MESON Chess Problem Database
Problem Display
PID: 232871 (qrr1N3/5RBp/b3B1nK/R7/4kNpp/b4p2/2PPp3/1Q6 w - - 0 1)
Morra, Juan Carlos
Il Due Mosse, 1955
#2
10 + 12
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.Bxd5#
- 1...Qa7
- 2.Bd5#
- 1...Rb4
- 2.Sd6#
- 1...Rb7
- 2.Bd5#
- 1...Rc5
- 2.Sd6#
- 1...Rc6
- 2.Bd5#
- 1...Bc1
- 2.Sd6#
- 1...Bb2
- 2.Sd6#
- 2.c4#
- 1...Bb4
- 2.c4#
- 1...Bd6
- 2.Sxd6#
- 1...Bd3
- 2.cxd3#
- 1...Bb5
- 2.c4#
- 1...Bb7
- 2.c3#
- 2.c4#
- 1...Sxf4
- 2.Bf5#
- 1...f2
- 2.Qh1#
- 1...Qd5
- Tries
- 1.Sd3?
- threat
- 2.Sf2#
- 2.Bf5#
- 1...Bxd3
- 2.cxd3#
- 1...Se5
- 2.Rf4#
- 1...e1Q
- 2.Bf5#
- 2.Qxe1#
- 1...e1B
- 2.Bf5#
- 2.Qxe1#
- 1...Qd5
- 2.Sf2#
- 2.Bxd5#
- 1...Qa7
- 2.Bd5#
- 2.Bf5#
- 1...Rb5
- 2.Sf2#
- 1...Rc5
- 2.Sf2#
- 2.Sd6#
- 1...Bb5
- 2.Sf2#
- 1...Se7
- 2.Sf2#
- 2.Rf4#
- 1...f2
- 2.Sxf2#
- 2.Qh1#
- 1...g3
- 2.Bf5#
- 1...Bc5!
- threat
- 1.Sh3?
- threat
- 2.Sf2#
- 2.Sg5#
- 2.Bf5#
- 1...Rxc2
- 2.Sf2#
- 2.Bf5#
- 1...Se5
- 2.Rf4#
- 1...e1Q
- 2.Sg5#
- 2.Bf5#
- 1...e1B
- 2.Sg5#
- 2.Bf5#
- 1...Bc5
- 2.Sg5#
- 1...Qd5
- 2.Sf2#
- 2.Bxd5#
- 1...Qa7
- 2.Sg5#
- 2.Bd5#
- 2.Bf5#
- 1...Rb5
- 2.Sf2#
- 1...Rc5
- 2.Sf2#
- 2.Sd6#
- 1...Be7
- 2.Sf2#
- 2.Bf5#
- 1...Bb5
- 2.Sf2#
- 2.Sg5#
- 2.c4#
- 1...Se7
- 2.Sf2#
- 2.Sg5#
- 2.Rf4#
- 1...f2
- 2.Sxf2#
- 2.Sg5#
- 2.Qh1#
- 1...g3
- 2.Sg5#
- 2.Bf5#
- 1...gxh3!
- threat
- 1.Sxg6?
- threat
- 2.Bf5#
- 2.Rf4#
- 1...Rxc2
- 2.Bf5#
- 1...Bc5
- 2.Rf4#
- 1...Qd5
- 2.Bxd5#
- 2.Rf4#
- 1...Rb5
- 2.Rf4#
- 1...Rc5
- 2.Sd6#
- 2.Rf4#
- 1...Bd6
- 2.Sxd6#
- 2.Bf5#
- 1...Bb5
- 2.Rf4#
- 2.c4#
- 1...f2
- 2.Rf4#
- 2.Qh1#
- 1...hxg6!
- threat
- 1.Rxa3?
- threat
- 2.Sd6#
- 2.Re3#
- 1...Rxe8
- 2.Re3#
- 1...e1Q
- 2.Sd6#
- 1...e1R
- 2.Sd6#
- 1...Qd5
- 2.Bxd5#
- 2.Re3#
- 1...Qc6
- 2.Re3#
- 1...Qa7
- 2.Sd6#
- 2.Bd5#
- 1...Rb3
- 2.Sd6#
- 1...Rb6
- 2.Re3#
- 1...Rc3
- 2.Sd6#
- 1...Rc6
- 2.Bd5#
- 2.Re3#
- 1...Rd8
- 2.Re3#
- 1...Bd3
- 2.Sd6#
- 2.cxd3#
- 1...Se5!
