MESON Chess Problem Database
Problem Display
PID: 4821 (1n3Nnr/Q4B1p/2R5/1r2k3/1B3p1N/3P4/1b2p2K/R7 w - - 0 1)
Blake, Percy Francis
Bristol Mercury, 1892
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Rxb4
- 2.Qc5#
- 1...Ra5
- 2.Rxa5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Re6#
- 1...Rb7
- 2.Qc5#
- 1...Bxa1
- 2.Qxa1#
- 1...Bc1
- 2.Bc3#
- 1...Ba3
- 2.Bc3#
- 1...Bc3
- 2.Bxc3#
- 1...Bd4
- 2.Qc7#
- 1...Sa6
- 2.Sd7#
- 1...Sxc6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sf6
- 2.Bd6#
- 1...e1Q
- 2.Rxe1#
- 1...e1S
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...e1R
- 2.Rxe1#
- 1...f3
- 2.Qe3#
- 1...h5
- 2.Sfg6#
- 1...h6
- 2.Sfg6#
- 1...Rxb4
- Tries
- 1.Bc5?
- threat
- 2.Qc7#
- 1...Rxc5
- 2.Qxc5#
- 1...Sxc6
- 2.Sd7#
- 1...Sa6
- 2.Sd7#
- 1...Rb7!
- threat
- 1.Ba2?
- threat
- 2.Re6#
- 1...Sxc6
- 2.Sd7#
- 1...Rc5
- 2.Qxc5#
- 1...f3
- 2.Qe3#
- 1...Rb6!
- threat
- 1.Bb3?
- threat
- 2.Re6#
- 1...Sxc6
- 2.Sd7#
- 1...Rc5
- 2.Qxc5#
- 1...f3
- 2.Qe3#
- 1...Rb6!
- threat
- 1.Bc4?
- threat
- 2.Re6#
- 1...Sxc6
- 2.Sd7#
- 1...Rc5
- 2.Qxc5#
- 1...f3
- 2.Qe3#
- 1...Rb6!
- threat
- 1.Bxg8?
- threat
- 2.Qg7#
- 1...f3
- 2.Qe3#
- 1...Rb7
- 2.Qc5#
- 1...Sd7
- 2.Sxd7#
- 1...Rxg8!
- threat
- 1.Re1?
- threat
- 2.Rxe2#
- 1...Rxb4
- 2.Qc5#
- 1...Sxc6
- 2.Sd7#
- 1...Rc5
- 2.Qxc5#
- 1...f3
- 2.Qe3#
- 1...Bc1
- 2.Bc3#
- 1...Bd4
- 2.Qc7#
- 1...Sf6
- 2.Bd6#
- 1...Rb6!
- threat
- 1.Qd7?
- threat
- 2.Sf3#
- 2.Re6#
- 2.Qd6#
- 1...Sxc6
- 2.Qd6#
- 1...Rd5
- 2.Sf3#
- 2.Qxd5#
- 1...f3
- 2.Qd6#
- 1...e1S
- 2.Rxe1#
- 2.Re6#
- 2.Qd6#
- 1...Rb6
- 2.Sf3#
- 2.Qd5#
- 2.Qd6#
- 1...Sxd7!
- threat
- 1.Qe7+?
- 1...Kd4
- 2.Qe4#
- 1...Sxe7!
- 1...Kd4
- 1.Bc5?
- Keys
- 1.Qg1!
