MESON Chess Problem Database
Problem Display
PID: 222633 (8/2pp4/3qp3/1R2p3/PpkpN3/2pN4/P4P2/K2Q4 w - - 0 1)
Mackay, Donald
English Mechanic and World of Science, 1883
(First published on Fri Apr 27 1883)
#2
8 + 9
| 6490 | yacpdb | 2020 |
| 15239 | Valois Notebooks | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qc5
- 2.Rxc5#
- 1...Qe7
- 2.Sxe5#
- 1...Qf8
- 2.Sxe5#
- 1...Qd5
- 2.Rxb4#
- 1...Qa6
- 2.Sxe5#
- 2.Rc5#
- 1...Qb6
- 2.Sxe5#
- 1...Qc6
- 2.Sxe5#
- 1...c2
- 2.Sb2#
- 2.Qxc2#
- 1...b3
- 2.axb3#
- 1...c6
- 2.Sxd6#
- 1...Qc5
- Tries
- 1.Kb1?
- 1...c2+
- 2.Qxc2#
- 1...Qc5
- 2.Rxc5#
- 1...Qe7
- 2.Sxe5#
- 1...Qf8
- 2.Sxe5#
- 1...Qd5
- 2.Rxb4#
- 1...Qa6
- 2.Sxe5#
- 2.Rc5#
- 1...Qb6
- 2.Sxe5#
- 1...Qc6
- 2.Sxe5#
- 1...b3
- 2.axb3#
- 1...c6
- 2.Sxd6#
- 1...c5!
- 1...c2+
- 1.Sc1?
- threat
- 2.Qb3#
- 2.Qd3#
- 1...Qc5
- 2.Rxc5#
- 2.Qb3#
- 1...c5
- 2.Qb3#
- 1...c2
- 2.Qxc2#
- 2.Qd3#
- 1...b3
- 2.Qxb3#
- 2.Qd3#
- 2.axb3#
- 1...d3!
- threat
- 1.Se1?
- threat
- 2.Qb3#
- 2.Qd3#
- 1...Qc5
- 2.Rxc5#
- 2.Qb3#
- 1...c5
- 2.Qb3#
- 1...c2
- 2.Qxc2#
- 2.Qd3#
- 1...b3
- 2.Qxb3#
- 2.Qd3#
- 2.axb3#
- 1...d3!
- threat
- 1.Sd2+?
- 1...cxd2
- 2.Qc2#
- 2.Qb3#
- 1...Kxd3!
- 1...cxd2
- 1.Qc2?
- threat
- 2.Sb2#
- 2.Sd2#
- 1...Qc5
- 2.Rxc5#
- 1...c5!
- threat
- 1.Qe2?
- threat
- 2.Sb2#
- 2.Sxe5#
- 1...Qc5
- 2.Rxc5#
- 1...c5!
- threat
- 1.Qb1?
- 1...Qc5
- 2.Rxc5#
- 1...c2
- 2.Sb2#
- 2.Qxc2#
- 2.Qb3#
- 1...Qe7
- 2.Sxe5#
- 1...Qf8
- 2.Sxe5#
- 1...Qd5
- 2.Rxb4#
- 1...Qa6
- 2.Sxe5#
- 2.Rc5#
- 1...Qb6
- 2.Sxe5#
- 1...Qc6
- 2.Sxe5#
- 1...b3
- 2.axb3#
- 1...c6
- 2.Sxd6#
- 1...c5!
- 1...Qc5
- 1.Qf1?
- threat
- 2.Sb2#
- 2.Sxe5#
- 1...Qc5
- 2.Rxc5#
- 1...c5!
- threat
- 1.Qd2?
- 1...cxd2
- 2.Sb2#
- 1...Qc5
- 2.Rxc5#
- 1...Qe7
- 2.Sxe5#
- 1...Qf8
- 2.Sxe5#
- 1...Qd5
- 2.Rxb4#
- 1...Qa6
- 2.Sxe5#
- 2.Rc5#
- 1...Qb6
- 2.Sxe5#
- 1...Qc6
- 2.Sxe5#
- 1...c2
- 2.Sb2#
- 2.Qxc2#
- 1...b3
- 2.axb3#
- 1...c6
- 2.Sxd6#
- 1...c5!
