MESON Chess Problem Database
Problem Display
PID: 215632 (8/4pK2/5n2/5kb1/2N2B2/4P2P/6QP/8 w - - 0 1)
Lewis, Robert Tony
The Problemist, 1987
#2
7 + 4
SOLUTION
- SOUND
- Sets
- 1...Bxf4
- 2.Qg6#
- 1...Bh4
- 2.Qg6#
- 1...Bh6
- 2.Qg6#
- 1...Se4
- 2.Qg4#
- 1...Sg4
- 2.Qc2#
- 2.hxg4#
- 1...Sd5
- 2.Qc2#
- 1...Sh5
- 2.Qc2#
- 1...Sd7
- 2.Qc2#
- 1...Sh7
- 2.Qc2#
- 1...Se8
- 2.Qc2#
- 1...Sg8
- 2.Qc2#
- 1...e5
- 2.Sd6#
- 1...e6
- 2.Sd6#
- 1...Bxf4
- Tries
- 1.Sd2?
- threat
- 2.Qxg5#
- 1...Bh4
- 2.Qg6#
- 1...Bh6
- 2.Qg6#
- 1...Se4
- 2.Qxe4#
- 2.Qg4#
- 1...Sg4
- 2.Qe4#
- 2.Qxg4#
- 2.hxg4#
- 1...Sh7
- 2.Qe4#
- 2.Qg4#
- 1...Bxf4!
- threat
- 1.Be5?
- 1...Bxe3
- 2.Qg6#
- 1...Bf4
- 2.Qg6#
- 1...Bh4
- 2.Qg6#
- 1...Bh6
- 2.Qg6#
- 1...Se4
- 2.Qg4#
- 1...Sg4
- 2.Qc2#
- 2.Qxg4#
- 2.e4#
- 2.hxg4#
- 1...Sd5
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sh5
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sd7
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sh7
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Se8
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sg8
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...e6!
- 1...Bxe3
- 1.Bxg5?
- 1...Sg4
- 2.Qxg4#
- 1...e5
- 2.Sd6#
- 1...Se4
- 2.Qg4#
- 1...Sd5
- 2.Qg4#
- 2.e4#
- 1...Sh5
- 2.Qg4#
- 2.e4#
- 1...Sd7
- 2.Qg4#
- 2.e4#
- 1...Sh7
- 2.Qg4#
- 2.e4#
- 1...Se8
- 2.Qg4#
- 2.e4#
- 1...Sg8
- 2.Qg4#
- 2.e4#
- 1...e6!
- 1...Sg4
- 1.Bc7?
- 1...Bxe3
- 2.Sxe3#
- 2.Qg6#
- 1...e5
- 2.Sd6#
- 1...Bf4
- 2.Qg6#
- 1...Bh4
- 2.Qg6#
- 1...Bh6
- 2.Qg6#
- 1...Se4
- 2.Qg4#
- 1...Sg4
- 2.Qc2#
- 2.Qxg4#
- 2.e4#
- 2.hxg4#
- 1...Sd5
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sh5
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sd7
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sh7
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Se8
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sg8
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...e6!
- 1...Bxe3
- 1.Bb8?
- 1...Bxe3
- 2.Sxe3#
- 2.Qg6#
- 1...e5
- 2.Sd6#
- 1...Bf4
- 2.Qg6#
- 1...Bh4
- 2.Qg6#
- 1...Bh6
- 2.Qg6#
- 1...Se4
- 2.Qg4#
- 1...Sg4
- 2.Qc2#
- 2.Qxg4#
- 2.e4#
- 2.hxg4#
- 1...Sd5
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sh5
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sd7
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sh7
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Se8
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...Sg8
- 2.Qc2#
- 2.Qg4#
- 2.e4#
- 1...e6!
- 1...Bxe3
- 1.Qd5+?
- 1...e5
- 2.Sd6#
- 2.Qxe5#
- 1...Sxd5!
- 1...e5
- 1.Qc6?
- threat
- 2.Qe6#
- 1...e5
- 2.Sd6#
- 1...e6
- 2.Sd6#
- 2.Qxe6#
- 1...Bxf4!
