MESON Chess Problem Database
Problem Display
PID: 132801 (3R4/4pp2/5N1Q/r3kBpp/pqpp3b/2n3P1/1B1NPR2/4K3 w - - 0 1)
Morra, Juan Carlos
The Field, 1958
(First published on Thu Nov 6 1958)
#2
10 + 12
SOLUTION
- SOUND
- Sets
- 1...Qa3
- 2.Sxc4#
- 1...Qd6
- 2.Sxc4#
- 1...Qxb2
- 2.Sxc4#
- 1...Qb6
- 2.Sxc4#
- 1...Qb7
- 2.Sxc4#
- 1...Qb8
- 2.Sxc4#
- 1...Sb1
- 2.Bxd4#
- 1...Sd1
- 2.Bxd4#
- 1...Sa2
- 2.Bxd4#
- 1...Se4
- 2.Bxd4#
- 1...Sb5
- 2.Rd5#
- 1...Sd5
- 2.Sd7#
- 1...Qa3
- Tries
- 1.Bh3?
- threat
- 2.Sf3#
- 1...Bxg3
- 2.Qxg5#
- 1...Sxe2
- 2.Rxe2#
- 1...exf6
- 2.Qxf6#
- 1...Qb7
- 2.Sxc4#
- 1...Sb1
- 2.Bxd4#
- 1...Sd1
- 2.Bxd4#
- 1...Sa2
- 2.Bxd4#
- 1...Se4
- 2.Bxd4#
- 1...Sb5
- 2.Rd5#
- 1...Sd5
- 2.Sd7#
- 1...g4!
- threat
- 1.Bc8?
- threat
- 2.Sf3#
- 2.Rf5#
- 1...Bxg3
- 2.Qxg5#
- 1...Sxe2
- 2.Rxe2#
- 2.Rf5#
- 1...exf6
- 2.Rf5#
- 2.Qxf6#
- 1...Qb7
- 2.Sxc4#
- 2.Rf5#
- 1...Sb1
- 2.Bxd4#
- 2.Rf5#
- 1...Sd1
- 2.Bxd4#
- 2.Rf5#
- 1...Sa2
- 2.Bxd4#
- 2.Rf5#
- 1...Se4
- 2.Bxd4#
- 2.Rf5#
- 1...Sb5
- 2.Rf5#
- 2.Rd5#
- 1...Sd5
- 2.Sd7#
- 2.Rf5#
- 1...g4
- 2.Rf5#
- 2.Qf4#
- 1...e6!
- threat
- 1.Rd5+?
- 1...Sxd5
- 2.Sd7#
- 1...Rxd5!
- 1...Sxd5
- 1.Qg7?
- threat
- 2.Sg4#
- 1...Qd6
- 2.Sxc4#
- 1...g4
- 2.Sxg4#
- 1...exf6!
- threat
- 1.Qh8?
- threat
- 2.Sg4#
- 1...Qd6
- 2.Sxc4#
- 1...g4
- 2.Sxg4#
- 1...exf6!
- threat
- 1.e4?
- threat
- 2.Sf3#
- 2.Sd7#
- 1...Bxg3
- 2.Sd7#
- 1...Sxe4
- 2.Bxd4#
- 1...exf6
- 2.Sf3#
- 1...Qd6
- 2.Sf3#
- 2.Sxc4#
- 1...Qb5
- 2.Sf3#
- 1...Qb7
- 2.Sf3#
- 2.Sxc4#
- 1...Rd5
- 2.Sf3#
- 1...Ra7
- 2.Sf3#
- 1...Sb1
- 2.Sd7#
- 2.Bxd4#
- 1...Sd1
- 2.Sd7#
- 2.Bxd4#
- 1...Sa2
- 2.Sd7#
- 2.Bxd4#
- 1...Se2
- 2.Sd7#
- 1...Sb5
- 2.Sd7#
- 2.Rd5#
- 1...Sd5
- 2.Sd7#
- 1...d3
- 2.Sf3#
- 1...g4
- 2.Sd7#
- 1...e6
- 2.Sf3#
- 1...dxe4 ep!
