MESON Chess Problem Database
Problem Display
PID: 44536 (Q7/1p6/3pBp1n/1qN1k1NK/3pPp2/5P2/8/8 w - - 0 1)
Wheeler, Charles Henry
Maryland Chess Review, 1875
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Sd7#
- 1...Qe2
- 2.Sd7#
- 1...Qd3
- 2.Sxd3#
- 2.Sd7#
- 1...Qa4
- 2.Sd3#
- 1...Qc4
- 2.Sd7#
- 1...Qa6
- 2.Sd7#
- 1...Qc6
- 2.Sd3#
- 1...Qd7
- 2.Sd3#
- 2.Sxd7#
- 1...Qb1
- 2.Sd7#
- 1...Qb2
- 2.Sd3#
- 2.Sd7#
- 1...Qb3
- 2.Sd7#
- 1...Qb4
- 2.Sd3#
- 2.Sd7#
- 1...Qa5
- 2.Sd3#
- 2.Sd7#
- 1...Qb6
- 2.Sd3#
- 2.Sd7#
- 1...Sg4
- 2.Sf7#
- 1...Sf5
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...dxc5
- 2.Qb8#
- 1...d5
- 2.Qb8#
- 1...fxg5
- 2.Qh8#
- 1...f5
- 2.Qh8#
- 1...b6
- 2.Qd5#
- 1...Qf1
- Tries
- 1.Ba2?
- 1...Qe8+
- 2.Qxe8#
- 1...Qxc5
- 2.Qe8#
- 1...dxc5
- 2.Qb8#
- 1...fxg5
- 2.Qh8#
- 1...d5
- 2.Qb8#
- 1...f5
- 2.Qh8#
- 1...Qf1
- 2.Sd7#
- 2.Qe8#
- 1...Qe2
- 2.Sd7#
- 2.Qe8#
- 1...Qd3
- 2.Sxd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qa4
- 2.Sd3#
- 1...Qc4
- 2.Sd7#
- 1...Qa6
- 2.Sd7#
- 2.Qe8#
- 1...Qc6
- 2.Sd3#
- 1...Qd7
- 2.Sd3#
- 2.Sxd7#
- 1...Qb1
- 2.Sd7#
- 2.Qe8#
- 1...Qb2
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qb3
- 2.Sd7#
- 1...Qb4
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qa5
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qb6
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Sg4
- 2.Sf7#
- 1...Sf5
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...b6
- 2.Qd5#
- 1...d3!
- 1...Qe8+
- 1.Bh3?
- 1...Qe8+
- 2.Qxe8#
- 1...Qxc5
- 2.Qe8#
- 1...dxc5
- 2.Qb8#
- 1...fxg5
- 2.Qh8#
- 1...d5
- 2.Qb8#
- 1...f5
- 2.Qh8#
- 1...Qf1
- 2.Sd7#
- 2.Qe8#
- 1...Qe2
- 2.Sd7#
- 2.Qe8#
- 1...Qd3
- 2.Sxd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qa4
- 2.Sd3#
- 1...Qc4
- 2.Sd7#
- 1...Qa6
- 2.Sd7#
- 2.Qe8#
- 1...Qc6
- 2.Sd3#
- 1...Qd7
- 2.Sd3#
- 2.Sxd7#
- 1...Qb1
- 2.Sd7#
- 2.Qe8#
- 1...Qb2
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qb3
- 2.Sd7#
- 1...Qb4
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qa5
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qb6
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Sg4
- 2.Sf7#
- 1...Sf5
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...b6
- 2.Qd5#
- 1...d3!
- 1...Qe8+
- 1.Bc4?
- threat
- 2.Sd3#
- 1...Qe8+
- 2.Qxe8#
- 1...Qxc4
- 2.Sd7#
- 1...Qxc5
- 2.Qe8#
- 1...dxc5
- 2.Qb8#
- 1...fxg5
- 2.Qh8#
- 1...d5
- 2.Qb8#
- 1...f5
- 2.Qh8#
- 1...Qb1
- 2.Sd7#
- 2.Qe8#
- 1...Qb3
- 2.Sd7#
- 2.Qe8#
- 1...d3!
