MESON Chess Problem Database
Problem Display
PID: 207640 (K2n4/3P4/Np1R2p1/2p3P1/Ppk3B1/2p2p1p/P1R2QbP/1N2b3 w - - 0 1)
Walton, FW
The Observer, 1954
(First published on Sun May 9 1954)
#2
12 + 11
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Bd2
- 2.Sxd2#
- 1...Bxf2
- 2.Sd2#
- 1...Bf1
- 2.Qxf1#
- 1...Bh1
- 2.Qf1#
- 1...Sc6
- 2.Be6#
- 1...Se6
- 2.Bxe6#
- 1...Sb7
- 2.Be6#
- 1...Sf7
- 2.Be6#
- 1...b3
- 2.Sa3#
- 1...b5
- 2.Qxc5#
- 1...Bd2
- Tries
- 1.Ka7?
- 1...Bxf2
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 1...Bf1
- 2.Qxf1#
- 1...Bh1
- 2.Qf1#
- 1...Se6
- 2.Bxe6#
- 1...Sb7
- 2.Be6#
- 1...Sf7
- 2.Be6#
- 1...b3
- 2.Sa3#
- 1...b5
- 2.Qxc5#
- 1...Sc6+!
- 1...Bxf2
- 1.Kb8?
- 1...Bxf2
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 1...Bf1
- 2.Qxf1#
- 1...Bh1
- 2.Qf1#
- 1...Se6
- 2.Bxe6#
- 1...Sb7
- 2.Be6#
- 1...Sf7
- 2.Be6#
- 1...b3
- 2.Sa3#
- 1...b5
- 2.Qxc5#
- 1...Sc6+!
- 1...Bxf2
- 1.Bxf3?
- threat
- 2.Qe2#
- 1...Bxf2
- 2.Sd2#
- 1...Bf1
- 2.Qxf1#
- 1...Bxf3+!
- threat
- 1.Bxh3?
- 1...Bxf2
- 2.Sd2#
- 1...b5
- 2.Qxc5#
- 1...Bd2
- 2.Sxd2#
- 1...Bf1
- 2.Bxf1#
- 2.Qxf1#
- 1...Bh1
- 2.Bf1#
- 2.Qf1#
- 1...Sc6
- 2.Be6#
- 1...Se6
- 2.Bxe6#
- 1...Sb7
- 2.Be6#
- 1...Sf7
- 2.Be6#
- 1...b3
- 2.Sa3#
- 1...Bxh3!
- 1...Bxf2
- 1.Bf5?
- threat
- 2.Bd3#
- 1...Bf1
- 2.Qxf1#
- 1...gxf5!
- threat
- 1.Rc1?
- 1...Bxf2
- 2.Sd2#
- 1...b5
- 2.Qxc5#
- 1...Bd2
- 2.Sxd2#
- 1...Bf1
- 2.Qxf1#
- 1...Bh1
- 2.Qf1#
- 1...Sc6
- 2.Be6#
- 1...Se6
- 2.Bxe6#
- 1...Sb7
- 2.Be6#
- 1...Sf7
- 2.Be6#
- 1...b3
- 2.Sa3#
- 1...c2!
- 1...Bxf2
- 1.Rxc3+?
- 1...bxc3
- 2.Sa3#
- 1...Bxc3!
- 1...bxc3
- 1.Qxe1?
- threat
- 2.Sd2#
- 2.Qe4#
- 1...Sc6
- 2.Sd2#
- 2.Be6#
- 2.Qe6#
- 1...Se6
- 2.Sd2#
- 2.Bxe6#
- 2.Qxe6#
- 1...f2+!
- threat
- 1.Qg1?
- 1...b5
- 2.Qxc5#
- 1...Bd2
- 2.Sxd2#
- 1...Bf2
- 2.Sd2#
- 1...Bg3
- 2.Sd2#
- 1...Bh4
- 2.Sd2#
- 1...Bf1
- 2.Qxf1#
- 1...Bh1
- 2.Qf1#
- 1...Sc6
- 2.Be6#
- 1...Se6
- 2.Bxe6#
- 1...Sb7
- 2.Be6#
- 1...Sf7
- 2.Be6#
- 1...b3
- 2.Sa3#
- 1...f2+!
- 1...b5
- 1.Qe3?
- threat
- 2.Qf4#
- 2.Qd3#
- 2.Qe4#
- 1...Bd2
- 2.Sxd2#
- 2.Qd3#
- 2.Qe4#
- 1...Bf2
- 2.Sd2#
- 2.Qd3#
- 1...Bg3
- 2.Sd2#
- 2.Qd3#
- 2.Qe4#
- 1...Bf1
- 2.Qf4#
- 2.Qe4#
- 1...Sc6
- 2.Be6#
- 2.Qd3#
- 2.Qe6#
- 1...Se6
- 2.Bxe6#
- 2.Qd3#
- 2.Qxe6#
- 1...f2+!
- threat
- 1.Qg3?
- threat
- 2.Qf4#
- 1...Bxg3
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 1...Bf2
- 2.Sd2#
- 1...Sc6
- 2.Be6#
- 1...Se6
- 2.Bxe6#
- 1...f2+!
- threat
- 1.Qd2?
