MESON Chess Problem Database
Problem Display
PID: 134791 (n2B2K1/n2P2R1/4k1p1/1N4Rp/2bp1P2/8/6Q1/2brq2r w - - 0 1)
Shire, David J
The Problemist Supplement, 2009
#2
8 + 11
SOLUTION
- SOUND
- Sets
- 1...Qd2
- 2.Re5#
- 2.Qe4#
- 1...Qf2
- 2.Re5#
- 2.Qe4#
- 1...Qc3
- 2.Re5#
- 2.Qe4#
- 1...Qg3
- 2.Re5#
- 2.Qe4#
- 1...Qb4
- 2.Re5#
- 2.Qe4#
- 1...Qh4
- 2.Re5#
- 2.Qe4#
- 1...Qa5
- 2.Re5#
- 2.Qe4#
- 1...Qf1
- 2.Re5#
- 2.Qe4#
- 1...Qg1
- 2.Re5#
- 2.Qe4#
- 1...Qe4
- 2.Qxe4#
- 1...Qe5
- 2.Rxe5#
- 1...Rf1
- 2.Qh3#
- 1...Rh3
- 2.Qxh3#
- 1...Be3
- 2.Re5#
- 2.Qe4#
- 1...Bf1
- 2.Qd5#
- 1...Ba2
- 2.Qxa2#
- 1...Be2
- 2.Re5#
- 2.Qe4#
- 2.Qd5#
- 1...Bd3
- 2.Qd5#
- 1...Bxb5
- 2.Qd5#
- 1...Bd5
- 2.Qxd5#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.dxc8Q#
- 2.dxc8B#
- 1...h4
- 2.Qg4#
- 1...Qd2
- Tries
- 1.Rc5?
- threat
- 2.Qxg6#
- 1...Qe5
- 2.Rxe5#
- 1...Qg3
- 2.Re5#
- 2.Qe4#
- 1...Qh4
- 2.Re5#
- 2.Qe4#
- 1...Qg1
- 2.Re5#
- 2.Qe4#
- 1...Qe4
- 2.Qxe4#
- 1...Bd3
- 2.Qd5#
- 1...g5
- 2.f5#
- 1...Rg1!
- threat
- 1.Rf7?
- threat
- 2.Rxg6#
- 1...Qg3
- 2.Re5#
- 2.Qe4#
- 1...Qh4
- 2.Re5#
- 2.Qe4#
- 1...Qe4
- 2.Qxe4#
- 1...Qe5
- 2.Rxe5#
- 1...Bd3
- 2.Qd5#
- 1...Bxf4!
- threat
- 1.Qb7?
- threat
- 2.R7xg6#
- 1...Qe4
- 2.Qxe4#
- 1...Qe5
- 2.Rxe5#
- 1...Bd3
- 2.Qd5#
- 1...Sc7!
- threat
- 1.Qc2?
- threat
- 2.Qxg6#
- 2.Qxc4#
- 1...Bxb5
- 2.Qxg6#
- 1...Sxb5
- 2.Qxg6#
- 1...Qe5
- 2.Rxe5#
- 1...Qc3
- 2.Re5#
- 2.Qe4#
- 2.Qxg6#
- 1...Qb4
- 2.Re5#
- 2.Qe4#
- 2.Qxg6#
- 1...Qf1
- 2.Re5#
- 2.Qe4#
- 2.Qxg6#
- 1...Qe2
- 2.Qxg6#
- 1...Qe4
- 2.Qxe4#
- 1...Rd3
- 2.Qxc4#
- 1...Bf1
- 2.Qxg6#
- 1...Ba2
- 2.Qxg6#
- 2.Qxa2#
- 1...Be2
- 2.Re5#
- 2.Qe4#
- 2.Qxg6#
- 1...Bb3
- 2.Qxb3#
- 2.Qxg6#
- 1...Bd5
- 2.R5xg6#
- 2.Qxg6#
- 1...Sb6
- 2.Qxg6#
- 1...Sc7
- 2.Qxg6#
- 1...d3
- 2.Qxc4#
- 1...Bd3!
- threat
- 1.Qe2+?
- 1...Be3
- 2.Re5#
- 2.Qxc4#
- 1...Bxe2
- 2.Re5#
- 1...Qxe2!
- 1...Be3
- 1.Rc5?
- Keys
- 1.Rd5!
- threat
- 2.Rxg6#
- 1...Bxd5
- 2.Qxg6#
- 1...Qe4
- 2.Qxe4#
- 1...Qe5
- 2.Rxe5#
- 1...Qg3
- 2.Re5#
- 2.Qe4#
- 1...Qh4
- 2.Re5#
- 2.Qe4#
- 1...Bd3
- 2.Sxd4#
- 1...g5
- 2.Rg6#
- 2.f5#
- threat
- 1.Rd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 7
- Sets
- Q(c);N_GUARD::QAR2(A),XQ(c)
- Q(c);N_GUARD::R1(D),XQ(c)
- R(d);N_GUARD::QAB(A)
- R(d);N_GUARD::QAB(A),XR(d)
- B(e);N_GUARD::QAB1(A)
- B(e);OGATEB::QAB(A),XB(e)
- B(e);N_GUARD,XS(C)::QAB1(A)
- B(e);N_GUARD::QAB1(A),XB(e)
- S(j);N_GUARD::QAR2(A),XS(j)
- S(j);OGATE::PXS(j)=Q
- P(g);N_GUARD::QAB(A)
- Tries
- Try
- R(D);
- Threat
- QAR2(A),XP(i)
- Vars
- Q(c);N_GUARD::R1(D),XQ(c)
- Q(c);N_GUARD::QAR2(A),XQ(c)
- B(e);N_GUARD::QAB1(A)
- P(i);N_GUARD::P(B)
- Refutation
- R(d);
- Try
- R(F);
- Threat
- R(D),XP(i)
- Vars
- Q(c);N_GUARD::QAR2(A),XQ(c)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(e);N_GUARD::QAB1(A)
- Refutation
- B(a);XP(B)
- Try
- Q(A);
- Threat
- R(F),XP(i)
- Vars
- Q(c);N_GUARD::QAR2(A),XQ(c)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(e);N_GUARD::QAB1(A)
- Refutation
- S(k);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(e);XS(C)::QAR2(A),XP(i)
- S(j);XS(C)::QAR2(A),XP(i)
- Q(c);N_GUARD::R1(D),XQ(c)
- Q(c);::QAR2(A),XP(i)
- Q(c);N_GUARD::QAR2(A),XQ(c)
- R(b);::QAB(A),XB(e)
- B(e);::QAR2(A),XP(i)
- S(k);::QAR2(A),XP(i)
- P(f);::QAB(A),XB(e)
- Refutation
- B(e);
- Try
- Q(A);CHECK
- Vars
- B(e);XQ(A)::R1(D)
- Refutation
- Q(c);XQ(A)
- Try
- Actual
- R(D);
- Threat
- R(F),XP(i)
- Vars
- B(e);SBLOCK,XR(D)::QAR2(A),XP(i)
- Q(c);N_GUARD::QAR2(A),XQ(c)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(e);S_CUTR(b)::S(C),XP(f)
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).