- threat
- 1.Bg4?
- 1...Qe8+
- 2.Qxe8#
- 1...Qxc5
- 2.Qe8#
- 1...Sxg4
- 2.Sf7#
- 1...dxc5
- 2.Qb8#
- 1...fxg5
- 2.Qh8#
- 1...d5
- 2.Qb8#
- 1...f5
- 2.Qh8#
- 1...Qf1
- 2.Sd7#
- 2.Qe8#
- 1...Qe2
- 2.Sd7#
- 2.Qe8#
- 1...Qd3
- 2.Sxd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qa4
- 2.Sd3#
- 1...Qc4
- 2.Sd7#
- 1...Qa6
- 2.Sd7#
- 2.Qe8#
- 1...Qc6
- 2.Sd3#
- 1...Qd7
- 2.Sd3#
- 2.Sxd7#
- 1...Qb1
- 2.Sd7#
- 2.Qe8#
- 1...Qb2
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qb3
- 2.Sd7#
- 1...Qb4
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qa5
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qb6
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Sf5
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...b6
- 2.Qd5#
- 1...d3!
- 1...Qe8+
- 1.Bf5?
- 1...Qe8+
- 2.Qxe8#
- 1...Qxc5
- 2.Qe8#
- 1...Sxf5
- 2.Sf7#
- 1...dxc5
- 2.Qb8#
- 1...fxg5
- 2.Qh8#
- 1...d5
- 2.Qb8#
- 1...Qf1
- 2.Sd7#
- 2.Qe8#
- 1...Qe2
- 2.Sd7#
- 2.Qe8#
- 1...Qd3
- 2.Sxd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qa4
- 2.Sd3#
- 1...Qc4
- 2.Sd7#
- 1...Qa6
- 2.Sd7#
- 2.Qe8#
- 1...Qc6
- 2.Sd3#
- 1...Qd7
- 2.Sd3#
- 2.Sxd7#
- 1...Qb1
- 2.Sd7#
- 2.Qe8#
- 1...Qb2
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qb3
- 2.Sd7#
- 1...Qb4
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qa5
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qb6
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Sg4
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...b6
- 2.Qd5#
- 1...d3!
- 1...Qe8+
- 1.Ba2?
- Keys
- 1.Bb3!
- 1...Qe8+
- 2.Qxe8#
- 1...Qxb3
- 2.Sd7#
- 1...Qxc5
- 2.Qe8#
- 1...dxc5
- 2.Qb8#
- 1...fxg5
- 2.Qh8#
- 1...d3
- 2.Qa1#
- 1...d5
- 2.Qb8#
- 1...f5
- 2.Qh8#
- 1...Qf1
- 2.Sd7#
- 2.Qe8#
- 1...Qe2
- 2.Sd7#
- 2.Qe8#
- 1...Qd3
- 2.Sxd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qa4
- 2.Sd3#
- 1...Qc4
- 2.Sd7#
- 1...Qa6
- 2.Sd7#
- 2.Qe8#
- 1...Qc6
- 2.Sd3#
- 1...Qd7
- 2.Sd3#
- 2.Sxd7#
- 1...Qb4
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qa5
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Qb6
- 2.Sd3#
- 2.Sd7#
- 2.Qe8#
- 1...Sg4
- 2.Sf7#
- 1...Sf5
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 1...b6
- 2.Qd5#
