MESON Chess Problem Database
Problem Display
PID: 271568 (1B6/1Q3B2/N1nPb3/r2k2p1/1p1p1P2/7R/p2NP3/K7 w - - 0 1)
Thomson, Robert Gavin
Sunday Referee, 1933
(First published on Sun May 14 1933)
#2
10 + 8
| 15239 | Valois Notebooks | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Sxb4#
- 1...Rxa6
- 2.Qb5#
- 1...Bxf7
- 2.Qxf7#
- 1...b3
- 2.Qxb3#
- 1...d3
- 2.Rxd3#
- 1...gxf4
- 2.Rh5#
- 1...g4
- 2.Rh5#
- 1...Ra3
- Tries
- 1.Bg8?
- 1...Rxa6
- 2.Qb5#
- 1...gxf4
- 2.Rh5#
- 1...Bf7
- 2.Bxf7#
- 2.Qxf7#
- 1...d3
- 2.Rxd3#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Sxb4#
- 1...b3
- 2.Qxb3#
- 1...g4
- 2.Rh5#
- 1...Bxg8!
- 1...Rxa6
- 1.Bc7?
- 1...Rxa6
- 2.Qb5#
- 1...gxf4
- 2.Rh5#
- 1...d3
- 2.Rxd3#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Sxb4#
- 1...b3
- 2.Qxb3#
- 1...g4
- 2.Rh5#
- 1...Bxf7!
- 1...Rxa6
- 1.Rh1?
- 1...Rxa6
- 2.Qb5#
- 1...Bxf7
- 2.Qxf7#
- 1...gxf4
- 2.Rh5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Sxb4#
- 1...b3
- 2.Qxb3#
- 1...g4
- 2.Rh5#
- 1...d3!
- 1...Rxa6
- 1.Rh2?
- 1...Rxa6
- 2.Qb5#
- 1...Bxf7
- 2.Qxf7#
- 1...gxf4
- 2.Rh5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Sxb4#
- 1...b3
- 2.Qxb3#
- 1...g4
- 2.Rh5#
- 1...d3!
- 1...Rxa6
- 1.Rd3?
- threat
- 2.e4#
- 1...Rxa6
- 2.Qb5#
- 1...Bxf7
- 2.Qxf7#
- 1...gxf4!
- threat
- 1.Re3?
- threat
- 2.Bxe6#
- 2.Re5#
- 1...Rxa6
- 2.Re5#
- 2.Qb5#
- 1...Bxf7
- 2.Re5#
- 2.Qxf7#
- 1...gxf4
- 2.Bxe6#
- 1...d3
- 2.Rxd3#
- 1...dxe3!
- threat
- 1.Rg3?
- threat
- 2.Rxg5#
- 1...Bxf7
- 2.Qxf7#
- 1...gxf4
- 2.Rg5#
- 1...d3
- 2.Rxd3#
- 1...g4!
- threat
- 1.Rh5?
- threat
- 2.Rxg5#
- 1...Bxf7
- 2.Qxf7#
- 1...d3!
- threat
- 1.Rh6?
- threat
- 2.Bxe6#
- 1...Rxa6
- 2.Qb5#
- 1...Bxf7
- 2.Qxf7#
- 1...gxf4
- 2.Rh5#
- 1...d3!
- threat
- 1.Rh7?
- 1...Rxa6
- 2.Qb5#
- 1...Bxf7
- 2.Qxf7#
- 1...gxf4
- 2.Rh5#
- 1...g4
- 2.Rh5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Sxb4#
- 1...b3
- 2.Qxb3#
- 1...d3!
- 1...Rxa6
- 1.Rh8?
- 1...Rxa6
- 2.Qb5#
- 1...Bxf7
- 2.Qxf7#
- 1...gxf4
- 2.Rh5#
- 1...g4
- 2.Rh5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Sxb4#
- 1...b3
- 2.Qxb3#
- 1...d3!
- 1...Rxa6
- 1.d7?
- threat
- 2.d8Q#
- 2.d8R#
- 1...Rxa6
- 2.Qb5#
- 1...gxf4
- 2.Rh5#
- 2.d8Q#
- 2.d8R#
- 1...d3
- 2.Rxd3#
- 2.d8Q#
- 2.d8R#
- 1...g4
- 2.Rh5#
- 2.d8Q#
- 2.d8R#
- 1...Ra3
- 2.Qb5#
- 2.d8Q#
- 2.d8R#
- 1...Ra4
- 2.Qb5#
- 2.d8Q#
- 2.d8R#
- 1...Rb5
- 2.Qxb5#
- 2.d8Q#
- 2.d8R#
- 1...Rc5
- 2.Sxb4#
- 2.d8Q#
- 2.d8R#
- 1...b3
- 2.Qxb3#
- 2.d8Q#
- 2.d8R#
- 1...Bxf7!
- threat
- 1.Bg8?
- Keys
- 1.Ra3!
