MESON Chess Problem Database
Problem Display
PID: 11751 (b4q1Q/2PR1NB1/3b2Rp/1B1krn1N/1P6/2PP2pK/6n1/8 w - - 0 1)
Brown, David Leo
Schach-Echo, 1971
#2
12 + 9
| 17108 | White and Black From Brown (David L Brown) | 1995 |
SOLUTION
- SOUND
- Sets
- 1...Qe7
- 2.Qxa8#
- 1...Qxg7
- 2.Qxa8#
- 1...Qxf7
- 2.Qxa8#
- 1...Re1
- 2.c4#
- 1...Re2
- 2.c4#
- 1...Re3
- 2.c4#
- 1...Re6
- 2.c4#
- 1...Re7
- 2.c4#
- 1...Re8
- 2.c4#
- 1...Bc6
- 2.Bc4#
- 1...Se1
- 2.Sf4#
- 1...Sge3
- 2.Sf4#
- 1...Sf4+
- 2.Sxf4#
- 1...Sgh4
- 2.Sf4#
- 1...Sd4
- 2.c4#
- 1...Se7
- 2.Rgxd6#
- 2.Rdxd6#
- 1...Qe7
- Tries
- 1.Bxe5?
- threat
- 2.c4#
- 1...Sf4+
- 2.Sxf4#
- 1...Sge3
- 2.Sf4#
- 1...Sfe3!
- threat
- 1.Bxf8?
- threat
- 2.Qxe5#
- 1...Sf4+
- 2.Sxf4#
- 1...Re1
- 2.c4#
- 1...Re2
- 2.c4#
- 1...Re3
- 2.c4#
- 1...Re6
- 2.c4#
- 1...Re7
- 2.c4#
- 1...Re8
- 2.c4#
- 1...Sg7
- 2.Rgxd6#
- 2.Rdxd6#
- 1...Re4!
- threat
- 1.Qxf8?
- threat
- 2.Qxa8#
- 1...Sf4+
- 2.Sxf4#
- 1...Re8
- 2.c4#
- 1...Bc6
- 2.Bc4#
- 1...Sd4
- 2.Rgxd6#
- 2.Rdxd6#
- 2.Qxd6#
- 2.c4#
- 1...Se7
- 2.Rgxd6#
- 2.Rdxd6#
- 1...Bb7!
- threat
- 1.c8Q?
- threat
- 2.Bc4#
- 2.Qc4#
- 2.Qc5#
- 1...Sf4+
- 2.Sxf4#
- 1...Re4
- 2.Qc5#
- 1...Bc6
- 2.Bc4#
- 2.Bxc6#
- 2.Qxc6#
- 1...Sge3
- 2.Sf4#
- 2.Qc5#
- 1...Sfe3
- 2.Qc5#
- 1...Qxc8!
- threat
- 1.c8R?
- threat
- 2.Bc4#
- 2.Rc5#
- 1...Sf4+
- 2.Sxf4#
- 1...Re4
- 2.Rc5#
- 1...Bc6
- 2.Bc4#
- 2.Bxc6#
- 1...Sge3
- 2.Sf4#
- 2.Rc5#
- 1...Sfe3
- 2.Rc5#
- 1...Qxc8!
- threat
- 1.Bxe5?
- Keys
- 1.Re7!
- threat
- 2.Sf6#
- 1...Sf4+
- 2.Sxf4#
- 1...Qxe7
- 2.Qxa8#
- 1...Qxg7
- 2.Qxa8#
- 1...Qxf7
- 2.Qxa8#
- 1...Rxe7
- 2.c4#
- 1...Bxb4
- 2.Rxe5#
- 1...Bxe7
- 2.Bc4#
- 1...Sxe7
- 2.Rxd6#
- 1...Re6
- 2.c4#
- threat
- 1.Re7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 9
- Sets
- Q(i);OGATE::QAB(L),XB(h)
- Q(i);OGATE,XB(K)::QAB(L),XB(h)
- Q(i);OGATE,XS(J)::QAB(L),XB(h)
- R(d);::P(A)
- B(h);SBLOCK::B(E)
- S(a);N_GUARD::S(F)
- S(a);CHECK,N_GUARD::S(F),XS(a)
- S(e);SBLOCK::P(A)
- Tries
- Try
- B(K);XR(d)
- Threat
- P(A)
- Vars
- S(a);CHECK,N_GUARD::S(F),XS(a)
- S(a);N_GUARD::S(F)
- Refutation
- S(e);
- Try
- B(K);XQ(i)
- Threat
- QAR1(L),XR(d)
- Vars
- S(a);CHECK,N_GUARD::S(F),XS(a)
- R(d);::P(A)
- Refutation
- R(d);
- Try
- Q(L);XQ(i)
- Threat
- QAB(L),XB(h)
- Vars
- S(a);CHECK,N_GUARD::S(F),XS(a)
- R(d);::P(A)
- B(h);SBLOCK::B(E)
- Refutation
- B(h);
- Try
- P(H);
- Threat
- DUALS(3)
- Vars
- S(a);CHECK,N_GUARD::S(F),XS(a)
- R(d);::QAR1(H)
- S(e);::QAR1(H)
- Refutation
- Q(i);XQ(H)
- Try
- P(H);
- Threat
- DUALS(2)
- Vars
- S(a);CHECK,N_GUARD::S(F),XS(a)
- R(d);::R1(H)
- S(e);::R1(H)
- Refutation
- Q(i);XR(H)
- Try
- Actual
- R(I);N_PINB(f)
- Threat
- S(F)
- Vars
- S(a);CHECK,N_GUARD::S(F),XS(a)
- Q(i);OGATE,XR(I)::QAB(L),XB(h)
- Q(i);OGATE,XB(K)::QAB(L),XB(h)
- Q(i);OGATE,XS(J)::QAB(L),XB(h)
- R(d);XR(I)::P(A)
- B(f);N_GUARD,XP(D)::R1(I),XR(d)
- B(f);XR(I)::B(E)
- S(e);N_GUARD,XR(I)::R1(G),XB(f)
- R(d);::P(A)
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).