- 1...Qe8+
- 1.Bb3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- Q(c);N_GUARD::S(C)
- Q(c);N_GUARD,P_PINP(A)::S(C)
- S(g);N_GUARD::S(D)
- S(g);N_GUARD::S(D),XS(g)
- P(e);OGATEB,XS(C)::QAB(G)
- P(e);OGATEB::QAB(G)
- P(f);OGATEB,XS(D)::QAB(G)
- P(f);OGATEB::QAB(G)
- P(h);OGATE::QAR1(G)
- Tries
- Try
- B(F);
- Vars
- Q(c);CHECK,N_GUARD::QAR(G),XQ(c)
- Q(c);N_GUARD,XS(C)::QAR(G)
- P(e);OGATEB,XS(C)::QAB(G)
- P(f);OGATEB,XS(D)::QAB(G)
- P(e);OGATEB::QAB(G)
- P(f);OGATEB::QAB(G)
- Q(c);N_GUARD::S(C)
- S(g);N_GUARD::S(D)
- S(g);N_GUARD::S(D),XS(g)
- P(h);OGATE::QAR1(G)
- Refutation
- P(a);
- Try
- B(F);
- Vars
- Q(c);CHECK,N_GUARD::QAR(G),XQ(c)
- Q(c);N_GUARD,XS(C)::QAR(G)
- P(e);OGATEB,XS(C)::QAB(G)
- P(f);OGATEB,XS(D)::QAB(G)
- P(e);OGATEB::QAB(G)
- P(f);OGATEB::QAB(G)
- Q(c);N_GUARD::S(C)
- S(g);N_GUARD::S(D)
- S(g);N_GUARD::S(D),XS(g)
- P(h);OGATE::QAR1(G)
- Refutation
- P(a);
- Try
- B(F);
- Threat
- S(C)
- Vars
- Q(c);CHECK,N_GUARD::QAR(G),XQ(c)
- Q(c);N_GUARD,XB(F)::S(C)
- Q(c);N_GUARD,XS(C)::QAR(G)
- P(e);OGATEB,XS(C)::QAB(G)
- P(f);OGATEB,XS(D)::QAB(G)
- P(e);OGATEB::QAB(G)
- P(f);OGATEB::QAB(G)
- Refutation
- P(a);
- Try
- B(F);
- Vars
- Q(c);CHECK,N_GUARD::QAR(G),XQ(c)
- Q(c);N_GUARD,XS(C)::QAR(G)
- S(g);N_GUARD,XB(F)::S(D)
- P(e);OGATEB,XS(C)::QAB(G)
- P(f);OGATEB,XS(D)::QAB(G)
- P(e);OGATEB::QAB(G)
- P(f);OGATEB::QAB(G)
- Q(c);N_GUARD::S(C)
- S(g);N_GUARD::S(D)
- S(g);N_GUARD::S(D),XS(g)
- P(h);OGATE::QAR1(G)
- Refutation
- P(a);
- Try
- B(F);
- Vars
- Q(c);CHECK,N_GUARD::QAR(G),XQ(c)
- Q(c);N_GUARD,XS(C)::QAR(G)
- S(g);N_GUARD,XB(F)::S(D)
- P(e);OGATEB,XS(C)::QAB(G)
- P(f);OGATEB,XS(D)::QAB(G)
- P(e);OGATEB::QAB(G)
- Q(c);N_GUARD::S(C)
- S(g);N_GUARD::S(D)
- S(g);N_GUARD::S(D),XS(g)
- P(h);OGATE::QAR1(G)
- Refutation
- P(a);
- Try
- Actual
- B(F);
- Vars
- Q(c);CHECK,N_GUARD::QAR(G),XQ(c)
- Q(c);N_GUARD,XB(F)::S(C)
- Q(c);N_GUARD,XS(C)::QAR(G)
- P(e);OGATEB,XS(C)::QAB(G)
- P(f);OGATEB,XS(D)::QAB(G)
- P(a);OGATEB::QAB(G)
- P(e);OGATEB::QAB(G)
- P(f);OGATEB::QAB(G)
- Q(c);N_GUARD::S(C)
- S(g);N_GUARD::S(D)
- S(g);N_GUARD::S(D),XS(g)
- P(h);OGATE::QAR1(G)
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).