MESON Chess Problem Database
Problem Display
PID: 110777 (3n4/p2rN3/R2n2K1/P1P1p1N1/1B1k1ppQ/2RBp3/2PP4/8 w - - 0 1)
Morra, Juan Carlos
To Mat, 1955
#2
12 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rb7
- 2.Rxd6#
- 1...Rc7
- 2.Rxd6#
- 1...Rxe7
- 2.Rxd6#
- 1...Sc4
- 2.Rxc4#
- 1...Se4
- 2.Rc4#
- 1...Sb5
- 2.Rc4#
- 1...Sf5
- 2.Rc4#
- 1...S6b7
- 2.Rc4#
- 1...S6f7
- 2.Rc4#
- 1...Sc8
- 2.Rc4#
- 1...Se8
- 2.Rc4#
- 1...Sc6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...S8b7
- 2.Se6#
- 1...S8f7
- 2.Se6#
- 1...exd2
- 2.Qf2#
- 1...e2
- 2.Qf2#
- 1...f3
- 2.Sxf3#
- 1...g3
- 2.Sf3#
- 1...e4
- 2.Qh8#
- 1...Rb7
- Tries
- 1.Kh5?
- 1...Rxe7
- 2.Rxd6#
- 1...exd2
- 2.Qf2#
- 1...Rb7
- 2.Rxd6#
- 1...Rc7
- 2.Rxd6#
- 1...Sc4
- 2.Rxc4#
- 1...Se4
- 2.Rc4#
- 1...Sb5
- 2.Rc4#
- 1...Sf5
- 2.Rc4#
- 1...S6b7
- 2.Rc4#
- 1...S6f7
- 2.Rc4#
- 1...Sc8
- 2.Rc4#
- 1...Se8
- 2.Rc4#
- 1...Sc6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...S8b7
- 2.Se6#
- 1...S8f7
- 2.Se6#
- 1...e2
- 2.Qf2#
- 1...f3
- 2.Sxf3#
- 1...g3
- 2.Sf3#
- 1...e4!
- 1...Rxe7
- 1.Bb5?
- threat
- 2.Rd3#
- 1...e4
- 2.Qh8#
- 1...Sxb5!
- threat
- 1.Ba3?
- 1...Rxe7
- 2.Rxd6#
- 1...e4
- 2.Qh8#
- 1...Sc6
- 2.Se6#
- 1...Rb7
- 2.Rxd6#
- 1...Rc7
- 2.Rxd6#
- 1...Sc4
- 2.Rxc4#
- 1...Se4
- 2.Rc4#
- 1...Sb5
- 2.Rc4#
- 1...Sf5
- 2.Rc4#
- 1...S6b7
- 2.Rc4#
- 1...S6f7
- 2.Rc4#
- 1...Sc8
- 2.Rc4#
- 1...Se8
- 2.Rc4#
- 1...Se6
- 2.Sxe6#
- 1...S8b7
- 2.Se6#
- 1...S8f7
- 2.Se6#
- 1...e2
- 2.Qf2#
- 1...f3
- 2.Sxf3#
- 1...g3
- 2.Sf3#
- 1...exd2!
- 1...Rxe7
- 1.Rc6?
- 1...Rxe7
- 2.Rxd6#
- 1...Sxc6
- 2.Se6#
- 1...exd2
- 2.Qf2#
- 1...e4
- 2.Qh8#
- 1...Rb7
- 2.Rxd6#
- 1...Rc7
- 2.Rxd6#
- 1...Sc4
- 2.Rxc4#
- 1...Se4
- 2.Rc4#
- 1...Sb5
- 2.Rc4#
- 1...Sf5
- 2.Rc4#
- 1...S6b7
- 2.Rc4#
- 1...S6f7
- 2.Rc4#
- 1...Sc8
- 2.Rc4#
- 1...Se8
- 2.Rc4#
- 1...Se6
- 2.Sxe6#
- 1...S8b7
- 2.Se6#
- 1...S8f7
- 2.Se6#
- 1...e2
- 2.Qf2#
- 1...f3
- 2.Sxf3#
- 1...g3
- 2.Sf3#
- 1...a6!
- 1...Rxe7
- 1.Qe1?
- 1...Rxe7
- 2.Rxd6#
- 1...exd2
- 2.Qf2#
- 2.Qg1#
- 1...Sc6
- 2.Se6#
- 1...Rb7
- 2.Rxd6#
- 1...Rc7
- 2.Rxd6#
- 1...Sc4
- 2.Rxc4#
- 1...Se4
- 2.Rc4#
- 1...Sb5
- 2.Rc4#
- 1...Sf5
- 2.Rc4#
- 1...S6b7
- 2.Rc4#
- 1...S6f7
- 2.Rc4#
- 1...Sc8
- 2.Rc4#
- 1...Se8
- 2.Rc4#
- 1...Se6
- 2.Sxe6#
- 1...S8b7
- 2.Se6#
- 1...S8f7
- 2.Se6#
- 1...e2
- 2.Qf2#
- 2.Qg1#
- 1...f3
- 2.Qxe3#
- 2.dxe3#
- 1...g3
- 2.Sf3#
- 1...e4!
