MESON Chess Problem Database
Problem Display
PID: 99949 (8/6p1/p4pN1/KnRb2p1/8/5k2/2Q3R1/1BB2rn1 w - - 0 1)
Opdenoordt, Joseph J
Magyar Sakkvilag, 1928
#2
7 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxc1
- 2.Qf2#
- 1...Rd1
- 2.Qf2#
- 1...Re1
- 2.Qf2#
- 1...Rf2
- 2.Qxf2#
- 1...Ba2
- 2.Rf5#
- 2.Qe4#
- 1...Bb3
- 2.Rf5#
- 2.Qe4#
- 1...Bc4
- 2.Rf5#
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bc6
- 2.Rf5#
- 1...Be6
- 2.Qe4#
- 1...Bb7
- 2.Rf5#
- 1...Bf7
- 2.Rf5#
- 2.Qe4#
- 1...Ba8
- 2.Rf5#
- 1...Bg8
- 2.Rf5#
- 2.Qe4#
- 1...Se2
- 2.Qxe2#
- 1...Sh3
- 2.Qe2#
- 1...Sa3
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sd4
- 2.Rc3#
- 1...Sd6
- 2.Rc3#
- 1...Sa7
- 2.Rc3#
- 1...Sc7
- 2.Rc3#
- 1...g4
- 2.Sh4#
- 1...f5
- 2.Se5#
- 1...Rxc1
- Tries
- 1.Kb4?
- 1...Rxc1
- 2.Qf2#
- 1...Rf2
- 2.Qxf2#
- 1...Se2
- 2.Qxe2#
- 1...Rd1
- 2.Qf2#
- 1...Re1
- 2.Qf2#
- 1...Ba2
- 2.Rf5#
- 2.Qe4#
- 1...Bb3
- 2.Rf5#
- 2.Qe4#
- 1...Bc4
- 2.Rf5#
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bc6
- 2.Rf5#
- 1...Be6
- 2.Qe4#
- 1...Bb7
- 2.Rf5#
- 1...Bf7
- 2.Rf5#
- 2.Qe4#
- 1...Ba8
- 2.Rf5#
- 1...Bg8
- 2.Rf5#
- 2.Qe4#
- 1...Sh3
- 2.Qe2#
- 1...Sa3
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sd4
- 2.Rc3#
- 1...Sd6
- 2.Rc3#
- 1...Sa7
- 2.Rc3#
- 1...Sc7
- 2.Rc3#
- 1...g4
- 2.Sh4#
- 1...f5
- 2.Se5#
- 1...a5+!
- 1...Rxc1
- 1.Kb6?
- 1...Rxc1
- 2.Qf2#
- 1...Rf2
- 2.Qxf2#
- 1...Se2
- 2.Qxe2#
- 1...Rd1
- 2.Qf2#
- 1...Re1
- 2.Qf2#
- 1...Ba2
- 2.Rf5#
- 2.Qe4#
- 1...Bb3
- 2.Rf5#
- 2.Qe4#
- 1...Bc4
- 2.Rf5#
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bc6
- 2.Rf5#
- 1...Be6
- 2.Qe4#
- 1...Bb7
- 2.Rf5#
- 1...Bf7
- 2.Rf5#
- 2.Qe4#
- 1...Ba8
- 2.Rf5#
- 1...Bg8
- 2.Rf5#
- 2.Qe4#
- 1...Sh3
- 2.Qe2#
- 1...Sa3
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sd4
- 2.Rc3#
- 1...Sd6
- 2.Rc3#
- 1...Sa7
- 2.Rc3#
- 1...Sc7
- 2.Rc3#
- 1...g4
- 2.Sh4#
- 1...f5
- 2.Se5#
- 1...a5!
- 1...Rxc1
- 1.Sf4?
- threat
- 2.Qd3#
- 1...Rxc1
- 2.Qf2#
- 1...Rd1
- 2.Qf2#
- 1...Re1
- 2.Qf2#
- 1...Bc4
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...gxf4!
- threat
- 1.Bf4?
- threat
- 2.Rg3#
- 1...Se2
- 2.Qxe2#
- 1...gxf4!
- threat
- 1.Rxb5?
- 1...Rxc1
- 2.Qf2#
- 1...Rf2
- 2.Qxf2#
- 1...Se2
- 2.Qxe2#
- 1...g4
- 2.Sh4#
- 1...Rd1
- 2.Qf2#
- 1...Re1
- 2.Qf2#
- 1...Ba2
- 2.Rf5#
- 2.Qe4#
- 1...Bb3
- 2.Rxb3#
- 2.Rf5#
- 2.Qe4#
- 1...Bc4
- 2.Rf5#
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bc6
- 2.Rb3#
- 2.Rf5#
- 2.Qxc6#
- 1...Be6
- 2.Qe4#
- 1...Bb7
- 2.Rb3#
- 2.Rf5#
- 1...Bf7
- 2.Rf5#
- 2.Qe4#
- 1...Ba8
- 2.Rb3#
- 2.Rf5#
- 1...Bg8
- 2.Rf5#
- 2.Qe4#
- 1...Sh3
- 2.Qe2#
- 1...f5
- 2.Se5#
- 1...axb5!
- 1...Rxc1
- 1.Rxd5?
