MESON Chess Problem Database
Problem Display
PID: 247622 (8/3p3K/8/Br5p/Bn1R4/1RNN4/1pk4q/1r2nQ2 w - - 0 1)
Cristoffanini, Guido
British Chess Magazine, 1932
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Qe2#
- 1...Qg3
- 2.Qe2#
- 1...Qd6
- 2.Qe2#
- 2.Qf2#
- 1...Qc7
- 2.Qe2#
- 2.Qf2#
- 1...Qb8
- 2.Qe2#
- 2.Qf2#
- 1...Qh1
- 2.Qe2#
- 2.Qf2#
- 1...Qd2
- 2.Ra3#
- 1...Qe2
- 2.Qxe2#
- 1...Qf2
- 2.Qxf2#
- 1...Qh3
- 2.Qe2#
- 2.Qf2#
- 1...Qh4
- 2.Qe2#
- 1...Sg2
- 2.Qe2#
- 2.Qf2#
- 1...Sa2
- 2.Rxb2#
- 1...Sd5
- 2.Rxb2#
- 1...Sa6
- 2.Rxb2#
- 1...Sc6
- 2.Rxb2#
- 1...Qg1
- Tries
- 1.Sa2?
- threat
- 2.Rxb2#
- 1...Kd2
- 2.Sxe1#
- 1...Sexd3
- 2.Rbxd3#
- 1...Sbxd3
- 2.Rxb5#
- 1...Kd1!
- threat
- 1.Se4?
- threat
- 2.Rxb2#
- 2.Ra3#
- 2.Rc3#
- 2.Rbxb4#
- 1...Rxa5
- 2.Rxb2#
- 2.Rc3#
- 1...Sexd3
- 2.Ra3#
- 2.Rc3#
- 2.Rbxd3#
- 2.Rbxb4#
- 2.Rc4#
- 1...Sbxd3
- 2.Rc3#
- 1...Ra1
- 2.Rxb2#
- 1...Rc1
- 2.Rxb2#
- 1...Rd1
- 2.Rxb2#
- 1...Sa2
- 2.Rxb2#
- 2.Rc3#
- 2.Rbb4#
- 2.Rxb5#
- 1...Sd5
- 2.Rxb2#
- 2.Rc3#
- 2.Rbb4#
- 2.Rxb5#
- 1...Sa6
- 2.Rxb2#
- 2.Rc3#
- 2.Rbb4#
- 2.Rxb5#
- 1...Sc6
- 2.Rxb2#
- 2.Rc3#
- 2.Rbb4#
- 2.Rxb5#
- 1...Kd1!
- threat
- 1.Sxe1+?
- 1...Kc1
- 2.Rd1#
- 1...Rxe1!
- 1...Kc1
- 1.Sxb4+?
- 1...Kc1
- 2.Sca2#
- 2.Rd1#
- 2.Qxe1#
- 1...Rxb4!
- 1...Kc1
- 1.Rbxb4+?
- 1...Kxc3
- 2.Rbc4#
- 1...Kd2!
- 1...Kxc3
- 1.Qxe1?
- threat
- 2.Rxb2#
- 2.Ra3#
- 2.Rbxb4#
- 1...Rxa5
- 2.Sxb4#
- 2.Rxb2#
- 1...Sxd3
- 2.Rbb4#
- 2.Rxb5#
- 1...Qd2
- 2.Ra3#
- 2.Qxb1#
- 1...Ra1
- 2.Rxb2#
- 2.Ra3#
- 1...Sa2
- 2.Rxb2#
- 2.Rbb4#
- 2.Rxb5#
- 1...Sd5
- 2.Rxb2#
- 2.Rbb4#
- 2.Rxb5#
- 1...Sa6
- 2.Rxb2#
- 2.Rbb4#
- 2.Rxb5#
- 1...Sc6
- 2.Rxb2#
- 2.Rbb4#
- 2.Rxb5#
- 1...Rxe1!
- threat
- 1.Qf4?
- threat
- 2.Ra3#
- 1...Rxa5
- 2.Sxb4#
- 1...Sbxd3
- 2.Rxb5#
- 1...Sa2
- 2.Rxb2#
- 2.Rxb5#
- 1...Sd5
- 2.Rxb2#
- 2.Rxb5#
- 1...Sa6
- 2.Rxb2#
- 2.Rxb5#
- 1...Sc6
- 2.Rxb2#
- 2.Rxb5#
- 1...Qxf4!
- threat
- 1.Sa2?
- Keys
- 1.Se2!
- threat
- 2.Rxb2#
- 1...Kd1
- 2.Sxb4#
- 1...Kd2
- 2.Sxe1#
- 1...Qxe2
- 2.Qxe2#
- 1...Sexd3
- 2.Rbxd3#
- 1...Sbxd3
- 2.Rxb5#
- threat
- 1.Se2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 9
- Sets
- Q(e);N_GUARD::QAR2(A)
- Q(e);SBLOCK::B(E)+R(B)
- Q(e);N_GUARD::QAR2(A),XQ(e)
- Q(e);N_GUARD::QAR(A),XQ(e)
- S(f);::B(E)+R(B),DCHECK,XP(c)
- Tries
- Try
- S(C);
- Threat
- B(E)+R(B),DCHECK,XP(c)
- Vars
- K(d);P-FLIGHT,P_SPINS(f)::R(F)+S(D),XS(b)
- S(b);OGATE,XS(D)::B(E)+R(B),XS(b)
- S(f);OGATE,XS(D)::B(E)+R(B),XR(g)
- Refutation
- K(d);P_SPINS(b),S_FLIGHT
- Try
- S(C);
- Threat
- DUALS(4)
- Vars
- S(f);XS(D)::B(E)+R(B),DCHECK
- R(a);::B(E)+R(B),DCHECK,XP(c)
- R(a);SBLOCK::B(E)+R(B),DCHECK,XP(c)
- Refutation
- K(d);P_SPINS(b),S_FLIGHT
- Try
- S(D);CHECK,XS(b)
- Vars
- K(d);P-FLIGHT::R1(F)
- Refutation
- R(a);XS(D)
- Try
- S(D);CHECK,XS(f)
- Refutation
- R(g);XS(D)
- Try
- R(B);CHECK,XS(f)
- Vars
- K(d);P-FLIGHT,XS(C)::B(G)+R(B),DCHECK
- Refutation
- K(d);P-FLIGHT
- Try
- Q(A);XS(b)
- Threat
- DUALS(3)
- Refutation
- R(a);XQ(A)
- Try
- Q(A);
- Threat
- B(E)+R(B)
- Vars
- R(g);N_GUARD,XB(G)::S(D),XS(f)
- S(f);OGATE,XS(D)::B(E)+R(B),XR(g)
- Refutation
- Q(e);XQ(A)
- Try
- Actual
- S(C);
- Threat
- B(E)+R(B),DCHECK,XP(c)
- Vars
- K(d);P_SPINS(b),S_FLIGHT::R(F)+S(D),XS(f)
- K(d);P-FLIGHT,P_SPINS(f)::R(F)+S(D),XS(b)
- Q(e);OGATE,XS(C)::QAR2(A),XQ(e)
- S(b);OGATE,XS(D)::B(E)+R(B),XS(b)
- S(f);OGATE,XS(D)::B(E)+R(B),XR(g)
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