MESON Chess Problem Database
Problem Display
PID: 232885 (4n3/2n5/6R1/2BPk1p1/4p1P1/6KP/3RPP2/5b1Q w - - 0 1)
Morra, Juan Carlos
Il Due Mosse, 1957
#2
10 + 6
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Bxe2
- 2.Qa1#
- 1...Bg2
- 2.Qa1#
- 1...Bxh3
- 2.Qa1#
- 1...Sb5
- 2.Re6#
- 1...Sxd5
- 2.Bd4#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Sd6
- 2.Bxd6#
- 1...Sf6
- 2.Rxg5#
- 1...Sg7
- 2.Bd6#
- 1...e3
- 2.Bd4#
- 1...Bxe2
- Tries
- 1.Ba3?
- threat
- 2.Bb2#
- 1...Sb5
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sf6
- 2.Rxg5#
- 1...Sxd5!
- threat
- 1.Bb4?
- threat
- 2.Bc3#
- 1...Sb5
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sf6
- 2.Rxg5#
- 1...Sxd5!
- threat
- 1.Bb6?
- 1...Bxe2
- 2.Qa1#
- 1...Bxh3
- 2.Qa1#
- 1...Sxd5
- 2.Bd4#
- 1...Se6
- 2.Rxe6#
- 1...Sf6
- 2.Bxc7#
- 1...Bg2
- 2.Qa1#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Sa8
- 2.Re6#
- 1...Sg7
- 2.Bxc7#
- 1...e3
- 2.Bd4#
- 1...Sd6!
- 1...Bxe2
- 1.Be7?
- threat
- 2.Rxg5#
- 1...Sd6
- 2.Bxd6#
- 2.Bf6#
- 1...Se6
- 2.Rxe6#
- 1...Sg7
- 2.Bd6#
- 1...Sxd5!
- threat
- 1.Rd3?
- 1...Bxe2
- 2.Qa1#
- 1...Bxh3
- 2.Qa1#
- 1...Sxd5
- 2.Bd4#
- 1...Sd6
- 2.Bxd6#
- 1...Bg2
- 2.Qa1#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Sf6
- 2.Rxg5#
- 1...Sg7
- 2.Bd6#
- 1...e3
- 2.Bd4#
- 2.Rxe3#
- 1...exd3!
- 1...Bxe2
- 1.Rh6?
- 1...Bxe2
- 2.Qa1#
- 1...Bxh3
- 2.Qa1#
- 1...Sxd5
- 2.Bd4#
- 1...Sd6
- 2.Bxd6#
- 1...Bg2
- 2.Qa1#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Sg7
- 2.Bd6#
- 1...e3
- 2.Bd4#
- 1...Sf6!
- 1...Bxe2
- 1.Qf3?
- threat
- 2.Rxg5#
- 2.Qc3#
- 2.Qf5#
- 1...Sxd5
- 2.Bd4#
- 2.Qf5#
- 1...Sd6
- 2.Bxd6#
- 2.Qc3#
- 2.Qf6#
- 1...Sb5
- 2.Rxg5#
- 2.Re6#
- 2.Qf5#
- 1...Se6
- 2.Rxe6#
- 2.Qf5#
- 1...Sg7
- 2.Bd6#
- 2.Qc3#
- 2.Qf6#
- 1...e3
- 2.Bd4#
- 2.Rxg5#
- 2.Qxe3#
- 2.Qf5#
- 1...exf3!
- threat
- 1.Qxf1?
- threat
- 2.Qa1#
- 1...Sxd5
- 2.Bd4#
- 1...Sb5
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...e3!
- threat
- 1.Qg1?
- 1...Bxe2
- 2.Qa1#
- 1...Bxh3
- 2.Qa1#
- 1...Sxd5
- 2.Bd4#
- 1...Sd6
- 2.Bxd6#
- 1...Bg2
- 2.Qa1#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Sf6
- 2.Rxg5#
- 1...Sg7
- 2.Bd6#
- 1...e3!
- 1...Bxe2
- 1.e3?
- 1...Bxh3
- 2.Qa1#
- 1...Sxd5
- 2.Bd4#
- 1...Sd6
- 2.Bxd6#
- 1...Be2
- 2.Qa1#
- 1...Bg2
- 2.Qa1#
- 1...Bc4
- 2.Qa1#
- 1...Bb5
- 2.Qa1#
- 1...Ba6
- 2.Qa1#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Sf6
- 2.Rxg5#
- 1...Sg7
- 2.Bd6#
- 1...Bd3!
- 1...Bxh3
- 1.h4?
- 1...Bxe2
- 2.Qa1#
- 1...Sxd5
- 2.Bd4#
- 1...Sd6
- 2.Bxd6#
- 1...Bg2
- 2.Qa1#
- 1...Bh3
- 2.Qa1#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Sf6
- 2.Rxg5#
- 1...Sg7
- 2.Bd6#
- 1...e3
- 2.Bd4#
- 1...gxh4+!
- 1...Bxe2
- 1.Ba3?
- Keys
- 1.Qh2!
