MESON Chess Problem Database
Problem Display
PID: 271976 (4Nn1q/2B3p1/1R4P1/b1kBNQ2/2PpP3/n7/2b3PP/5K2 w - - 0 1)
Stevenson, Edward
The Problemist, 1957
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxh2
- 2.Qxf8#
- 1...Qh3
- 2.Qxf8#
- 1...Qh5
- 2.Qxf8#
- 1...Qh6
- 2.Qxf8#
- 1...Qh7
- 2.Qxf8#
- 1...Bd1
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3+
- 2.Sxd3#
- 1...Ba4
- 2.Sd3#
- 1...Bb4
- 2.Rc6#
- 1...Bxb6
- 2.Bd6#
- 1...Sb1
- 2.Rb5#
- 1...Sb5
- 2.Rxb5#
- 1...Se6
- 2.Sd7#
- 1...Sxg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...d3
- 2.Qf2#
- 1...Qxh2
- Tries
- 1.Sd6?
- threat
- 2.Sb7#
- 1...Bd3+
- 2.Sxd3#
- 1...Sb5
- 2.Rxb5#
- 1...d3
- 2.Qf2#
- 1...Bxb6!
- threat
- 1.Be6?
- threat
- 2.Sd3#
- 2.Sf3#
- 2.Sg4#
- 2.Sc6#
- 2.Sd7#
- 2.Sf7#
- 1...Bd3+
- 2.Sxd3#
- 1...Qxh2
- 2.Sd3#
- 2.Sd7#
- 2.Qxf8#
- 1...Bxe4
- 2.Sd3#
- 2.Sd7#
- 1...Bxb6
- 2.Bd6#
- 1...Sxc4
- 2.Sd3#
- 2.Sxc4#
- 2.Sd7#
- 1...Sxg6
- 2.Sd3#
- 2.Sxg6#
- 2.Sd7#
- 1...Sb5
- 2.Sd3#
- 2.Sc6#
- 2.Rxb5#
- 1...d3
- 2.Sf3#
- 2.Sc6#
- 2.Qf2#
- 1...Qh3
- 2.Sd3#
- 2.Sg4#
- 2.Sd7#
- 2.Qxf8#
- 1...Qh5
- 2.Sd3#
- 2.Sd7#
- 2.Qxf8#
- 1...Sd7
- 2.Sd3#
- 2.Sxd7#
- 1...Sxe6!
- threat
- 1.Bf7?
- threat
- 2.Sd3#
- 2.Sf3#
- 2.Sg4#
- 2.Sc6#
- 2.Sd7#
- 1...Bd3+
- 2.Sxd3#
- 1...Qxh2
- 2.Sd3#
- 2.Sd7#
- 1...Bxe4
- 2.Sd3#
- 2.Sd7#
- 1...Bxb6
- 2.Bd6#
- 1...Sxc4
- 2.Sd3#
- 2.Sxc4#
- 2.Sd7#
- 1...Sxg6
- 2.Sd3#
- 2.Sxg6#
- 2.Sd7#
- 1...Sb5
- 2.Sd3#
- 2.Sc6#
- 2.Rxb5#
- 1...d3
- 2.Sf3#
- 2.Sc6#
- 2.Qf2#
- 1...Qh3
- 2.Sd3#
- 2.Sg4#
- 2.Sd7#
- 1...Qh5
- 2.Sd3#
- 2.Sd7#
- 1...Sd7
- 2.Sd3#
- 2.Sxd7#
- 1...Se6!
- threat
- 1.Qe6?
- threat
- 2.Qc6#
- 2.Qd6#
- 2.Qe7#
- 1...Bd3+
- 2.Sxd3#
- 1...Bxb6
- 2.Bd6#
- 2.Qxb6#
- 2.Qd6#
- 2.Qe7#
- 1...Sxc4
- 2.Qc6#
- 1...Sxe6
- 2.Sd7#
- 1...Sxg6
- 2.Sd7#
- 2.Qc6#
- 2.Qd6#
- 1...Sb5
- 2.Rxb5#
- 1...Qh4
- 2.Qc6#
- 2.Qd6#
- 1...Ba4
- 2.Sd3#
- 2.Qd6#
- 2.Qe7#
- 1...d3!
- threat
- 1.Qd7?
