MESON Chess Problem Database
Problem Display
PID: 996 (8/1b1Np3/1B3p2/5RP1/1p2k1Kb/3p4/p1PpN2p/1n1Q2n1 w - - 0 1)
Emmerson, Stephen
Stephenson, Brian D
The Problemist Supplement, 1996
#2
8 + 12
SOLUTION
- SOUND
- Sets
- 1...Bg3
- 2.Sxg3#
- 1...Bxg5
- 2.Sg3#
- 1...Bd5
- 2.Rf4#
- 1...Sxe2
- 2.Qh1#
- 1...Sh3
- 2.Qh1#
- 1...dxc2
- 2.Qxc2#
- 1...fxg5
- 2.Re5#
- 1...e5
- 2.Sxf6#
- 1...e6
- 2.Sxf6#
- 1...Bg3
- Tries
- 1.Sf4?
- threat
- 2.cxd3#
- 1...dxc2
- 2.Qxc2#
- 1...Ba6!
- threat
- 1.Bf2?
- threat
- 2.Sc5#
- 1...e5
- 2.Sxf6#
- 1...Bxf2!
- threat
- 1.Qxd2?
- threat
- 2.Sc5#
- 2.Qe3#
- 2.Qxb4#
- 2.Qf4#
- 2.Qxd3#
- 2.cxd3#
- 1...Bxg5
- 2.Sg3#
- 2.Sc5#
- 2.Qxb4#
- 2.Qxd3#
- 2.cxd3#
- 1...Sxe2
- 2.Qe3#
- 2.Qxd3#
- 2.cxd3#
- 1...dxc2
- 2.Sc5#
- 2.Rf4#
- 2.Qe3#
- 2.Qxc2#
- 2.Qd4#
- 1...dxe2
- 2.Sc5#
- 2.Rf4#
- 2.Qe3#
- 2.Qxb4#
- 2.Qf4#
- 2.Qd3#
- 2.Qd4#
- 1...fxg5
- 2.Sc5#
- 2.Re5#
- 2.Qe3#
- 2.Qxb4#
- 2.Qxd3#
- 2.cxd3#
- 1...e5
- 2.Sxf6#
- 2.Qxd3#
- 1...a1Q
- 2.Sc5#
- 2.Qe3#
- 2.Qf4#
- 2.Qxd3#
- 2.cxd3#
- 1...a1B
- 2.Sc5#
- 2.Qe3#
- 2.Qf4#
- 2.Qxd3#
- 2.cxd3#
- 1...Ba6
- 2.Sc5#
- 2.Qe3#
- 2.Qf4#
- 1...Be1
- 2.Sc5#
- 2.Qe3#
- 2.Qf4#
- 2.Qxd3#
- 2.cxd3#
- 1...Bf2
- 2.Qf4#
- 2.Qxd3#
- 2.cxd3#
- 1...Bg3
- 2.Sxg3#
- 2.Sc5#
- 2.Qe3#
- 2.Qxb4#
- 2.Qxd3#
- 2.cxd3#
- 1...Bd5
- 2.Sc5#
- 2.Rf4#
- 2.Qe3#
- 2.Qf4#
- 2.Qxd3#
- 2.cxd3#
- 1...Sa3
- 2.Sc5#
- 2.Qe3#
- 2.Qf4#
- 2.Qxd3#
- 2.cxd3#
- 1...Sc3
- 2.Sc5#
- 2.Qe3#
- 2.Qf4#
- 2.Qxd3#
- 2.cxd3#
- 1...Sf3
- 2.Sc5#
- 2.Qe3#
- 2.Qf4#
- 2.Qxd3#
- 2.cxd3#
- 1...Sh3
- 2.Sc5#
- 2.Qe3#
- 2.Qxb4#
- 2.Qxd3#
- 2.cxd3#
- 1...b3
- 2.Sc5#
- 2.Qe3#
- 2.Qb4#
- 2.Qf4#
- 2.Qxd3#
- 2.cxd3#
- 1...Sxd2!
- threat
- 1.Sf4?
- Keys
- 1.c4!
- threat
- 2.Rf4#
- 1...Bxg5
- 2.Sg3#
- 1...Sxe2
- 2.Qh1#
- 1...dxe2
- 2.Qc2#
- 1...fxg5
- 2.Re5#
- 1...bxc4 ep
- 2.Qa4#
- 1...Bg3
- 2.Sxg3#
- 1...Sh3
- 2.Qh1#
- 1...e5
- 2.Sxf6#
- threat
- 1.c4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- B(i);N_GUARD::S(C),XB(i)
- B(i);N_GUARD,XP(F)::S(C)
- B(k);SBLOCK::R1(E)
- S(b);OGATE,XS(C)::QAB(A)
- S(b);OGATE::QAB(A)
- P(f);OGATE,XP(B)::QAB(A),XP(f)
- P(j);N_GUARD,XP(F)::R1(E)
- P(l);N_GUARD::S(H),XP(j)
- Tries
- Try
- S(C);
- Threat
- P(B),XP(f)
- Vars
- P(f);OGATE,XP(B)::QAB(A),XP(f)
- Refutation
- B(k);
- Try
- B(G);
- Threat
- S(H)
- Vars
- P(l);N_GUARD::S(H),XP(j)
- Refutation
- B(i);XB(G)
- Try
- Q(A);XP(d)
- Threat
- DUALS(6)
- Refutation
- S(a);XQ(A)
- Try
- Actual
- P(B);
- Threat
- R1(E)
- Vars
- B(i);N_GUARD,XP(F)::S(C)
- S(b);OGATE,XS(C)::QAB(A)
- P(f);OGATEB,XS(C)::QAB(A)
- P(j);N_GUARD,XP(F)::R1(E)
- P(g);EP,OGATEB,XP(B)::QAR(A)
- B(i);N_GUARD::S(C),XB(i)
- S(b);OGATE::QAB(A)
- P(l);N_GUARD::S(H),XP(j)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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