MESON Chess Problem Database
Problem Display
PID: 135275 (7K/BPr1N3/5p2/3N1Q2/Bpk5/p6R/qn1pn3/bRr4b w - - 0 1)
Matthews, Robin CO
1st Comm., L'Italia Scacchistica, 1953
#2
9 + 12
| 14609 | Mostly Three=Movers | 1995 |
SOLUTION
- SOUND
- Sets
- 1...Rc8+
- 2.Qxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Bxd5
- 2.Qxd5#
- 1...Sd1
- 2.Rxb4#
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sxa4
- 2.Rxb4#
- 2.Qd3#
- 1...Sc3
- 2.Se3#
- 1...Sd4
- 2.Sb6#
- 1...Rc8+
- Tries
- 1.Bb3+?
- 1...Kb5
- 2.Sxc7#
- 1...Qxb3!
- 1...Kb5
- 1.Rb3?
- threat
- 2.Se3#
- 2.Rxb4#
- 1...Rc8+
- 2.Qxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Rxb7
- 2.Se3#
- 1...Rxe7
- 2.Rxb4#
- 1...Bxd5
- 2.Qxd5#
- 1...Rc5
- 2.Rxb4#
- 1...d1S
- 2.Rxb4#
- 1...Rc3
- 2.Rxb4#
- 1...Be4
- 2.Se3#
- 1...Sd1
- 2.Rxb4#
- 2.Qd3#
- 1...Sd3
- 2.Se3#
- 2.Qxd3#
- 1...Qxb3!
- threat
- 1.Qc2+?
- 1...Sc3
- 2.Se3#
- 1...Rxc2!
- 1...Sc3
- 1.Qe4+?
- 1...Sd4
- 2.Qxd4#
- 1...Bxe4!
- 1...Sd4
- 1.Qf4+?
- 1...Be4
- 2.Qxc7#
- 1...Sd4
- 2.Qxd4#
- 1...Sxf4!
- 1...Be4
- 1.b8Q?
- threat
- 2.Bb5#
- 2.Qxc7#
- 2.Qxb4#
- 2.Qb5#
- 1...Rc8+
- 2.Qfxc8#
- 2.Qbxc8#
- 1...Rxa7
- 2.Qxb4#
- 1...Rxe7
- 2.Bb5#
- 2.Qxb4#
- 2.Qb5#
- 1...Bxd5
- 2.Bb5#
- 2.Qxd5#
- 2.Qb5#
- 1...Sxa4
- 2.Rxb4#
- 2.Qd3#
- 2.Qxb4#
- 1...Rc5
- 2.Qxb4#
- 1...Qb3
- 2.Bxb3#
- 2.Bb5#
- 2.Qxc7#
- 2.Qb5#
- 1...Rc3
- 2.Qxc7#
- 2.Qxb4#
- 2.Qb5#
- 1...Rc6
- 2.Bb5#
- 2.Qxb4#
- 2.Qb5#
- 1...Rd7
- 2.Bb5#
- 2.Qxb4#
- 2.Qb5#
- 1...Bf3
- 2.Qxc7#
- 2.Qxb4#
- 2.Qb5#
- 1...Sd3
- 2.Bb5#
- 2.Qxd3#
- 2.Qb5#
- 1...Sc3
- 2.Se3#
- 2.Qxc7#
- 2.Qxb4#
- 1...Sg3
- 2.Qxc7#
- 2.Qxb4#
- 2.Qb5#
- 1...Sd4
- 2.Sb6#
- 2.Qxb4#
- 1...b3
- 2.Bb5#
- 2.Qxc7#
- 2.Qb4#
- 2.Qb5#
- 1...Rb7!
- threat
- 1.Bb3+?
- Keys
- 1.Qxf6!
- threat
- 2.Qa6#
- 1...Rc8+
- 2.bxc8Q#
- 2.bxc8R#
- 1...Rxb7
- 2.Qc6#
- 1...Rxe7
- 2.Qc6#
- 1...Sxa4
- 2.Rxb4#
- 1...Rc5
- 2.Sb6#
- 1...Rc6
- 2.Qxc6#
- 1...Sd1
- 2.Rxb4#
- 1...Sd3
- 2.Se3#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- threat
- 1.Qxf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 6
- REMOVED MATES = 1
- Sets
- B(c);OGATE,XS(D)::QAB1(E),XB(c)
- S(e);N_GUARD::QAB1(E),XS(e)
- S(g);SBLOCK::S(D)
- Tries
- Try
- B(C);CHECK
- Vars
- K(j);S_FLIGHT::QAR(E)+S(D),DCHECK,XR(l)
- Refutation
- Q(d);XB(C)
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- R(l);XP(G)::S(D)
- R(l);XS(H)::R1(B),XP(i)
- B(c);OGATE,XS(D)::QAB1(E),XB(c)
- R(l);::R1(B),XP(i)
- P(f);::R1(B),XP(i)
- R(b);::R1(B),XP(i)
- B(c);::S(D)
- Refutation
- Q(d);XR(B)
- Try
- Q(E);CHECK
- Vars
- S(g);P_SPINS(g)::S(D)
- Refutation
- R(b);XQ(E)
- Try
- Q(E);CHECK
- Vars
- S(g);N_GUARD,P_SPINS(g)::QAR1(E),XS(g)
- Refutation
- B(c);XQ(E)
- Try
- Q(E);CHECK
- Vars
- B(c);P_SPINB(c)::QAR(E),XR(l)
- S(g);N_GUARD,P_SPINS(g)::QAR1(E),XS(g)
- Refutation
- S(g);XQ(E)
- Try
- P(G);
- Threat
- DUALS(4)
- Vars
- R(l);XB(F)::QAR1(G),XP(i)
- R(l);::QAR1(G),XP(i)
- Refutation
- R(l);
- Try
- Actual
- Q(E);XP(k)
- Threat
- QAB(E)
- Vars
- R(l);CHECK,OGATE::PXR(l)=Q
- R(l);N_GUARD,XP(G)::QAR2(E)
- R(l);N_GUARD,XS(H)::QAR2(E)
- S(e);OGATE,P_PINQ(E),XB(C)::R1(A),XP(i)
- R(l);SBLOCK::S(D)
- R(l);N_GUARD::QAR2(E),XR(l)
- S(e);OGATE,P_PINQ(E)::R1(A),XP(i)
- S(e);P_PINQ(E),SBLOCK::S(D)
- S(g);N_GUARD::QAR1(E)
- S(g);N_GUARD::QAR1(E),XS(g)
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