MESON Chess Problem Database
Problem Display
PID: 152666 (N2N4/8/n1PkPP2/1Rp5/2qBP3/nQp5/8/2KR4 w - - 0 1)
Lider, Valentin Viktorovich
L'Italia Scacchistica, 1985
#2
11 + 6
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Qd5#
- 2.e5#
- 1...Qe2
- 2.Qd5#
- 1...Qd3
- 2.Qd5#
- 2.e5#
- 1...Qxb5
- 2.Qd5#
- 2.e5#
- 1...Qd5
- 2.Qxd5#
- 1...Qxe6
- 2.Qxe6#
- 1...Qa4
- 2.Qd5#
- 2.e5#
- 1...Qb4
- 2.Qd5#
- 2.e5#
- 1...c2
- 2.Qg3#
- 1...cxd4
- 2.e5#
- 1...Qf1
- Tries
- 1.Sb7+?
- 1...Kxc6
- 2.Rb6#
- 1...Kxe6!
- 1...Kxc6
- 1.Sf7+?
- 1...Kxc6
- 2.Rb6#
- 1...Kxe6!
- 1...Kxc6
- 1.Bg1+?
- 1...Qd3
- 2.Bh2#
- 1...Qd5
- 2.Bh2#
- 2.Rxd5#
- 2.Qxd5#
- 1...Qd4
- 2.Bh2#
- 1...Ke5!
- 1...Qd3
- 1.Bf2+?
- 1...Qd3
- 2.Bg3#
- 1...Qd5
- 2.Bg3#
- 2.Rxd5#
- 2.Qxd5#
- 1...Qd4
- 2.Bg3#
- 1...Ke5!
- 1...Qd3
- 1.Bxc3+?
- 1...Qd3
- 2.Rxd3#
- 2.e5#
- 1...Qd5
- 2.Rxd5#
- 2.Qxd5#
- 2.e5#
- 1...Qd4!
- 1...Qd3
- 1.Be3+?
- 1...Qd3
- 2.Bf4#
- 1...Qd5
- 2.Bf4#
- 2.Rxd5#
- 2.Qxd5#
- 1...Qd4
- 2.Bf4#
- 1...Ke5!
- 1...Qd3
- 1.Rxc5?
- threat
- 2.e5#
- 1...Qxe6
- 2.Sb7#
- 2.Qxe6#
- 1...Qxd4
- 2.Sb7#
- 1...Sxc5
- 2.Qb8#
- 1...Qe2
- 2.Sb7#
- 2.Sf7#
- 2.Rd5#
- 2.Qd5#
- 1...Qd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Qxc5!
- threat
- 1.Qxc4?
- threat
- 2.Bxc3#
- 2.Qd5#
- 2.e5#
- 1...Sxb5
- 2.Qd5#
- 2.e5#
- 1...cxd4
- 2.Sb7#
- 2.Sf7#
- 2.Rxd4#
- 2.Rd5#
- 2.Qd5#
- 2.Qxd4#
- 2.e5#
- 1...Sb1
- 2.Qd5#
- 2.e5#
- 1...Sc2
- 2.Qd5#
- 2.e5#
- 1...Sb4
- 2.Qxc5#
- 2.e5#
- 1...Sc7
- 2.Qxc5#
- 2.e5#
- 1...c2
- 2.Qd5#
- 2.e5#
- 1...Sxc4!
- threat
- 1.c7?
- threat
- 2.Rb6#
- 2.c8S#
- 1...Qxb3
- 2.c8S#
- 1...Qxb5
- 2.Qd5#
- 2.e5#
- 2.c8S#
- 1...Qxe6
- 2.Qxe6#
- 1...Sxb5
- 2.c8S#
- 1...Sxc7
- 2.Rb6#
- 1...cxd4
- 2.e5#
- 1...Qd5
- 2.Qxd5#
- 2.c8S#
- 1...Qa4
- 2.Qd5#
- 2.e5#
- 2.c8S#
- 1...Qb4
- 2.Qd5#
- 2.e5#
- 2.c8S#
- 1...Sb4
- 2.c8S#
- 1...Sb8
- 2.cxb8Q#
- 2.cxb8B#
- 2.c8S#
- 1...Qxd4!