- threat
- 1.Qg1?
- 1...Bxf4
- 2.Qg6#
- 1...e5
- 2.Sd6#
- 1...Bh4
- 2.Qg6#
- 1...Bh6
- 2.Qg6#
- 1...Se4
- 2.Qg4#
- 1...Sg4
- 2.Qb1#
- 1...Sd5
- 2.Qb1#
- 1...Sh5
- 2.Qb1#
- 1...Sd7
- 2.Qb1#
- 1...Sh7
- 2.Qb1#
- 1...Se8
- 2.Qb1#
- 1...Sg8
- 2.Qb1#
- 1...e6
- 2.Sd6#
- 1...Ke4!
- 1...Bxf4
- 1.e4+?
- 1...Sxe4
- 2.Qg4#
- 1...Kxf4!
- 1...Sxe4
- 1.Sd2?
- Keys
- 1.Qf3!
- 1...Bxf4
- 2.Qxf4#
- 1...e5
- 2.Sd6#
- 1...Bh4
- 2.Bh6#
- 1...Bh6
- 2.Bxh6#
- 1...Se4
- 2.Qg4#
- 1...Sg4
- 2.e4#
- 2.hxg4#
- 1...Sd5
- 2.e4#
- 1...Sh5
- 2.e4#
- 1...Sd7
- 2.e4#
- 1...Sh7
- 2.e4#
- 1...Se8
- 2.e4#
- 1...Sg8
- 2.e4#
- 1...e6
- 2.Sd6#
- 1...Bxf4
- 1.Qf3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(b);OGATE,XB(F)::QAB1(A)
- B(b);OGATE::QAB1(A)
- S(c);N_GUARD,SBLOCK::QAB1(A)
- S(c);N_GUARD::QAB(A)
- P(d);N_GUARD::S(E)
- Tries
- Try
- S(E);
- Threat
- QAR1(A),XB(b)
- Vars
- B(b);OGATE::QAB1(A)
- Refutation
- B(b);XB(F)
- Try
- B(F);
- Vars
- B(b);OGATE,XP(C)::QAB1(A)
- B(b);OGATE::QAB1(A)
- S(c);N_GUARD::QAB1(A)
- Refutation
- P(d);
- Try
- B(F);XB(b)
- Vars
- S(c);N_GUARD::QAB1(A),XS(c)
- P(d);N_GUARD,SBLOCK::S(E)
- S(c);N_GUARD::QAB1(A)
- Refutation
- P(d);
- Try
- B(F);
- Vars
- P(d);N_GUARD,SBLOCK::S(E)
- B(b);OGATE::QAB1(A)
- S(c);N_GUARD::QAB1(A)
- Refutation
- P(d);
- Try
- B(F);
- Vars
- P(d);N_GUARD,SBLOCK::S(E)
- B(b);OGATE::QAB1(A)
- S(c);N_GUARD::QAB1(A)
- Refutation
- P(d);
- Try
- Q(A);CHECK
- Refutation
- S(c);XQ(A)
- Try
- Q(A);
- Threat
- QAB1(A)
- Vars
- P(d);N_GUARD::S(E)
- Refutation
- B(b);XB(F)
- Try
- Q(A);
- Vars
- B(b);OGATE,XB(F)::QAB1(A)
- P(d);N_GUARD::S(E)
- B(b);OGATE::QAB1(A)
- S(c);N_GUARD,SBLOCK::QAB1(A)
- S(c);N_GUARD::QAB(A)
- Refutation
- K(a);S_FLIGHT
- Try
- P(C);CHECK
- Vars
- S(c);SBLOCK,XP(C)::QAB1(A)
- Refutation
- K(a);P-FLIGHT,XB(F)
- Try
- Actual
- Q(A);
- Vars
- B(b);OGATE,P_SPINB(b),XB(F)::QAR1(A),XB(b)
- P(d);N_GUARD::S(E)
- B(b);OGATE::QAR(A)+B(F)
- B(b);OGATE::QAR(A)+B(F),XB(b)
- S(c);N_GUARD,SBLOCK::QAB1(A)
- S(c);N_GUARD::P(C)
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).