- 1...Rxe7
- 1.Qh1?
- threat
- 2.Qd5#
- 1...Rxe7
- 2.Rxd6#
- 1...exd2
- 2.Qg1#
- 1...e4
- 2.Qh8#
- 1...Sc4
- 2.Sf5#
- 2.Rxc4#
- 2.Qe4#
- 1...Se4
- 2.Rc4#
- 2.Qxe4#
- 1...Sb5
- 2.Sf5#
- 2.Rc4#
- 2.Qe4#
- 1...Sf5
- 2.Sxf5#
- 2.Rc4#
- 2.Qe4#
- 1...S6b7
- 2.Sf5#
- 2.Rc4#
- 2.Qe4#
- 1...S6f7
- 2.Sf5#
- 2.Rc4#
- 2.Qe4#
- 1...Sc8
- 2.Sf5#
- 2.Rc4#
- 2.Qe4#
- 1...Se8
- 2.Sf5#
- 2.Rc4#
- 2.Qe4#
- 1...f3!
- threat
- 1.Qh2?
- 1...Rxe7
- 2.Rxd6#
- 1...exd2
- 2.Qg1#
- 2.Qf2#
- 1...e4
- 2.Qh8#
- 1...Sc6
- 2.Se6#
- 1...Rb7
- 2.Rxd6#
- 1...Rc7
- 2.Rxd6#
- 1...Sc4
- 2.Rxc4#
- 1...Se4
- 2.Rc4#
- 1...Sb5
- 2.Rc4#
- 1...Sf5
- 2.Rc4#
- 1...S6b7
- 2.Rc4#
- 1...S6f7
- 2.Rc4#
- 1...Sc8
- 2.Rc4#
- 1...Se8
- 2.Rc4#
- 1...Se6
- 2.Sxe6#
- 1...S8b7
- 2.Se6#
- 1...S8f7
- 2.Se6#
- 1...e2
- 2.Qg1#
- 2.Qf2#
- 1...g3
- 2.Sf3#
- 1...f3!
- 1...Rxe7
- 1.Qxg4?
- threat
- 2.Sf3#
- 1...Rxe7
- 2.Rxd6#
- 1...exd2
- 2.Qg1#
- 1...e4!
- threat
- 1.dxe3+?
- 1...fxe3
- 2.Sf3#
- 1...Kxe3!
- 1...fxe3
- 1.c6?
- threat
- 2.Bc5#
- 1...exd2
- 2.Qf2#
- 1...e4
- 2.Qh8#
- 1...Sc4
- 2.Rxc4#
- 1...Se4
- 2.Rc4#
- 1...S6b7
- 2.Rc4#
- 1...Se6
- 2.Sxe6#
- 1...S8b7
- 2.Se6#
- 1...Rxe7!
- threat
- 1.Kh5?
- Keys
- 1.Bc4!
- 1...Rxe7
- 2.Rxd6#
- 1...Sxc4
- 2.Rd3#
- 1...exd2
- 2.Qf2#
- 1...e4
- 2.Qh8#
- 1...Sc6
- 2.Sxc6#
- 1...Rb7
- 2.Rxd6#
- 1...Rc7
- 2.Rxd6#
- 1...Se4
- 2.Sf5#
- 1...Sb5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...S6b7
- 2.Sf5#
- 1...S6f7
- 2.Sf5#
- 1...Sc8
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...Se6
- 2.Sc6#
- 1...S8b7
- 2.Sc6#
- 1...S8f7
- 2.Sc6#
- 1...e2
- 2.Qf2#
- 1...f3
- 2.dxe3#
- 1...g3
- 2.dxe3#
- 1...Rxe7
- 1.Bc4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 14
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(h);N_GUARD::R(J),XS(f)
- R(h);N_GUARD,XS(L)::R(J),XS(f)
- S(f);N_GUARD::R1(C),XS(f)
- S(f);N_GUARD::R1(C)
- S(i);N_GUARD::S(I)
- S(i);N_GUARD::S(I),XS(i)
- P(a);OGATEB,XP(B)::QAB(F)
- P(a);OGATEB::QAB(F)
- P(c);P_SPINP(d)::S(I),XP(c)
- P(d);N_GUARD,P_SPINP(c)::S(I)
- P(e);OGATEB::QAB(F)
- Tries
- Try
- K(K);S_FLIGHT
- Vars
- R(h);N_GUARD,XS(L)::R(J),XS(f)
- P(a);OGATEB,XP(B)::QAB(F)
- R(h);N_GUARD::R(J),XS(f)
- S(f);N_GUARD::R1(C),XS(f)
- S(f);N_GUARD::R1(C)
- S(i);N_GUARD::S(I)
- S(i);N_GUARD::S(I),XS(i)
- P(a);OGATEB::QAB(F)
- P(c);P_SPINP(d)::S(I),XP(c)
