MESON Chess Problem Database
Problem Display
PID: 132202 (4n3/1B5Q/4pPN1/b2b1NK1/4kB2/2Pp1p2/3Pp3/1R5n w - - 0 1)
Casa, Alex
Stella Polaris, 1972
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Bb4
- 2.Rxb4#
- 1...Bc7
- 2.Rb4#
- 1...Bd8
- 2.Rb4#
- 1...Bc6
- 2.Bxc6#
- 1...Bxb7
- 2.Qxb7#
- 1...Sf2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sd6
- 2.Sxd6#
- 1...Sxf6
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...e1Q
- 2.Rxe1#
- 1...e1S
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...e1R
- 2.Rxe1#
- 1...f2
- 2.Qxh1#
- 1...exf5
- 2.Qe7#
- 1...Bb4
- Tries
- 1.Sgh4?
- threat
- 2.Se3#
- 2.Sg3#
- 2.Sd4#
- 2.Sd6#
- 2.Sh6#
- 2.Se7#
- 2.Sg7#
- 1...Bxb7
- 2.Se3#
- 2.Se7#
- 2.Qxb7#
- 1...Sxf6
- 2.Sg3#
- 2.Sd6#
- 1...exf5
- 2.Qxf5#
- 2.Qe7#
- 1...Bc6
- 2.Se3#
- 2.Se7#
- 2.Bxc6#
- 1...Sg3
- 2.Sxg3#
- 2.Sd6#
- 1...Sd6
- 2.Sg3#
- 2.Sxd6#
- 1...Sg7
- 2.Sg3#
- 2.Sd6#
- 2.Sxg7#
- 1...Bxc3!
- threat
- 1.Se5?
- threat
- 2.Se3#
- 2.Sg3#
- 2.Sd4#
- 2.Sh4#
- 2.Sd6#
- 2.Sh6#
- 2.Se7#
- 2.Sg7#
- 1...Bxb7
- 2.Se3#
- 2.Se7#
- 2.Qxb7#
- 1...Sxf6
- 2.Sg3#
- 2.Sd6#
- 1...exf5
- 2.Qxf5#
- 1...Bc6
- 2.Se3#
- 2.Se7#
- 2.Bxc6#
- 1...Sg3
- 2.Sxg3#
- 2.Sd6#
- 1...Sd6
- 2.Sg3#
- 2.Sxd6#
- 1...Sg7
- 2.Sg3#
- 2.Sd6#
- 2.Sxg7#
- 1...Bxc3!
- threat
- 1.Sge7?
- threat
- 2.Se3#
- 2.Sg3#
- 2.Sd4#
- 2.Sh4#
- 2.Sd6#
- 2.Sh6#
- 2.Sg7#
- 1...Sxf6
- 2.Sg3#
- 2.Sd6#
- 1...exf5
- 2.Bxd5#
- 2.Qxf5#
- 1...f2
- 2.Sd4#
- 2.Sh4#
- 2.Qxh1#
- 1...Sg3
- 2.Sxg3#
- 2.Sd6#
- 1...Sd6
- 2.Sg3#
- 2.Sxd6#
- 1...Sg7
- 2.Sg3#
- 2.Sd6#
- 2.Sxg7#
- 1...Bxc3!
- threat
- 1.Sf8?
- threat
- 2.Se3#
- 2.Sg3#
- 2.Sd4#
- 2.Sh4#
- 2.Sd6#
- 2.Sh6#
- 2.Se7#
- 2.Sg7#
- 1...Bxb7
- 2.Se3#
- 2.Se7#
- 2.Qxb7#
- 1...Sxf6
- 2.Sg3#
- 2.Sd6#
- 1...exf5
- 2.Qxf5#
- 2.Qe7#
- 1...Bc6
- 2.Se3#
- 2.Se7#
- 2.Bxc6#
- 1...f2
- 2.Sd4#
- 2.Sh4#
- 2.Qxh1#
- 1...Sg3
- 2.Sxg3#
- 2.Sd6#
- 1...Sd6
- 2.Sg3#
- 2.Sxd6#
- 1...Sg7
- 2.Sg3#
- 2.Sd6#
- 2.Sxg7#
- 1...Bxc3!
