MESON Chess Problem Database
Problem Display
PID: 187570 (8/3p3Q/3Bb1B1/3P2pP/rp4kr/1R3p1p/2N4K/3n4 w - - 0 1)
Cornell, CFT
Rains, Cyril George
The Observer, 1936
(First published on Sun Mar 15 1936)
#2
8 + 10
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rxb4#
- 1...Ra2
- 2.Rxb4#
- 1...Ra3
- 2.Rxb4#
- 1...Ra5
- 2.Rxb4#
- 1...Ra6
- 2.Rxb4#
- 1...Ra7
- 2.Rxb4#
- 1...Ra8
- 2.Rxb4#
- 1...Rxh5
- 2.Qxh5#
- 1...Bxd5
- 2.Bf5#
- 1...Bf5
- 2.Bxf5#
- 1...Bf7
- 2.Bf5#
- 1...Bg8
- 2.Bf5#
- 1...Sb2
- 2.Se3#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...f2
- 2.Rg3#
- 1...Ra1
- Tries
- 1.Be5?
- 1...Rxh5
- 2.Qxh5#
- 1...Bxd5
- 2.Bf5#
- 1...Sb2
- 2.Se3#
- 1...Ra1
- 2.Rxb4#
- 1...Ra2
- 2.Rxb4#
- 1...Ra3
- 2.Rxb4#
- 1...Ra5
- 2.Rxb4#
- 1...Ra6
- 2.Rxb4#
- 1...Ra7
- 2.Rxb4#
- 1...Ra8
- 2.Rxb4#
- 1...Bf5
- 2.Bxf5#
- 1...Bf7
- 2.Bf5#
- 1...Bg8
- 2.Bf5#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...f2
- 2.Rg3#
- 1...d6!
- 1...Rxh5
- 1.Bc7?
- 1...Rxh5
- 2.Qxh5#
- 1...Bxd5
- 2.Bf5#
- 1...Sb2
- 2.Se3#
- 1...Ra1
- 2.Rxb4#
- 1...Ra2
- 2.Rxb4#
- 1...Ra3
- 2.Rxb4#
- 1...Ra5
- 2.Rxb4#
- 1...Ra6
- 2.Rxb4#
- 1...Ra7
- 2.Rxb4#
- 1...Ra8
- 2.Rxb4#
- 1...Bf5
- 2.Bxf5#
- 1...Bf7
- 2.Bf5#
- 1...Bg8
- 2.Bf5#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...f2
- 2.Rg3#
- 1...d6!
- 1...Rxh5
- 1.Bb8?
- 1...Rxh5
- 2.Qxh5#
- 1...Bxd5
- 2.Bf5#
- 1...Sb2
- 2.Se3#
- 1...Ra1
- 2.Rxb4#
- 1...Ra2
- 2.Rxb4#
- 1...Ra3
- 2.Rxb4#
- 1...Ra5
- 2.Rxb4#
- 1...Ra6
- 2.Rxb4#
- 1...Ra7
- 2.Rxb4#
- 1...Ra8
- 2.Rxb4#
- 1...Bf5
- 2.Bxf5#
- 1...Bf7
- 2.Bf5#
- 1...Bg8
- 2.Bf5#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...f2
- 2.Rg3#
- 1...d6!
- 1...Rxh5
- 1.Be4?
- threat
- 2.Bxf3#
- 1...Bxd5
- 2.Bf5#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...f2
- 2.Bf3#
- 2.Rg3#
- 1...Rxh5!
- threat
- 1.Rd3?
- threat
- 2.Rd4#
- 1...Bxd5
- 2.Bf5#
- 1...Bf5
- 2.Bxf5#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...f2
- 2.Rg3#
- 1...b3!
- threat
- 1.dxe6?
- threat
- 2.Bf5#
- 1...Rxh5
- 2.Qxh5#
- 1...Ra5
- 2.Rxb4#
- 1...Se3
- 2.Sxe3#
- 1...dxe6!
- threat
- 1.Be5?
- Keys
- 1.Bd3!
