MESON Chess Problem Database
Problem Display
PID: 134502 (8/2B1p2K/2n1P1RP/3NPkb1/6r1/3P2pQ/4N1P1/5n2 w - - 0 1)
Langstaff, William A
The Field, 1965
(First published on Thu May 27 1965)
#2
11 + 7
SOLUTION
- SOUND
- Sets
- 1...Bc1
- 2.Qxg4#
- 1...Bd2
- 2.Qxg4#
- 1...Be3
- 2.Qxg4#
- 1...Bf4
- 2.Qxg4#
- 1...Bh4
- 2.Qxg4#
- 1...Bf6
- 2.Qxg4#
- 1...Bxh6
- 2.Qxg4#
- 1...Sd2
- 2.Sxg3#
- 1...Sh2
- 2.Sxg3#
- 1...Se3
- 2.Sxg3#
- 1...Sb4
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sxe5
- 2.Sd4#
- 1...Sa7
- 2.Sd4#
- 1...Sb8
- 2.Sd4#
- 1...Sd8
- 2.Sd4#
- 1...Bc1
- Tries
- 1.Se3+?
- 1...Bxe3
- 2.Qxg4#
- 1...Sxe3!
- 1...Bxe3
- 1.Sxe7+?
- 1...Bxe7
- 2.Qxg4#
- 1...Sxe7!
- 1...Bxe7
- 1.Bd6?
- 1...Bxh6
- 2.Qxg4#
- 1...Sxe5
- 2.Sd4#
- 1...Bf6
- 2.Qxg4#
- 1...Sd2
- 2.Sxg3#
- 1...Bc1
- 2.Qxg4#
- 1...Bd2
- 2.Qxg4#
- 1...Be3
- 2.Qxg4#
- 1...Bf4
- 2.Qxg4#
- 1...Bh4
- 2.Qxg4#
- 1...Sh2
- 2.Sxg3#
- 1...Se3
- 2.Sxg3#
- 1...Sb4
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sa7
- 2.Sd4#
- 1...Sb8
- 2.Sd4#
- 1...Sd8
- 2.Sd4#
- 1...exd6!
- 1...Bxh6
- 1.Bb8?
- 1...Bxh6
- 2.Qxg4#
- 1...Sxe5
- 2.Sd4#
- 1...Bf6
- 2.Qxg4#
- 1...Sd2
- 2.Sxg3#
- 1...Bc1
- 2.Qxg4#
- 1...Bd2
- 2.Qxg4#
- 1...Be3
- 2.Qxg4#
- 1...Bf4
- 2.Qxg4#
- 1...Bh4
- 2.Qxg4#
- 1...Sh2
- 2.Sxg3#
- 1...Se3
- 2.Sxg3#
- 1...Sb4
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sa7
- 2.Sd4#
- 1...Sd8
- 2.Sd4#
- 1...Sxb8!
- 1...Bxh6
- 1.Se3+?
- Keys
- 1.Qh5!
- 1...Sxe5
- 2.Sxe7#
- 1...Sd2
- 2.Se3#
- 1...Ra4
- 2.Qxg5#
- 1...Rb4
- 2.Qxg5#
- 1...Rc4
- 2.Qxg5#
- 1...Rd4
- 2.Qxg5#
- 1...Re4
- 2.Qxg5#
- 1...Rf4
- 2.Qxg5#
- 1...Rh4
- 2.Qxg5#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb4
- 2.Sxe7#
- 1...Sd4
- 2.Sxe7#
- 1...Sa5
- 2.Sxe7#
- 1...Sa7
- 2.Sxe7#
- 1...Sb8
- 2.Sxe7#
- 1...Sd8
- 2.Sxe7#
- 1...Sxe5
- 1.Qh5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 10
- ADDED MATES = 7
- REMOVED MATES = 7
- Sets
- B(e);::QAB1(D),XR(c)
- B(e);XP(I)::QAB1(D),XR(c)
- S(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::S(A)
- S(f);N_GUARD::S(A),XS(f)
- S(f);N_GUARD,XP(F)::S(A)
- Tries
- Try
- S(E);CHECK
- Vars
- B(e);XS(E)::QAB1(D),XR(c)
- Refutation
- S(a);XS(E)
- Try
- S(E);CHECK,XP(g)
- Vars
- B(e);XS(E)::QAB1(D),XR(c)
- Refutation
- S(f);XS(E)
- Try
- B(J);
- Vars
- B(e);XP(I)::QAB1(D),XR(c)
- S(f);N_GUARD,XP(F)::S(A)
- B(e);::QAB1(D),XR(c)
- S(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::S(A)
- S(f);N_GUARD::S(A),XS(f)
- Refutation
- P(g);XB(J)
- Try
- B(J);
- Vars
- B(e);XP(I)::QAB1(D),XR(c)
- S(f);N_GUARD,XP(F)::S(A)
- B(e);::QAB1(D),XR(c)
- S(a);N_GUARD::S(A),XP(b)
- S(f);N_GUARD::S(A)
- S(f);N_GUARD::S(A),XS(f)
- Refutation
- S(f);XB(J)
- Try
- Actual
- Q(D);N_PINR(c),P_PINB(e)
- Vars
- S(f);N_GUARD,XP(F)::S(E),XP(g)
- S(a);N_GUARD::S(E)
- R(c);N_GUARD::QAR1(D),XB(e)
- S(a);N_GUARD::S(E),XS(a)
- S(f);N_GUARD::S(E),XP(g)
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).