MESON Chess Problem Database
Problem Display
PID: 195105 (3N4/Qpp1p2b/5p2/4kp2/3R3N/1n1Rp2B/4r2p/4n2K w - - 0 1)
Opdenoordt, Joseph J
Brisbane Courier, 1918
#2
7 + 12
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Ra2
- 2.Rxe3#
- 1...Rb2
- 2.Rxe3#
- 1...Rc2
- 2.Rxe3#
- 1...Rd2
- 2.Rxe3#
- 1...Rf2
- 2.Rxe3#
- 1...Rg2
- 2.Rxe3#
- 1...Bg6
- 2.Sxg6#
- 1...Bg8
- 2.Sg6#
- 1...Sc2
- 2.Sf3#
- 1...Sg2
- 2.Sf3#
- 1...Sxd3
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd2
- 2.Qc5#
- 1...Sxd4
- 2.Qxd4#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f4
- 2.Sf7#
- 1...b5
- 2.Qxc7#
- 1...b6
- 2.Qxc7#
- 1...c5
- 2.Qb8#
- 1...c6
- 2.Qb8#
- 1...e6
- 2.Sf7#
- 1...Ra2
- Tries
- 1.Bf1?
- 1...Sxd3
- 2.Sf3#
- 1...Sxd4
- 2.Qxd4#
- 1...Ra2
- 2.Rxe3#
- 1...Rb2
- 2.Rxe3#
- 1...Rc2
- 2.Rxe3#
- 1...Rd2
- 2.Rxe3#
- 1...Rf2
- 2.Rxe3#
- 1...Rg2
- 2.Rxe3#
- 1...Bg6
- 2.Sxg6#
- 1...Bg8
- 2.Sg6#
- 1...Sc2
- 2.Sf3#
- 1...Sg2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd2
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...b5
- 2.Qxc7#
- 1...b6
- 2.Qxc7#
- 1...c5
- 2.Qb8#
- 1...c6
- 2.Qb8#
- 1...e6
- 2.Sf7#
- 1...f4!
- 1...Sxd3
- 1.Bg4?
- 1...Sxd3
- 2.Sf3#
- 1...Sxd4
- 2.Qxd4#
- 1...Ra2
- 2.Rxe3#
- 1...Rb2
- 2.Rxe3#
- 1...Rc2
- 2.Rxe3#
- 1...Rd2
- 2.Rxe3#
- 1...Rf2
- 2.Rxe3#
- 1...Rg2
- 2.Rxe3#
- 1...Bg6
- 2.Sxg6#
- 1...Bg8
- 2.Sg6#
- 1...Sc2
- 2.Sf3#
- 1...Sg2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd2
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f4
- 2.Sf7#
- 1...b5
- 2.Qxc7#
- 1...b6
- 2.Qxc7#
- 1...c5
- 2.Qb8#
- 1...c6
- 2.Qb8#
- 1...e6
- 2.Sf7#
- 1...fxg4!
- 1...Sxd3
- 1.Bxf5?
- threat
- 2.Sf7#
- 2.Re4#
- 1...Sxd3
- 2.Sf7#
- 1...Sxd4
- 2.Qxd4#
- 1...Bg6
- 2.Re4#
- 1...Bg8
- 2.Re4#
- 1...Sd2
- 2.Sf7#
- 2.Qc5#
- 1...Sc5
- 2.Sf7#
- 2.Qxc5#
- 1...Bxf5!
- threat
- 1.Rxb3?
- threat
- 2.Qc5#
- 1...c5
- 2.Qxc5#
- 1...Rc2
- 2.Rxe3#
- 1...Bg8
- 2.Sg6#
- 1...Sd3
- 2.Sf3#
- 1...b6!
- threat
- 1.Ra4?
