MESON Chess Problem Database
Problem Display
PID: 194673 (8/8/2p1BB1b/2P2R2/n3k3/3b3N/3R1PP1/1NK5 w - - 0 1)
Stewart, John
The Observer, 1941
(First published on Sun Mar 9 1941)
#2
10 + 5
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Bxb1
- 2.Re5#
- 1...Bf1
- 2.Re5#
- 1...Bc2
- 2.Re5#
- 1...Be2
- 2.Re5#
- 1...Bc4
- 2.Re5#
- 1...Bb5
- 2.Re5#
- 1...Ba6
- 2.Re5#
- 1...Bxd2+
- 2.Sxd2#
- 1...Be3
- 2.f3#
- 1...Bf4
- 2.Rxf4#
- 1...Bg5
- 2.Sxg5#
- 1...Bg7
- 2.Sg5#
- 2.Rf4#
- 1...Bf8
- 2.Sg5#
- 2.Rf4#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sxc5
- 2.Sc3#
- 1...Sb6
- 2.Sc3#
- 1...Bxb1
- Tries
- 1.Bd7?
- 1...Bxd2+
- 2.Sxd2#
- 1...Bxb1
- 2.Re5#
- 1...Sxc5
- 2.Sc3#
- 1...Bf1
- 2.Re5#
- 1...Bc2
- 2.Re5#
- 1...Be2
- 2.Re5#
- 1...Bc4
- 2.Re5#
- 1...Bb5
- 2.Re5#
- 1...Ba6
- 2.Re5#
- 1...Be3
- 2.f3#
- 1...Bg5
- 2.Sxg5#
- 1...Bg7
- 2.Sg5#
- 1...Bf8
- 2.Sg5#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sb6
- 2.Sc3#
- 1...Bf4!
- 1...Bxd2+
- 1.Bc8?
- 1...Bxd2+
- 2.Sxd2#
- 1...Bxb1
- 2.Re5#
- 1...Sxc5
- 2.Sc3#
- 1...Bf1
- 2.Re5#
- 1...Bc2
- 2.Re5#
- 1...Be2
- 2.Re5#
- 1...Bc4
- 2.Re5#
- 1...Bb5
- 2.Re5#
- 1...Ba6
- 2.Re5#
- 1...Be3
- 2.f3#
- 1...Bg5
- 2.Sxg5#
- 1...Bg7
- 2.Sg5#
- 1...Bf8
- 2.Sg5#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sb6
- 2.Sc3#
- 1...Bf4!
- 1...Bxd2+
- 1.Bc3?
- threat
- 2.Re5#
- 1...Bxd2+
- 2.Sxd2#
- 1...Bf4
- 2.Rxf4#
- 1...Bg7
- 2.Sg5#
- 2.Rf4#
- 1...Sxc3!
- threat
- 1.Bg7?
- 1...Bxd2+
- 2.Sxd2#
- 1...Bxb1
- 2.Re5#
- 1...Sxc5
- 2.Sc3#
- 1...Bf4
- 2.Rxf4#
- 1...Bf1
- 2.Re5#
- 1...Bc2
- 2.Re5#
- 1...Be2
- 2.Re5#
- 1...Bc4
- 2.Re5#
- 1...Bb5
- 2.Re5#
- 1...Ba6
- 2.Re5#
- 1...Be3
- 2.f3#
- 1...Bg5
- 2.Sxg5#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sb6
- 2.Sc3#
- 1...Bxg7!
- 1...Bxd2+
- 1.Bh8?
- 1...Bxd2+
- 2.Sxd2#
- 1...Bxb1
- 2.Re5#
- 1...Sxc5
- 2.Sc3#
- 1...Bf4
- 2.Rxf4#
- 1...Bf1
- 2.Re5#
- 1...Bc2
- 2.Re5#
- 1...Be2
- 2.Re5#
- 1...Bc4
- 2.Re5#
- 1...Bb5
- 2.Re5#
- 1...Ba6
- 2.Re5#
- 1...Be3
- 2.f3#
- 1...Bg5
- 2.Sxg5#
- 1...Bf8
- 2.Sg5#
- 2.Rf4#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sb6
- 2.Sc3#
- 1...Bg7!
- 1...Bxd2+
- 1.Rd5?
- threat
- 2.Rd4#
- 1...Bxd2+
- 2.Sxd2#
- 1...Be3
- 2.f3#
- 1...cxd5!
- threat
- 1.Rg5?