- threat
- 1.Qg1?
- threat
- 2.Qe3#
- 2.Qd4#
- 1...f2
- 2.Qh1#
- 2.Qg2#
- 1...e1Q
- 2.Qd4#
- 1...e1R
- 2.Qd4#
- 1...Qd5
- 2.Bxd5#
- 2.Qe3#
- 1...Qa7
- 2.Bd5#
- 1...Rb3
- 2.Qd4#
- 1...Rb4
- 2.Sd6#
- 2.Qe3#
- 1...Rc3
- 2.Qd4#
- 1...Rc4
- 2.Qe3#
- 2.d3#
- 1...Rd8
- 2.Qe3#
- 1...Bb2
- 2.Sd6#
- 2.Qe3#
- 1...Se5
- 2.Rxe5#
- 2.Qe3#
- 1...Bc5!
- threat
- 1.Qb4+?
- 1...Rxb4
- 2.Sd6#
- 1...Rc4
- 2.Sd6#
- 1...Bc4
- 2.Sd6#
- 1...Bxb4!
- 1...Rxb4
- 1.c3+?
- 1...Bd3
- 2.Qxd3#
- 1...Rxb1!
- 1...Bd3
- 1.Sd3?
- Keys
- 1.Sd5!
- threat
- 2.Bf5#
- 1...Qxd5
- 2.Bxd5#
- 1...Se5
- 2.Rf4#
- 1...Bc5
- 2.Sc3#
- 1...Rb5
- 2.d3#
- 1...Rc5
- 2.Sd6#
- 1...Bb5
- 2.c4#
- 1...Se7
- 2.Rf4#
- 1...f2
- 2.Qh1#
- threat
- 1.Sd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 9
- Sets
- Q(j);N_GUARD::B(F),XQ(j)
- Q(j);N_GUARD::B(F)
- R(k);S_CUTB(b)::S(J)
- R(k);S_CUTQ(j)::B(F)
- R(l);S_CUTB(b)::S(J)
- R(l);S_CUTQ(j)::B(F)
- B(b);N_GUARD::S(J)
- B(b);S_CUTR(k)::QAB(A)+P(B)
- B(b);N_GUARD::S(J),XB(b)
- B(g);OGATE::P(B),XB(g)
- B(g);S_CUTR(k)::QAB(A)+P(B)
- S(h);SBLOCK,XS(D)::B(F)
- P(c);OGATEB::QAB(A)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- B(g);OGATE,XS(D)::P(B),XB(g)
- S(h);N_GUARD::R1(H)
- R(k);::S(D)
- B(g);::S(D)
- P(e);::B(F)
- Refutation
- B(b);
- Try
- S(D);
- Threat
- DUALS(3)
- Vars
- S(h);N_GUARD::R1(H)
- B(b);::S(D)
- R(k);::S(D)
- Refutation
- P(e);XS(D)
- Try
- S(D);XS(h)
- Threat
- DUALS(2)
- Vars
- R(l);P_SPINR(l),XP(B)::B(F)
- B(b);::R1(H)
- R(k);::R1(H)
- Refutation
- P(i);XS(D)
- Try
- R(E);XB(b)
- Threat
- DUALS(2)
- Vars
- R(l);XS(J)::R1(E)
- P(a);::S(J)
- Q(j);::R1(E)
- R(k);::S(J)
- R(k);::R1(E)
- R(l);::S(J)
- R(l);::R1(E)
- Refutation
- S(h);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- P(a);::QAR1(A)
- Q(j);N_GUARD::B(F)
- R(k);::QAR1(A)
- R(l);::QAR1(A)
- Refutation
- B(b);
- Try
- Q(A);CHECK
- Vars
- R(k);XQ(A)::S(J)
- R(l);P_SPINR(l)::S(J)
- B(g);P_SPINB(g)::S(J)
- Refutation
- B(b);XQ(A)
- Try
- P(B);CHECK
- Vars
- B(g);N_GUARD,P_SPINB(g)::QAB1(A),XB(g)
- Refutation
- R(k);XQ(A)
- Try
- Actual
- S(D);
- Threat
- B(F)
- Vars
- Q(j);OGATE,XS(D)::B(F),XQ(j)
- S(h);N_GUARD::R1(H)
- B(b);S_CUTR(l)::S(D)
- R(k);S_CUTB(g)::P(C)
- R(l);S_CUTB(b)::S(J)
- B(g);S_CUTR(k)::QAB(A)+P(B)
- P(c);OGATEB::QAB(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).