- threat
- 2.Qc6#
- 2.Qd6#
- 2.Qe7#
- 1...Bd3+
- 2.Sxd3#
- 1...Bxb6
- 2.Bd6#
- 2.Qd6#
- 2.Qe7#
- 1...Sxc4
- 2.Rb5#
- 2.Qb5#
- 2.Qc6#
- 1...Sxg6
- 2.Qc6#
- 2.Qd6#
- 1...Sxd7
- 2.Sxd7#
- 1...Sb5
- 2.Rxb5#
- 2.Qxb5#
- 1...Qh4
- 2.Qc6#
- 2.Qd6#
- 1...Ba4
- 2.Sd3#
- 2.Qd6#
- 2.Qe7#
- 1...d3!
- threat
- 1.Qf6?
- threat
- 2.Qe7#
- 2.Qc6#
- 2.Qd6#
- 1...Bd3+
- 2.Sxd3#
- 1...Bxb6
- 2.Bd6#
- 2.Qe7#
- 2.Qxb6#
- 2.Qd6#
- 1...Sxc4
- 2.Qc6#
- 1...Sxg6
- 2.Sd7#
- 2.Qc6#
- 2.Qd6#
- 1...Sb5
- 2.Rxb5#
- 1...d3
- 2.Qf2#
- 1...Se6
- 2.Sd7#
- 2.Qe7#
- 1...Qh4
- 2.Qc6#
- 2.Qd6#
- 1...Ba4
- 2.Sd3#
- 2.Qe7#
- 2.Qd6#
- 1...gxf6!
- threat
- 1.Sd6?
- Keys
- 1.Bd8!
- threat
- 2.Qc8#
- 1...Bd3+
- 2.Sxd3#
- 1...Bxb6
- 2.Be7#
- 1...Sb5
- 2.Rxb5#
- 1...d3
- 2.Qf2#
- 1...Se6
- 2.Sd7#
- 1...Qh3
- 2.Qxf8#
- 1...Ba4
- 2.Sd3#
- 1...Sd7
- 2.Sxd7#
- threat
- 1.Bd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 10
- Sets
- Q(h);N_GUARD,XP(C)::QAB(H),XS(g)
- Q(h);N_GUARD,P_PINP(B)::QAB(H),XS(g)
- Q(h);N_GUARD::QAB(H),XS(g)
- B(a);N_GUARD::S(G)
- B(a);CHECK,N_GUARD::S(G),XB(a)
- B(d);SBLOCK::R1(I)
- B(d);SBLOCK,XR(I)::B(K)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(g);N_GUARD::S(G)
- S(g);N_GUARD,XP(J)::S(G)
- S(g);N_GUARD::S(G),XS(g)
- P(c);OGATEB::QAB(H)
- Tries
- Try
- S(L);
- Threat
- S(L)
- Vars
- B(a);CHECK,N_GUARD::S(G),XB(a)
- S(b);N_GUARD::R1(I),XS(b)
- P(c);OGATEB::QAB(H)
- Refutation
- B(d);XR(I)
- Try
- B(F);
- Threat
- DUALS(6)
- Vars
- B(a);CHECK::QAR(H)+S(G),DCHECK,XB(a)
- B(d);SBLOCK,XR(I)::B(K)
- Refutation
- S(g);XB(F)
- Try
- B(F);
- Threat
- DUALS(5)
- Vars
- B(a);CHECK::QAR(H)+S(G),DCHECK,XB(a)
- B(d);SBLOCK,XR(I)::B(K)
- Refutation
- S(g);
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- B(a);CHECK,N_GUARD::S(G),XB(a)
- S(b);XP(D)::QAR1(H)
- S(g);N_GUARD,XQ(H)::S(G)
- S(b);N_GUARD::R1(I),XS(b)
- Refutation
- P(c);
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- B(a);CHECK,N_GUARD::S(G),XB(a)
- S(g);XQ(H)::S(G),XS(g)
- Refutation
- P(c);
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- B(a);CHECK,N_GUARD::S(G),XB(a)
- S(b);XP(D)::QAR1(H)
- S(b);N_GUARD::R1(I),XS(b)
- P(c);OGATEB::QAB(H)
- Refutation
- P(f);XQ(H)
- Try
- Actual
- B(K);
- Threat
- QAR(H)
- Vars
- B(a);CHECK,N_GUARD::S(G),XB(a)
- B(d);SBLOCK,XR(I)::B(K)
- S(b);N_GUARD::R1(I),XS(b)
- P(c);OGATEB::QAB(H)
- S(g);N_GUARD::S(G)
- Q(h);N_GUARD,P_PINP(B)::QAB(H),XS(g)
- B(a);N_GUARD::S(G)
- S(g);N_GUARD::S(G),XS(g)
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).