MESON Chess Problem Database
Problem Display
PID: 70414 (6q1/6p1/8/3P2Qp/4kN2/4P3/3PP3/b2K4 w - - 0 1)
Boswell, Edward
Chess, 1950
#2
7 + 5
SOLUTION
- SOUND
- Sets
- 1...Qxd5
- 2.Qxd5#
- 1...Be5
- 2.Qg6#
- 1...Qxd5
- Tries
- 1.Sg2?
- threat
- 2.d3#
- 1...Qxd5
- 2.Qf4#
- 1...Be5!
- threat
- 1.Sd3?
- threat
- 2.Sf2#
- 2.Sc5#
- 1...Qxd5
- 2.Sf2#
- 2.Qf4#
- 1...Be5
- 2.Qxe5#
- 1...Qf7
- 2.Sc5#
- 1...Qc8
- 2.Sf2#
- 1...Bd4
- 2.Sf2#
- 1...Qf8!
- threat
- 1.Sh3?
- threat
- 2.Sf2#
- 2.d3#
- 1...Qxd5
- 2.Sf2#
- 2.Qf4#
- 1...Qf7
- 2.d3#
- 1...Qf8
- 2.d3#
- 1...Be5!
- threat
- 1.Sxh5?
- threat
- 2.Sg3#
- 2.d3#
- 1...Qxd5
- 2.Sg3#
- 2.Qf4#
- 1...Qb8
- 2.d3#
- 1...Be5!
- threat
- 1.Se6?
- threat
- 2.Sc5#
- 2.d3#
- 1...Qxe6
- 2.d3#
- 1...Qc8
- 2.d3#
- 1...Qf8
- 2.d3#
- 1...Bd4
- 2.d3#
- 1...Be5!
- threat
- 1.Sg2?
- Keys
- 1.Sg6!
- threat
- 2.d3#
- 1...Qxd5
- 2.Qf4#
- 1...Be5
- 2.Qxe5#
- threat
- 1.Sg6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(e);OGATE,P_PINP(B),XP(F)::QAB1(G),XQ(e)
- B(a);SBLOCK::QAB(G)
- Tries
- Try
- S(E);
- Threat
- P(B)
- Vars
- Q(e);P_PINP(B),SBLOCK,XP(F)::QAR1(G)
- Refutation
- B(a);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- B(a);N_GUARD::QAR1(G),XB(a)
- Q(e);::S(E)
- B(a);::S(E)
- Refutation
- Q(e);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(e);::P(B)
- Refutation
- B(a);
- Try
- S(E);XP(c)
- Threat
- DUALS(2)
- Vars
- Q(e);::P(B)
- Refutation
- B(a);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(e);XS(E)::P(B)
- Q(e);::P(B)
- B(a);::P(B)
- Refutation
- B(a);
- Try
- Actual
- S(E);
- Threat
- P(B)
- Vars
- Q(e);P_PINP(B),SBLOCK,XP(F)::QAR1(G)
- B(a);N_GUARD::QAR1(G),XB(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).