MESON Chess Problem Database
Problem Display
PID: 69830 (3r1b2/N1P5/3p4/1N2Pp2/RPkB1p2/pp2P3/r1n3BK/2QR4 w - - 0 1)
Aloni, Yoel
Navon, Emanuel
Scacchi e Scienze Applicate, 1991
#2
12 + 10
SOLUTION
- SOUND
- Sets
- 1...Rb2
- 2.Sxa3#
- 1...b2
- 2.Qxc2#
- 1...d5
- 2.Bf1#
- 1...Rb2
- Tries
- 1.Sxd6+?
- 1...Rxd6
- 2.b5#
- 1...Bxd6!
- 1...Rxd6
- 1.Ba1?
- threat
- 2.Bf1#
- 2.Bd5#
- 2.Rd4#
- 1...fxe3
- 2.Bd5#
- 2.Rd4#
- 1...b2
- 2.Bd5#
- 2.Qxc2#
- 1...f3
- 2.Bf1#
- 2.Rd4#
- 1...d5
- 2.Bf1#
- 2.Rd4#
- 1...dxe5!
- threat
- 1.Bb2?
- threat
- 2.Bf1#
- 2.Bd5#
- 2.Rd4#
- 1...fxe3
- 2.Bd5#
- 2.Rd4#
- 1...f3
- 2.Bf1#
- 2.Rd4#
- 1...d5
- 2.Bf1#
- 2.Rd4#
- 1...dxe5!
- threat
- 1.Bc3?
- threat
- 2.Bf1#
- 2.Bd5#
- 1...Sxe3
- 2.Rd4#
- 1...Sxb4
- 2.Bb2#
- 1...fxe3
- 2.Bd5#
- 1...b2
- 2.Bd5#
- 1...Sa1
- 2.Rd4#
- 1...Se1
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...f3
- 2.Bf1#
- 1...d5
- 2.Bf1#
- 1...dxe5!
- threat
- 1.Bb6?
- threat
- 2.Bf1#
- 2.Bd5#
- 2.Rd4#
- 1...fxe3
- 2.Bd5#
- 2.Rd4#
- 1...b2
- 2.Bd5#
- 2.Qxc2#
- 1...f3
- 2.Bf1#
- 2.Rd4#
- 1...d5
- 2.Bf1#
- 2.Rd4#
- 1...dxe5!
- threat
- 1.Qd2?
- threat
- 2.Qc3#
- 2.Qe2#
- 2.Qd3#
- 1...Sxe3
- 2.Qc3#
- 2.Qd3#
- 1...Sxb4
- 2.Rxb4#
- 2.Qc3#
- 2.Qxb4#
- 2.Qd3#
- 1...Sxd4
- 2.Qc3#
- 2.Qd3#
- 2.Qxd4#
- 1...b2
- 2.Qc3#
- 2.Qxc2#
- 2.Qd3#
- 1...Sa1
- 2.Qc3#
- 2.Qd3#
- 1...Se1
- 2.Qc3#
- 1...f3!
- threat
- 1.Qxc2+?
- 1...Rxc2
- 2.Sxa3#
- 1...bxc2!
- 1...Rxc2
- 1.e4?
- threat
- 2.Bf1#
- 1...b2
- 2.Qxc2#
- 1...fxe4!
- threat
- 1.cxd8Q?
- threat
- 2.Qc7#
- 2.Qc8#
- 1...dxe5
- 2.Bf1#
- 2.Bd5#
- 2.Qd5#
- 1...b2
- 2.Qxc2#
- 1...d5
- 2.Bf1#
- 2.Bxd5#
- 2.Qxd5#
- 1...f3!
- threat
- 1.cxd8R?
- threat
- 2.Rc8#
- 1...dxe5
- 2.Bf1#
- 2.Bd5#
- 1...b2
- 2.Qxc2#
- 1...d5
- 2.Bf1#
- 2.Bxd5#
- 1...f3!
- threat
- 1.c8S?
- threat
- 2.Sb6#
- 1...b2
- 2.Qxc2#
- 1...Rxc8!
- threat
- 1.Sxd6+?
- Keys
- 1.Sc3!
- threat
- 2.Bf1#
- 2.Bd5#
- 1...Sxe3
- 2.b5#
- 1...Sxb4
- 2.Sxa2#
- 1...Sxd4
- 2.Rxd4#
- 1...fxe3
- 2.Bd5#
- 1...dxe5
- 2.Bf1#
- 1...b2
- 2.Bd5#
- 1...Sa1
- 2.b5#
- 1...Se1
- 2.b5#
- 1...f3
- 2.Bf1#
- 1...d5
- 2.Bf1#
- threat
- 1.Sc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 8
- REMOVED MATES = 1
- Sets
- R(a);N_GUARD::S(I),XP(c)
- P(d);N_GUARD,S_CUTR(a)::QAR2(A),XS(b)
- P(h);SBLOCK::B(C)
- Tries
- Try
- S(I);CHECK,XP(h)
- Vars
- R(i);XS(I)::R(F)+P(G)
- Refutation
- B(j);XS(I)
- Try
- B(H);
- Threat
- DUALS(3)
- Refutation
- P(h);XP(J)
- Try
- B(H);
- Threat
- DUALS(3)
- Refutation
- P(h);XP(J)
- Try
- B(H);N_PINS(b)
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD,P_PINB(C),XP(E)::R1(B)
- S(b);OGATEB,P_PINB(C),P_SPINS(b),XP(G)::QAR(A)+B(H)
- P(f);XP(E)::B(C)
- P(d);::B(C)
- S(b);N_GUARD,P_PINB(C)::R1(B)
- S(b);N_GUARD,P_PINB(C)::R1(B),XS(b)
- P(f);::B(C)
- P(h);::B(C)
- Refutation
- P(h);XP(J)
- Try
- B(H);
- Threat
- DUALS(3)
- Refutation
- P(h);XP(J)
- Try
- Q(A);N_PINS(b)
- Threat
- DUALS(3)
- Vars
- S(b);::QAR1(A)
- Refutation
- P(f);
- Try
- Q(A);CHECK,XS(b)
- Vars
- R(a);P_PINB(C),XQ(A)::S(I),XP(c)
- Refutation
- P(d);XQ(A)
- Try
- P(E);
- Threat
- B(C)
- Vars
- P(d);N_GUARD,S_CUTR(a)::QAR2(A),XS(b)
- Refutation
- P(g);XP(E)
- Try
- P(L);XR(i)
- Threat
- DUALS(2)
- Vars
- P(d);N_GUARD,S_CUTR(a)::QAR2(A),XS(b)
- Refutation
- P(f);
- Try
- P(L);XR(i)
- Threat
- R(L)
- Vars
- P(d);N_GUARD,S_CUTR(a)::QAR2(A),XS(b)
- Refutation
- P(f);
- Try
- P(L);
- Threat
- S(L)
- Vars
- P(d);N_GUARD,S_CUTR(a)::QAR2(A),XS(b)
- Refutation
- R(i);XS(L)
- Try
- Actual
- S(I);N_PINS(b)
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD,P_PINB(C),XP(E)::R(F)+P(G)
- S(b);P_PINB(C),P_SPINS(b),XP(G)::QAR(A)+S(I),XR(a)
- S(b);OGATE,P_PINB(C),XB(H)::R1(B),XS(b)
- P(f);XP(E)::B(C)
- P(h);XP(J)::B(C)
- P(d);::B(C)
- S(b);N_GUARD,P_PINB(C)::R(F)+P(G)
- P(f);::B(C)
- P(h);::B(C)
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