MESON Chess Problem Database
Problem Display
PID: 218274 (8/4p3/4n3/3Q1R2/R3Nnp1/2r2k2/1p1p1pN1/1Kb2B2 w - - 0 1)
Hartong, Jan
British Chess Magazine, 1921
#2
7 + 10
SOLUTION
- SOUND
- Sets
- 1...Rc2
- 2.Qd3#
- 1...Ra3
- 2.Rxa3#
- 1...Rb3
- 2.Qxb3#
- 1...Rd3
- 2.Qxd3#
- 1...Re3
- 2.Sh4#
- 1...Rc4
- 2.Qd3#
- 1...Rc5
- 2.Qd3#
- 1...Rc6
- 2.Qd3#
- 1...Rc7
- 2.Qd3#
- 1...Rc8
- 2.Qd3#
- 1...Sd4
- 2.Rxf4#
- 1...Sc5
- 2.Rxf4#
- 1...Sg5
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Sg7
- 2.Rxf4#
- 1...Sd8
- 2.Rxf4#
- 1...Sf8
- 2.Rxf4#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...g3
- 2.Sf6#
- 1...Rc2
- Tries
- 1.Rb4?
- 1...g3
- 2.Sf6#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Rc2
- 2.Qd3#
- 1...Rb3
- 2.Rxb3#
- 2.Qxb3#
- 1...Rd3
- 2.Qxd3#
- 1...Re3
- 2.Sh4#
- 1...Rc4
- 2.Qd3#
- 1...Rc5
- 2.Qd3#
- 1...Rc6
- 2.Qd3#
- 1...Rc7
- 2.Qd3#
- 1...Rc8
- 2.Qd3#
- 1...Sd4
- 2.Rxf4#
- 1...Sc5
- 2.Rxf4#
- 1...Sg5
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Sg7
- 2.Rxf4#
- 1...Sd8
- 2.Rxf4#
- 1...Sf8
- 2.Rxf4#
- 1...Ra3!
- 1...g3
- 1.Rf6?
- 1...g3
- 2.Qh5#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Rc2
- 2.Qd3#
- 1...Ra3
- 2.Rxa3#
- 1...Rb3
- 2.Qxb3#
- 1...Rd3
- 2.Qxd3#
- 1...Re3
- 2.Sh4#
- 1...Rc4
- 2.Qd3#
- 1...Rc5
- 2.Qd3#
- 1...Rc6
- 2.Qd3#
- 1...Rc7
- 2.Qd3#
- 1...Rc8
- 2.Qd3#
- 1...Sd4
- 2.Rxf4#
- 1...Sc5
- 2.Rxf4#
- 1...Sg5
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Sg7
- 2.Rxf4#
- 1...Sd8
- 2.Rxf4#
- 1...Sf8
- 2.Rxf4#
- 1...exf6!
- 1...g3
- 1.Rf8?
- 1...g3
- 2.Qh5#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Rc2
- 2.Qd3#
- 1...Ra3
- 2.Rxa3#
- 1...Rb3
- 2.Qxb3#
- 1...Rd3
- 2.Qxd3#
- 1...Re3
- 2.Sh4#
- 1...Rc4
- 2.Qd3#
- 1...Rc5
- 2.Qd3#
- 1...Rc6
- 2.Qd3#
- 1...Rc7
- 2.Qd3#
- 1...Rc8
- 2.Qd3#
- 1...Sd4
- 2.Rxf4#
- 1...Sc5
- 2.Rxf4#
- 1...Sg5
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Sg7
- 2.Rxf4#
- 1...Sd8
- 2.Rxf4#
- 1...Sxf8!
- 1...g3
- 1.Qb3?
- threat
- 2.Qd1#
- 2.Qxc3#
- 1...Sd4
- 2.Rxf4#
- 1...g3
- 2.Qd1#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Rd3
- 2.Qd1#
- 2.Qxd3#
- 1...Re3
- 2.Sh4#
- 2.Qxe3#
- 1...Sc5
- 2.Rxf4#
- 2.Qd1#
- 1...Rxb3!
- threat
- 1.Qxd2?
- threat
- 2.Sh4#
- 2.Qd1#
- 2.Qe2#
- 2.Qxf2#
- 1...Rc4
- 2.Qe2#
- 1...Sd4
- 2.Rxf4#
- 1...g3
- 2.Qd1#
- 2.Qe2#
- 1...Rc2
- 2.Sh4#
- 1...Rd3
- 2.Sh4#
- 2.Qe2#
- 2.Qxf2#
- 1...Re3
- 2.Sh4#
- 2.Qxf2#
- 1...Bxd2!
- threat
- 1.Qd4?