- threat
- 1.Sh8?
- threat
- 2.Se3#
- 2.Sg3#
- 2.Sd4#
- 2.Sh4#
- 2.Sd6#
- 2.Sh6#
- 2.Se7#
- 2.Sg7#
- 1...Bxb7
- 2.Se3#
- 2.Se7#
- 2.Qxb7#
- 1...Sxf6
- 2.Sg3#
- 2.Sd6#
- 1...exf5
- 2.Qxf5#
- 2.Qe7#
- 1...Bc6
- 2.Se3#
- 2.Se7#
- 2.Bxc6#
- 1...f2
- 2.Sd4#
- 2.Sh4#
- 2.Qxh1#
- 1...Sg3
- 2.Sxg3#
- 2.Sd6#
- 1...Sd6
- 2.Sg3#
- 2.Sxd6#
- 1...Sg7
- 2.Sg3#
- 2.Sd6#
- 2.Sxg7#
- 1...Bxc3!
- threat
- 1.Bh2?
- threat
- 2.Qh4#
- 1...Bxb7
- 2.Qxb7#
- 1...Sxf6
- 2.Sd6#
- 1...exf5
- 2.Qe7#
- 1...Bc6
- 2.Bxc6#
- 1...e1Q
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...Bc7
- 2.Rb4#
- 1...Sf2
- 2.Sg3#
- 1...f2!
- threat
- 1.Bg3?
- threat
- 2.Qh4#
- 1...Bxb7
- 2.Qxb7#
- 1...Sxf6
- 2.Sd6#
- 1...exf5
- 2.Qe7#
- 1...Bc6
- 2.Bxc6#
- 1...f2
- 2.Qxh1#
- 1...Bc7
- 2.Rb4#
- 1...Sf2!
- threat
- 1.Be5?
- threat
- 2.Qh4#
- 1...Bxb7
- 2.Qxb7#
- 1...Sxf6
- 2.Sd6#
- 1...Bc6
- 2.Bxc6#
- 1...f2
- 2.Qxh1#
- 1...e1Q
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...Sf2
- 2.Sg3#
- 1...exf5!
- threat
- 1.Bd6?
- threat
- 2.Qh4#
- 1...Bxb7
- 2.Qxb7#
- 1...exf5
- 2.Qe7#
- 1...Bc6
- 2.Bxc6#
- 1...f2
- 2.Qxh1#
- 1...e1Q
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...Sf2
- 2.Sg3#
- 1...Sxf6!
- threat
- 1.Bc7?
- threat
- 2.Qh4#
- 1...Bxc7
- 2.Rb4#
- 1...Sxf6
- 2.Sd6#
- 1...exf5
- 2.Qe7#
- 1...Bc6
- 2.Bxc6#
- 1...f2
- 2.Qxh1#
- 1...e1Q
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...Sf2
- 2.Sg3#
- 1...Bxb7!
- threat
- 1.Bxd5+?
- 1...exd5
- 2.Qe7#
- 1...Kxd5!
- 1...exd5
- 1.Sgh4?
- Keys
- 1.Bb8!
