MESON Chess Problem Database
Problem Display
PID: 224103 (2N5/1n6/2p1B3/2k5/K2NPp2/n3q3/1B6/b4Q2 w - - 0 1)
Pierce, James
English Mechanic and World of Science, 1877
(First published on Fri Jul 20 1877)
#2
7 + 7
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Sb3#
- 1...Qg1
- 2.Sb3#
- 1...Qd2
- 2.Sb3#
- 1...Qf2
- 2.Sb3#
- 1...Qe1
- 2.Sb3#
- 1...Qe2
- 2.Sb3#
- 1...Qb3+
- 2.Sxb3#
- 1...Sb1
- 2.Qc4#
- 1...Sc2
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sb5
- 2.Qc4#
- 1...Qc1
- Tries
- 1.Qd3?
- threat
- 2.Sb3#
- 2.Bxa3#
- 1...Qxd4+
- 2.Qxd4#
- 1...Qxe4
- 2.Bxa3#
- 2.Qxa3#
- 1...Bxb2
- 2.Sb3#
- 1...Qc1
- 2.Sb3#
- 2.Qxa3#
- 1...Qd2
- 2.Sb3#
- 1...Qe1
- 2.Sb3#
- 1...Sb1
- 2.Sb3#
- 2.Qc4#
- 1...Sc2
- 2.Sb3#
- 2.Qc4#
- 1...Sc4
- 2.Sb3#
- 2.Qxc4#
- 1...Sb5
- 2.Sb3#
- 2.Qc4#
- 1...Sa5
- 2.Bxa3#
- 1...Qxd3!
- threat
- 1.Qa6?
- threat
- 2.Qb6#
- 2.Qxc6#
- 2.Qa7#
- 1...Qb3+
- 2.Sxb3#
- 1...Qxe4
- 2.Qb6#
- 2.Qa7#
- 1...Bxb2
- 2.Qb6#
- 2.Qa7#
- 1...Qc3
- 2.Qb6#
- 2.Qa7#
- 1...Sc4
- 2.Qxc4#
- 2.Qxc6#
- 1...Sb5
- 2.Qb6#
- 2.Qxc6#
- 1...Sa5
- 2.Qb6#
- 2.Qa7#
- 1...Sd8
- 2.Qb6#
- 2.Qa7#
- 1...Qxd4+!
- threat
- 1.Qc1+?
- 1...Qxc1
- 2.Sb3#
- 1...Qc3
- 2.Sb3#
- 1...Sc4
- 2.Qxc4#
- 1...Sc2!
- 1...Qxc1
- 1.Qf2?
- threat
- 2.Sb3#
- 1...Qxd4+
- 2.Qxd4#
- 1...Qb3+
- 2.Sxb3#
- 1...Qxe4
- 2.Bxa3#
- 1...Sa5!
- threat
- 1.Qd3?
- Keys
- 1.Qg1!
- threat
- 2.Sb3#
- 2.Qg5#
- 1...Qxd4+
- 2.Qxd4#
- 1...Qb3+
- 2.Sxb3#
- 1...Qxg1
- 2.Sb3#
- 1...Qxe4
- 2.Bxa3#
- 1...Bxb2
- 2.Sb3#
- 1...Qc3
- 2.Sb3#
- 1...Qg3
- 2.Sb3#
- 1...Qh3
- 2.Sb3#
- 2.Sf3#
- 1...Sc4
- 2.Sb3#
- 1...Sa5
- 2.Qg5#
- 1...Sd6
- 2.Sb3#
- 1...f3
- 2.Sb3#
- threat
- 1.Qg1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 8
- REMOVED MATES = 8
- Sets
- Q(c);N_GUARD::S(D)
- Q(c);CHECK,N_GUARD::S(D),XQ(c)
- S(b);N_GUARD::QAR1(A)
- S(b);N_GUARD::QAR1(A),XS(b)
- Tries
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATE,XS(D)::QAB1(A),XQ(c)
- B(a);XB(B)::S(D)
- Q(c);::S(D)
- S(g);::B(B),XS(b)
- Refutation
- Q(c);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- Q(c);CHECK,N_GUARD::S(D),XQ(c)
- Refutation
- Q(c);CHECK,XS(D)
- Try
- Q(A);CHECK
- Vars
- Q(c);XQ(A)::S(D)
- Q(c);P_SPINQ(c)::S(D)
- S(b);N_GUARD,P_SPINS(b)::QAR1(A),XS(b)
- Refutation
- S(b);P_SPINS(b)
- Try
- Q(A);
- Threat
- S(D)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(D)::QAB1(A),XQ(c)
- Q(c);CHECK::QAB(A)+S(D),DCHECK,XQ(c)
- Q(c);N_GUARD,P_PINS(D),XP(E)::B(B),XS(b)
- Refutation
- S(g);
- Try
- Actual
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(D)::QAB1(A),XQ(c)
- Q(c);CHECK::QAB(A)+S(D),DCHECK,XQ(c)
- Q(c);XQ(A)::S(D)
- Q(c);N_GUARD,P_PINS(D),XP(E)::B(B),XS(b)
- B(a);XB(B)::S(D)
- Q(c);::QAB(A)+S(D),DCHECK
- S(b);::S(D)
- S(g);::QAR(A)
- S(g);::S(D)
- P(d);::S(D)
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