MESON Chess Problem Database
Problem Display
PID: 557 (Q7/1p1rNN2/1B5p/P6P/4k3/R1b5/3pP3/3K1R2 w - - 0 1)
Driver, John Edward
The Observer, 1964
#2
10 + 6
SOLUTION
- SOUND
- Sets
- 1...Ba1
- 2.Re3#
- 1...Bb2
- 2.Re3#
- 1...Bb4
- 2.Re3#
- 1...Bxa5
- 2.Re3#
- 1...Be5
- 2.Re3#
- 1...Bf6
- 2.Re3#
- 1...Bg7
- 2.Re3#
- 1...Bh8
- 2.Re3#
- 1...Ba1
- Tries
- 1.Qxb7+?
- 1...Rd5
- 2.Qxd5#
- 1...Rxb7!
- 1...Rd5
- 1.Qg8?
- threat
- 2.Qh7#
- 2.Qg2#
- 2.Qg4#
- 2.Qg6#
- 1...Rxe7
- 2.Qg2#
- 1...Rd3
- 2.Qh7#
- 2.Qg4#
- 2.Qg6#
- 1...Rd5
- 2.Qg2#
- 2.Qg4#
- 1...Rd6
- 2.Qg2#
- 2.Qg4#
- 1...Be5
- 2.Re3#
- 2.Qh7#
- 2.Qg2#
- 2.Qg6#
- 1...Bg7
- 2.Re3#
- 2.Qh7#
- 1...Rd4!
- threat
- 1.Qxb7+?
- Keys
- 1.Qc8!
- 1...Rxe7
- 2.Qf5#
- 1...Bxa5
- 2.Re3#
- 1...Rd4
- 2.Qe6#
- 1...Rd3
- 2.Qg4#
- 2.Qf5#
- 1...Rd5
- 2.Qg4#
- 1...Rd6
- 2.Qg4#
- 2.Qf5#
- 1...Rc7
- 2.Qg4#
- 2.Qf5#
- 1...Rd8
- 2.Qg4#
- 2.Qf5#
- 1...Ba1
- 2.Re3#
- 1...Bb2
- 2.Re3#
- 1...Bb4
- 2.Re3#
- 1...Bd4
- 2.Qc2#
- 1...Be5
- 2.Re3#
- 1...Bf6
- 2.Re3#
- 1...Bg7
- 2.Re3#
- 1...Bh8
- 2.Re3#
- 1...Rxe7
- 1.Qc8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- B(b);OGATE::R1(D)
- B(b);OGATE,XP(E)::R1(D)
- Tries
- Try
- Q(J);CHECK,XP(e)
- Vars
- R(f);N_GUARD,P_SPINR(f)::QAB1(J),XR(f)
- Refutation
- R(f);XQ(J)
- Try
- Q(J);N_PINP(e)
- Threat
- DUALS(4)
- Vars
- R(f);XS(H)::QAB(J)
- Refutation
- R(f);
- Try
- Actual
- Q(J);N_PINP(e)
- Vars
- R(f);OGATE,XS(H)::QAB1(J)
- B(b);OGATE,XP(E)::R1(D)
- R(f);OGATE::QAR2(J)
- B(b);OGATE::R1(D)
- B(b);OGATE::QAB(J)
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).