MESON Chess Problem Database
Problem Display
PID: 74371 (2B2Rq1/4pbr1/2NN2p1/2pQ4/R3nk1P/6pp/K2n1PP1/8 w - - 0 1)
Cristoffanini, Guido
2nd Prize, L'Italia Scacchistica, 1928
#2
10 + 11
| 3713 | Snap | 2007 |
| 133 | The Problemist Supplement | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Sb1
- 2.Rxe4#
- 1...Sf1
- 2.Rxe4#
- 1...Sb3
- 2.Rxe4#
- 2.Qxe4#
- 2.Qe5#
- 2.Qg5#
- 1...Sf3
- 2.Rxe4#
- 1...Sc4
- 2.Qxe4#
- 1...c4
- 2.Qe5#
- 1...e6
- 2.Qg5#
- 1...Sb1
- Tries
- 1.Be6?
- threat
- 2.Qxd2#
- 2.Qe5#
- 2.Qg5#
- 1...gxf2
- 2.Qg5#
- 1...exd6
- 2.Qxd2#
- 2.Qg5#
- 2.Qxd6#
- 1...Sb1
- 2.Rxe4#
- 2.Qxe4#
- 2.Qe5#
- 2.Qg5#
- 1...Sf1
- 2.Rxe4#
- 2.Qxe4#
- 2.Qe5#
- 2.Qg5#
- 1...Sb3
- 2.Rxe4#
- 2.Qxe4#
- 2.Qe5#
- 2.Qg5#
- 1...Sf3
- 2.Rxe4#
- 2.Qxe4#
- 1...Sc4
- 2.Qxe4#
- 1...c4
- 2.Qe5#
- 1...g5
- 2.Qxd2#
- 2.Qe5#
- 2.Qf5#
- 1...hxg2!
- threat
- 1.Rc4?
- threat
- 2.Qxd2#
- 2.Qe5#
- 2.Qg5#
- 1...Sxc4
- 2.Qxe4#
- 1...gxf2
- 2.Qg5#
- 1...exd6
- 2.Qxd2#
- 2.Qg5#
- 2.Qxd6#
- 1...e6
- 2.Qg5#
- 1...Sb1
- 2.Rxe4#
- 2.Qxe4#
- 2.Qe5#
- 2.Qg5#
- 1...Sf1
- 2.Rxe4#
- 2.Qxe4#
- 2.Qe5#
- 2.Qg5#
- 1...Sb3
- 2.Rxe4#
- 2.Qxe4#
- 2.Qe5#
- 2.Qg5#
- 1...Sf3
- 2.Rxe4#
- 2.Qxe4#
- 1...g5
- 2.Qxd2#
- 2.Qe5#
- 2.Qf5#
- 1...e5
- 2.Qxd2#
- 2.Qxe5#
- 1...hxg2!
- threat
- 1.Rxf7+?
- 1...Rxf7
- 2.Qxd2#
- 2.Qe5#
- 2.Qg5#
- 1...Qxf7!
- 1...Rxf7
- 1.Be6?
- Keys
- 1.Qb3!
- threat
- 2.fxg3#
- 1...Sxb3
- 2.Rxe4#
- 1...gxf2
- 2.g3#
- 1...e6
- 2.Qxg3#
- 1...Sf1
- 2.Rxe4#
- 1...Sf3
- 2.Rxe4#
- 1...Sc4
- 2.Qf3#
- 1...c4
- 2.Qe3#
- threat
- 1.Qb3!
This anticipates 10259(1963)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- S(a);N_GUARD::R1(D),XS(d)
- S(a);N_PINQ(F),N_SPINS(d)::QAR1(F),XS(d)
- P(f);N_PINQ(F),N_SPINS(d)::QAB1(F)
- P(h);N_PINQ(F)::QAB1(F)
- Tries
- Try
- B(I);N_SPINQ(F)
- Threat
- DUALS(3)
- Vars
- P(b);XP(B)::QAB1(F)
- S(a);N_GUARD,N_SPINS(d)::QAR1(F),XS(d)
- P(f);N_SPINS(d)::QAB1(F)
- Refutation
- P(c);XP(C)
- Try
- R(D);N_SPINQ(F)
- Threat
- DUALS(3)
- Vars
- S(a);N_GUARD,N_SPINS(d),XR(D)::QAR1(F),XS(d)
- P(b);XP(B)::QAB1(F)
- P(h);::QAB1(F)
- Refutation
- P(c);XP(C)
- Try
- R(J);CHECK,N_SPINQ(F),XB(i)
- Refutation
- Q(k);P_PINQ(F),XR(J)
- Try
- Actual
- Q(F);
- Threat
- P(B),XP(b)
- Vars
- S(a);N_GUARD,XQ(F)::R1(D),XS(d)
- P(b);OGATE,XP(B)::P(C)
- P(h);N_PINQ(F)::QAB1(F),XP(b)
- S(a);N_GUARD::R1(D),XS(d)
- S(a);N_PINQ(F),N_SPINS(d)::QAR1(F)
- P(f);N_PINQ(F),N_SPINS(d)::QAB1(F)
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