MESON Chess Problem Database
Problem Display
PID: 81639 (8/5N1p/5ppQ/4N1pP/p4k2/R7/1p5n/1B2KnB1 w - - 0 1)
Caine, Walter Edmund
The Observer, 1953
(First published on Sun Dec 20 1953)
#2
8 + 9
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Sd2
- 2.Bxh2#
- 1...Se3
- 2.Bxh2#
- 1...Sg3
- 2.Be3#
- 1...Sf3+
- 2.Rxf3#
- 1...Sg4
- 2.Rf3#
- 1...fxe5
- 2.Qxg5#
- 1...f5
- 2.Qxg5#
- 1...gxh5
- 2.Qxf6#
- 1...Sd2
- Tries
- 1.Kd1?
- 1...fxe5
- 2.Qxg5#
- 1...gxh5
- 2.Qxf6#
- 1...Sf3
- 2.Rxf3#
- 1...Sd2
- 2.Bxh2#
- 1...Sg3
- 2.Be3#
- 1...Sg4
- 2.Rf3#
- 1...f5
- 2.Qxg5#
- 1...Se3+!
- 1...fxe5
- 1.Ke2?
- 1...fxe5
- 2.Qxg5#
- 1...gxh5
- 2.Qxf6#
- 1...Se3
- 2.Bxh2#
- 1...Sf3
- 2.Rxf3#
- 1...Sd2
- 2.Bxh2#
- 1...Sg4
- 2.Rf3#
- 1...f5
- 2.Qxg5#
- 1...Sg3+!
- 1...fxe5
- 1.Bf2?
- threat
- 2.Rxa4#
- 1...Sf3+
- 2.Rxf3#
- 1...fxe5
- 2.Qxg5#
- 1...Sd2
- 2.Bg3#
- 1...Sg3
- 2.Be3#
- 2.Bxg3#
- 1...Se3!
- threat
- 1.Bxh2+?
- 1...Sg3
- 2.Bxg3#
- 2.Rf3#
- 1...Sxh2!
- 1...Sg3
- 1.Rc3?
- 1...Sf3+
- 2.Rxf3#
- 1...fxe5
- 2.Qxg5#
- 1...gxh5
- 2.Qxf6#
- 1...Se3
- 2.Bxh2#
- 1...Sd2
- 2.Bxh2#
- 1...Sg3
- 2.Be3#
- 1...Sg4
- 2.Rf3#
- 1...f5
- 2.Qxg5#
- 1...a3!
- 1...Sf3+
- 1.Qxg6?
- threat
- 2.Qe4#
- 2.Qf5#
- 2.Qxf6#
- 1...Sf3+
- 2.Rxf3#
- 1...fxe5
- 2.Qe4#
- 2.Qf5#
- 2.Qxg5#
- 1...Se3
- 2.Bxh2#
- 1...Sd2
- 2.Bxh2#
- 2.Qf5#
- 2.Qxf6#
- 1...Sg3
- 2.Be3#
- 1...Sg4
- 2.Rf3#
- 2.Qe4#
- 2.Qf5#
- 1...f5
- 2.Qxf5#
- 2.Qxg5#
- 1...hxg6!
- threat
- 1.hxg6?
- 1...Sf3+
- 2.Rxf3#
- 1...fxe5
- 2.Qxg5#
- 1...Se3
- 2.Bxh2#
- 2.Qxh2#
- 1...Sd2
- 2.Bxh2#
- 2.Qxh2#
- 1...Sg3
- 2.Be3#
- 1...Sg4
- 2.Rf3#
- 1...f5
- 2.Qxg5#
- 1...hxg6!
- 1...Sf3+
- 1.Kd1?
- Keys
- 1.Qf8!
- threat
- 2.Qb4#
- 1...Sf3+
- 2.Rxf3#
- 1...fxe5
- 2.Sh6#
- 1...Se3
- 2.Bxh2#
- 1...Sd2
- 2.Bxh2#
- 1...Sg3
- 2.Be3#
- threat
- 1.Qf8!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- S(a);N_GUARD::B(C),XS(c)
- S(a);N_GUARD,SBLOCK::B(C)
- S(c);CHECK,N_GUARD::R1(D),XS(c)
- S(c);N_GUARD::R1(D)
- P(g);N_GUARD,XS(E)::QAB1(G),XP(f)
- P(g);N_GUARD::QAB1(G),XP(f)
- P(h);OGATE,XP(F)::QAR2(G),XP(g)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- P(g);N_GUARD,XS(E)::QAB1(G),XP(f)
- P(h);OGATE,XP(F)::QAR2(G),XP(g)
- S(c);N_GUARD::R1(D),XS(c)
- S(a);N_GUARD::B(C),XS(c)
- S(a);N_GUARD,SBLOCK::B(C)
- S(c);N_GUARD::R1(D)
- P(g);N_GUARD::QAB1(G),XP(f)
- Refutation
- S(a);CHECK
- Try
- K(B);P-FLIGHT
- Vars
- P(g);N_GUARD,XS(E)::QAB1(G),XP(f)
- P(h);OGATE,XP(F)::QAR2(G),XP(g)
- S(a);N_GUARD::B(C),XS(c)
- S(c);N_GUARD::R1(D),XS(c)
- S(c);N_GUARD::R1(D)
- P(g);N_GUARD::QAB1(G),XP(f)
- Refutation
- S(a);CHECK
- Try
- B(C);
- Threat
- R(D),XP(d)
- Vars
- S(c);CHECK,N_GUARD::R1(D),XS(c)
- P(g);N_GUARD,XS(E)::QAB1(G),XP(f)
- S(a);N_GUARD::B(C)
- Refutation
- S(a);
- Try
- B(C);CHECK,XS(c)
- Refutation
- S(a);XB(C)
- Try
- R(D);
- Vars
- S(c);CHECK,N_GUARD::R1(D),XS(c)
- P(g);N_GUARD,XS(E)::QAB1(G),XP(f)
- P(h);OGATE,XP(F)::QAR2(G),XP(g)
- S(a);N_GUARD::B(C),XS(c)
- S(a);N_GUARD,SBLOCK::B(C)
- S(c);N_GUARD::R1(D)
- P(g);N_GUARD::QAB1(G),XP(f)
- Refutation
- P(d);
- Try
- Q(G);N_PINP(f),XP(h)
- Threat
- DUALS(3)
- Vars
- S(c);CHECK,N_GUARD::R1(D),XS(c)
- S(a);N_GUARD::B(C),XS(c)
- S(a);N_GUARD,SBLOCK::B(C)
- Refutation
- P(i);XQ(G)
- Try
- P(F);XP(h)
- Vars
- S(c);CHECK,N_GUARD::R1(D),XS(c)
- P(g);N_GUARD,XS(E)::QAB1(G),XP(f)
- S(a);N_GUARD,SBLOCK::B(C)
- S(c);N_GUARD::R1(D)
- P(g);N_GUARD::QAB1(G),XP(f)
- Refutation
- P(i);XP(F)
- Try
- Actual
- Q(G);N_PINP(f)
- Threat
- QAR(G)
- Vars
- S(c);CHECK,N_GUARD::R1(D),XS(c)
- P(g);SBLOCK,XS(E)::QAR(G)+S(H)
- S(a);N_GUARD::B(C),XS(c)
- S(a);N_GUARD,SBLOCK::B(C)
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