MESON Chess Problem Database
Problem Display
PID: 149691 (8/8/3Q4/8/8/2pK2n1/3B2P1/3k4 w - - 0 1)
Lincoln, Robert A
The Problemist, 2013
#2
4 + 3
SOLUTION
- SOUND
- Tries
- 1.Qa3?
- threat
- 2.Qc1#
- 2.Qa1#
- 1...cxd2
- 2.Qa1#
- 1...c2
- 2.Qc1#
- 1...Se2!
- threat
- 1.Qf4?
- 1...cxd2
- 2.Qxd2#
- 1...Sf1
- 2.Qxf1#
- 2.Qf3#
- 2.Qg4#
- 1...Sh1
- 2.Qf1#
- 2.Qf3#
- 2.Qg4#
- 1...Se2
- 2.Qf1#
- 1...Se4
- 2.Qf1#
- 2.Qf3#
- 2.Qg4#
- 1...Sf5
- 2.Qf1#
- 2.Qf3#
- 2.Qg4#
- 1...Sh5
- 2.Qf1#
- 2.Qf3#
- 2.Qg4#
- 1...c2!
- 1...cxd2
- 1.Qe6?
- threat
- 2.Qe1#
- 1...Se2
- 2.Qxe2#
- 1...Se4
- 2.Qg4#
- 1...cxd2!
- threat
- 1.Qa3?
- Keys
- 1.Qe5!
- threat
- 2.Qe1#
- 1...cxd2
- 2.Qa1#
- 1...Se2
- 2.Qxe2#
- 1...Se4
- 2.Qh5#
- threat
- 1.Qe5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Tries
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- P(b);XB(A)::QAR(D)
- P(b);::QAR1(D)
- Refutation
- S(c);
- Try
- Q(D);
- Vars
- P(b);OGATE,XB(A)::QAR1(D),XP(b)
- S(c);N_GUARD::QAR2(D)
- Refutation
- P(b);
- Try
- Q(D);
- Threat
- QAR1(D)
- Vars
- S(c);N_GUARD::QAB1(D),XS(c)
- S(c);N_GUARD::QAB(D)
- Refutation
- P(b);XB(A)
- Try
- Actual
- Q(D);
- Threat
- QAR1(D)
- Vars
- P(b);OGATE,XB(A)::QAR(D)
- S(c);N_GUARD::QAB1(D),XS(c)
- S(c);N_GUARD::QAB(D)
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).