- 1...cxd2
- 1.f3?
- 1...Qc5
- 2.Rxc5#
- 1...Qe7
- 2.Sxe5#
- 1...Qf8
- 2.Sxe5#
- 1...Qd5
- 2.Rxb4#
- 1...Qa6
- 2.Sxe5#
- 2.Rc5#
- 1...Qb6
- 2.Sxe5#
- 1...Qc6
- 2.Sxe5#
- 1...c2
- 2.Sb2#
- 2.Qxc2#
- 1...b3
- 2.axb3#
- 1...c6
- 2.Sxd6#
- 1...c5!
- 1...Qc5
- 1.Kb1?
- Keys
- 1.Qf3!
- 1...Qc5
- 2.Rxc5#
- 1...c5
- 2.Sxd6#
- 1...Qe7
- 2.Sxe5#
- 1...Qf8
- 2.Sxe5#
- 1...Qd5
- 2.Rxb4#
- 1...Qa6
- 2.Sxe5#
- 2.Rc5#
- 1...Qb6
- 2.Sxe5#
- 1...Qc6
- 2.Sxe5#
- 1...c2
- 2.Sb2#
- 1...b3
- 2.axb3#
- 1...c6
- 2.Sxd6#
- 1...Qc5
- 1.Qf3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(f);N_GUARD::R1(H),XQ(f)
- Q(f);N_GUARD::S(E),XP(e)
- Q(f);N_GUARD,SBLOCK::R1(H),XP(b)
- P(b);OGATE::P(C),XP(b)
- P(h);N_GUARD::S(G),XQ(f)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- P(a);CHECK,OGATEB::QAR2(B),XP(a)
- Q(f);N_GUARD::R1(H),XQ(f)
- Q(f);N_GUARD::S(E),XP(e)
- Q(f);N_GUARD,SBLOCK::R1(H),XP(b)
- P(b);OGATE::P(C),XP(b)
- P(h);N_GUARD::S(G),XQ(f)
- Refutation
- P(h);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- P(h);::QAB1(B)
- Refutation
- P(d);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- P(h);::QAB1(B)
- Refutation
- P(d);
- Try
- S(G);CHECK
- Refutation
- K(c);S_FLIGHT,XS(E)
- Try
- Q(B);P_PINP(a)
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD::R1(H),XQ(f)
- Refutation
- P(h);
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD::R1(H),XQ(f)
- Refutation
- P(h);
- Try
- Q(B);
- Vars
- Q(f);N_GUARD::R1(H),XQ(f)
- Q(f);N_GUARD::S(E),XP(e)
- Q(f);N_GUARD,SBLOCK::R1(H),XP(b)
- P(b);OGATE::P(C),XP(b)
- P(h);N_GUARD::S(G),XQ(f)
- Refutation
- P(h);
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD::R1(H),XQ(f)
- Refutation
- P(h);
- Try
- Q(B);
- Vars
- P(a);N_GUARD,XQ(B)::S(E)
- Q(f);N_GUARD::R1(H),XQ(f)
- Q(f);N_GUARD::S(E),XP(e)
- Q(f);N_GUARD,SBLOCK::R1(H),XP(b)
- P(b);OGATE::P(C),XP(b)
- P(h);N_GUARD::S(G),XQ(f)
- Refutation
- P(h);
- Try
- P(D);
- Vars
- Q(f);N_GUARD::R1(H),XQ(f)
- Q(f);N_GUARD::S(E),XP(e)
- Q(f);N_GUARD,SBLOCK::R1(H),XP(b)
- P(b);OGATE::P(C),XP(b)
- P(h);N_GUARD::S(G),XQ(f)
- Refutation
- P(h);
- Try
- Actual
- Q(B);
- Vars
- Q(f);N_GUARD::R1(H),XQ(f)
- P(h);N_GUARD::S(G),XQ(f)
- Q(f);N_GUARD::S(E),XP(e)
- Q(f);N_GUARD,SBLOCK::R1(H),XP(b)
- P(a);N_GUARD::S(E)
- P(b);OGATE::P(C),XP(b)
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