MESON Chess Problem Database
Problem Display
PID: 269975 (3RN3/n3p2n/K3k1PN/1p2p3/p4p1b/P5rb/2Q1P3/8 w - - 0 1)
Thomson, Robert Gavin
Sunday Referee, 1931
(First published on Sun Mar 15 1931)
#2
8 + 11
| 15239 | Valois Notebooks | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Rg1
- 2.Qa2#
- 1...Rg2
- 2.Qa2#
- 1...Rg4
- 2.Qf5#
- 2.Qa2#
- 1...Rg5
- 2.Qa2#
- 1...Rxg6
- 2.Qa2#
- 1...Bf1
- 2.Qf5#
- 1...Bg2
- 2.Qf5#
- 1...Bf5
- 2.Qxf5#
- 1...Bf6
- 2.Sc7#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qxc8#
- 1...Sf6
- 2.Sc7#
- 2.Sg7#
- 1...f3
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...e4
- 2.Qxe4#
- 1...Rg1
- Tries
- 1.Sg8?
- threat
- 2.Sc7#
- 2.Sg7#
- 1...Rd3
- 2.Sg7#
- 1...e4
- 2.Qxe4#
- 1...Rc3
- 2.Sg7#
- 1...Bf6
- 2.Sc7#
- 1...Rxg6!
- threat
- 1.Qd1?
- threat
- 2.Qd5#
- 2.Qd7#
- 1...e4
- 2.Qd5#
- 1...Bg2
- 2.Qd7#
- 1...Sf6
- 2.Sc7#
- 2.Sg7#
- 1...Sf8
- 2.Qd5#
- 1...Rd3!
- threat
- 1.Qd3?
- threat
- 2.Qd5#
- 2.Qd7#
- 1...e4
- 2.Qxe4#
- 2.Qd5#
- 1...Bg2
- 2.Qf5#
- 2.Qd7#
- 1...Sf6
- 2.Sc7#
- 2.Sg7#
- 1...Sf8
- 2.Qd5#
- 1...Rxd3!
- threat
- 1.Qe4?
- threat
- 2.Qd5#
- 1...Bg2
- 2.Qf5#
- 1...Sf6
- 2.Sc7#
- 2.Sg7#
- 1...Rd3!
- threat
- 1.Qd2?
- threat
- 2.Qd5#
- 2.Qd7#
- 1...e4
- 2.Qd5#
- 1...Bg2
- 2.Qd7#
- 1...Sf6
- 2.Sc7#
- 2.Sg7#
- 1...Sf8
- 2.Qd5#
- 1...Rd3!
- threat
- 1.Sg8?
- Keys
- 1.g7!
- 1...Rxa3
- 2.g8Q#
- 2.g8B#
- 1...Rxg7
- 2.Qa2#
- 1...e4
- 2.Qxe4#
- 1...Rd3
- 2.g8Q#
- 2.g8B#
- 1...Rg1
- 2.Qa2#
- 1...Rg2
- 2.Qa2#
- 1...Rb3
- 2.g8Q#
- 2.g8B#
- 1...Rc3
- 2.g8Q#
- 2.g8B#
- 1...Re3
- 2.g8Q#
- 2.g8B#
- 1...Rf3
- 2.g8Q#
- 2.g8B#
- 1...Rg4
- 2.Qf5#
- 2.Qa2#
- 1...Rg5
- 2.Qa2#
- 1...Rg6
- 2.Qa2#
- 1...Bf1
- 2.Qf5#
- 1...Bg2
- 2.Qf5#
- 1...Bg4
- 2.g8Q#
- 2.g8B#
- 1...Bf5
- 2.Qxf5#
- 1...Bg5
- 2.g8Q#
- 2.g8B#
- 1...Bf6
- 2.Sc7#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qxc8#
- 1...Sg5
- 2.Qg6#
- 1...Sf6
- 2.Sc7#
- 1...Sf8
- 2.gxf8S#
- 1...f3
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...Rxa3
- 1.g7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::QAB(A)
- R(a);N_GUARD,XP(E)::QAB(A)
- B(b);N_GUARD::QAB1(A)
- B(b);N_GUARD::QAB1(A),XB(b)
- B(e);SBLOCK::S(H)
- S(i);N_GUARD::QAR2(A),XS(i)
- S(i);N_GUARD::QAB(A),XS(i)
- P(d);S_CUTR(a)::QAB(A)
- P(f);N_GUARD::QAB(A)
- P(g);OGATEB::QAR2(A),XP(g)
- Tries
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- R(a);::S(H)
- P(g);OGATEB::QAR2(A),XP(g)
- B(e);::S(H)
- Refutation
- R(a);XP(E)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- P(g);::QAB1(A)
- B(b);::QAB1(A)
- S(k);::QAB1(A)
- Refutation
- R(a);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(k);::QAB1(A)
- Refutation
- R(a);XQ(A)
- Try
- Q(A);P_PINP(g)
- Threat
- QAB1(A)
- Vars
- B(b);N_GUARD::QAB1(A)
- Refutation
- R(a);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- P(g);::QAB1(A)
- B(b);::QAB1(A)
- S(k);::QAB1(A)
- Refutation
- R(a);
- Try
- Actual
- P(E);
- Vars
- R(a);N_GUARD,XP(C)::P=Q
- R(a);N_GUARD,XP(E)::QAB(A)
- P(g);OGATEB::QAR2(A),XP(g)
- R(a);N_GUARD::P=Q
- R(a);N_GUARD::QAB(A)
- B(b);N_GUARD::QAB1(A)
- B(b);S_CUTR(a)::P=Q
- B(b);N_GUARD::QAB1(A),XB(b)
- B(e);S_CUTR(a)::P=Q
- B(e);SBLOCK::S(H)
- S(i);N_GUARD::QAR2(A),XS(i)
- S(i);N_GUARD::QAB(A),XS(i)
- S(k);N_GUARD,S_CUTB(e),S_CUTR(a)::QAR2(A)
- S(k);SBLOCK::S(H)
- S(k);OGATE::PXS(k)=S
- P(d);S_CUTR(a)::QAB(A)
- P(f);N_GUARD::QAB(A)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).