- threat
- 2.Sh4#
- 2.Qxf2#
- 2.Qxc3#
- 1...Sxd4
- 2.Rxf4#
- 1...d1Q
- 2.Sh4#
- 2.Qxf2#
- 2.Qxd1#
- 1...d1S
- 2.Sh4#
- 2.Qxd1#
- 1...d1B
- 2.Sh4#
- 2.Qxf2#
- 2.Qxd1#
- 1...d1R
- 2.Sh4#
- 2.Qxf2#
- 2.Qxd1#
- 1...Rc2
- 2.Sh4#
- 2.Qxf2#
- 2.Qe3#
- 2.Qd3#
- 1...Ra3
- 2.Sh4#
- 2.Rxa3#
- 2.Qxf2#
- 1...Rb3
- 2.Sh4#
- 2.Qxf2#
- 1...Rd3
- 2.Sh4#
- 2.Qxf2#
- 2.Qxd3#
- 1...Re3
- 2.Sh4#
- 2.Qxe3#
- 1...Rc4
- 2.Sh4#
- 2.Qe3#
- 2.Qd3#
- 1...Rc5
- 2.Sh4#
- 2.Qxf2#
- 2.Qe3#
- 2.Qd3#
- 1...Rc6
- 2.Sh4#
- 2.Qxf2#
- 2.Qe3#
- 2.Qd3#
- 1...Rc7
- 2.Sh4#
- 2.Qxf2#
- 2.Qe3#
- 2.Qd3#
- 1...Rc8
- 2.Sh4#
- 2.Qxf2#
- 2.Qe3#
- 2.Qd3#
- 1...Sc5
- 2.Sh4#
- 2.Rxf4#
- 2.Qxf2#
- 1...g3!
- threat
- 1.Rb4?
- Keys
- 1.Rf7!
- 1...g3
- 2.Qh5#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Rc2
- 2.Qd3#
- 1...Ra3
- 2.Rxa3#
- 1...Rb3
- 2.Qxb3#
- 1...Rd3
- 2.Qxd3#
- 1...Re3
- 2.Sh4#
- 1...Rc4
- 2.Qd3#
- 1...Rc5
- 2.Qd3#
- 1...Rc6
- 2.Qd3#
- 1...Rc7
- 2.Qd3#
- 1...Rc8
- 2.Qd3#
- 1...Sd4
- 2.Rxf4#
- 1...Sc5
- 2.Rxf4#
- 1...Sg5
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Sg7
- 2.Rxf4#
- 1...Sd8
- 2.Rxf4#
- 1...Sf8
- 2.Rxf4#
- 1...g3
- 1.Rf7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(e);N_GUARD::QAR2(F)
- R(e);OGATEB::R(D),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- R(e);N_GUARD::QAR2(F),XR(e)
- R(e);SBLOCK::S(C)
- S(i);N_GUARD::R1(G),XS(g)
- P(c);OGATE::QAB(F),XQ(c)
- P(c);OGATE::QAB(F),XS(c)
- P(c);OGATE::QAB(F),XB(c)
- P(c);OGATE::QAB(F),XR(c)
- P(h);SBLOCK::QAB(F)+S(E)
- Tries
- Try
- R(D);
- Vars
- P(h);SBLOCK::QAB(F)+S(E)
- P(c);OGATE::QAB(F),XQ(c)
- P(c);OGATE::QAB(F),XS(c)
- P(c);OGATE::QAB(F),XB(c)
- P(c);OGATE::QAB(F),XR(c)
- R(e);N_GUARD::QAR2(F)
- R(e);N_GUARD::QAR2(F),XR(e)
- R(e);SBLOCK::S(C)
- S(i);N_GUARD::R1(G),XS(g)
- Refutation
- R(e);
- Try
- R(G);
- Vars
- P(h);OGATEB::QAB(F)
- P(c);OGATE::QAB(F),XQ(c)
- P(c);OGATE::QAB(F),XS(c)
- P(c);OGATE::QAB(F),XB(c)
- P(c);OGATE::QAB(F),XR(c)
- R(e);N_GUARD::QAR2(F)
- R(e);OGATEB::R(D),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- R(e);N_GUARD::QAR2(F),XR(e)
- R(e);SBLOCK::S(C)
- S(i);N_GUARD::R1(G),XS(g)
- Refutation
- P(j);N_SPINS(g),XR(G)
- Try
- R(G);
- Vars
- P(h);OGATEB::QAB(F)
- P(c);OGATE::QAB(F),XQ(c)
- P(c);OGATE::QAB(F),XS(c)
- P(c);OGATE::QAB(F),XB(c)
- P(c);OGATE::QAB(F),XR(c)
- R(e);N_GUARD::QAR2(F)
- R(e);OGATEB::R(D),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- R(e);N_GUARD::QAR2(F),XR(e)
- R(e);SBLOCK::S(C)
- S(i);N_GUARD::R1(G),XS(g)
- Refutation
- S(i);N_SPINS(g),XR(G)
- Try
- Q(F);P_PINR(e)
- Threat
- DUALS(2)
- Vars
- S(i);N_GUARD::R1(G),XS(g)
- P(h);::QAB(F)
- P(c);::QAB(F),XQ(c)
- P(c);::QAB(F),XS(c)
- P(c);::QAB(F),XB(c)
- P(c);::QAB(F),XR(c)
- Refutation
- R(e);N_SPINR(e),XQ(F)
- Try
- Q(F);XP(c)
- Threat
- DUALS(4)
- Vars
- R(e);::QAB1(F)
- S(i);N_GUARD::R1(G),XS(g)
- R(e);::S(C)
- Refutation
- B(a);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- S(i);N_GUARD,XQ(F)::R1(G),XS(g)
- Refutation
- P(h);
- Try
- Actual
- R(G);
- Vars
- P(h);OGATEB::QAB(F)
- P(c);OGATE::QAB(F),XQ(c)
- P(c);OGATE::QAB(F),XS(c)
- P(c);OGATE::QAB(F),XB(c)
- P(c);OGATE::QAB(F),XR(c)
- R(e);N_GUARD::QAR2(F)
- R(e);OGATEB::R(D),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- R(e);N_GUARD::QAR2(F),XR(e)
- R(e);SBLOCK::S(C)
- S(i);N_GUARD::R1(G),XS(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).