- P(d);N_GUARD,P_SPINP(c)::S(I)
- Refutation
- P(e);
- Try
- B(D);
- Threat
- R1(C)
- Vars
- P(e);OGATEB::QAB(F)
- Refutation
- S(f);XB(D)
- Try
- B(E);
- Vars
- R(h);N_GUARD,XS(L)::R(J),XS(f)
- P(e);OGATEB::QAB(F)
- S(i);N_GUARD::S(I)
- R(h);N_GUARD::R(J),XS(f)
- S(f);N_GUARD::R1(C),XS(f)
- S(f);N_GUARD::R1(C)
- S(i);N_GUARD::S(I),XS(i)
- P(a);OGATEB::QAB(F)
- P(c);P_SPINP(d)::S(I),XP(c)
- P(d);N_GUARD,P_SPINP(c)::S(I)
- Refutation
- P(a);XP(B)
- Try
- R(J);
- Vars
- R(h);N_GUARD,XS(L)::R(J),XS(f)
- S(i);N_GUARD,XR(J)::S(I)
- P(a);OGATEB,XP(B)::QAB(F)
- P(e);OGATEB::QAB(F)
- R(h);N_GUARD::R(J),XS(f)
- S(f);N_GUARD::R1(C),XS(f)
- S(f);N_GUARD::R1(C)
- S(i);N_GUARD::S(I),XS(i)
- S(i);N_GUARD::S(I)
- P(a);OGATEB::QAB(F)
- P(c);P_SPINP(d)::S(I),XP(c)
- P(d);N_GUARD,P_SPINP(c)::S(I)
- Refutation
- P(g);
- Try
- Q(F);
- Vars
- R(h);N_GUARD,XS(L)::R(J),XS(f)
- S(i);N_GUARD::S(I)
- R(h);N_GUARD::R(J),XS(f)
- S(f);N_GUARD::R1(C),XS(f)
- S(f);N_GUARD::R1(C)
- S(i);N_GUARD::S(I),XS(i)
- P(d);N_GUARD::S(I)
- Refutation
- P(e);
- Try
- Q(F);
- Threat
- QAR1(F)
- Vars
- R(h);N_GUARD,XS(L)::R(J),XS(f)
- P(a);OGATEB,XP(B)::QAB(F)
- P(e);OGATEB::QAB(F)
- Refutation
- P(c);
- Try
- Q(F);
- Vars
- R(h);N_GUARD,XS(L)::R(J),XS(f)
- P(e);OGATEB::QAB(F)
- S(i);N_GUARD::S(I)
- R(h);N_GUARD::R(J),XS(f)
- S(f);N_GUARD::R1(C),XS(f)
- S(f);N_GUARD::R1(C)
- S(i);N_GUARD::S(I),XS(i)
- P(d);N_GUARD::S(I)
- Refutation
- P(c);
- Try
- Q(F);P_PINP(c),XP(d)
- Threat
- S(I)
- Vars
- R(h);N_GUARD,XS(L)::R(J),XS(f)
- P(a);OGATEB,XP(B)::QAB(F)
- Refutation
- P(e);N_SPINP(c)
- Try
- P(B);CHECK,XP(a)
- Vars
- P(c);P_SPINP(d),SBLOCK,XP(B)::S(I)
- Refutation
- K(b);S_FLIGHT,XP(B)
- Try
- P(H);
- Threat
- B(E)
- Vars
- P(a);OGATEB,XP(B)::QAB(F)
- P(e);OGATEB::QAB(F)
- S(f);N_GUARD::R1(C),XS(f)
- S(f);N_GUARD::R1(C)
- S(i);N_GUARD::S(I),XS(i)
- S(i);N_GUARD::S(I)
- Refutation
- R(h);XS(L)
- Try
- Actual
- B(D);
- Vars
- R(h);N_GUARD,XS(L)::R(J),XS(f)
- S(f);SBLOCK,XB(D)::R1(C)
- P(a);OGATEB,XP(B)::QAB(F)
- P(e);OGATEB::QAB(F)
- S(i);N_GUARD::S(L),XS(i)
- R(h);N_GUARD::R(J),XS(f)
- S(f);N_GUARD::S(L)
- S(f);N_GUARD::S(L),XS(f)
- S(i);N_GUARD::S(L)
- P(a);OGATEB::QAB(F)
- P(c);N_GUARD,P_SPINP(d)::P(B),XP(a)
- P(d);P_SPINP(c)::P(B),XP(a)
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).