- 1...Rxb4
- 2.Qc5#
- 1...Bxa1
- 2.Qxa1#
- 1...Sxc6
- 2.Sd7#
- 1...f3
- 2.Qe3#
- 1...e1Q
- 2.Rxe1#
- 1...e1S
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...e1R
- 2.Rxe1#
- 1...Sh6
- 2.Qg7#
- 1...Ra5
- 2.Rxa5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Re6#
- 1...Rb6
- 2.Qc5#
- 1...Rb7
- 2.Qc5#
- 1...Bc1
- 2.Bc3#
- 1...Ba3
- 2.Bc3#
- 1...Bc3
- 2.Bxc3#
- 1...Bd4
- 2.Qg5#
- 1...Sa6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sf6
- 2.Bd6#
- 1...Se7
- 2.Qg7#
- 1...h5
- 2.Sfg6#
- 1...h6
- 2.Sfg6#
- 1...Rxb4
- 1.Qg1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(d);N_GUARD,XB(D)::QAR2(G)
- R(d);OGATEB::R(A),XR(d)
- R(d);N_GUARD::QAR2(G),XR(d)
- R(d);SBLOCK::R1(F)
- R(d);N_GUARD::QAR2(G)
- B(a);OGATE,XR(A)::QAB(G),XB(a)
- B(a);N_GUARD::B(D)
- B(a);N_GUARD::B(D),XB(a)
- B(a);SBLOCK::QAB(G)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD,XR(F)::S(I)
- S(g);N_GUARD::S(I),XS(g)
- S(h);SBLOCK::B(D)
- P(b);OGATEB::R(A),XQ(b)
- P(b);OGATEB::R(A),XS(b)
- P(b);OGATEB::R(A),XB(b)
- P(b);OGATEB::R(A),XR(b)
- P(c);N_GUARD::QAR2(G)
- P(f);N_GUARD::S(I)
- Tries
- Try
- B(D);
- Threat
- QAB(G)
- Vars
- R(d);OGATE,XB(D)::QAR2(G),XR(d)
- S(g);N_GUARD,XR(F)::S(I)
- S(g);N_GUARD::S(I)
- Refutation
- R(d);
- Try
- B(H);
- Threat
- R1(F)
- Vars
- S(g);N_GUARD,XR(F)::S(I)
- R(d);N_GUARD::QAR2(G),XR(d)
- P(c);N_GUARD::QAR2(G)
- Refutation
- R(d);
- Try
- B(H);
- Threat
- R1(F)
- Vars
- S(g);N_GUARD,XR(F)::S(I)
- R(d);N_GUARD::QAR2(G),XR(d)
- P(c);N_GUARD::QAR2(G)
- Refutation
- R(d);
- Try
- B(H);
- Threat
- R1(F)
- Vars
- S(g);N_GUARD,XR(F)::S(I)
- R(d);N_GUARD::QAR2(G),XR(d)
- P(c);N_GUARD::QAR2(G)
- Refutation
- R(d);
- Try
- B(H);XS(h)
- Threat
- QAB(G)
- Vars
- P(c);N_GUARD::QAR2(G)
- R(d);N_GUARD::QAR2(G)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- R(i);XB(H)
- Try
- R(A);P_PINP(b)
- Threat
- R(A),XP(b)
- Vars
- R(d);N_GUARD,XB(D)::QAR2(G)
- S(g);N_GUARD,XR(F)::S(I)
- R(d);N_GUARD::QAR2(G),XR(d)
- P(c);N_GUARD::QAR2(G)
- B(a);N_GUARD::B(D)
- B(a);SBLOCK::QAB(G)
- S(h);SBLOCK::B(D)
- Refutation
- R(d);
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- S(g);XR(F)::QAB1(G)
- P(c);::QAB1(G)
- Refutation
- S(g);XQ(G)
- Try
- Q(G);CHECK
- Vars
- K(e);OGATE,S_FLIGHT::QAR1(G)
- Refutation
- S(h);XQ(G)
- Try
- Actual
- Q(G);
- Vars
- R(d);N_GUARD,XB(D)::QAR2(G)
- B(a);OGATE,XR(A)::QAB(G),XB(a)
- S(g);N_GUARD,XR(F)::S(I)
- P(c);N_GUARD::QAR2(G)
- P(b);OGATEB::R(A),XQ(b)
- P(b);OGATEB::R(A),XS(b)
- P(b);OGATEB::R(A),XB(b)
- P(b);OGATEB::R(A),XR(b)
- S(h);N_GUARD::QAB(G)
- R(d);OGATEB::R(A),XR(d)
- R(d);N_GUARD::QAR2(G),XR(d)
- R(d);SBLOCK::R1(F)
- R(d);N_GUARD::QAR2(G)
- B(a);N_GUARD::B(D)
- B(a);N_GUARD::B(D),XB(a)
- B(a);SBLOCK::QAR2(G)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD::S(I),XS(g)
- S(h);SBLOCK::B(D)
- P(f);N_GUARD::S(I)
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).