MESON Chess Problem Database
Problem Display
PID: 11963 (1N3bR1/1pK1kP1n/2p2Rp1/2p1P2b/n6N/BB1P1P2/3Q4/8 w - - 0 1)
Boudantsev, Alex
The Problemist, 1973
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Bxf3
- 2.Sxg6#
- 1...Bg4
- 2.Sxg6#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...Sb2
- 2.Bxc5#
- 1...Sc3
- 2.Bxc5#
- 1...Sb6
- 2.Bxc5#
- 1...g5
- 2.Sf5#
- 1...b5
- 2.Sxc6#
- 1...b6
- 2.Sxc6#
- 1...Bxf3
- Tries
- 1.Bxa4?
- threat
- 2.Bxc5#
- 1...b6
- 2.Sxc6#
- 1...Sxf6!
- threat
- 1.Rf4?
- 1...Bxf3
- 2.Sxg6#
- 1...Bg4
- 2.Sxg6#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...Sb2
- 2.Bxc5#
- 1...Sc3
- 2.Bxc5#
- 1...Sb6
- 2.Bxc5#
- 1...Sf6
- 2.exf6#
- 1...g5
- 2.Sf5#
- 1...b5
- 2.Sxc6#
- 1...b6
- 2.Sxc6#
- 1...Sg5!
- 1...Bxf3
- 1.Rf5?
- 1...Bxf3
- 2.Sxg6#
- 1...gxf5
- 2.Sxf5#
- 1...Sg5
- 2.Qxg5#
- 1...Bg4
- 2.Sxg6#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...Sb2
- 2.Bxc5#
- 1...Sc3
- 2.Bxc5#
- 1...Sb6
- 2.Bxc5#
- 1...Sf6
- 2.exf6#
- 1...b5
- 2.Sxc6#
- 1...b6
- 2.Sxc6#
- 1...g5!
- 1...Bxf3
- 1.Rfxg6?
- threat
- 2.Sf5#
- 1...Bxg6
- 2.Sxg6#
- 1...Bg4!
- threat
- 1.Qc3?
- 1...Bxf3
- 2.Sxg6#
- 1...Sxc3
- 2.Bxc5#
- 1...Sxf6
- 2.exf6#
- 1...Bg4
- 2.Sxg6#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...Sb2
- 2.Bxc5#
- 2.Qxc5#
- 1...Sb6
- 2.Bxc5#
- 2.Qxc5#
- 1...g5
- 2.Sf5#
- 1...b5
- 2.Sxc6#
- 1...b6
- 2.Sxc6#
- 1...Sg5!
- 1...Bxf3
- 1.Qf4?
- threat
- 2.Re6#
- 1...Sxf6
- 2.Qxf6#
- 2.exf6#
- 1...Bg4
- 2.Sxg6#
- 1...Sg5!
- threat
- 1.Qg5?
- 1...Bxf3
- 2.Sxg6#
- 1...Sxf6
- 2.Qxf6#
- 2.exf6#
- 1...Bg4
- 2.Sxg6#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...Sb2
- 2.Bxc5#
- 1...Sc3
- 2.Bxc5#
- 1...Sb6
- 2.Bxc5#
- 1...b5
- 2.Sxc6#
- 1...b6
- 2.Sxc6#
- 1...Sxg5!
- 1...Bxf3
- 1.Qb2?
- 1...Bxf3
- 2.Sxg6#
- 1...Sxb2
- 2.Bxc5#
- 1...Sxf6
- 2.exf6#
- 1...Bg4
- 2.Sxg6#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...Sc3
- 2.Bxc5#
- 1...Sb6
- 2.Bxc5#
- 1...g5
- 2.Sf5#
- 1...b5
- 2.Sxc6#
- 1...b6
- 2.Sxc6#
- 1...Sg5!
- 1...Bxf3
- 1.Bxa4?
- Keys
- 1.Qh6!