- threat
- 2.Rf5#
- 2.Qe4#
- 1...Rxc1
- 2.Qe4#
- 2.Qf2#
- 1...Rf2
- 2.Qe4#
- 2.Qxf2#
- 1...Se2
- 2.Qe4#
- 2.Qxe2#
- 1...Re1
- 2.Rf5#
- 2.Qf2#
- 1...Sh3
- 2.Qe4#
- 2.Qe2#
- 1...Sc3
- 2.Rf5#
- 1...Sd4
- 2.Qe4#
- 1...f5
- 2.Se5#
- 2.Rxf5#
- 1...Sd6!
- threat
- 1.Kb4?
- Keys
- 1.Rc6!
- 1...Rxc1
- 2.Qf2#
- 1...Bxc6
- 2.Qxc6#
- 1...Rf2
- 2.Qxf2#
- 1...Se2
- 2.Qxe2#
- 1...g4
- 2.Sh4#
- 1...Rd1
- 2.Qf2#
- 1...Re1
- 2.Qf2#
- 1...Ba2
- 2.Qe4#
- 1...Bb3
- 2.Qe4#
- 1...Bc4
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Be6
- 2.Qe4#
- 1...Bf7
- 2.Qe4#
- 1...Bg8
- 2.Qe4#
- 1...Sh3
- 2.Qe2#
- 1...Sa3
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sd4
- 2.Rc3#
- 1...Sd6
- 2.Rc3#
- 1...Sa7
- 2.Rc3#
- 1...Sc7
- 2.Rc3#
- 1...f5
- 2.Se5#
- 1...Rxc1
- 1.Rc6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 2
- Sets
- R(a);N_GUARD,XB(B)::QAR1(C)
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD::QAR1(C),XR(a)
- B(e);N_GUARD::QAB1(C),XB(e)
- B(e);OGATE::R(F)
- B(e);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C),XS(b)
- S(b);N_GUARD::QAB1(C)
- S(d);N_GUARD::R(F)
- S(d);N_GUARD::R(F),XS(d)
- P(f);N_GUARD::S(G)
- P(h);N_GUARD::S(G)
- Tries
- Try
- K(E);S_FLIGHT
- Vars
- R(a);N_GUARD,XB(B)::QAR1(C)
- R(a);N_GUARD::QAR1(C),XR(a)
- S(b);N_GUARD::QAB1(C),XS(b)
- R(a);N_GUARD::QAR1(C)
- B(e);N_GUARD::QAB1(C),XB(e)
- B(e);OGATE::R(F)
- B(e);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C)
- S(d);N_GUARD::R(F)
- S(d);N_GUARD::R(F),XS(d)
- P(f);N_GUARD::S(G)
- P(h);N_GUARD::S(G)
- Refutation
- P(g);CHECK
- Try
- K(E);S_FLIGHT
- Vars
- R(a);N_GUARD,XB(B)::QAR1(C)
- R(a);N_GUARD::QAR1(C),XR(a)
- S(b);N_GUARD::QAB1(C),XS(b)
- R(a);N_GUARD::QAR1(C)
- B(e);N_GUARD::QAB1(C),XB(e)
- B(e);OGATE::R(F)
- B(e);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C)
- S(d);N_GUARD::R(F)
- S(d);N_GUARD::R(F),XS(d)
- P(f);N_GUARD::S(G)
- P(h);N_GUARD::S(G)
- Refutation
- P(g);
- Try
- S(G);
- Threat
- QAR2(C)
- Vars
- R(a);N_GUARD,XB(B)::QAR1(C)
- R(a);N_GUARD::QAR1(C)
- B(e);N_GUARD::QAB1(C)
- B(e);N_GUARD::QAB1(C),XB(e)
- Refutation
- P(f);XS(G)
- Try
- B(B);
- Threat
- R1(D)
- Vars
- S(b);N_GUARD::QAB1(C),XS(b)
- Refutation
- P(f);XB(B)
- Try
- R(F);XS(d)
- Vars
- R(a);N_GUARD,XB(B)::QAR1(C)
- R(a);N_GUARD::QAR1(C),XR(a)
- S(b);N_GUARD::QAB1(C),XS(b)
- P(f);N_GUARD::S(G)
- R(a);N_GUARD::QAR1(C)
- B(e);N_GUARD::QAB1(C),XB(e)
- B(e);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C)
- P(h);N_GUARD::S(G)
- Refutation
- P(g);XR(F)
- Try
- R(F);XB(e)
- Threat
- DUALS(2)
- Vars
- S(d);::R(F)
- S(d);::QAB1(C)
- Refutation
- S(d);
- Try
- Actual
- R(F);
- Vars
- R(a);N_GUARD,XB(B)::QAR1(C)
- B(e);OGATE,XR(F)::QAB(C),XB(e)
- R(a);N_GUARD::QAR1(C),XR(a)
- S(b);N_GUARD::QAB1(C),XS(b)
- P(f);N_GUARD::S(G)
- R(a);N_GUARD::QAR1(C)
- B(e);N_GUARD::QAB1(C)
- B(e);N_GUARD::QAB1(C),XB(e)
- S(b);N_GUARD::QAB1(C)
- S(d);N_GUARD::R(F)
- S(d);N_GUARD::R(F),XS(d)
- P(h);N_GUARD::S(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).