MESON Chess Problem Database
Problem Display
PID: 136689 (5B2/5p2/4pk2/1Q5K/4Pb2/4n3/5N2/8 w - - 0 1)
Graham, John H
Checkmate, 1901
#2
5 + 5
| 6490 | yacpdb | 2010 |
SOLUTION
- SOUND
- Sets
- 1...Bh2
- 2.Qg5#
- 1...Bg3
- 2.Qg5#
- 1...Bg5
- 2.Qxg5#
- 1...Bd6
- 2.Qg5#
- 1...Bc7
- 2.Qg5#
- 1...Bb8
- 2.Qg5#
- 1...Sd1
- 2.Sg4#
- 1...Sf1
- 2.Sg4#
- 1...Sc2
- 2.Sg4#
- 1...Sg2
- 2.Sg4#
- 1...Sc4
- 2.Sg4#
- 1...Sg4
- 2.Sxg4#
- 1...Sd5
- 2.Sg4#
- 1...Sf5
- 2.Sg4#
- 1...e5
- 2.Qa6#
- 2.Qc6#
- 2.Qb6#
- 1...Bh2
- Tries
- 1.Qb2+?
- 1...e5
- 2.Qb6#
- 1...Be5!
- 1...e5
- 1.Qa5?
- 1...Sd5
- 2.Sg4#
- 1...e5
- 2.Qb6#
- 2.Qa6#
- 1...Bh2
- 2.Qg5#
- 1...Bg3
- 2.Qg5#
- 1...Be5
- 2.Qd8#
- 1...Bg5
- 2.Qxg5#
- 1...Bd6
- 2.Qg5#
- 1...Bc7
- 2.Qg5#
- 1...Bb8
- 2.Qg5#
- 1...Sd1
- 2.Sg4#
- 1...Sf1
- 2.Sg4#
- 1...Sc2
- 2.Sg4#
- 1...Sg2
- 2.Sg4#
- 1...Sc4
- 2.Sg4#
- 1...Sg4
- 2.Sxg4#
- 1...Sf5
- 2.Sg4#
- 1...Bh6!
- 1...Sd5
- 1.Qc5?
- 1...Sd5
- 2.Sg4#
- 1...e5
- 2.Qb6#
- 2.Qd6#
- 2.Qe7#
- 2.Qc6#
- 1...Bh2
- 2.Qg5#
- 1...Bg3
- 2.Qg5#
- 1...Be5
- 2.Qe7#
- 1...Bg5
- 2.Qxg5#
- 1...Bd6
- 2.Qg5#
- 1...Bc7
- 2.Qg5#
- 1...Bb8
- 2.Qg5#
- 1...Sd1
- 2.Sg4#
- 1...Sf1
- 2.Sg4#
- 1...Sc2
- 2.Sg4#
- 1...Sg2
- 2.Sg4#
- 1...Sc4
- 2.Sg4#
- 1...Sg4
- 2.Sxg4#
- 1...Sf5
- 2.Sg4#
- 1...Bh6!
- 1...Sd5
- 1.Qf5+?
- 1...Sxf5
- 2.Sg4#
- 1...exf5!
- 1...Sxf5
- 1.Qb2+?
- Keys
- 1.Qf1!
- 1...Ke5
- 2.Qa1#
- 1...Sxf1
- 2.Sg4#
- 1...Be5
- 2.Sg4#
- 1...Bh2
- 2.Sg4#
- 1...Bg3
- 2.Sg4#
- 1...Bg5
- 2.Sg4#
- 1...Bd6
- 2.Sg4#
- 1...Bh6
- 2.Sg4#
- 1...Bc7
- 2.Sg4#
- 1...Bb8
- 2.Sg4#
- 1...Sd1
- 2.Sg4#
- 1...Sc2
- 2.Sg4#
- 1...Sg2
- 2.Sg4#
- 1...Sc4
- 2.Sg4#
- 1...Sg4
- 2.Sxg4#
- 1...Sd5
- 2.Sg4#
- 1...Sf5
- 2.Sg4#
- 1...e5
- 2.Qa6#
- 1...Ke5
- 1.Qf1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 6
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- B(b);N_GUARD::QAB1(C)
- B(b);N_GUARD::QAB1(C),XB(b)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- Tries
- Try
- Q(C);CHECK
- Vars
- P(c);OGATEB,P_SPINP(c),SBLOCK::QAR(C)
- Refutation
- B(b);P_SPINB(b)
- Try
- Q(C);
- Vars
- S(a);N_GUARD::S(A)
- B(b);N_GUARD::QAB1(C)
- B(b);SBLOCK::QAB(C)
- B(b);N_GUARD::QAB1(C),XB(b)
- S(a);N_GUARD::S(A),XS(a)
- Refutation
- B(b);
- Try
- Q(C);
- Vars
- S(a);N_GUARD::S(A)
- B(b);N_GUARD::QAB1(C)
- B(b);SBLOCK::QAB1(C)
- B(b);N_GUARD::QAB1(C),XB(b)
- S(a);N_GUARD::S(A),XS(a)
- Refutation
- B(b);
- Try
- Q(C);CHECK
- Vars
- S(a);XQ(C)::S(A)
- Refutation
- P(c);XQ(C)
- Try
- Actual
- Q(C);
- Vars
- K(d);S_FLIGHT::QAB(C)
- S(a);N_GUARD,XQ(C)::S(A)
- B(b);::QAR(C)+S(A),DCHECK
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(c);OGATEB,SBLOCK::QAR(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).