- 1...Bxf3
- 2.Sxg6#
- 1...Bxh6
- 2.Re8#
- 1...Sxf6
- 2.Qxf8#
- 1...Sg5
- 2.Qxf8#
- 1...Bg4
- 2.Sxg6#
- 1...Bg7
- 2.Re8#
- 1...Sb2
- 2.Bxc5#
- 1...Sc3
- 2.Bxc5#
- 1...Sb6
- 2.Bxc5#
- 1...g5
- 2.Sf5#
- 1...b5
- 2.Sxc6#
- 1...b6
- 2.Sxc6#
- 1...Bxf3
- 1.Qh6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(c);N_GUARD,XP(E)::S(F),XP(e)
- B(c);N_GUARD::S(F),XP(e)
- B(i);OGATE::R1(L)
- S(a);N_GUARD::B(B),XP(b)
- P(e);N_GUARD::S(F)
- P(f);N_GUARD::S(K),XP(d)
- Tries
- Try
- B(C);XS(a)
- Threat
- B(B),XP(b)
- Vars
- P(f);N_GUARD::S(K),XP(d)
- Refutation
- S(h);XR(H)
- Try
- R(H);
- Vars
- B(c);N_GUARD,XP(E)::S(F),XP(e)
- B(c);N_GUARD::S(F),XP(e)
- B(i);OGATE::R1(L)
- S(a);N_GUARD::B(B),XP(b)
- S(h);OGATE::P(G),XS(h)
- P(e);N_GUARD::S(F)
- P(f);N_GUARD::S(K),XP(d)
- Refutation
- S(h);
- Try
- R(H);
- Vars
- B(c);N_GUARD,XP(E)::S(F),XP(e)
- P(e);XR(H)::S(F),XP(e)
- S(h);N_GUARD::QAB(A),XS(h)
- B(c);N_GUARD::S(F),XP(e)
- B(i);OGATE::R1(L)
- S(a);N_GUARD::B(B),XP(b)
- S(h);OGATE::P(G),XS(h)
- P(f);N_GUARD::S(K),XP(d)
- Refutation
- P(e);
- Try
- R(H);XP(e)
- Threat
- S(F)
- Vars
- B(c);XR(H)::S(F),XB(c)
- Refutation
- B(c);
- Try
- Q(A);
- Vars
- B(c);N_GUARD,XP(E)::S(F),XP(e)
- S(a);N_GUARD,XQ(A)::B(B),XP(b)
- S(h);OGATE,XR(H)::P(G),XS(h)
- B(c);N_GUARD::S(F),XP(e)
- B(i);OGATE::R1(L)
- P(e);N_GUARD::S(F)
- P(f);N_GUARD::S(K),XP(d)
- Refutation
- S(h);
- Try
- Q(A);
- Threat
- R1(H)
- Vars
- B(c);N_GUARD::S(F),XP(e)
- Refutation
- S(h);
- Try
- Q(A);
- Vars
- B(c);N_GUARD,XP(E)::S(F),XP(e)
- B(c);N_GUARD::S(F),XP(e)
- B(i);OGATE::R1(L)
- S(a);N_GUARD::B(B),XP(b)
- P(f);N_GUARD::S(K),XP(d)
- Refutation
- S(h);XQ(A)
- Try
- Q(A);
- Vars
- B(c);N_GUARD,XP(E)::S(F),XP(e)
- S(a);N_GUARD,XQ(A)::B(B),XP(b)
- S(h);OGATE,XR(H)::P(G),XS(h)
- B(c);N_GUARD::S(F),XP(e)
- B(i);OGATE::R1(L)
- S(a);N_GUARD::B(B),XP(b)
- P(e);N_GUARD::S(F)
- P(f);N_GUARD::S(K),XP(d)
- Refutation
- S(h);
- Try
- Actual
- Q(A);
- Vars
- B(c);N_GUARD,XP(E)::S(F),XP(e)
- B(i);OGATE,XQ(A)::R1(L)
- S(h);N_GUARD,XR(H)::QAB1(A),XB(i)
- S(h);N_GUARD::QAB1(A),XB(i)
- B(c);N_GUARD::S(F),XP(e)
- B(i);OGATE::R1(L)
- S(a);N_GUARD::B(B),XP(b)
- P(e);N_GUARD::S(F)
- P(f);N_GUARD::S(K),XP(d)
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).