MESON Chess Problem Database
Problem Display
PID: 40768 (4nn2/ppp5/qN3p2/2k4P/7R/P2p4/3P1PBQ/NR4BK w - - 0 1)
Blake, Percy Francis
HM., The House, 1898
#2
12 + 9
| 56 | The Problemist | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Qc4
- 2.Rxc4#
- 1...Qxa3
- 2.Rc4#
- 1...Qa4
- 2.Sxa4#
- 1...Qa5
- 2.Rc4#
- 1...Sd6
- 2.f4#
- 1...Sg7
- 2.Qxc7#
- 1...Se6
- 2.Sd7#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...f5
- 2.Qe5#
- 1...c6
- 2.f3#
- 1...Qc4
- Tries
- 1.Sb3+?
- 1...Kb5
- 2.Rb4#
- 1...Kxb6!
- 1...Kb5
- 1.Bxb7?
- threat
- 2.f3#
- 1...Qc4
- 2.Rxc4#
- 1...Qa4
- 2.Sxa4#
- 1...Se6
- 2.Sd7#
- 1...Qxb7+!
- threat
- 1.Rbb4?
- threat
- 2.Sb3#
- 1...Qxa3
- 2.Rhc4#
- 1...Qc4
- 2.Sa4#
- 2.Rhxc4#
- 1...Qa4
- 2.Sxa4#
- 2.Rhc4#
- 1...Qb5!
- threat
- 1.Rhb4?
- threat
- 2.Sb3#
- 1...Qxa3
- 2.Rc4#
- 1...Qc4
- 2.Rxc4#
- 1...Qa4
- 2.Sxa4#
- 1...Qb5!
- threat
- 1.Qf4?
- threat
- 2.Qb4#
- 2.Qd4#
- 1...Qxa3
- 2.Qd4#
- 1...Qxb6
- 2.Qd4#
- 1...Qb5
- 2.Qd4#
- 1...Qa4
- 2.Sxa4#
- 1...Qa5
- 2.Qd4#
- 1...Se6
- 2.Sd7#
- 2.Qb4#
- 1...Qc4!
- threat
- 1.Qd6+?
- 1...Sxd6
- 2.f4#
- 1...cxd6
- 2.f4#
- 1...Kxd6!
- 1...Sxd6
- 1.Sb3+?
- Keys
- 1.a4!
- 1...Qxa4
- 2.Sxa4#
- 1...Qxb6
- 2.Rc1#
- 1...axb6
- 2.Sb3#
- 1...cxb6
- 2.Sb3#
- 1...Qb5
- 2.Rxb5#
- 1...Qc4
- 2.Rxc4#
- 1...Qa5
- 2.Rc4#
- 1...Sd6
- 2.f4#
- 1...Sg7
- 2.Qxc7#
- 1...Se6
- 2.Sd7#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...f5
- 2.Qe5#
- 1...c6
- 2.f3#
- 1...Qxa4
- 1.a4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- Q(c);N_GUARD::R1(J),XQ(c)
- Q(c);N_GUARD,XP(I)::R1(J)
- Q(c);N_GUARD::S(L),XQ(c)
- Q(c);N_GUARD::R1(J)
- S(h);SBLOCK::B(C)+P(F)
- S(h);N_GUARD::QAR2(H),XP(g)
- S(i);N_GUARD::S(L)
- S(i);N_GUARD::S(L),XS(i)
- P(d);N_GUARD::QAR2(H)
- P(g);SBLOCK::B(C)+P(F)
- Tries
- Try
- S(A);CHECK
- Vars
- K(b);P-FLIGHT::R1(J)
- Refutation
- K(b);S_FLIGHT,XS(L)
- Try
- B(G);XP(f)
- Threat
- B(C)+P(F)
- Vars
- Q(c);N_GUARD::R1(J),XQ(c)
- Q(c);N_GUARD::S(L),XQ(c)
- S(i);N_GUARD::S(L)
- Refutation
- Q(c);CHECK,XB(G)
- Try
- R(B);
- Threat
- S(A)
- Vars
- Q(c);N_GUARD,XP(I)::R1(J)
- Refutation
- Q(c);
- Try
- R(J);
- Threat
- S(A)
- Vars
- Q(c);N_GUARD,XP(I)::R1(J)
- Q(c);N_GUARD::R1(J),XQ(c)
- Q(c);N_GUARD::S(L),XQ(c)
- Refutation
- Q(c);
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- Q(c);XP(I)::QAB1(H)
- Q(c);XS(L)::QAB1(H)
- Q(c);::QAB1(H)
- Q(c);N_GUARD::S(L),XQ(c)
- Refutation
- Q(c);
- Try
- Q(H);CHECK
- Vars
- S(h);SBLOCK,XQ(H)::B(C)+P(F)
- P(g);SBLOCK,XQ(H)::B(C)+P(F)
- Refutation
- K(b);S_FLIGHT,XQ(H)
- Try
- Actual
- P(I);
- Vars
- Q(c);XP(I)::S(L),XQ(c)
- Q(c);N_GUARD,SBLOCK,XS(L)::R(B)
- P(e);SBLOCK,XS(L)::S(A)
- P(g);SBLOCK,XS(L)::S(A)
- Q(c);N_GUARD::R1(B),XQ(c)
- Q(c);N_GUARD::R1(J),XQ(c)
- Q(c);N_GUARD::R1(J)
- S(h);SBLOCK::B(C)+P(F)
- S(h);N_GUARD::QAR2(H),XP(g)
- S(i);N_GUARD::S(L)
- S(i);N_GUARD::S(L),XS(i)
- P(d);N_GUARD::QAR2(H)
- P(g);SBLOCK::B(C)+P(F)
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