- threat
- 2.Rxa5#
- 1...Rxa3
- 2.Qb5#
- 1...Rxa6
- 2.Qb5#
- 1...Bxf7
- 2.Qxf7#
- 1...bxa3
- 2.Qb3#
- 1...d3
- 2.Rxd3#
- 1...Ra4
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Sxb4#
- threat
- 1.Ra3!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- R(d);N_GUARD::QAR2(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- R(d);SBLOCK::S(F),XP(b)
- R(d);N_GUARD,XS(F)::QAR2(H)
- B(h);N_SPINB(h),OGATE,XB(I)::QAB(H),XB(h)
- P(b);OGATE::QAB(H),XP(b)
- P(c);OGATEB::R(D),XP(c)
- P(f);OGATEB,XP(E)::R(D)
- P(f);OGATEB::R(D)
- Tries
- Try
- B(I);
- Vars
- R(d);N_GUARD,XS(F)::QAR2(H)
- P(f);OGATEB,XP(E)::R(D)
- P(c);OGATEB::R(D),XP(c)
- R(d);N_GUARD::QAR2(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- R(d);SBLOCK::S(F),XP(b)
- P(b);OGATE::QAB(H),XP(b)
- P(f);OGATEB::R(D)
- Refutation
- B(h);N_SPINB(h),XB(I)
- Try
- B(J);
- Vars
- R(d);N_GUARD,XS(F)::QAR2(H)
- P(f);OGATEB,XP(E)::R(D)
- P(c);OGATEB::R(D),XP(c)
- R(d);N_GUARD::QAR2(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- R(d);SBLOCK::S(F),XP(b)
- P(b);OGATE::QAB(H),XP(b)
- P(f);OGATEB::R(D)
- Refutation
- B(h);N_SPINB(h),XB(I)
- Try
- R(D);
- Vars
- R(d);N_GUARD,XS(F)::QAR2(H)
- B(h);N_SPINB(h),OGATE,XB(I)::QAB(H),XB(h)
- P(f);OGATEB,XP(E)::R(D)
- R(d);N_GUARD::QAR2(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- R(d);SBLOCK::S(F),XP(b)
- P(b);OGATE::QAB(H),XP(b)
- P(f);OGATEB::R(D)
- Refutation
- P(c);
- Try
- R(D);
- Vars
- R(d);N_GUARD,XS(F)::QAR2(H)
- B(h);N_SPINB(h),OGATE,XB(I)::QAB(H),XB(h)
- P(f);OGATEB,XP(E)::R(D)
- R(d);N_GUARD::QAR2(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- R(d);SBLOCK::S(F),XP(b)
- P(b);OGATE::QAB(H),XP(b)
- P(f);OGATEB::R(D)
- Refutation
- P(c);
- Try
- R(D);P_PINP(c)
- Threat
- P(C)
- Vars
- R(d);N_GUARD,XS(F)::QAR2(H)
- B(h);N_SPINB(h),OGATE,XB(I)::QAB(H),XB(h)
- Refutation
- P(f);XP(E)
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- P(f);XP(E)::B(I),XB(h)
- P(c);OGATEB::R(D),XP(c)
- Refutation
- P(c);XR(D)
- Try
- R(D);
- Threat
- R(D),XP(f)
- Vars
- B(h);N_SPINB(h),OGATE,XB(I)::QAB(H),XB(h)
- P(f);XP(E)::R(D)
- P(c);OGATEB::R(D),XP(c)
- Refutation
- P(f);
- Try
- R(D);P_PINP(f)
- Threat
- R(D),XP(f)
- Vars
- B(h);N_SPINB(h),OGATE,XB(I)::QAB(H),XB(h)
- Refutation
- P(c);
- Try
- R(D);
- Threat
- B(I),XB(h)
- Vars
- R(d);N_GUARD,XS(F)::QAR2(H)
- B(h);N_SPINB(h),OGATE,XB(I)::QAB(H),XB(h)
- P(f);OGATEB,XP(E)::R(D)
- Refutation
- P(c);
- Try
- R(D);
- Vars
- R(d);N_GUARD,XS(F)::QAR2(H)
- B(h);N_SPINB(h),OGATE,XB(I)::QAB(H),XB(h)
- P(f);OGATEB,XP(E)::R(D)
- P(f);OGATEB::R(D)
- R(d);N_GUARD::QAR2(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- R(d);SBLOCK::S(F),XP(b)
- P(b);OGATE::QAB(H),XP(b)
- Refutation
- P(c);
- Try
- R(D);
- Vars
- R(d);N_GUARD,XS(F)::QAR2(H)
- B(h);N_SPINB(h),OGATE,XB(I)::QAB(H),XB(h)
- P(f);OGATEB,XP(E)::R(D)
- P(f);OGATEB::R(D)
- R(d);N_GUARD::QAR2(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- R(d);SBLOCK::S(F),XP(b)
- P(b);OGATE::QAB(H),XP(b)
- Refutation
- P(c);
- Try
- P(G);
- Threat
- P=Q
- Vars
- R(d);N_GUARD,XS(F)::QAR2(H)
- Refutation
- B(h);N_SPINB(h),XB(I)
- Try
- Actual
- R(D);
- Threat
- R(D),XR(d)
- Vars
- R(d);N_GUARD,XR(D)::QAR2(H)
- R(d);N_GUARD,XS(F)::QAR2(H)
- B(h);N_SPINB(h),OGATE,XB(I)::QAB(H),XB(h)
- P(b);OGATE,XR(D)::QAB(H)
- P(c);OGATEB::R(D),XP(c)
- R(d);N_GUARD::QAR2(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- R(d);SBLOCK::S(F),XP(b)
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