- threat
- 2.Qf4#
- 2.Qd3#
- 2.Qd5#
- 1...Bxd2
- 2.Sxd2#
- 1...Bf2
- 2.Qd3#
- 2.Qd5#
- 1...Bg3
- 2.Qd3#
- 2.Qd5#
- 1...Bf1
- 2.Qf4#
- 2.Qd5#
- 1...Sc6
- 2.Be6#
- 2.Qd3#
- 2.Qd5#
- 1...Se6
- 2.Bxe6#
- 2.Qd3#
- 2.Qd5#
- 1...f2+!
- threat
- 1.Qxg2?
- threat
- 2.Qf1#
- 1...fxg2
- 2.Be2#
- 1...hxg2!
- threat
- 1.Ka7?
- Keys
- 1.Qh4!
- threat
- 2.Be6#
- 1...f2+
- 2.Bf3#
- 1...Bxh4
- 2.Sd2#
- 1...Se6
- 2.Bxe6#
- threat
- 1.Qh4!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- B(a);N_GUARD::S(A),XB(a)
- B(a);N_GUARD,XQ(D)::S(A)
- B(b);N_GUARD::QAB(D),XB(b)
- B(b);N_GUARD::QAB(D)
- S(k);N_GUARD::B(G)
- S(k);N_GUARD::B(G),XS(k)
- P(f);N_GUARD::S(A)
- P(i);N_GUARD::QAR1(D),XP(h)
- Tries
- Try
- K(L);P-FLIGHT
- Vars
- B(a);N_GUARD,XQ(D)::S(A)
- B(a);N_GUARD::S(A),XB(a)
- B(b);N_GUARD::QAB(D),XB(b)
- B(b);N_GUARD::QAB(D)
- S(k);N_GUARD::B(G),XS(k)
- S(k);N_GUARD::B(G)
- P(f);N_GUARD::S(A)
- P(i);N_GUARD::QAR1(D),XP(h)
- Refutation
- S(k);CHECK
- Try
- K(L);P-FLIGHT
- Vars
- B(a);N_GUARD,XQ(D)::S(A)
- B(a);N_GUARD::S(A),XB(a)
- B(b);N_GUARD::QAB(D),XB(b)
- B(b);N_GUARD::QAB(D)
- S(k);N_GUARD::B(G),XS(k)
- S(k);N_GUARD::B(G)
- P(f);N_GUARD::S(A)
- P(i);N_GUARD::QAR1(D),XP(h)
- Refutation
- S(k);CHECK
- Try
- B(G);P_SPINB(G),XP(d)
- Threat
- QAB(D)
- Vars
- B(a);N_GUARD,XQ(D)::S(A)
- B(b);N_GUARD,N_PINB(G)::QAB(D),XB(b)
- Refutation
- B(b);CHECK,XB(G)
- Try
- B(G);XP(e)
- Vars
- B(a);N_GUARD,XQ(D)::S(A)
- P(i);N_GUARD::QAR1(D),XP(h)
- B(a);N_GUARD::S(A),XB(a)
- S(k);N_GUARD::B(G)
- S(k);N_GUARD::B(G),XS(k)
- P(f);N_GUARD::S(A)
- Refutation
- B(b);XB(G)
- Try
- B(G);
- Threat
- B(G)
- Vars
- B(b);N_GUARD::QAB(D),XB(b)
- Refutation
- P(j);XB(G)
- Try
- R(C);
- Vars
- B(a);N_GUARD,XQ(D)::S(A)
- P(i);N_GUARD::QAR1(D),XP(h)
- B(a);N_GUARD::S(A),XB(a)
- B(b);N_GUARD::QAB(D),XB(b)
- B(b);N_GUARD::QAB(D)
- S(k);N_GUARD::B(G)
- S(k);N_GUARD::B(G),XS(k)
- P(f);N_GUARD::S(A)
- Refutation
- P(c);
- Try
- R(C);CHECK,XP(c)
- Vars
- P(f);SBLOCK,XR(C)::S(A)
- Refutation
- B(a);XR(C)
- Try
- Q(D);XB(a)
- Threat
- DUALS(2)
- Refutation
- P(d);CHECK
- Try
- Q(D);
- Vars
- P(i);N_GUARD::QAR1(D),XP(h)
- B(a);N_GUARD::S(A),XB(a)
- B(a);N_GUARD::S(A)
- B(b);N_GUARD::QAB(D),XB(b)
- B(b);N_GUARD::QAB(D)
- S(k);N_GUARD::B(G)
- S(k);N_GUARD::B(G),XS(k)
- P(f);N_GUARD::S(A)
- Refutation
- P(d);CHECK
- Try
- Q(D);
- Threat
- DUALS(3)
- Refutation
- P(d);CHECK
- Try
- Q(D);
- Threat
- QAR(D)
- Vars
- B(a);N_GUARD,XQ(D)::S(A)
- B(a);N_GUARD::S(A),XB(a)
- B(a);N_GUARD::S(A)
- S(k);N_GUARD::B(G)
- S(k);N_GUARD::B(G),XS(k)
- Refutation
- P(d);CHECK
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- B(a);XQ(D)::S(A),XB(a)
- Refutation
- P(d);CHECK
- Try
- Q(D);XB(b)
- Threat
- QAB(D)
- Vars
- P(d);OGATE,XQ(D)::B(G)
- Refutation
- P(e);XQ(D)
- Try
- Actual
- Q(D);
- Threat
- QAR(D)+B(G),DCHECK
- Vars
- P(d);CHECK,S_CUTB(a)::QAR(D)+B(G)
- B(a);N_GUARD,XQ(D)::S(A)
- S(k);::QAR(D)+B(G),DCHECK,XS(k)
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