MESON Chess Problem Database
Problem Display
PID: 102436 (1B1N4/4p2N/1R1p4/K3kpR1/b3P3/4Q3/8/5r1n w - - 0 1)
Morra, Juan Carlos
Le Courrier des Echecs, 1956
#2
8 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rxf5#
- 1...Rb1
- 2.Rxf5#
- 1...Rc1
- 2.Rxf5#
- 1...Rd1
- 2.Rxf5#
- 1...Re1
- 2.Rxf5#
- 1...Rg1
- 2.Rxf5#
- 1...Bd1
- 2.Rb5#
- 1...Bc2
- 2.Rb5#
- 1...Bb5
- 2.Rxb5#
- 1...Sf2
- 2.Rxf5#
- 1...e6
- 2.Sf7#
- 2.Bxd6#
- 1...Ra1
- Tries
- 1.Kxa4?
- threat
- 2.Rb5#
- 1...Rb1
- 2.Rxf5#
- 1...Rc1
- 2.Rxf5#
- 1...Rd1
- 2.Rxf5#
- 1...Ra1+!
- threat
- 1.Rg6?
- threat
- 2.Sf7#
- 2.Re6#
- 1...Bb3
- 2.Sc6#
- 1...Bd7
- 2.Sf7#
- 1...Be8
- 2.Re6#
- 1...e6
- 2.Sf7#
- 2.Bxd6#
- 2.Rxe6#
- 1...fxe4!
- threat
- 1.Rxd6?
- threat
- 2.Sf7#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 2.exf5#
- 1...Rb1
- 2.Sf7#
- 2.Rxf5#
- 2.Rd5#
- 2.Rb6#
- 2.Re6#
- 2.exf5#
- 1...Rc1
- 2.Sf7#
- 2.Rxf5#
- 2.Rd5#
- 2.Rc6#
- 2.Re6#
- 2.exf5#
- 1...Rd1
- 2.Sf7#
- 2.Rxf5#
- 2.Rxd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Re6#
- 2.exf5#
- 1...Re1
- 2.Sf7#
- 2.Rxf5#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 1...Rf3
- 2.Sf7#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 1...Rf4
- 2.Sf7#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 2.Qd4#
- 1...Bd1
- 2.Sc6#
- 2.Sf7#
- 2.Rxd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 2.exf5#
- 1...Bc2
- 2.Sc6#
- 2.Sf7#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 1...Bb3
- 2.Sc6#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 2.exf5#
- 1...Bc6
- 2.Sxc6#
- 2.Sf7#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 1...Bd7
- 2.Sf7#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rxd7#
- 2.exf5#
- 1...Be8
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 2.exf5#
- 1...Sf2
- 2.Sf7#
- 2.Rxf5#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 1...Sg3
- 2.Sf7#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rdg6#
- 2.Rh6#
- 2.Rd7#
- 1...e6
- 2.Sf7#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rxe6#
- 2.Rd7#
- 2.exf5#
- 1...exd6!
- threat
- 1.Kxa4?
- Keys
- 1.Sf6!
- threat
- 2.Sg4#
- 1...Kxf6
- 2.e5#
- 1...exf6
- 2.Bxd6#
- 1...Rg1
- 2.Rxf5#
- 1...Rf4
- 2.Qc3#
- 1...Bd1
- 2.Sd7#
- 1...Sf2
- 2.Rxf5#
- threat
- 1.Sf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- R(a);N_GUARD::R1(D),XP(e)
- B(c);N_GUARD::R(E)
- B(c);N_GUARD::R(E),XB(c)
- S(b);S_CUTR(a)::R1(D),XP(e)
- Tries
- Try
- K(C);P-FLIGHT,XB(c)
- Threat
- R(E)
- Vars
- R(a);N_GUARD::R1(D),XP(e)
- Refutation
- R(a);CHECK
- Try
- R(D);N_PINP(e),P_PINP(f)
- Threat
- DUALS(2)
- Vars
- B(c);N_GUARD::S(H)
- B(c);::S(H)
- B(c);::R1(D)
- Refutation
- P(e);N_SPINP(f),P_SPINP(e),XP(B)
- Try
- R(E);XP(f)
- Threat
- DUALS(15)
- Refutation
- P(g);XR(E)
- Try
- Actual
- S(F);
- Threat
- S(F)
- Vars
- K(d);N_SPINP(e),OGATE,P_SPINP(f),S_FLIGHT,XS(F)::P(B)
- P(g);N_GUARD,SBLOCK,XS(F)::B(G),XP(f)
- R(a);N_GUARD::R1(D),XP(e)
- R(a);SBLOCK::QAB(A)
- B(c);N_GUARD::S(F)
- S(b);S_CUTR(a)::R1(D),XP(e)
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