MESON Chess Problem Database
Problem Display
PID: 232866 (8/3p1Rrp/3p2pN/3Pk1P1/1NR1Bb2/4pPr1/6pQ/2n1K1B1 w - - 0 1)
Morra, Juan Carlos
Il Due Mosse, 1954
#2
11 + 11
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rxf3
- 2.Sg4#
- 1...Rh3
- 2.Sg4#
- 2.Qxf4#
- 1...Rg4
- 2.Sxg4#
- 1...Rxg5
- 2.Qxf4#
- 1...Rxf7
- 2.Sxf7#
- 1...Rg8
- 2.Re7#
- 1...Bxg5
- 2.Sg4#
- 1...Sa2
- 2.Sd3#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sd3+
- 2.Sxd3#
- 1...e2
- 2.Bd4#
- 1...Rxf3
- Tries
- 1.Kd1?
- 1...Rxf3
- 2.Sg4#
- 1...Rxg5
- 2.Qxf4#
- 1...Rxf7
- 2.Sxf7#
- 1...Bxg5
- 2.Sg4#
- 1...Rh3
- 2.Sg4#
- 2.Qxf4#
- 1...Rg4
- 2.Sxg4#
- 1...Rg8
- 2.Re7#
- 1...Sa2
- 2.Sd3#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...e2+!
- 1...Rxf3
- 1.Bf5?
- threat
- 2.Re4#
- 1...gxf5
- 2.Rxf5#
- 1...Sd3+!
- threat
- 1.Bxg6?
- threat
- 2.Re4#
- 2.Rf5#
- 1...Rxg5
- 2.Re4#
- 2.Qxf4#
- 1...Rxf7
- 2.Sxf7#
- 2.Re4#
- 1...hxg6
- 2.Re4#
- 1...Sd3+!
- threat
- 1.Rf6?
- 1...Sd3+
- 2.Sxd3#
- 1...Rxf3
- 2.Sg4#
- 1...Rxg5
- 2.Qxf4#
- 1...Bxg5
- 2.Sg4#
- 1...Sa2
- 2.Sd3#
- 1...Rh3
- 2.Sg4#
- 2.Qxf4#
- 1...Rg4
- 2.Sxg4#
- 1...Rf7
- 2.Sxf7#
- 1...Rg8
- 2.Sf7#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...e2
- 2.Bd4#
- 1...Re7!
- 1...Sd3+
- 1.Rf8?
- 1...Sd3+
- 2.Sxd3#
- 1...Rxf3
- 2.Sg4#
- 1...Rxg5
- 2.Qxf4#
- 1...Bxg5
- 2.Sg4#
- 1...Sa2
- 2.Sd3#
- 1...Rh3
- 2.Sg4#
- 2.Qxf4#
- 1...Rg4
- 2.Sxg4#
- 1...Rf7
- 2.Sxf7#
- 1...Rg8
- 2.Sf7#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...e2
- 2.Bd4#
- 1...Re7!
- 1...Sd3+
- 1.Qxg3?
- threat
- 2.Sg4#
- 2.Qxf4#
- 1...Sd3+
- 2.Sxd3#
- 1...Rxf7
- 2.Sg4#
- 2.Sxf7#
- 1...Se2
- 2.Sd3#
- 2.Sg4#
- 1...Bxg3+!
- threat
- 1.Qxg2?
- threat
- 2.Qb2#
- 1...Sd3+
- 2.Sxd3#
- 1...Sa2
- 2.Sd3#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...e2
- 2.Bd4#
- 1...Rxg2!
- threat
- 1.Qh4?
- threat
- 2.Qxf4#
- 1...Sd3+
- 2.Sxd3#
- 1...Rxf3
- 2.Sg4#
- 1...Rxf7
- 2.Sxf7#
- 1...Rg4
- 2.Sxg4#
- 1...Se2
- 2.Sd3#
- 1...Bxg5!
- threat
- 1.Kd1?
- Keys
- 1.Qh5!
