MESON Chess Problem Database
Problem Display
PID: 200934 (8/2p4K/2R5/3Np2p/7P/1r1kBB2/4R3/3r4 w - - 0 1)
Rains, Cyril George
The Observer, 1949
(First published on Sun Jan 30 1949)
#2
7 + 6
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rg1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.Rc3#
- 1...Rb2
- 2.Rc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sb4#
- 2.Rxc3#
- 1...Rb4
- 2.Sxb4#
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb6
- 2.Rc3#
- 1...Rb7
- 2.Rc3#
- 1...Rb8
- 2.Rc3#
- 1...e4
- 2.Sf4#
- 1...Ra1
- Tries
- 1.Kh6?
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rg1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.Rc3#
- 1...Rb2
- 2.Rc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sb4#
- 2.Rxc3#
- 1...Rb4
- 2.Sxb4#
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb7
- 2.Rc3#
- 1...Rb8
- 2.Rc3#
- 1...e4
- 2.Sf4#
- 1...Rb6!
- 1...Ra1
- 1.Kg7?
- 1...Rb6
- 2.Rc3#
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.Rc3#
- 1...Rb2
- 2.Rc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sb4#
- 2.Rxc3#
- 1...Rb4
- 2.Sxb4#
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb7
- 2.Rc3#
- 1...Rb8
- 2.Rc3#
- 1...e4
- 2.Sf4#
- 1...Rg1+!
- 1...Rb6
- 1.Kh8?
- 1...Rb6
- 2.Rc3#
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rg1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.Rc3#
- 1...Rb2
- 2.Rc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sb4#
- 2.Rxc3#
- 1...Rb4
- 2.Sxb4#
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb7
- 2.Rc3#
- 1...e4
- 2.Sf4#
- 1...Rb8+!
- 1...Rb6
- 1.Rb2?
- threat
- 2.Rxb3#
- 1...Rxb2
- 2.Rc3#
- 1...Rb6
- 2.Rc3#
- 1...Rb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Rc3
- 2.Rxc3#
- 1...Rb4
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb7
- 2.Rc3#
- 1...Rb8
- 2.Rc3#
- 1...Ra3!
- threat
- 1.Rec2?
- 1...Rc3
- 2.R2xc3#
- 2.R6xc3#
- 1...Rb6
- 2.R2c3#
- 2.R6c3#
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rg1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.R2c3#
- 2.R6c3#
- 1...Rb2
- 2.R2c3#
- 2.R6c3#
- 1...Rb4
- 2.R2c3#
- 2.R6c3#
- 1...Rb5
- 2.R2c3#
- 2.R6c3#
- 1...Rb7
- 2.R2c3#
- 2.R6c3#
- 1...Rb8
- 2.R2c3#
- 2.R6c3#
- 1...e4
- 2.Be2#
- 1...Ra3!
- 1...Rc3
- 1.Rf2?
- 1...Rb6
- 2.Rc3#
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rg1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.Rc3#
- 1...Rb2
- 2.Rc3#
- 1...Rc3
- 2.Rxc3#
- 1...Rb4
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb7
- 2.Rc3#
- 1...Rb8
- 2.Rc3#
- 1...e4
- 2.Be2#
- 1...Ra3!
- 1...Rb6
- 1.Rg2?
- 1...Rb6
- 2.Rc3#
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rg1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.Rc3#
- 1...Rb2
- 2.Rc3#
- 1...Rc3
- 2.Rxc3#
- 1...Rb4
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb7
- 2.Rc3#
- 1...Rb8
- 2.Rc3#
- 1...e4
- 2.Be2#
- 1...Ra3!
- 1...Rb6
- 1.Rh2?
- 1...Rb6
- 2.Rc3#
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rg1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.Rc3#
- 1...Rb2
- 2.Rc3#
- 1...Rc3
- 2.Rxc3#
- 1...Rb4
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb7
- 2.Rc3#
- 1...Rb8
- 2.Rc3#
- 1...e4
- 2.Be2#
- 1...Ra3!
- 1...Rb6
- 1.Rc5?
