MESON Chess Problem Database
Problem Display
PID: 2488 (8/8/8/8/5N2/6n1/1np5/1rk1K2Q w - - 0 1)
Loyd, Sam
Saturday Press, 1857
#2
3 + 5
| 1679 | American Chess Nuts | 1868 |
| 5206 | Sam Loyd and His Chess Problems | 1913 |
| 3310 | 2345 Chess Problems | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Sd3#
- 1...Sd3+
- 2.Sxd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Sxh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Sh5
- 2.Se2#
- 1...Sd1
- Tries
- 1.Qg2?
- threat
- 2.Qd2#
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Ra1!
- threat
- 1.Qf3?
- threat
- 2.Qe3#
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Ra1!
- threat
- 1.Qe4?
- threat
- 2.Qe3#
- 1...Sd3+
- 2.Sxd3#
- 1...Sxe4
- 2.Se2#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Ra1!
- threat
- 1.Qd5?
- threat
- 2.Qd2#
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Se4
- 2.Se2#
- 1...Ra1!
- threat
- 1.Qc6?
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Sh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Sh5
- 2.Se2#
- 1...Ra1!
- 1...Sd3+
- 1.Qb7?
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Sh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Sh5
- 2.Se2#
- 1...Ra1!
- 1...Sd3+
- 1.Qf1?
- 1...Sd3+
- 2.Sxd3#
- 1...Sxf1
- 2.Se2#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Sh5
- 2.Se2#
- 1...Ra1!
- 1...Sd3+
- 1.Qg1?
- threat
- 2.Qe3#
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Ra1!
- threat
- 1.Qh2?
- threat
- 2.Qd2#
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Ra1!
- threat
- 1.Qh3?
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Sh1
- 2.Se2#
- 2.Qe3#
- 1...Se2
- 2.Sxe2#
- 2.Qe3#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Sh5
- 2.Se2#
- 2.Qe3#
- 1...Ra1!
- 1...Sd3+
- 1.Qh4?
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Sh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Sh5
- 2.Se2#
- 1...Ra1!
- 1...Sd3+
- 1.Qh5?
- 1...Sd3+
- 2.Sxd3#
- 1...Sxh5
- 2.Se2#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Sh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Ra1!
- 1...Sd3+
- 1.Qh6?
- threat
- 2.Se2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sd5#
- 2.Sh5#
- 2.Se6#
- 2.Sg6#
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 2.Sd3#
- 1...Se2
- 2.Sxe2#
- 2.Sd3#
- 1...Se4
- 2.Se2#
- 2.Sd3#
- 1...Sf5
- 2.Se2#
- 2.Sd3#
- 1...Sh5
- 2.Se2#
- 2.Sd3#
- 2.Sxh5#
- 1...Ra1!
- threat
- 1.Qh7?
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Sh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Sh5
- 2.Se2#
- 1...Ra1!
- 1...Sd3+
- 1.Qh8?
- 1...Sd3+
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Sh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Sh5
- 2.Se2#
- 1...Ra1!
- 1...Sd3+
- 1.Qg2?
- Keys
- 1.Qa8!
- 1...Sd3+
- 2.Sxd3#
- 1...Ra1
- 2.Qxa1#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Sf1
- 2.Se2#
- 1...Sh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...Sf5
- 2.Se2#
- 1...Sh5
- 2.Se2#
- 1...Sd3+
- 1.Qa8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(c);N_GUARD::S(C)
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD,XQ(B)::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Tries
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Refutation
- R(a);
- Try
- Q(B);
- Threat
- QAB(B)
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- Refutation
- R(a);
- Try
- Q(B);
- Threat
- QAB(B)
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(e);N_GUARD,XQ(B)::S(C)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- Refutation
- R(a);
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- Refutation
- R(a);
- Try
- Q(B);P_PINP(d)
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(c);N_GUARD,N_SPINP(d)::S(C)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Refutation
- R(a);
- Try
- Q(B);
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Refutation
- R(a);
- Try
- Q(B);
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(e);N_GUARD,XQ(B)::S(C)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Refutation
- R(a);
- Try
- Q(B);
- Threat
- QAB(B)
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- Refutation
- R(a);
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Refutation
- R(a);
- Try
- Q(B);
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- Refutation
- R(a);
- Try
- Q(B);
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Refutation
- R(a);
- Try
- Q(B);
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(e);N_GUARD,XQ(B)::S(C)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Refutation
- R(a);
- Try
- Q(B);
- Threat
- DUALS(8)
- Vars
- S(c);CHECK::QAB(B)+S(C),DCHECK,XS(c)
- S(c);::QAB(B)+S(C),DCHECK
- Refutation
- R(a);
- Try
- Q(B);
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Refutation
- R(a);
- Try
- Q(B);
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Refutation
- R(a);
- Try
- Actual
- Q(B);
- Vars
- S(c);CHECK,N_GUARD::S(C),XS(c)
- R(a);OGATEB::QAR2(B),XR(a)
- S(c);N_GUARD::S(C)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(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).