MESON Chess Problem Database
Problem Display
PID: 169973 (5Q2/8/2KB4/N7/kp6/P7/8/8 w - - 0 1)
Lincoln, Robert A
StrateGems, 2017
#2
5 + 2
SOLUTION
- SOUND
- Sets
- 1...Kxa5
- 2.Qa8#
- 1...Kxa5
- Tries
- 1.Kb6?
- 1...bxa3
- 2.Qf4#
- 2.Qe8#
- 1...b3
- 2.Qf4#
- 2.Qe8#
- 1...Kxa3!
- 1...bxa3
- 1.Bc7?
- threat
- 2.Qxb4#
- 1...bxa3
- 2.Qf4#
- 1...b3
- 2.Qb4#
- 1...Kxa3!
- threat
- 1.Qf5?
- 1...bxa3
- 2.Qb5#
- 1...b3
- 2.Qb5#
- 1...Kxa3!
- 1...bxa3
- 1.Qb8?
- threat
- 2.Qxb4#
- 1...Kxa5
- 2.Qa7#
- 2.Qb5#
- 2.Qa8#
- 1...bxa3
- 2.Qb4#
- 2.Qb5#
- 1...b3
- 2.Qb4#
- 2.Qb5#
- 1...Kxa3!
- threat
- 1.Qe8?
- 1...Kxa5
- 2.Qa8#
- 1...bxa3
- 2.Kb6#
- 1...b3
- 2.Kb6#
- 1...Kxa3!
- 1...Kxa5
- 1.Kb6?
- Keys
- 1.Qf1!
- 1...Kxa3
- 2.Qa1#
- 1...Kxa5
- 2.Qb5#
- 1...bxa3
- 2.Qb5#
- 1...b3
- 2.Qb5#
- 1...Kxa3
- 1.Qf1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- K(a);OGATEB,P-FLIGHT,XS(B)::QAR(E)
- Tries
- Try
- K(C);P-FLIGHT
- Refutation
- K(a);P-FLIGHT,P_SPINP(b),XP(A)
- Try
- B(D);
- Threat
- QAR1(E),XP(b)
- Vars
- P(b);OGATEB,SBLOCK,XP(A)::QAR(E)
- P(b);::QAR1(E)
- Refutation
- K(a);P-FLIGHT,P_SPINP(b),XP(A)
- Try
- Q(E);
- Vars
- P(b);XP(A)::QAB1(E)
- P(b);::QAB1(E)
- Refutation
- K(a);P-FLIGHT,P_SPINP(b),XP(A)
- Try
- Q(E);
- Threat
- QAR1(E),XP(b)
- Refutation
- K(a);P-FLIGHT,P_SPINP(b),XP(A)
- Try
- Q(E);
- Vars
- K(a);OGATEB,P-FLIGHT,XS(B)::QAR(E)
- P(b);XP(A)::QAB(E)+K(C)
- P(b);::QAB(E)+K(C)
- Refutation
- K(a);P-FLIGHT,P_SPINP(b),XP(A)
- Try
- Actual
- Q(E);
- Vars
- K(a);OGATEB,P-FLIGHT,P_SPINP(b),XP(A)::QAR2(E)
- K(a);P-FLIGHT,XS(B)::QAR1(E)
- P(b);XP(A)::QAB1(E)
- P(b);::QAB1(E)
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).