MESON Chess Problem Database
Problem Display
PID: 149142 (8/8/8/1bN5/3r4/4k1B1/nr1NB3/Knb2Q2 w - - 0 1)
Dehler, Otto Georg Edgar
Deutsche Schachblatter, 1929
#2
6 + 7
| 15148 | Sadier Collection | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Rbxd2
- 2.Qf2#
- 2.Qf3#
- 1...Rdxd2
- 2.Qf2#
- 1...Bxd2
- 2.Qf2#
- 2.Qf3#
- 1...Sxd2
- 2.Qf2#
- 1...Rbxd2
- Tries
- 1.Sde4?
- threat
- 2.Bf4#
- 2.Qf2#
- 2.Qf3#
- 1...Rxe2
- 2.Bf4#
- 2.Qf4#
- 1...Bxe2
- 2.Bf4#
- 2.Qf2#
- 2.Qf4#
- 1...Rd1
- 2.Qf2#
- 1...Rdd2
- 2.Qf2#
- 1...Rd3
- 2.Qf2#
- 1...Ra4
- 2.Qf2#
- 1...Rdb4
- 2.Qf2#
- 1...Rc4
- 2.Qf2#
- 1...Rd5
- 2.Qf2#
- 1...Rd6
- 2.Qf2#
- 1...Rd7
- 2.Qf2#
- 1...Rd8
- 2.Qf2#
- 1...Sd2
- 2.Bf4#
- 2.Qf2#
- 1...Rxe4!
- threat
- 1.Bd3?
- threat
- 2.Qe2#
- 2.Qe1#
- 2.Qf2#
- 1...Kxd2
- 2.Qe1#
- 1...Rxd3
- 2.Qf2#
- 1...Bxd2
- 2.Qe2#
- 2.Qf2#
- 1...Bxd3
- 2.Qf2#
- 1...Sxd2
- 2.Qe2#
- 2.Qf2#
- 1...Ra4
- 2.Qf2#
- 1...Rdb4
- 2.Qf2#
- 1...Rc4
- 2.Qf2#
- 1...Re4
- 2.Qf2#
- 1...Rf4
- 2.Qxf4#
- 1...Rg4
- 2.Qf2#
- 1...Rh4
- 2.Qf2#
- 1...Rd5
- 2.Qf2#
- 2.Qf4#
- 1...Rd6
- 2.Qf2#
- 2.Qf4#
- 1...Rd7
- 2.Qf2#
- 2.Qf4#
- 1...Rd8
- 2.Qf2#
- 2.Qf4#
- 1...Sbc3
- 2.Qf2#
- 1...Sac3
- 2.Qf2#
- 1...Rxd2!
- threat
- 1.Bg4?
- threat
- 2.Qf2#
- 1...Rbxd2
- 2.Qf3#
- 1...Rdxd2
- 2.Qf4#
- 1...Bxf1
- 2.Sxf1#
- 1...Rf4
- 2.Qxf4#
- 1...Be2
- 2.Qxe2#
- 1...Kxd2!
- threat
- 1.Bh5?
- threat
- 2.Qf2#
- 1...Rbxd2
- 2.Qf3#
- 1...Rdxd2
- 2.Qf4#
- 1...Bxf1
- 2.Sxf1#
- 1...Rf4
- 2.Qxf4#
- 1...Be2
- 2.Qxe2#
- 1...Kxd2!
- threat
- 1.Be1?
- threat
- 2.Qf2#
- 2.Qf3#
- 1...Rdxd2
- 2.Qf2#
- 1...Bxe2
- 2.Qf2#
- 1...Sxd2
- 2.Qf2#
- 1...Rd3
- 2.Qf2#
- 1...Ra4
- 2.Qf2#
- 1...Rdb4
- 2.Qf2#
- 1...Rc4
- 2.Qf2#
- 1...Re4
- 2.Qf2#
- 1...Rg4
- 2.Qf2#
- 1...Rh4
- 2.Qf2#
- 1...Rd5
- 2.Qf2#
- 1...Rd6
- 2.Qf2#
- 1...Rd7
- 2.Qf2#
- 1...Rd8
- 2.Qf2#
- 1...Bc6
- 2.Qf2#
- 1...Rf4!
- threat
- 1.Qg1+?
- 1...Kxe2
- 2.Qe1#
- 1...Kxd2!
- 1...Kxe2
- 1.Sde4?
- Keys
- 1.Bd1!
- threat
- 2.Qf2#
- 1...Kxd2
- 2.Qe1#
- 1...Rbxd2
- 2.Qf3#
- 1...Rdxd2
- 2.Qf4#
- 1...Bxf1
- 2.Sxf1#
- 1...Rf4
- 2.Qxf4#
- 1...Be2
- 2.Qxe2#
- threat
- 1.Bd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 1
- Sets
- R(f);SBLOCK,XS(C)::QAB1(B)
- S(a);SBLOCK,XS(C)::QAB1(B)
- Tries
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- R(f);::QAB1(B)
- Refutation
- R(f);XS(C)
- Try
- B(D);
- Threat
- DUALS(3)
- Vars
- K(e);S_FLIGHT,XS(C)::QAB1(B)
- R(f);XB(D)::QAB1(B)
- B(g);XB(D)::QAB1(B)
- R(f);::QAB1(B)
- R(f);N_GUARD::QAB1(B),XR(f)
- S(a);::QAB1(B)
- S(c);::QAB1(B)
- Refutation
- R(d);XS(C)
- Try
- B(D);
- Threat
- QAB1(B)
- Vars
- R(d);SBLOCK,XS(C)::QAR1(B)
- R(f);N_GUARD,SBLOCK,XS(C)::QAB1(B)
- B(g);XQ(B)::S(C),XB(g)
- R(f);N_GUARD::QAB1(B),XR(f)
- B(g);N_GUARD::QAR1(B),XB(g)
- Refutation
- K(e);S_FLIGHT,XS(C)
- Try
- B(D);
- Threat
- QAB1(B)
- Vars
- R(d);SBLOCK,XS(C)::QAR1(B)
- R(f);N_GUARD,SBLOCK,XS(C)::QAB1(B)
- B(g);XQ(B)::S(C),XB(g)
- R(f);N_GUARD::QAB1(B),XR(f)
- B(g);N_GUARD::QAR1(B),XB(g)
- Refutation
- K(e);S_FLIGHT,XS(C)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- R(f);XS(C)::QAB1(B)
- B(g);XB(D)::QAB1(B)
- S(a);XS(C)::QAB1(B)
- R(f);::QAB1(B)
- B(g);::QAB1(B)
- Refutation
- R(f);
- Try
- Q(B);CHECK
- Vars
- K(e);OGATEB,P-FLIGHT,XB(D)::QAR1(B)
- Refutation
- K(e);S_FLIGHT,XS(C)
- Try
- Actual
- B(D);
- Threat
- QAB1(B)
- Vars
- K(e);S_FLIGHT,XS(C)::QAB1(B)
- R(d);SBLOCK,XS(C)::QAR1(B)
- R(f);N_GUARD,SBLOCK,XS(C)::QAB1(B)
- B(g);XQ(B)::S(C),XB(g)
- R(f);N_GUARD::QAB1(B),XR(f)
- B(g);N_GUARD::QAR1(B),XB(g)
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).