MESON Chess Problem Database
Problem Display
PID: 51438 (1Q6/P3N1pp/2Bbp2R/2p1k3/5n2/1p1P1R2/2N3n1/K7 w - - 0 1)
Subrahmanyam, Swaminatha
The Guardian, 1960
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Bc7
- 2.Qxc7#
- 1...Bxb8
- 2.axb8Q#
- 2.axb8B#
- 1...Se1
- 2.Re3#
- 1...Se3
- 2.Rxe3#
- 1...Sh4
- 2.Re3#
- 1...Sg6
- 2.Rh5#
- 1...bxc2
- 2.Qb2#
- 1...b2+
- 2.Qxb2#
- 1...c4
- 2.d4#
- 1...gxh6
- 2.Qh8#
- 1...g5
- 2.Qh8#
- 1...g6
- 2.Qh8#
- 1...Bc7
- Tries
- 1.Be4?
- threat
- 2.Sc6#
- 1...b2+
- 2.Qxb2#
- 1...Bxb8
- 2.axb8Q#
- 2.axb8B#
- 1...gxh6
- 2.Qh8#
- 1...Bc7
- 2.Qxc7#
- 1...g6
- 2.Qh8#
- 1...Sxd3!
- threat
- 1.Bd7?
- 1...b2+
- 2.Qxb2#
- 1...Bxb8
- 2.axb8Q#
- 2.axb8B#
- 1...Sxd3
- 2.Rxe6#
- 1...bxc2
- 2.Qb2#
- 1...gxh6
- 2.Qh8#
- 1...Bc7
- 2.Qxc7#
- 1...g6
- 2.Qh8#
- 1...Se1
- 2.Re3#
- 1...Se3
- 2.Rxe3#
- 1...Sh4
- 2.Re3#
- 1...Se2
- 2.Rxe6#
- 1...Sh3
- 2.Rxe6#
- 1...Sd5
- 2.Sc6#
- 2.Rxe6#
- 1...Sh5
- 2.Rxe6#
- 1...Sg6
- 2.Rh5#
- 1...g5
- 2.Qh8#
- 1...c4!
- 1...b2+
- 1.Rh5+?
- 1...Kf6
- 2.Qf8#
- 1...g5
- 2.Qh8#
- 1...Sxh5!
- 1...Kf6
- 1.Rxe6+?
- 1...Sxe6
- 2.Rf5#
- 1...Kxe6!
- 1...Sxe6
- 1.Be4?
- Keys
- 1.Bd5!
- 1...b2+
- 2.Qxb2#
- 1...Bxb8
- 2.axb8Q#
- 2.axb8B#
- 1...Sxd3
- 2.Rxe6#
- 1...Sxd5
- 2.Sc6#
- 1...bxc2
- 2.Qb2#
- 1...exd5
- 2.Qxd6#
- 1...gxh6
- 2.Qh8#
- 1...Bc7
- 2.Qxc7#
- 1...g6
- 2.Qh8#
- 1...Se1
- 2.Re3#
- 1...Se3
- 2.Rxe3#
- 1...Sh4
- 2.Re3#
- 1...Se2
- 2.Rxe6#
- 1...Sh3
- 2.Rxe6#
- 1...Sh5
- 2.Rxe6#
- 1...Sg6
- 2.Rh5#
- 1...c4
- 2.d4#
- 1...g5
- 2.Qh8#
- 1...b2+
- 1.Bd5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- B(f);OGATEB::QAB(I),XB(f)
- B(f);N_SPINB(f),OGATE,XQ(I)::PXB(f)=Q
- S(a);N_GUARD::R(D)
- S(a);N_GUARD::R(D),XS(a)
- S(c);N_GUARD,S_CUTP(h)::R(F)
- P(b);OGATE,XS(B)::QAB(I)
- P(b);CHECK,OGATE::QAB(I),XP(b)
- P(d);N_GUARD::P(C)
- P(h);OGATEB,XR(F)::QAB(I)
- P(h);OGATEB::QAB(I)
- Tries
- Try
- B(E);
- Threat
- S(H)
- Vars
- P(b);CHECK,OGATE::QAB(I),XP(b)
- B(f);N_SPINB(f),OGATE,XQ(I)::PXB(f)=Q
- P(h);OGATEB,XR(F)::QAB(I)
- B(f);OGATEB::QAB(I),XB(f)
- P(h);OGATEB::QAB(I)
- Refutation
- S(c);XP(C)
- Try
- B(E);
- Vars
- P(b);CHECK,OGATE::QAB(I),XP(b)
- B(f);N_SPINB(f),OGATE,XQ(I)::PXB(f)=Q
- S(c);N_GUARD,XP(C)::R1(F),XP(g)
- P(b);OGATE,XS(B)::QAB(I)
- P(h);OGATEB,XR(F)::QAB(I)
- B(f);OGATEB::QAB(I),XB(f)
- P(h);OGATEB::QAB(I)
- S(a);N_GUARD::R(D)
- S(a);N_GUARD::R(D),XS(a)
- S(c);N_GUARD::R1(F),XP(g)
- S(c);N_GUARD,S_CUTP(h)::R(F)
- Refutation
- P(d);
- Try
- R(F);CHECK
- Vars
- K(e);N_SPINB(f),P_SPINS(c),S_FLIGHT::QAR2(I)
- P(h);P_SPINP(h),S_CUTS(c)::QAB(I)
- Refutation
- S(c);XR(F)
- Try
- R(F);CHECK,XP(g)
- Vars
- S(c);OGATE,SBLOCK,XR(F)::R1(D)
- Refutation
- K(e);N_SPINB(f),P-FLIGHT,XR(F)
- Try
- Actual
- B(E);
- Vars
- P(b);CHECK,OGATE::QAB(I),XP(b)
- B(f);N_SPINB(f),OGATE,XQ(I)::PXB(f)=Q
- S(c);N_GUARD,XP(C)::R1(F),XP(g)
- S(c);SBLOCK,XB(E)::S(H)
- P(b);OGATE,XS(B)::QAB(I)
- P(g);XB(E)::QAB1(I),XB(f)
- P(h);OGATEB,XR(F)::QAB(I)
- B(f);OGATEB::QAB(I),XB(f)
- P(h);OGATEB::QAB(I)
- S(a);N_GUARD::R(D)
- S(a);N_GUARD::R(D),XS(a)
- S(c);N_GUARD::R1(F),XP(g)
- S(c);N_GUARD,S_CUTP(h)::R(F)
- P(d);N_GUARD::P(C)
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).