7#
- 1...Rxg6!
- threat
- 1.Bxh7?
- threat
- 2.Sc4#
- 2.Sf7#
- 2.Sc8#
- 2.Sxe8#
- 1...Qc6+
- 2.Sc4#
- 1...Qc8+
- 2.Sc4#
- 2.Sxc8#
- 1...Qxb8
- 2.Sc4#
- 2.Sf7#
- 1...Rg5
- 2.Sxe8#
- 2.Qxg5#
- 1...Qh5
- 2.Sc4#
- 2.Sf7#
- 2.Sc8#
- 2.Se8#
- 2.Rxb5#
- 1...Qg6
- 2.Rxb5#
- 1...Qd7
- 2.Sc4#
- 2.Sf7#
- 1...Qf7
- 2.Sc4#
- 2.Sxf7#
- 1...Qe6
- 2.Sc4#
- 2.Sf7#
- 1...Qe7
- 2.Sc4#
- 2.Sf7#
- 2.Rxb5#
- 1...Qd8
- 2.Sc4#
- 2.Sf7#
- 2.Rxb5#
- 1...Qf8
- 2.Sc4#
- 2.Sf7#
- 2.Rxb5#
- 1...Rg7
- 2.Sc4#
- 2.Sf7#
- 1...Rg6!
- threat
- 1.Qg5?
- threat
- 2.Sc4#
- 2.Sf7#
- 2.Bg6#
- 1...Qc6+
- 2.Sc4#
- 1...Qc8+
- 2.Sc4#
- 1...Rc7+
- 2.Sc4#
- 1...Qxb8
- 2.Sc4#
- 1...Qh5
- 2.Sc4#
- 2.Sf7#
- 2.Rxb5#
- 1...Qg6
- 2.Sc4#
- 2.Sf7#
- 2.Bxg6#
- 2.Rxb5#
- 1...Qd7
- 2.Sc4#
- 2.Sf7#
- 1...Qf7
- 2.Sc4#
- 2.Sxf7#
- 1...Qe6
- 2.Sc4#
- 2.Sf7#
- 1...Qe7
- 2.Sc4#
- 2.Sf7#
- 2.Rxb5#
- 1...Qd8
- 2.Sc4#
- 2.Sf7#
- 2.Rxb5#
- 1...Qf8
- 2.Sc4#
- 2.Sf7#
- 2.Rxb5#
- 1...Rh5
- 2.Sc4#
- 2.Sf7#
- 2.Sc8#
- 2.Sxe8#
- 1...Rf7
- 2.Sc4#
- 2.Sxf7#
- 1...Rg6
- 2.Sc4#
- 2.Sf7#
- 2.Bxg6#
- 1...Rf8
- 2.Sc4#
- 2.Sf7#
- 1...Rxg5!
- threat
- 1.Sg6+?
- Keys
- 1.Bd3!
- threat
- 2.Sc4#
- 2.Sf7#
- 1...Qc6+
- 2.Sc4#
- 1...Qc8+
- 2.Sc4#
- 1...Rc7+
- 2.Sc4#
- 1...Qxb8
- 2.Sc4#
- 1...Rxh4
- 2.Sxe8#
- 1...Rg5
- 2.Qxg5#
- 1...Qf7
- 2.Sc4#
- 2.Sxf7#
- 1...Rf7
- 2.Sc4#
- 2.Sxf7#
- threat
- 1.Bd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 7
- Sets
- Q(g);N_GUARD::R(E),XB(d)
- R(f);S_CUTQ(g)::R(E),XB(d)
- B(b);N_GUARD::R(A),XS(c)
- Tries
- Try
- S(C);CHECK
- Vars
- R(h);XS(C)::QAB1(D)
- Refutation
- K(e);N_SPINS(c),P-FLIGHT
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- Q(g);CHECK::B(H)+S(G),DCHECK
- R(f);CHECK::S(G)
- Q(g);XB(H)::S(G)
- R(f);N_GUARD,XQ(D)::B(H)+S(G),XQ(g)
- R(h);N_GUARD::QAR2(D),XR(h)
- Refutation
- S(a);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- Q(g);CHECK::B(H)+S(G),DCHECK
- R(f);CHECK::S(G)
- Q(g);XB(H)::S(G)
- R(f);N_GUARD,XQ(D)::B(H)+S(G),XQ(g)
- R(h);N_GUARD::QAR2(D),XR(h)
- Refutation
- S(a);XB(F)
- Try
- B(F);
- Threat
- DUALS(3)
- Vars
- Q(g);CHECK::B(H)+S(G),DCHECK
- R(f);CHECK::S(G)
- Q(g);N_GUARD,XB(F)::R(E),XB(d)
- Q(g);XB(H)::S(G)
- R(f);N_GUARD,XQ(D)::B(H)+S(G),XQ(g)
- Refutation
- R(h);XB(F)
- Try
- B(F);XR(f)
- Threat
- DUALS(4)
- Vars
- Q(g);CHECK::B(H)+S(G),DCHECK
- Q(g);N_GUARD::R(E),XB(d)
- Refutation
- R(h);
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- Q(g);CHECK::B(H)+S(G),DCHECK
- R(f);CHECK::S(G)
- Q(g);XB(H)::S(G)
- Refutation
- R(h);XQ(D)
- Try
- Actual
- B(F);
- Threat
- DUALS(2)
- Vars
- Q(g);CHECK::B(H)+S(G),DCHECK
- R(f);CHECK::S(G)
- Q(g);XB(H)::S(G)
- R(f);N_GUARD,XQ(D)::B(H)+S(G),XQ(g)
- R(h);N_GUARD::QAR2(D),XR(h)
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).