- 1...Sd4
- 2.Qxd4#
- 1...Ra2
- 2.Qxe3#
- 1...Rb2
- 2.Qxe3#
- 1...Rc2
- 2.Qxe3#
- 1...Rd2
- 2.Qxe3#
- 1...Rf2
- 2.Qxe3#
- 1...Rg2
- 2.Qxe3#
- 1...Bg6
- 2.Sxg6#
- 1...Bg8
- 2.Sg6#
- 1...Sc2
- 2.Sf3#
- 1...Sg2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sa1
- 2.Qd4#
- 2.Qc5#
- 1...Sc1
- 2.Qd4#
- 2.Qc5#
- 1...Sd2
- 2.Qd4#
- 2.Qc5#
- 1...Sa5
- 2.Qd4#
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f4
- 2.Sf7#
- 1...b5
- 2.Qxc7#
- 1...b6
- 2.Qxc7#
- 1...c5
- 2.Qb8#
- 1...c6
- 2.Qb8#
- 1...e6
- 2.Sf7#
- 1...Sxd3!
- 1...Sd4
- 1.Rb4?
- 1...Sd4
- 2.Qxd4#
- 1...Ra2
- 2.Qxe3#
- 1...Rb2
- 2.Qxe3#
- 1...Rc2
- 2.Qxe3#
- 1...Rd2
- 2.Qxe3#
- 1...Rf2
- 2.Qxe3#
- 1...Rg2
- 2.Qxe3#
- 1...Bg6
- 2.Sxg6#
- 1...Bg8
- 2.Sg6#
- 1...Sc2
- 2.Sf3#
- 1...Sg2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sa1
- 2.Qd4#
- 2.Qc5#
- 1...Sc1
- 2.Qd4#
- 2.Qc5#
- 1...Sd2
- 2.Qd4#
- 2.Qc5#
- 2.Qa1#
- 1...Sa5
- 2.Qd4#
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f4
- 2.Sf7#
- 1...b5
- 2.Qxc7#
- 1...b6
- 2.Qxc7#
- 1...c5
- 2.Qb8#
- 1...c6
- 2.Qb8#
- 1...e6
- 2.Sf7#
- 1...Sxd3!
- 1...Sd4
- 1.Rc4?
- 1...Sd4
- 2.Qxd4#
- 1...Ra2
- 2.Qxe3#
- 1...Rb2
- 2.Qxe3#
- 1...Rc2
- 2.Qxe3#
- 1...Rd2
- 2.Qxe3#
- 1...Rf2
- 2.Qxe3#
- 1...Rg2
- 2.Qxe3#
- 1...Bg6
- 2.Sxg6#
- 1...Bg8
- 2.Sg6#
- 1...Sc2
- 2.Sf3#
- 1...Sg2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sa1
- 2.Qd4#
- 2.Qc5#
- 1...Sc1
- 2.Qd4#
- 2.Qc5#
- 1...Sd2
- 2.Qd4#
- 2.Qc5#
- 2.Qa1#
- 1...Sa5
- 2.Qd4#
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f4
- 2.Sf7#
- 1...b5
- 2.Qxc7#
- 1...b6
- 2.Qxc7#
- 1...c5
- 2.Qb8#
- 1...c6
- 2.Qb8#
- 1...e6
- 2.Sf7#
- 1...Sxd3!
- 1...Sd4
- 1.Qb6?
- threat
- 2.Sf7#
- 2.Qxc7#
- 2.Qe6#
- 1...Sxd3
- 2.Sf3#
- 2.Sf7#
- 1...Sxd4
- 2.Qxd4#
- 1...Rc2
- 2.Sf7#
- 2.Rxe3#
- 2.Qe6#
- 1...Bg6
- 2.Sxg6#
- 2.Qxc7#
- 2.Qe6#
- 1...Bg8
- 2.Sg6#
- 2.Qxc7#
- 1...Sc5
- 2.Sf7#
- 2.Qxc5#
- 2.Qxc7#
- 1...c5
- 2.Sf7#
- 2.Qc7#
- 2.Qe6#
- 1...c6
- 2.Qc7#
- 1...e6
- 2.Sf7#
- 2.Qxc7#
- 2.Qxe6#
- 1...cxb6!