- threat
- 1.Bh3?
- Keys
- 1.Bg4!
- threat
- 2.Sf3#
- 1...Bxg3
- 2.Qxg5#
- 1...Sxe2
- 2.Rxe2#
- 1...hxg4
- 2.Sxg4#
- 1...exf6
- 2.Qxf6#
- 1...Qb7
- 2.Sxc4#
- 1...Sb1
- 2.Bxd4#
- 1...Sd1
- 2.Bxd4#
- 1...Sa2
- 2.Bxd4#
- 1...Se4
- 2.Bxd4#
- 1...Sb5
- 2.Rd5#
- 1...Sd5
- 2.Sd7#
- threat
- 1.Bg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- Q(c);N_GUARD::S(C),XP(d)
- Q(c);N_GUARD,XB(B)::S(C),XP(d)
- S(a);OGATE,P_PINS(C),P_SPINP(e)::B(B),XP(e)
- S(a);N_GUARD,P_PINS(C),P_SPINP(e),S_CUTR(g)::R1(J)
- S(a);P_PINS(C),P_SPINP(e),SBLOCK::S(H)
- Tries
- Try
- B(G);
- Threat
- S(C)
- Vars
- B(f);N_GUARD,P_PINR(E),XP(F)::QAR2(I),XP(i)
- S(a);OGATE,P_PINS(C),P_SPINP(e),XP(D)::R(E),XS(a)
- P(k);OGATE,XS(H)::QAB1(I),XP(k)
- Q(c);N_GUARD::S(C),XP(d)
- S(a);OGATE,P_PINS(C),P_SPINP(e)::B(B),XP(e)
- S(a);N_GUARD,P_PINS(C),P_SPINP(e),S_CUTR(g)::R1(J)
- S(a);P_PINS(C),P_SPINP(e),SBLOCK::S(H)
- Refutation
- P(i);
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- B(f);N_GUARD,P_PINR(E),XP(F)::QAR2(I),XP(i)
- Refutation
- P(k);
- Try
- R(J);CHECK
- Vars
- S(a);P_PINS(C),P_SPINP(e),SBLOCK,XR(J)::S(H)
- Refutation
- R(g);XR(J)
- Try
- Q(I);
- Threat
- QAB(I)+S(H),DCHECK
- Vars
- Q(c);N_GUARD::S(C),XP(d)
- P(i);::QAB(I)+S(H),DCHECK,XP(i)
- Refutation
- P(k);P_SPINP(k),XS(H)
- Try
- Q(I);
- Threat
- QAB(I)+S(H),DCHECK
- Vars
- Q(c);N_GUARD::S(C),XP(d)
- P(i);::QAB(I)+S(H),DCHECK,XP(i)
- Refutation
- P(k);P_SPINP(k),XS(H)
- Try
- P(D);
- Threat
- DUALS(2)
- Vars
- B(f);P_PINR(E),XP(F)::S(H)
- S(a);OGATE,P_PINS(C),P_SPINP(e),XP(D)::B(B),XP(e)
- P(k);XS(H)::S(C)
- Q(c);::S(C)
- R(g);::S(C)
- S(a);P_PINS(C),P_SPINP(e)::S(H)
- P(e);P_SPINS(a)::S(C)
- P(i);::S(H)
- P(k);::S(C)
- Refutation
- P(e);EP,P_SPINS(a),XP(D)
- Try
- Actual
- B(G);
- Threat
- S(C)
- Vars
- B(f);N_GUARD,P_PINR(E),XP(F)::QAR2(I),XP(i)
- S(a);OGATE,P_PINS(C),P_SPINP(e),XP(D)::R(E),XS(a)
- P(j);XB(G)::S(H),XP(j)
- P(k);OGATE,XS(H)::QAB1(I),XP(k)
- Q(c);N_GUARD::S(C),XP(d)
- S(a);OGATE,P_PINS(C),P_SPINP(e)::B(B),XP(e)
- S(a);N_GUARD,P_PINS(C),P_SPINP(e),S_CUTR(g)::R1(J)
- S(a);P_PINS(C),P_SPINP(e),SBLOCK::S(H)
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