- threat
- 1.e7?
- threat
- 2.e8S#
- 1...Qxd4
- 2.Qe6#
- 1...Qe6
- 2.Qxe6#
- 1...Qf7
- 2.e5#
- 1...Qg8
- 2.e5#
- 1...Sc7!
- threat
- 1.Sb7+?
- Keys
- 1.Qxc3!
- threat
- 2.Bxc5#
- 2.Be5#
- 1...Qxc3+
- 2.Bxc3#
- 1...Qxd4
- 2.Qg3#
- 1...Sxb5
- 2.Be5#
- 1...cxd4
- 2.e5#
- 1...Qd3
- 2.Be5#
- 1...Qd5
- 2.Be5#
- threat
- 1.Qxc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 3
- Sets
- Q(c);OGATE::QAR1(C)
- Q(c);OGATE::QAR1(C),XQ(c)
- Q(c);OGATE,XP(H)::QAR1(C),XQ(c)
- P(b);OGATE::QAB(C)
- P(d);P_SPINP(d),XB(D)::P(E)
- Tries
- Try
- S(K);CHECK
- Vars
- K(f);P-FLIGHT,XP(G)::R1(F)
- Refutation
- K(f);P-FLIGHT,P_SPINQ(c),XP(H)
- Try
- S(K);CHECK
- Vars
- K(f);P-FLIGHT,XP(G)::R1(F)
- Refutation
- K(f);P-FLIGHT,P_SPINQ(c),XP(H)
- Try
- B(D);CHECK
- Vars
- Q(c);P_SPINQ(c)::B(D)
- Refutation
- K(f);P_SPINP(d),S_FLIGHT
- Try
- B(D);CHECK
- Vars
- Q(c);P_SPINQ(c)::B(D)
- Refutation
- K(f);P_SPINP(d),S_FLIGHT
- Try
- B(D);CHECK,P_SPINB(D),XP(b)
- Refutation
- Q(c);N_PINB(D),P_SPINQ(c)
- Try
- B(D);CHECK
- Vars
- Q(c);P_SPINQ(c)::B(D)
- Refutation
- K(f);P_SPINP(d),S_FLIGHT
- Try
- R(F);XP(d)
- Threat
- P(E)
- Vars
- Q(c);P_SPINQ(c),XB(D)::S(K)
- S(e);N_GUARD,XR(F)::QAB(C)
- Refutation
- Q(c);XR(F)
- Try
- Q(C);XQ(c)
- Threat
- DUALS(3)
- Refutation
- S(a);XQ(C)
- Try
- P(G);
- Threat
- DUALS(2)
- Vars
- Q(c);XQ(C)::P=S
- Q(c);OGATE,XP(H)::QAR1(C),XQ(c)
- S(a);XR(F)::P=S
- S(e);XP(G)::R(F)
- P(d);P_SPINP(d),XB(D)::P(E)
- S(e);::P=S
- Refutation
- Q(c);P_SPINQ(c),XB(D)
- Try
- P(H);
- Threat
- P=S
- Vars
- Q(c);OGATE,P_SPINQ(c),XB(D)::QAR1(C)
- Q(c);OGATE::QAR1(C),XQ(c)
- Q(c);::P(E)
- Refutation
- S(e);
- Try
- Actual
- Q(C);P_SPINQ(C),XP(b)
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATE,XQ(C)::R(B)+B(D),XQ(c)
- Q(c);N_PINQ(C),P_SPINQ(c),XB(D)::QAB(C)
- S(a);XR(F)::R(B)+B(D),DCHECK
- P(d);P_SPINP(d),XB(D)::P(E)
- Q(c);N_PINQ(C)::B(D)
Developed and maintained by Brian Stephenson.
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