- 1...Sd3+
- 2.Sxd3#
- 1...Rxf3
- 2.Sg4#
- 1...Rxg5
- 2.Sg4#
- 1...Rxf7
- 2.Sxf7#
- 1...Bxg5
- 2.f4#
- 1...gxh5
- 2.Rf5#
- 1...Rh3
- 2.Sg4#
- 1...Rg4
- 2.Sxg4#
- 1...Rg8
- 2.Re7#
- 1...Sa2
- 2.Sd3#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...e2
- 2.Bd4#
- 1...Sd3+
- 1.Qh5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(d);N_GUARD,P_SPINB(e),XP(D)::S(J)
- R(d);N_GUARD,P_SPINB(e)::S(J),XR(d)
- R(d);OGATE,P_SPINB(e),XP(I)::QAB1(C),XB(e)
- R(j);XR(K)::S(J),XR(j)
- R(j);N_GUARD::R(K)
- B(e);P_SPINR(d),XP(I)::S(J)
- S(a);N_GUARD::S(E)
- S(a);CHECK,N_GUARD::S(E),XS(a)
- P(c);OGATE::B(B)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- R(d);N_GUARD,P_SPINB(e),XP(D)::S(J)
- R(d);OGATE,P_SPINB(e),XP(I)::QAB1(C),XB(e)
- R(j);XR(K)::S(J),XR(j)
- B(e);P_SPINR(d),XP(I)::S(J)
- R(d);N_GUARD,P_SPINB(e)::S(J),XR(d)
- R(j);N_GUARD::R(K)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- Refutation
- P(c);CHECK
- Try
- B(G);
- Threat
- R1(F)
- Vars
- P(h);OGATE,XB(G)::R1(K),XP(h)
- Refutation
- S(a);CHECK
- Try
- B(G);XP(h)
- Threat
- DUALS(2)
- Vars
- P(k);XB(G)::R1(F)
- Refutation
- S(a);CHECK
- Try
- R(K);
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- R(d);N_GUARD,P_SPINB(e),XP(D)::S(J)
- R(d);OGATE,P_SPINB(e),XP(I)::QAB1(C),XB(e)
- B(e);P_SPINR(d),XP(I)::S(J)
- S(a);N_GUARD::S(E)
- R(d);N_GUARD,P_SPINB(e)::S(J),XR(d)
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- P(c);OGATE::B(B)
- Refutation
- R(j);
- Try
- R(K);
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- R(d);N_GUARD,P_SPINB(e),XP(D)::S(J)
- R(d);OGATE,P_SPINB(e),XP(I)::QAB1(C),XB(e)
- B(e);P_SPINR(d),XP(I)::S(J)
- S(a);N_GUARD::S(E)
- R(d);N_GUARD,P_SPINB(e)::S(J),XR(d)
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- P(c);OGATE::B(B)
- Refutation
- R(j);
- Try
- Q(C);P_PINB(e),XR(d)
- Threat
- DUALS(2)
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- Refutation
- B(e);CHECK,N_SPINB(e),XQ(C)
- Try
- Q(C);XP(b)
- Threat
- QAB(C)
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- S(a);N_GUARD::S(E)
- P(c);OGATE::B(B)
- Refutation
- R(d);XQ(C)
- Try
- Q(C);
- Threat
- QAB1(C),XB(e)
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- R(d);N_GUARD,XP(D)::S(J)
- R(j);XR(K)::S(J),XR(j)
- R(d);N_GUARD::S(J),XR(d)
- S(a);N_GUARD::S(E)
- Refutation
- B(e);XP(I)
- Try
- Actual
- Q(C);
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- R(d);N_GUARD,XP(D)::S(J)
- R(d);N_GUARD,P_SPINR(d),XP(I)::S(J)
- R(j);XR(K)::S(J),XR(j)
- B(e);OGATE,P_SPINB(e),XP(I)::P(D)
- P(h);N_GUARD,XQ(C)::R1(K)
- R(d);N_GUARD::S(J)
- R(d);N_GUARD::S(J),XR(d)
- R(j);N_GUARD::R(K)
- S(a);N_GUARD::S(E)
- P(c);OGATE::B(B)
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).