- 1...Rb6
- 2.Rc3#
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rg1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.Rc3#
- 1...Rb2
- 2.Rc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sb4#
- 2.Rxc3#
- 1...Rb4
- 2.Sxb4#
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb7
- 2.Rc3#
- 1...Rb8
- 2.Rc3#
- 1...e4
- 2.Sf4#
- 1...c6!
- 1...Rb6
- 1.Rxc7?
- 1...Rb6
- 2.Rc3#
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rg1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.Rc3#
- 1...Rb2
- 2.Rc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sb4#
- 2.Rxc3#
- 1...Rb4
- 2.Sxb4#
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb8
- 2.Rc3#
- 1...e4
- 2.Sf4#
- 1...Rb7!
- 1...Rb6
- 1.Kh6?
- Keys
- 1.Ra2!
- 1...Rb6
- 2.Rc3#
- 1...Ra1
- 2.Rd2#
- 1...Rdb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rg1
- 2.Rd2#
- 1...Rh1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rbb1
- 2.Rc3#
- 1...Rb2
- 2.Rc3#
- 1...Ra3
- 2.Rxa3#
- 1...Rc3
- 2.Rxc3#
- 1...Rb4
- 2.Rc3#
- 1...Rb5
- 2.Rc3#
- 1...Rb7
- 2.Rc3#
- 1...Rb8
- 2.Rc3#
- 1...e4
- 2.Be2#
- 1...Rb6
- 1.Ra2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- R(b);N_GUARD::R1(F)
- R(b);N_GUARD::S(E)
- P(d);N_GUARD::S(E)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- R(b);N_GUARD::R1(F)
- R(b);N_GUARD::S(E)
- P(d);N_GUARD::S(E)
- Refutation
- R(b);P_PINR(F)
- Try
- K(G);P-FLIGHT
- Vars
- R(b);N_GUARD::R1(F)
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- R(b);N_GUARD::S(E)
- P(d);N_GUARD::S(E)
- Refutation
- R(a);CHECK
- Try
- K(G);P-FLIGHT
- Vars
- R(b);N_GUARD::R1(F)
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- R(b);N_GUARD::S(E)
- P(d);N_GUARD::S(E)
- Refutation
- R(b);CHECK
- Try
- R(A);
- Threat
- R(A),XR(b)
- Vars
- R(b);N_GUARD,XR(A)::R1(F)
- R(b);N_GUARD::R1(F)
- R(a);N_GUARD::R1(A)
- R(b);N_GUARD::R1(F),XR(b)
- Refutation
- R(b);
- Try
- R(A);
- Vars
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- P(d);SBLOCK::B(C)
- Refutation
- R(b);
- Try
- R(A);
- Vars
- R(b);N_GUARD::R1(F)
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- R(b);N_GUARD::R1(F),XR(b)
- P(d);SBLOCK::B(C)
- Refutation
- R(b);
- Try
- R(A);
- Vars
- R(b);N_GUARD::R1(F)
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- R(b);N_GUARD::R1(F),XR(b)
- P(d);SBLOCK::B(C)
- Refutation
- R(b);
- Try
- R(A);
- Vars
- R(b);N_GUARD::R1(F)
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- R(b);N_GUARD::R1(F),XR(b)
- P(d);SBLOCK::B(C)
- Refutation
- R(b);
- Try
- R(F);
- Vars
- R(b);N_GUARD::R1(F)
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- R(b);N_GUARD::S(E)
- P(d);N_GUARD::S(E)
- Refutation
- P(f);
- Try
- R(F);XP(f)
- Vars
- R(b);N_GUARD::R1(F)
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- R(b);N_GUARD::S(E)
- P(d);N_GUARD::S(E)
- Refutation
- R(b);P_PINR(F)
- Try
- Actual
- R(A);
- Vars
- R(b);N_GUARD::R1(F)
- R(a);N_GUARD::R1(A)
- R(a);N_GUARD::R1(A),XR(a)
- R(b);OGATEB::R(A),XR(b)
- R(b);N_GUARD::R1(F),XR(b)
- P(d);SBLOCK::B(C)
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