MESON Chess Problem Database
Problem Display
PID: 227419 (rn2kbK1/1R3pp1/4PB2/7N/8/7Q/q1n5/2R5 w - - 0 1)
Dowd, Steven B
Best Problems, 2020
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.exf7#
- 1...Qa1
- 2.exf7#
- 1...Qb2
- 2.exf7#
- 1...Qa3
- 2.exf7#
- 1...Qa4
- 2.exf7#
- 1...Qa5
- 2.exf7#
- 1...Qa6
- 2.exf7#
- 1...Qa7
- 2.exf7#
- 1...Ra3
- 2.Rxb8#
- 1...Ra4
- 2.Rxb8#
- 1...Ra5
- 2.Rxb8#
- 1...Ra6
- 2.Rxb8#
- 1...Ra7
- 2.Rxb8#
- 1...Ba3
- 2.Sxg7#
- 1...Bb4
- 2.Sxg7#
- 1...Bc5
- 2.Sxg7#
- 1...Bd6
- 2.Sxg7#
- 1...Sa1
- 2.Rc8#
- 1...Se1
- 2.Rc8#
- 1...Sa3
- 2.Rc8#
- 1...Se3
- 2.Rc8#
- 1...Sb4
- 2.Rc8#
- 1...Sd4
- 2.Rc8#
- 1...Sd7
- 2.exd7#
- 1...Qb1
- Tries
- 1.Qd3?
- threat
- 2.Qd8#
- 1...gxf6
- 2.Sxf6#
- 1...Qa5
- 2.exf7#
- 1...Bd6
- 2.Sxg7#
- 1...Be7
- 2.Sxg7#
- 2.Rxe7#
- 1...Sd4
- 2.Rc8#
- 1...Sa6
- 2.Qb5#
- 2.Qd7#
- 1...Sc6
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 2.exd7#
- 1...Qd5!
- threat
- 1.e7?
- threat
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...gxf6
- 2.Sxf6#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Qd5
- 2.exf8Q#
- 2.exf8R#
- 1...Qb1
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Qb3
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Qc4
- 2.exf8Q#
- 2.exf8R#
- 1...Qe6
- 2.exf8Q#
- 2.exf8R#
- 1...Qa1
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Qb2
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Qa3
- 2.Qc8#
- 1...Qa4
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Qa5
- 2.exf8Q#
- 2.exf8R#
- 1...Qa6
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Qa7
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Ra3
- 2.Rxb8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Ra4
- 2.Rxb8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Ra5
- 2.Rxb8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Ra6
- 2.Rxb8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Ra7
- 2.Rxb8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Sa1
- 2.Rc8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Se1
- 2.Rc8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Sa3
- 2.Rc8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Se3
- 2.Rc8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Sb4
- 2.Rc8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Sd4
- 2.Rc8#
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Sa6
- 2.Qd7#
- 2.exf8Q#
- 2.exf8R#
- 1...Sc6
- 2.Qd7#
- 2.exf8Q#
- 2.exf8R#
- 1...Sd7
- 2.Qxd7#
- 1...g5
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...g6
- 2.Qc8#
- 2.exf8Q#
- 2.exf8R#
- 1...Bxe7!
- threat
- 1.Qd3?
- Keys
- 1.Qa3!
- threat
- 2.Qxf8#
- 1...Qxa3
- 2.exf7#
- 1...Rxa3
- 2.Rxb8#
- 1...Bxa3
- 2.Sxg7#
- 1...Sxa3
- 2.Rc8#
- 1...Be7
- 2.Qxe7#
- 1...Bb4
- 2.Sxg7#
- 1...Bc5
- 2.Sxg7#
- 1...Bd6
- 2.Sxg7#
- 1...Sb4
- 2.Rc8#
- 1...Sd7
- 2.exd7#
- threat
- 1.Qa3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 15
- Sets
- Q(a);N_GUARD::P(D),XP(c)
- R(e);N_GUARD::R(F),XS(f)
- B(h);N_GUARD::S(C),XP(d)
- S(b);OGATE::R(A)
- S(f);OGATE::P(D),XS(f)
- Tries
- Try
- Q(B);
- Threat
- QAR1(B)
- Vars
- P(d);XB(E)::S(C),XP(d)
- Q(a);N_GUARD::P(D),XP(c)
- B(h);N_GUARD::S(C),XP(d)
- S(b);OGATE::R(A)
- S(f);N_GUARD::QAB1(B)
- Refutation
- Q(a);
- Try
- P(D);
- Threat
- DUALS(3)
- Vars
- Q(a);::PXB(h)=Q
- Q(a);::QAR2(B)
- S(f);N_GUARD::QAB1(B),XS(f)
- Refutation
- B(h);XP(D)
- Try
- Actual
- Q(B);
- Threat
- QAR1(B),XB(h)
- Vars
- Q(a);N_GUARD,XQ(B)::P(D),XP(c)
- R(e);N_GUARD,XQ(B)::R(F),XS(f)
- B(h);N_GUARD,XQ(B)::S(C),XP(d)
- S(b);OGATE,XQ(B)::R(A)
- B(h);N_GUARD::QAR1(B),XB(h)
- B(h);N_GUARD::S(C),XP(d)
- S(b);OGATE::R(A)
- S(f);OGATE::P(D),XS(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).