- 1...Rxh5
- 2.Qe4#
- 1...Bxd5
- 2.Bf5#
- 1...f2
- 2.Be2#
- 1...Sb2
- 2.Se3#
- 1...Ra1
- 2.Rxb4#
- 1...Ra2
- 2.Rxb4#
- 1...Ra3
- 2.Rxb4#
- 1...Ra5
- 2.Rxb4#
- 1...Ra6
- 2.Rxb4#
- 1...Ra7
- 2.Rxb4#
- 1...Ra8
- 2.Rxb4#
- 1...Bf5
- 2.Bxf5#
- 1...Bf7
- 2.Bf5#
- 1...Bg8
- 2.Bf5#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Rxh5
- 1.Bd3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(d);N_GUARD::R(C),XP(e)
- R(d);N_GUARD,P_PINS(A)::R(C),XP(e)
- R(g);OGATE,XP(E)::QAB1(H),XR(g)
- B(i);N_GUARD,XP(D)::B(G)
- B(i);N_GUARD::B(G),XB(i)
- B(i);N_GUARD::B(G)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(b);OGATE::R1(C)
- Tries
- Try
- B(F);
- Vars
- R(g);OGATE,XP(E)::QAB1(H),XR(g)
- B(i);N_GUARD,XP(D)::B(G)
- S(a);N_GUARD::S(A)
- R(d);N_GUARD::R(C),XP(e)
- R(d);N_GUARD,P_PINS(A)::R(C),XP(e)
- B(i);N_GUARD::B(G),XB(i)
- B(i);N_GUARD::B(G)
- S(a);N_GUARD::S(A),XS(a)
- P(b);OGATE::R1(C)
- Refutation
- P(j);
- Try
- B(F);
- Vars
- R(g);OGATE,XP(E)::QAB1(H),XR(g)
- B(i);N_GUARD,XP(D)::B(G)
- S(a);N_GUARD::S(A)
- R(d);N_GUARD::R(C),XP(e)
- R(d);N_GUARD,P_PINS(A)::R(C),XP(e)
- B(i);N_GUARD::B(G),XB(i)
- B(i);N_GUARD::B(G)
- S(a);N_GUARD::S(A),XS(a)
- P(b);OGATE::R1(C)
- Refutation
- P(j);
- Try
- B(F);
- Vars
- R(g);OGATE,XP(E)::QAB1(H),XR(g)
- B(i);N_GUARD,XP(D)::B(G)
- S(a);N_GUARD::S(A)
- R(d);N_GUARD::R(C),XP(e)
- R(d);N_GUARD,P_PINS(A)::R(C),XP(e)
- B(i);N_GUARD::B(G),XB(i)
- B(i);N_GUARD::B(G)
- S(a);N_GUARD::S(A),XS(a)
- P(b);OGATE::R1(C)
- Refutation
- P(j);
- Try
- B(G);
- Threat
- B(G),XP(b)
- Vars
- B(i);N_GUARD,XP(D)::B(G)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- Refutation
- R(g);XP(E)
- Try
- R(C);
- Threat
- R(C)
- Vars
- B(i);N_GUARD,XP(D)::B(G)
- B(i);N_GUARD::B(G),XB(i)
- S(a);N_GUARD::S(A)
- P(b);OGATE::R1(C)
- Refutation
- P(e);
- Try
- P(D);XB(i)
- Threat
- B(G)
- Vars
- R(g);OGATE,XP(E)::QAB1(H),XR(g)
- R(d);N_GUARD::R(C),XP(e)
- S(a);N_GUARD::S(A),XS(a)
- Refutation
- P(j);XP(D)
- Try
- Actual
- B(G);
- Vars
- R(g);SBLOCK,XP(E)::QAR2(H)
- B(i);N_GUARD,XP(D)::B(G)
- P(b);OGATEB::B(G)
- S(a);N_GUARD::S(A)
- R(d);N_GUARD::R(C),XP(e)
- R(d);N_GUARD,P_PINS(A)::R(C),XP(e)
- B(i);N_GUARD::B(G),XB(i)
- B(i);N_GUARD::B(G)
- S(a);N_GUARD::S(A),XS(a)
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