- threat
- 1.Qa4?
- threat
- 2.Rd5#
- 1...Sxd3
- 2.Sf3#
- 1...Sxd4
- 2.Qxd4#
- 1...Bg8
- 2.Sg6#
- 1...e6
- 2.Sf7#
- 1...c6!
- threat
- 1.Qa5+?
- 1...Sc5
- 2.Qxc7#
- 2.Qxc5#
- 1...b5
- 2.Qxc7#
- 1...c5
- 2.Qc7#
- 1...Sxa5!
- 1...Sc5
- 1.Qxb7?
- threat
- 2.Qd5#
- 2.Qxc7#
- 1...Sxd3
- 2.Sf3#
- 2.Qd5#
- 1...Rc2
- 2.Qd5#
- 1...Bg8
- 2.Sg6#
- 2.Qxc7#
- 1...c5
- 2.Qd5#
- 2.Qc7#
- 2.Qxe7#
- 2.Qb8#
- 1...c6
- 2.Qc7#
- 2.Qxe7#
- 2.Qb8#
- 1...e6
- 2.Sc6#
- 2.Sf7#
- 2.Qxc7#
- 1...Sxd4!
- threat
- 1.Bf1?
- Keys
- 1.Bg2!
- 1...Rxg2
- 2.Rxe3#
- 1...Sxg2
- 2.Sf3#
- 1...Sxd3
- 2.Sf3#
- 1...Sxd4
- 2.Qxd4#
- 1...Ra2
- 2.Rxe3#
- 1...Rb2
- 2.Rxe3#
- 1...Rc2
- 2.Rxe3#
- 1...Rd2
- 2.Rxe3#
- 1...Rf2
- 2.Rxe3#
- 1...Bg6
- 2.Sxg6#
- 1...Bg8
- 2.Sg6#
- 1...Sc2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sa1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd2
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...f4
- 2.Rd5#
- 1...b5
- 2.Qxc7#
- 1...b6
- 2.Qxc7#
- 1...c5
- 2.Qb8#
- 1...c6
- 2.Qb8#
- 1...e6
- 2.Sf7#
- 1...Rxg2
- 1.Bg2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::R(B),XP(e)
- B(l);N_GUARD::S(E),XB(l)
- B(l);N_GUARD::S(E)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD,XR(B)::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::QAR2(F)
- S(d);OGATE,XR(D)::QAB1(F),XS(d)
- S(d);N_GUARD::QAR2(F),XS(d)
- P(g);::S(G)
- P(i);OGATE::QAB(F),XP(j)
- P(j);OGATEB::QAB(F)
- P(k);SBLOCK::S(G)
- Tries
- Try
- B(C);
- Vars
- S(a);N_GUARD,XR(B)::S(E)
- S(d);OGATE,XR(D)::QAB1(F),XS(d)
- R(b);N_GUARD::R(B),XP(e)
- B(l);N_GUARD::S(E),XB(l)
- B(l);N_GUARD::S(E)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::QAR2(F)
- S(d);N_GUARD::QAR2(F),XS(d)
- P(i);OGATE::QAB(F),XP(j)
- P(j);OGATEB::QAB(F)
- P(k);SBLOCK::S(G)
- Refutation
- P(g);
- Try
- B(C);
- Vars
- S(a);N_GUARD,XR(B)::S(E)
- S(d);OGATE,XR(D)::QAB1(F),XS(d)
- R(b);N_GUARD::R(B),XP(e)
- B(l);N_GUARD::S(E),XB(l)
- B(l);N_GUARD::S(E)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::QAR2(F)
- S(d);N_GUARD::QAR2(F),XS(d)
- P(g);::S(G)
- P(i);OGATE::QAB(F),XP(j)
- P(j);OGATEB::QAB(F)
- P(k);SBLOCK::S(G)
- Refutation
- P(g);XB(C)
- Try
- B(C);XP(g)
