MESON Chess Problem Database
Problem Display
PID: 152655 (QB6/8/pK4p1/5bP1/1N1k1n2/N1pPp1p1/7q/8 w - - 0 1)
Thomson, Robert Gavin
The Referee, 1928
(First published on Sun Jan 29 1928)
#2
7 + 9
| 15239 | Valois Notebooks | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Sac2#
- 1...Qh1
- 2.Sac2#
- 1...Qc2
- 2.Saxc2#
- 1...Qh3
- 2.Sac2#
- 1...Qh4
- 2.Sac2#
- 1...Qh5
- 2.Sac2#
- 1...Qh6
- 2.Sac2#
- 1...Qh7
- 2.Sac2#
- 1...Qh8
- 2.Sac2#
- 1...Bh3
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bg4
- 2.Qe4#
- 1...Be6
- 2.Qe4#
- 1...Bd7
- 2.Qe4#
- 1...Bc8
- 2.Qe4#
- 1...Se2
- 2.Sac2#
- 2.Qd5#
- 1...Sg2
- 2.Sac2#
- 2.Qd5#
- 1...Sxd3
- 2.Qd5#
- 1...Sh3
- 2.Qd5#
- 1...Sd5+
- 2.Qxd5#
- 1...Sh5
- 2.Qd5#
- 1...Se6
- 2.Qd5#
- 1...e2
- 2.Sac2#
- 1...g2
- 2.Sac2#
- 1...a5
- 2.Sb5#
- 1...Qg1
- Tries
- 1.Bxf4?
- threat
- 2.Qd5#
- 1...Qh1
- 2.Sac2#
- 1...Qa2
- 2.Qh8#
- 1...Qg2
- 2.Qh8#
- 1...Be4
- 2.Qxe4#
- 1...Be6
- 2.Qe4#
- 1...c2!
- threat
- 1.Qc6?
- threat
- 2.Qc4#
- 2.Qc5#
- 2.Qf6#
- 1...Sd5+
- 2.Qxd5#
- 1...Sxd3
- 2.Qd5#
- 2.Qc4#
- 1...e2
- 2.Sac2#
- 2.Qc5#
- 1...Qa2
- 2.Qc5#
- 2.Qf6#
- 1...Qh8
- 2.Sac2#
- 2.Qc4#
- 2.Qc5#
- 1...Be6
- 2.Qe4#
- 2.Qc5#
- 1...Sh5
- 2.Qd5#
- 2.Qc4#
- 2.Qc5#
- 2.Qd6#
- 1...Se6
- 2.Qd5#
- 2.Qd7#
- 2.Qc4#
- 2.Qd6#
- 1...Bxd3!
- threat
- 1.Qb7?
- threat
- 2.Qg7#
- 1...Sd5+
- 2.Qxd5#
- 1...Sxd3
- 2.Qd5#
- 1...e2
- 2.Sac2#
- 1...Qh6
- 2.Sac2#
- 1...Qh7
- 2.Sac2#
- 1...Qh8
- 2.Sac2#
- 1...Bd7
- 2.Qe4#
- 1...Sh5
- 2.Qd5#
- 1...Se6
- 2.Qd5#
- 2.Qd7#
- 1...Bxd3!
- threat
- 1.Bxf4?
- Keys
- 1.Qh1!
- 1...Sd5+
- 2.Qxd5#
- 1...Qxh1
- 2.Sac2#
- 1...Bxd3
- 2.Sc6#
- 1...Sxd3
- 2.Sc6#
- 2.Qd5#
- 1...c2
- 2.Qa1#
- 1...e2
- 2.Sac2#
- 1...Qg1
- 2.Sac2#
- 2.Qh8#
- 1...Qa2
- 2.Qh8#
- 1...Qb2
- 2.Qh8#
- 1...Qc2
- 2.Saxc2#
- 2.Qh8#
- 1...Qd2
- 2.Qh8#
- 1...Qe2
- 2.Qh8#
- 1...Qf2
- 2.Qh8#
- 1...Qg2
- 2.Qh8#
- 1...Qh3
- 2.Sac2#
- 1...Qh4
- 2.Sac2#
- 1...Qh5
- 2.Sac2#
- 1...Qh6
- 2.Sac2#
- 1...Qh7
- 2.Sac2#
- 1...Qh8
- 2.Sac2#
- 2.Qxh8#
- 1...Bh3
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bg4
- 2.Qe4#
- 1...Be6
- 2.Qe4#
- 1...Bd7
- 2.Qe4#
- 1...Bc8
- 2.Qe4#
- 1...Se2
- 2.Sac2#
- 2.Qd5#
- 1...Sg2
- 2.Sac2#
- 1...Sh3
- 2.Qd5#
- 1...Sh5
- 2.Qd5#
- 1...Se6
- 2.Qd5#
- 1...g2
- 2.Sac2#
- 1...a5
- 2.Sb5#
- 1...Sd5+
- 1.Qh1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 4
- Sets
- Q(a);N_GUARD::S(A)
- Q(a);N_GUARD::S(A),XQ(a)
- B(g);N_GUARD::QAR1(F)
- B(g);N_GUARD::QAR1(F),XB(g)
- S(f);N_GUARD,XP(B)::QAR1(F)
- S(f);N_GUARD::QAR1(F)
- S(f);CHECK,N_GUARD::QAR1(F),XS(f)
- P(c);S_CUTQ(a)::S(A)
- P(d);S_CUTQ(a)::S(A)
- P(h);N_GUARD::S(A)
- Tries
- Try
- B(G);XS(f)
- Threat
- QAR1(F)
- Vars
- Q(a);N_GUARD::S(A)
- Q(a);N_GUARD::QAB(F)
- B(g);N_GUARD::QAR1(F),XB(g)
- B(g);N_GUARD::QAR1(F)
- Refutation
- P(b);
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- S(f);CHECK,N_GUARD::QAR1(F),XS(f)
- Refutation
- B(g);XP(B)
- Try
- Q(F);
- Threat
- QAB(F)
- Vars
- S(f);CHECK,N_GUARD::QAR1(F),XS(f)
- S(f);N_GUARD,XP(B)::QAR1(F)
- P(c);S_CUTQ(a)::S(A)
- Q(a);N_GUARD::S(A)
- B(g);N_GUARD::QAR1(F)
- S(f);N_GUARD::QAR1(F)
- Refutation
- B(g);XP(B)
- Try
- Actual
- Q(F);
- Vars
- S(f);CHECK,N_GUARD::QAR1(F),XS(f)
- Q(a);N_GUARD,XQ(F)::S(A)
- B(g);SBLOCK,XP(B)::S(C)
- P(b);OGATEB::QAB(F)
- P(c);S_CUTQ(a)::S(A)
- Q(a);OGATE::QAB(F)
- Q(a);OGATE,P_PINS(C)::QAB(F)
- Q(a);N_GUARD::S(A)
- B(g);N_GUARD::QAR1(F)
- B(g);N_GUARD::QAR1(F),XB(g)
- S(f);S_CUTQ(a)::S(A)
- S(f);N_GUARD::QAR1(F)
- P(d);S_CUTQ(a)::S(A)
- P(h);N_GUARD::S(A)
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