- 1...Bxb1
- 2.Bf5#
- 2.Rd4#
- 2.Re5#
- 1...Sxc5
- 2.Sc3#
- 1...Bf1
- 2.Bf5#
- 2.Rd4#
- 2.Re5#
- 1...Bc2
- 2.Bf5#
- 2.Rd4#
- 2.Re5#
- 1...Be2
- 2.Bf5#
- 2.Rd4#
- 2.Re5#
- 1...Bc4
- 2.Bf5#
- 2.Rd4#
- 2.Re5#
- 1...Bb5
- 2.Bf5#
- 2.Rd4#
- 2.Re5#
- 1...Ba6
- 2.Bf5#
- 2.Rd4#
- 2.Re5#
- 1...Bg7
- 2.Rg4#
- 1...Bf8
- 2.Rg4#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sb6
- 2.Sc3#
- 1...Bxg5!
- 1...Bxb1
- 1.Bd7?
- Keys
- 1.Rf3!
- 1...Bxd2+
- 2.Sxd2#
- 1...Bxb1
- 2.Bf5#
- 1...Sxc5
- 2.Sc3#
- 1...Bf4
- 2.Rxf4#
- 1...Bf1
- 2.Bf5#
- 1...Bc2
- 2.Bf5#
- 1...Be2
- 2.Bf5#
- 1...Bc4
- 2.Bf5#
- 1...Bb5
- 2.Bf5#
- 1...Ba6
- 2.Bf5#
- 1...Be3
- 2.Rxe3#
- 1...Bg5
- 2.Sxg5#
- 1...Bg7
- 2.Sg5#
- 2.Re3#
- 2.Rf4#
- 1...Bf8
- 2.Sg5#
- 2.Re3#
- 2.Rf4#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sb6
- 2.Sc3#
- 1...Bxd2+
- 1.Rf3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(a);XS(A)::R1(H)
- B(a);::R1(H)
- B(e);CHECK,XR(C)::S(A),XB(e)
- B(e);SBLOCK::P(D)
- B(e);N_GUARD::R1(H),XB(e)
- B(e);N_GUARD::S(F),XB(e)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(b);N_GUARD,XP(G)::S(A)
- Tries
- Try
- B(I);
- Vars
- B(e);CHECK,XR(C)::S(A),XB(e)
- B(a);XS(A)::R1(H)
- S(b);N_GUARD,XP(G)::S(A)
- B(a);::R1(H)
- B(e);SBLOCK::P(D)
- B(e);N_GUARD::S(F),XB(e)
- B(e);N_GUARD,N_PINR(C)::S(F)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- B(e);
- Try
- B(I);
- Vars
- B(e);CHECK,XR(C)::S(A),XB(e)
- B(a);XS(A)::R1(H)
- S(b);N_GUARD,XP(G)::S(A)
- B(a);::R1(H)
- B(e);SBLOCK::P(D)
- B(e);N_GUARD::S(F),XB(e)
- B(e);N_GUARD,N_PINR(C)::S(F)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- B(e);
- Try
- B(J);
- Threat
- R1(H)
- Vars
- B(e);CHECK,XR(C)::S(A),XB(e)
- B(e);N_GUARD::R1(H),XB(e)
- Refutation
- S(b);XB(J)
- Try
- B(J);
- Vars
- B(e);CHECK,XR(C)::S(A),XB(e)
- B(a);XS(A)::R1(H)
- S(b);N_GUARD,XP(G)::S(A)
- B(e);N_GUARD::R1(H),XB(e)
- B(a);::R1(H)
- B(e);SBLOCK::P(D)
- B(e);N_GUARD::S(F),XB(e)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- B(e);N_PINR(C),XB(J)
- Try
- B(J);
- Vars
- B(e);CHECK,XR(C)::S(A),XB(e)
- B(a);XS(A)::R1(H)
- S(b);N_GUARD,XP(G)::S(A)
- B(e);N_GUARD::R1(H),XB(e)
- B(a);::R1(H)
- B(e);SBLOCK::P(D)
- B(e);N_GUARD::S(F),XB(e)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- B(e);N_PINR(C)
- Try
- R(H);
- Threat
- R1(H)
- Vars
- B(e);CHECK,XR(C)::S(A),XB(e)
- B(e);SBLOCK::P(D)
- Refutation
- P(d);XR(H)
- Try
- R(H);N_SPINR(C)
- Vars
- S(b);N_GUARD,XP(G)::S(A)
- B(e);N_GUARD::R(H)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- B(e);P_PINR(C),XR(H)
- Try
- Actual
- R(H);
- Vars
- B(e);CHECK,XR(C)::S(A),XB(e)
- B(a);XS(A)::B(I)
- S(b);N_GUARD,XP(G)::S(A)
- B(e);N_GUARD::R1(H),XB(e)
- B(a);::B(I)
- B(e);N_GUARD::S(F),XB(e)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
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