- Threat
- DUALS(2)
- Vars
- S(a);XR(B)::S(G)
- S(d);OGATE,XR(D)::QAB1(F),XS(d)
- B(l);::R1(D)
- Refutation
- B(l);XB(C)
- Try
- R(B);XS(d)
- Threat
- QAR2(F)
- Vars
- P(j);::QAR2(F),XP(j)
- R(b);N_GUARD::R(B),XP(e)
- B(l);N_GUARD::S(E)
- S(a);N_GUARD::S(E)
- Refutation
- P(i);
- Try
- R(D);
- Vars
- S(d);N_GUARD::QAB1(F),XS(d)
- R(b);N_GUARD::QAR2(F),XP(e)
- B(l);N_GUARD::S(E),XB(l)
- B(l);N_GUARD::S(E)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::QAR2(F),XS(d)
- P(g);::S(G)
- P(i);OGATE::QAB(F),XP(j)
- P(j);OGATEB::QAB(F)
- P(k);SBLOCK::S(G)
- Refutation
- S(a);XR(B)
- Try
- R(D);
- Vars
- S(d);N_GUARD::QAB1(F),XS(d)
- R(b);N_GUARD::QAR2(F),XP(e)
- B(l);N_GUARD::S(E),XB(l)
- B(l);N_GUARD::S(E)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::QAR2(F),XS(d)
- P(g);::S(G)
- P(i);OGATE::QAB(F),XP(j)
- P(j);OGATEB::QAB(F)
- P(k);SBLOCK::S(G)
- Refutation
- S(a);XR(B)
- Try
- R(D);
- Vars
- S(d);N_GUARD::QAB1(F),XS(d)
- R(b);N_GUARD::QAR2(F),XP(e)
- B(l);N_GUARD::S(E),XB(l)
- B(l);N_GUARD::S(E)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::QAR2(F),XS(d)
- P(g);::S(G)
- P(i);OGATE::QAB(F),XP(j)
- P(j);OGATEB::QAB(F)
- P(k);SBLOCK::S(G)
- Refutation
- S(a);XR(B)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- S(d);OGATE,XR(D)::QAB1(F),XS(d)
- P(j);::QAB(F)
- Refutation
- P(j);XQ(F)
- Try
- Q(F);
- Threat
- R1(D)
- Vars
- S(a);N_GUARD,XR(B)::S(E)
- S(d);OGATE,XR(D)::QAB1(F),XS(d)
- B(l);N_GUARD::S(E)
- P(k);SBLOCK::S(G)
- Refutation
- P(j);
- Try
- Q(F);CHECK
- Vars
- P(i);P_SPINP(i)::QAB(F),XP(j)
- P(j);P_SPINP(j)::QAB(F)
- Refutation
- S(d);XQ(F)
- Try
- Q(F);XP(i)
- Threat
- DUALS(2)
- Vars
- R(b);::QAR1(F)
- Refutation
- S(d);XR(D)
- Try
- Actual
- B(C);
- Vars
- R(b);N_GUARD,XB(C)::R(B),XP(e)
- S(a);N_GUARD,XB(C)::S(E)
- S(a);N_GUARD,XR(B)::S(E)
- S(d);OGATE,XR(D)::QAB1(F),XS(d)
- R(b);N_GUARD::R(B),XP(e)
- B(l);N_GUARD::S(E),XB(l)
- B(l);N_GUARD::S(E)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::QAR2(F)
- S(d);N_GUARD::QAR2(F),XS(d)
- P(g);SBLOCK::R1(D)
- P(i);OGATE::QAB(F),XP(j)
- P(j);OGATEB::QAB(F)
- P(k);SBLOCK::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).