- 1...Bxe2
- 2.Kg2#
- 1...Bxh3
- 2.Kxh3#
- 1...Sxd5
- 2.Bd4#
- 1...e3
- 2.Kf3#
- 1...Sd6
- 2.Bxd6#
- 1...Bg2
- 2.Kxg2#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Sf6
- 2.Rxg5#
- 1...Sg7
- 2.Bd6#
- 1...Bxe2
- 1.Qh2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(a);OGATE,XP(C)::QAB(A)
- B(a);OGATE::QAB(A)
- B(a);OGATE,XP(F)::QAB(A)
- S(e);N_GUARD::R1(J)
- S(e);SBLOCK,XP(I)::B(H)
- S(e);N_GUARD::R1(J),XS(e)
- S(f);N_GUARD::B(H),XS(f)
- S(f);SBLOCK::R(J),XP(d)
- S(f);N_GUARD::B(H)
- P(b);::B(H)
- Tries
- Try
- B(H);
- Threat
- B(H)
- Vars
- S(e);N_GUARD::R1(J)
- S(e);N_GUARD::R1(J),XS(e)
- S(f);SBLOCK::R(J),XP(d)
- Refutation
- S(e);XP(I)
- Try
- B(H);
- Threat
- B(H)
- Vars
- S(e);N_GUARD::R1(J)
- S(e);N_GUARD::R1(J),XS(e)
- S(f);SBLOCK::R(J),XP(d)
- Refutation
- S(e);XP(I)
- Try
- B(H);
- Vars
- B(a);OGATE,XP(C)::QAB(A)
- B(a);OGATE,XP(F)::QAB(A)
- S(e);SBLOCK,XP(I)::B(H)
- S(e);N_GUARD::R1(J),XS(e)
- S(f);N_GUARD::B(H),XS(e)
- B(a);OGATE::QAB(A)
- S(e);N_GUARD::R1(J)
- P(b);::B(H)
- Refutation
- S(f);
- Try
- B(H);
- Threat
- R(J),XP(d)
- Vars
- S(e);N_GUARD::R1(J),XS(e)
- S(f);N_GUARD::B(H)
- Refutation
- S(e);XP(I)
- Try
- R(B);
- Vars
- B(a);OGATE,XP(C)::QAB(A)
- B(a);OGATE,XP(F)::QAB(A)
- S(e);SBLOCK,XP(I)::B(H)
- S(f);N_GUARD::B(H),XS(f)
- B(a);OGATE::QAB(A)
- S(e);N_GUARD::R1(J)
- S(e);N_GUARD::R1(J),XS(e)
- S(f);SBLOCK::R(J),XP(d)
- S(f);N_GUARD::B(H)
- Refutation
- P(b);XR(B)
- Try
- R(J);
- Vars
- B(a);OGATE,XP(C)::QAB(A)
- B(a);OGATE,XP(F)::QAB(A)
- S(e);SBLOCK,XP(I)::B(H)
- S(f);N_GUARD::B(H),XS(f)
- B(a);OGATE::QAB(A)
- S(e);N_GUARD::R1(J)
- S(e);N_GUARD::R1(J),XS(e)
- S(f);N_GUARD::B(H)
- P(b);::B(H)
- Refutation
- S(f);
- Try
- Q(A);
- Threat
- DUALS(3)
- Refutation
- P(b);XQ(A)
- Try
- Q(A);XB(a)
- Threat
- QAB(A)
- Vars
- S(e);SBLOCK,XP(I)::B(H)
- S(e);N_GUARD::R1(J)
- S(e);N_GUARD::R1(J),XS(e)
- Refutation
- P(b);
- Try
- Q(A);
- Vars
- B(a);OGATE,XP(C)::QAB(A)
- B(a);OGATE,XP(F)::QAB(A)
- S(e);SBLOCK,XP(I)::B(H)
- S(f);N_GUARD::B(H),XS(f)
- B(a);OGATE::QAB(A)
- S(e);N_GUARD::R1(J)
- S(e);N_GUARD::R1(J),XS(e)
- S(f);SBLOCK::R(J),XP(d)
- S(f);N_GUARD::B(H)
- Refutation
- P(b);
- Try
- P(C);
- Vars
- B(a);OGATE,XP(F)::QAB(A)
- S(e);SBLOCK,XP(I)::B(H)
- S(f);N_GUARD::B(H),XS(f)
- B(a);OGATE::QAB(A)
- S(e);N_GUARD::R1(J)
- S(e);N_GUARD::R1(J),XS(e)
- S(f);SBLOCK::R(J),XP(d)
- S(f);N_GUARD::B(H)
- Refutation
- B(a);
- Try
- P(F);
- Vars
- B(a);OGATE,XP(C)::QAB(A)
- S(e);SBLOCK,XP(I)::B(H)
- S(f);N_GUARD::B(H),XS(f)
- B(a);OGATE::QAB(A)
- S(e);N_GUARD::R1(J)
- S(e);N_GUARD::R1(J),XS(e)
- S(f);SBLOCK::R(J),XP(d)
- S(f);N_GUARD::B(H)
- P(b);::B(H)
- Refutation
- P(d);CHECK,XP(F)
- Try
- Actual
- Q(A);
- Vars
- B(a);XP(C)::QAB(A)+K(E)
- B(a);XP(F)::QAB(A)+K(E),XB(a)
- S(e);SBLOCK,XP(I)::B(H)
- P(b);::QAB(A)+K(E)
- S(f);N_GUARD::B(H),XS(f)
- B(a);::QAB(A)+K(E),XB(a)
- S(e);N_GUARD::R1(J)
- S(e);N_GUARD::R1(J),XS(e)
- S(f);SBLOCK::R(J),XP(d)
- S(f);N_GUARD::B(H)
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).