MESON Chess Problem Database
Problem Display
PID: 186043 (8/8/3N1n1B/1B6/3p1Nkp/K2Q2r1/6R1/3b4 w - - 0 1)
Allison, Christopher John
2nd Prize, Chess, 1958
#2
7 + 6
| 81 | Chess | 1959 |
SOLUTION
- SOUND
- Sets
- 1...Rxg2
- 2.Qh3#
- 1...Bb3
- 2.Qe2#
- 1...Bf3
- 2.Qf5#
- 2.Qg6#
- 1...Se4
- 2.Bd7#
- 1...Sd5
- 2.Bd7#
- 1...Sh5
- 2.Bd7#
- 1...Sd7
- 2.Bxd7#
- 1...Sh7
- 2.Bd7#
- 1...Se8
- 2.Bd7#
- 1...Sg8
- 2.Bd7#
- 1...h3
- 2.Qxg3#
- 1...Rxg2
- Tries
- 1.Kb2?
- threat
- 2.Qxd1#
- 1...h3
- 2.Qxg3#
- 1...Bc2
- 2.Qe2#
- 1...Be2
- 2.Qxe2#
- 1...Bb3
- 2.Qe2#
- 1...Bf3
- 2.Qf5#
- 2.Qg6#
- 1...Ba4
- 2.Qe2#
- 1...Rxg2+!
- threat
- 1.Kb4?
- threat
- 2.Qxd1#
- 1...Rxg2
- 2.Qh3#
- 1...h3
- 2.Qxg3#
- 1...Bc2
- 2.Qe2#
- 1...Be2
- 2.Qxe2#
- 1...Bb3
- 2.Qe2#
- 1...Bf3
- 2.Qf5#
- 2.Qg6#
- 1...Ba4
- 2.Qe2#
- 1...Sd5+!
- threat
- 1.Sc4?
- threat
- 2.Se5#
- 1...Se4
- 2.Bd7#
- 1...Sd7
- 2.Bxd7#
- 1...h3!
- threat
- 1.Sf7?
- threat
- 2.Se5#
- 1...Se4
- 2.Bd7#
- 1...Sd7
- 2.Bxd7#
- 1...h3!
- threat
- 1.Se8?
- threat
- 2.Sxf6#
- 1...Sxe8
- 2.Bd7#
- 1...Se4
- 2.Bd7#
- 1...Sd5
- 2.Bd7#
- 1...Sh5
- 2.Bd7#
- 1...Sd7
- 2.Bxd7#
- 1...Sh7
- 2.Bd7#
- 1...Sg8
- 2.Bd7#
- 1...h3!
- threat
- 1.Bc4?
- threat
- 2.Be6#
- 1...h3
- 2.Qxg3#
- 1...Bb3
- 2.Qe2#
- 1...Sd5!
- threat
- 1.Bc6?
- 1...Rxg2
- 2.Qg6#
- 2.Qh3#
- 1...h3
- 2.Qxg3#
- 1...Bc2
- 2.Bf3#
- 2.Qf3#
- 1...Bb3
- 2.Bf3#
- 2.Qe2#
- 2.Qf5#
- 2.Qg6#
- 2.Qf3#
- 1...Bf3
- 2.Bxf3#
- 2.Qf5#
- 2.Qg6#
- 2.Qxf3#
- 1...Ba4
- 2.Bf3#
- 2.Qf3#
- 1...Se4
- 2.Bd7#
- 1...Sd5
- 2.Bd7#
- 1...Sh5
- 2.Bd7#
- 1...Sd7
- 2.Bxd7#
- 1...Sh7
- 2.Bd7#
- 1...Se8
- 2.Bd7#
- 1...Sg8
- 2.Bd7#
- 1...Be2!
- 1...Rxg2
- 1.Kb2?
- Keys
- 1.Qb3!
- 1...Rxg2
- 2.Qh3#
- 1...Bxb3
- 2.Be2#
- 1...d3
- 2.Qxd1#
- 1...h3
- 2.Qxg3#
- 1...Bc2
- 2.Be2#
- 1...Be2
- 2.Bxe2#
- 1...Bf3
- 2.Qe6#
- 1...Se4
- 2.Bd7#
- 1...Sd5
- 2.Bd7#
- 1...Sh5
- 2.Bd7#
- 1...Sd7
- 2.Bxd7#
- 1...Sh7
- 2.Bd7#
- 1...Se8
- 2.Bd7#
- 1...Sg8
- 2.Bd7#
- 1...Rxg2
- 1.Qb3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- R(b);N_PINQ(C),N_SPINR(b),XR(A)::QAB1(C)
- B(a);N_PINQ(C)::QAB(C)
- S(f);N_GUARD::B(E)
- S(f);N_GUARD::B(E),XS(f)
- P(e);N_GUARD::QAR1(C),XR(b)
- Tries
- Try
- K(B);N_SPINQ(C),S_FLIGHT
- Threat
- QAB(C),XB(a)
- Vars
- P(e);N_GUARD::QAR1(C),XR(b)
- B(a);N_GUARD::QAB(C)
- B(a);N_GUARD::QAB(C),XB(a)
- Refutation
- R(b);CHECK,N_SPINR(b),XR(A)
- Try
- K(B);N_SPINQ(C),S_FLIGHT
- Threat
- QAB(C),XB(a)
- Vars
- R(b);N_SPINR(b),OGATE,XR(A)::QAB1(C)
- P(e);N_GUARD::QAR1(C),XR(b)
- B(a);N_GUARD::QAB(C)
- B(a);N_GUARD::QAB(C),XB(a)
- Refutation
- S(f);CHECK
- Try
- S(F);
- Threat
- S(F)
- Vars
- S(f);N_GUARD::B(E)
- S(f);N_GUARD::B(E),XS(f)
- Refutation
- P(e);
- Try
- S(F);
- Threat
- S(F)
- Vars
- S(f);N_GUARD::B(E)
- S(f);N_GUARD::B(E),XS(f)
- Refutation
- P(e);
- Try
- S(F);
- Threat
- S(F),XS(f)
- Vars
- S(f);N_GUARD,XS(F)::B(E)
- S(f);N_GUARD::B(E)
- S(f);N_GUARD::B(E),XS(f)
- Refutation
- P(e);
- Try
- B(E);
- Threat
- B(E)
- Vars
- P(e);N_GUARD::QAR1(C),XR(b)
- B(a);N_PINQ(C)::QAB(C)
- Refutation
- S(f);
- Try
- B(E);
- Vars
- P(e);N_GUARD::QAR1(C),XR(b)
- S(f);N_GUARD::B(E)
- S(f);N_GUARD::B(E),XS(f)
- Refutation
- B(a);
- Try
- Actual
- Q(C);
- Vars
- R(b);N_PINQ(C),N_SPINR(b),XR(A)::QAB1(C)
- B(a);N_GUARD,XQ(C)::B(E)
- P(c);N_PINQ(C)::QAB(C),XB(a)
- P(e);N_GUARD::QAR1(C),XR(b)
- B(a);N_GUARD::B(E)
- B(a);N_GUARD::B(E),XB(a)
- B(a);N_PINQ(C),SBLOCK::QAB(C)
- S(f);N_GUARD::B(E)
- S(f);N_GUARD::B(E),XS(f)
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