MESON Chess Problem Database
Problem Display
PID: 158350 (8/1p1Q1bpP/1pPB4/1PPp4/R1rk1p1n/4Rp2/NK1P3N/n6B w - - 0 1)
Sag, Andy
British Chess Magazine, 2001
#2
13 + 11
SOLUTION
- SOUND
- Sets
- 1...Rb4+
- 2.Rxb4#
- 1...Bh5
- 2.Qxg7#
- 1...Be6
- 2.Qxg7#
- 1...Bg6
- 2.Qxg7#
- 1...Be8
- 2.Qxg7#
- 1...Bg8
- 2.Qxg7#
- 1...Sg2
- 2.Sxf3#
- 1...Sf5
- 2.Sxf3#
- 1...Sg6
- 2.Sxf3#
- 1...bxc5
- 2.Be5#
- 1...g5
- 2.h8Q#
- 2.h8B#
- 1...g6
- 2.h8Q#
- 2.h8B#
- 1...Rb4+
- Tries
- 1.Qg4?
- threat
- 2.Qxf4#
- 2.Qxg7#
- 1...Rb4+
- 2.Rxb4#
- 1...Rxa4
- 2.Qxf4#
- 1...Sg2
- 2.Sxf3#
- 2.Qxg7#
- 1...Sf5
- 2.Sxf3#
- 2.Qxf4#
- 1...Sg6
- 2.Sxf3#
- 1...g5
- 2.h8Q#
- 2.h8B#
- 1...g6
- 2.Qxf4#
- 2.h8Q#
- 2.h8B#
- 1...Bg6!
- threat
- 1.Qf5?
- threat
- 2.Rd3#
- 2.Qd3#
- 2.Qxf4#
- 2.Qe5#
- 1...Rb4+
- 2.Rxb4#
- 1...Rxa4
- 2.Qd3#
- 2.Qxf4#
- 1...Sxf5
- 2.Sxf3#
- 1...Bg6
- 2.Rd3#
- 2.Qe5#
- 1...Sg2
- 2.Sxf3#
- 2.Rd3#
- 2.Qd3#
- 2.Qe5#
- 1...Sg6
- 2.Sxf3#
- 2.Rd3#
- 2.Qd3#
- 1...g5
- 2.Rd3#
- 2.Qd3#
- 2.Qe5#
- 2.Qf6#
- 2.h8Q#
- 2.h8B#
- 1...fxe3!
- threat
- 1.Qe7?
- threat
- 2.Be5#
- 2.Qe5#
- 1...Rb4+
- 2.Rxb4#
- 1...fxe3
- 2.Qxe3#
- 1...Be6
- 2.Be5#
- 2.Qxg7#
- 1...Sg6
- 2.Sxf3#
- 1...Rxa4!
- threat
- 1.Qxf7?
- threat
- 2.Qxf4#
- 2.Qxg7#
- 1...Rb4+
- 2.Rxb4#
- 1...Rxa4
- 2.Qxf4#
- 1...Sg2
- 2.Sxf3#
- 2.Qxg7#
- 1...Sf5
- 2.Sxf3#
- 1...Sg6
- 2.Sxf3#
- 1...g5
- 2.Qf6#
- 2.Qg7#
- 2.h8Q#
- 2.h8B#
- 1...g6
- 2.Qxf4#
- 2.Qf6#
- 2.Qg7#
- 2.h8Q#
- 2.h8B#
- 1...fxe3!
- threat
- 1.Qg4?
- Keys
- 1.Sb4!
- 1...Rc2+
- 2.Sxc2#
- 1...Rxb4+
- 2.Rxb4#
- 1...Rxc5
- 2.Sc2#
- 1...fxe3
- 2.Qg4#
- 1...bxc5
- 2.Be5#
- 1...bxc6
- 2.Sxc6#
- 1...Rc1
- 2.Sc2#
- 1...Rc3
- 2.Sc2#
- 1...Bh5
- 2.Qxg7#
- 1...Be6
- 2.Qxg7#
- 1...Bg6
- 2.Qxg7#
- 1...Be8
- 2.Qxg7#
- 1...Bg8
- 2.Qxg7#
- 1...Sc2
- 2.Sxc2#
- 1...Sb3
- 2.Sc2#
- 1...Sg2
- 2.Sxf3#
- 1...Sf5
- 2.Sxf3#
- 1...Sg6
- 2.Sxf3#
- 1...f2
- 2.Rd3#
- 1...g5
- 2.h8Q#
- 2.h8B#
- 1...g6
- 2.h8Q#
- 2.h8B#
- 1...Rc2+
- 1.Sb4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 0
- Sets
- R(c);CHECK,OGATEB::R(G),XR(c)
- B(j);OGATE::QAB(L),XP(k)
- S(f);N_GUARD::S(E),XP(b)
- P(h);SBLOCK,XP(I)::B(K)
- P(k);::P=Q
- Tries
- Try
- Q(L);P_PINP(e)
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATEB::R(G),XR(c)
- R(c);N_SPINR(c),XR(G)::QAR2(L),XP(e)
- S(f);N_GUARD::S(E),XP(b)
- P(k);::P=Q
- Refutation
- B(j);
- Try
- Q(L);
- Threat
- DUALS(4)
- Vars
- R(c);CHECK,OGATEB::R(G),XR(c)
- S(f);N_GUARD,XQ(L)::S(E),XP(b)
- Refutation
- P(e);XR(F)
- Try
- Q(L);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATEB::R(G),XR(c)
- P(e);OGATE,XR(F)::QAB1(L),XP(e)
- S(f);N_GUARD::S(E),XP(b)
- Refutation
- R(c);N_SPINR(c),XR(G)
- Try
- Q(L);XB(j)
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATEB::R(G),XR(c)
- R(c);N_SPINR(c),XR(G)::QAR2(L),XP(e)
- S(f);N_GUARD::S(E),XP(b)
- Refutation
- P(e);XR(F)
- Try
- Actual
- S(B);N_PINR(c)
- Vars
- R(c);CHECK::R(G)+S(B),DCHECK,XR(c)
- R(c);CHECK,OGATE,P_SPINR(c),XS(B)::R(G),XR(c)
- R(c);XP(I)::R(G)+S(B),DCHECK
- P(e);OGATEB,XR(F)::QAR(L)
- P(h);SBLOCK,XP(I)::B(K)
- P(i);XP(J)::S(B),XP(i)
- R(c);::R(G)+S(B),DCHECK
- B(j);OGATE::QAB(L),XP(k)
- S(a);N_GUARD::S(B),XS(a)
- S(a);N_GUARD::S(B)
- S(f);N_GUARD::S(E),XP(b)
- P(b);::R1(F)
- P(k);::P=Q
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).