- threat
- 2.Qh4#
- 1...Bxb7
- 2.Qxb7#
- 1...Sxf6
- 2.Sd6#
- 1...exf5
- 2.Qe7#
- 1...Bc6
- 2.Bxc6#
- 1...f2
- 2.Qxh1#
- 1...e1Q
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...Bc7
- 2.Rb4#
- 1...Sf2
- 2.Sg3#
- threat
- 1.Bb8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 8
- Sets
- B(f);N_GUARD::R(A),XB(f)
- B(f);N_GUARD::R(A)
- B(f);N_GUARD,P_PINP(G)::R(A)
- B(g);OGATEB::B(I),XB(g)
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(J),XB(g)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD,XP(G)::S(E)
- S(i);N_GUARD::S(E)
- 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(d);OGATEB::QAB(J),XS(a)
- P(h);OGATEB,XS(E)::QAR(J)
- Tries
- Try
- S(H);
- Threat
- DUALS(7)
- Refutation
- B(f);XP(C)
- Try
- S(H);
- Threat
- DUALS(8)
- Vars
- P(h);OGATE,P_SPINP(h),XS(E)::QAB1(J),XP(h)
- Refutation
- B(f);XP(C)
- Try
- S(H);
- Threat
- DUALS(7)
- Refutation
- B(f);XP(C)
- Try
- S(H);
- Threat
- DUALS(8)
- Refutation
- B(f);XP(C)
- Try
- S(H);
- Threat
- DUALS(8)
- Refutation
- B(f);XP(C)
- Try
- B(D);
- Threat
- QAR(J)
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(J),XB(g)
- S(i);N_GUARD,XP(G)::S(E)
- P(h);OGATEB,XS(E)::QAR(J)
- B(g);OGATEB::B(I),XB(g)
- P(b);OGATEB::R(A),XQ(b)
- P(b);OGATEB::R(A),XB(b)
- B(f);N_GUARD::R(A)
- S(a);N_GUARD::S(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- QAR(J)
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(J),XB(g)
- S(i);N_GUARD,XP(G)::S(E)
- P(h);OGATEB,XS(E)::QAR(J)
- B(g);OGATEB::B(I),XB(g)
- P(d);OGATEB::QAB(J),XS(a)
- B(f);N_GUARD::R(A)
- Refutation
- S(a);
- Try
- B(D);
- Threat
- QAR(J)
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(J),XB(g)
- S(i);N_GUARD,XP(G)::S(E)
- B(g);OGATEB::B(I),XB(g)
- P(d);OGATEB::QAB(J),XS(a)
- P(b);OGATEB::R(A),XQ(b)
- P(b);OGATEB::R(A),XB(b)
- S(a);N_GUARD::S(E)
- Refutation
- P(h);XS(E)
- Try
- B(D);
- Threat
- QAR(J)
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(J),XB(g)
- P(h);OGATEB,XS(E)::QAR(J)
- B(g);OGATEB::B(I),XB(g)
- P(d);OGATEB::QAB(J),XS(a)
- P(b);OGATEB::R(A),XQ(b)
- P(b);OGATEB::R(A),XB(b)
- S(a);N_GUARD::S(E)
- Refutation
- S(i);XP(G)
- Try
- B(D);
- Threat
- QAR(J)
- Vars
- B(f);N_GUARD,XB(D)::R(A)
- S(i);N_GUARD,XP(G)::S(E)
- P(h);OGATEB,XS(E)::QAR(J)
- B(g);OGATEB::B(I),XB(g)
- P(d);OGATEB::QAB(J),XS(a)
- P(b);OGATEB::R(A),XQ(b)
- P(b);OGATEB::R(A),XB(b)
- S(a);N_GUARD::S(E)
- Refutation
- B(g);N_SPINB(g),XB(I)
- Try
- B(I);CHECK,XB(g)
- Vars
- P(h);SBLOCK,XB(I)::QAR(J)
- Refutation
- K(e);S_FLIGHT,XB(I)
- Try
- Actual
- B(D);
- Threat
- QAR(J)
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(J),XB(g)
- S(i);N_GUARD,XP(G)::S(E)
- P(h);OGATEB,XS(E)::QAR(J)
- B(g);OGATEB::B(I),XB(g)
- P(d);OGATEB::QAB(J),XS(a)
- P(b);OGATEB::R(A),XQ(b)
- P(b);OGATEB::R(A),XB(b)
- B(f);N_GUARD::R(A)
- S(a);N_GUARD::S(E)
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).