MESON Chess Problem Database
Problem Display
PID: 134019 (8/3pB3/1QrR2pN/1p2kP2/qp2np2/1r6/Bp2R3/4NKb1 w - - 0 1)
Morra, Juan Carlos
The Field, 1964
(First published on Thu May 21 1964)
#2
9 + 12
SOLUTION
- SOUND
- Sets
- 1...Ra3
- 2.Rd5#
- 1...Rbc3
- 2.Rd5#
- 1...Rd3
- 2.Sxd3#
- 1...Re3
- 2.Rd5#
- 2.Qd4#
- 1...Rf3+
- 2.Sxf3#
- 1...Rg3
- 2.Rd5#
- 1...Rh3
- 2.Rd5#
- 1...Rc1
- 2.Bf6#
- 1...Rc2
- 2.Bf6#
- 1...Rcc3
- 2.Bf6#
- 1...Rc4
- 2.Bf6#
- 1...Rc5
- 2.Bf6#
- 1...Rxd6
- 2.Qxd6#
- 1...Rc7
- 2.Bf6#
- 1...Rc8
- 2.Bf6#
- 1...Bh2
- 2.Qd4#
- 1...Be3
- 2.Sf3#
- 1...Bd4
- 2.Qxd4#
- 1...gxf5
- 2.Sf7#
- 1...Ra3
- Tries
- 1.Bxb3?
- threat
- 2.Sd3#
- 2.Sf3#
- 2.Rd5#
- 1...Rxd6
- 2.Sf3#
- 2.Qxd6#
- 1...gxf5
- 2.Sd3#
- 2.Sf3#
- 2.Sf7#
- 1...f3
- 2.Sd3#
- 1...b1Q
- 2.Rd5#
- 1...b1B
- 2.Sf3#
- 2.Rd5#
- 1...b1R
- 2.Rd5#
- 1...Qa1
- 2.Rd5#
- 1...Rc1
- 2.Bf6#
- 2.Rd5#
- 1...Rc3
- 2.Bf6#
- 2.Rd5#
- 1...Rc4
- 2.Sd3#
- 2.Sf3#
- 2.Bf6#
- 1...Rc5
- 2.Sd3#
- 2.Sf3#
- 2.Bf6#
- 1...Qxb3!
- threat
- 1.Qxc6?
- threat
- 2.Bf6#
- 2.Rxe4#
- 2.Rd5#
- 2.Qxe4#
- 2.Qd5#
- 1...Rf3+
- 2.Sxf3#
- 1...gxf5
- 2.Sf7#
- 2.Bf6#
- 2.Rd5#
- 2.Qd5#
- 1...f3
- 2.Rxe4#
- 2.Qxe4#
- 1...b1Q
- 2.Bf6#
- 2.Rd5#
- 2.Qd5#
- 1...b1B
- 2.Bf6#
- 2.Rd5#
- 2.Qd5#
- 1...Qa8
- 2.Bf6#
- 2.Rxe4#
- 2.Rd5#
- 1...Rd3
- 2.Sxd3#
- 2.Bf6#
- 2.Rxe4#
- 2.Qxe4#
- 1...Re3
- 2.Rd5#
- 2.Qd5#
- 1...Be3
- 2.Sf3#
- 2.Rd5#
- 2.Qd5#
- 1...dxc6!
- threat
- 1.Qb8?
- threat
- 2.Bf6#
- 2.Qh8#
- 1...Rf3+
- 2.Sxf3#
- 1...Rxd6
- 2.Qxd6#
- 1...Qa8
- 2.Bf6#
- 1...Re3
- 2.Rd5#
- 1...Rc7
- 2.Qh8#
- 1...Rc8
- 2.Bf6#
- 1...Be3
- 2.Sf3#
- 1...f3!
- threat
- 1.Bxb3?
- Keys
- 1.Bb1!
- threat
- 2.Rxe4#
- 1...Rf3+
- 2.Sxf3#
- 1...Rxd6
- 2.Qxd6#
- 1...gxf5
- 2.Sf7#
- 1...Rd3
- 2.Sxd3#
- 1...Re3
- 2.Qd4#
- 1...Rc2
- 2.Bf6#
- 1...Rc4
- 2.Bf6#
- 1...Be3
- 2.Sf3#
- threat
- 1.Bb1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 11
- Sets
- R(c);::R1(G)
- R(c);N_GUARD::S(A),XR(c)
- R(c);CHECK,N_GUARD::S(A),XR(c)
- R(j);P_PINS(A)::B(I)
- R(j);::B(I)
- R(j);OGATE,XR(G)::QAB1(F),XR(j)
- B(a);N_GUARD::QAB1(F)
- B(a);N_SPINS(f),S_CUTR(c)::S(A)
- B(a);N_GUARD::QAB1(F),XB(a)
- P(k);SBLOCK,XP(E)::S(H)
- Tries
- Try
- B(C);XR(c)
- Threat
- DUALS(3)
- Vars
- P(g);::S(A)
- P(b);P_PINS(A)::R1(G)
- Q(d);P_PINS(A)::R1(G)
- Refutation
- Q(d);XB(C)
- Try
- Q(F);XR(j)
- Threat
- DUALS(5)
- Vars
- R(c);CHECK,N_GUARD::S(A),XR(c)
- Refutation
- P(l);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,N_GUARD::S(A),XR(c)
- R(j);OGATE,P_SPINR(j),XR(G)::QAB1(F),XR(j)
- Q(d);::B(I)
- R(c);N_SPINS(f)::QAB(F)+R(G),DCHECK
- R(j);::QAB(F)
- R(j);::B(I)
- B(a);N_SPINS(f),S_CUTR(c)::S(A)
- Refutation
- P(g);
- Try
- Actual
- B(C);
- Threat
- R1(D),XS(f)
- Vars
- R(c);CHECK,N_GUARD::S(A),XR(c)
- R(j);OGATE,XR(G)::QAB1(F),XR(j)
- P(k);SBLOCK,XP(E)::S(H)
- R(c);N_GUARD::S(A),XR(c)
- R(c);N_SPINS(f),S_CUTB(a)::QAB1(F)
- R(j);::B(I)
- B(a);N_SPINS(f),S_CUTR(c)::S(A)
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