MESON Chess Problem Database
Problem Display
PID: 1945 (7B/2R1KnQ1/1p1PP3/3k4/2N5/r3p1N1/4n3/1q6 w - - 0 1)
Loyd, Sam
Philadelphia Evening Bulletin, 1858
#2
8 + 7
| 153 | La Strategie | 1867 |
| 1679 | American Chess Nuts | 1868 |
| 5206 | Sam Loyd and His Chess Problems | 1913 |
| 3360 | Simple Two-move Themes | 1924 |
| 20 | De Problemist | 1932 |
| 785 | Het Belgisch Schaakbord (L'Echiquier Belge) | 1950 |
| 5065 | Chess Problem Gems by Eight Eminent American Composers | 1972 |
| 5626 | European Junior Chess Solving Championship | 2003 |
| 5405 | Chess Solving Yearbook 2003 | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Sxb6#
- 1...Qc2
- 2.Sxb6#
- 1...Qd3
- 2.Sxb6#
- 1...Qe4
- 2.Sxb6#
- 1...Qf5
- 2.Sxb6#
- 1...Qg6
- 2.Sxb6#
- 1...Qh7
- 2.Sxb6#
- 1...Qa1
- 2.Sxb6#
- 1...Qc1
- 2.Sxb6#
- 1...Qd1
- 2.Sxb6#
- 1...Qe1
- 2.Sxb6#
- 1...Qf1
- 2.Sxb6#
- 1...Qg1
- 2.Sxb6#
- 1...Qh1
- 2.Sxb6#
- 1...Ra1
- 2.Sxe3#
- 1...Ra2
- 2.Sxe3#
- 1...Ra4
- 2.Sxe3#
- 1...Ra5
- 2.Sxe3#
- 1...Ra6
- 2.Sxe3#
- 1...Ra7
- 2.Sxe3#
- 1...Ra8
- 2.Sxe3#
- 1...Sc1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sc3
- 2.Sxe3#
- 2.Qd4#
- 1...Sxg3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 1...Sxd6
- 2.Qe5#
- 1...Sh6
- 2.Qe5#
- 1...Sd8
- 2.Qe5#
- 1...Sxh8
- 2.Qe5#
- 1...b5
- 2.Sb6#
- 1...Qa2
- Tries
- 1.Qc3?
- threat
- 2.Sxe3#
- 1...Sxg3
- 2.Qd4#
- 1...Qd3
- 2.Sxb6#
- 1...Qe4
- 2.Sxb6#
- 1...Qc1
- 2.Sxb6#
- 1...Qg1
- 2.Sxb6#
- 1...Rxc3!
- threat
- 1.Qg5+?
- 1...Qf5
- 2.Sxb6#
- 1...Se5
- 2.Qxe5#
- 1...Sxg5!
- 1...Qf5
- 1.Qc3?
- Keys
- 1.Qa1!
- 1...Qxa1
- 2.Sxb6#
- 1...Rxa1
- 2.Sxe3#
- 1...Sxg3
- 2.Qd4#
- 1...Sxd6
- 2.Qe5#
- 1...Sxh8
- 2.Qe5#
- 1...Qb2
- 2.Qh1#
- 1...Qa2
- 2.Sxb6#
- 2.Qh1#
- 1...Qc2
- 2.Sxb6#
- 1...Qd3
- 2.Sxb6#
- 1...Qe4
- 2.Sxb6#
- 1...Qf5
- 2.Sxb6#
- 1...Qg6
- 2.Sxb6#
- 1...Qh7
- 2.Sxb6#
- 1...Qc1
- 2.Sxb6#
- 1...Qd1
- 2.Sxb6#
- 1...Qe1
- 2.Sxb6#
- 1...Qf1
- 2.Sxb6#
- 1...Qg1
- 2.Sxb6#
- 1...Qh1
- 2.Sxb6#
- 2.Qxh1#
- 1...Qb3
- 2.Qh1#
- 1...Qb4
- 2.Qh1#
- 1...Qb5
- 2.Qh1#
- 1...Ra2
- 2.Sxe3#
- 1...Rb3
- 2.Qa8#
- 1...Rc3
- 2.Qa8#
- 1...Rd3
- 2.Qa8#
- 1...Ra4
- 2.Sxe3#
- 1...Ra5
- 2.Sxe3#
- 1...Ra6
- 2.Sxe3#
- 1...Ra7
- 2.Sxe3#
- 1...Ra8
- 2.Sxe3#
- 2.Qxa8#
- 1...Sc1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sc3
- 2.Sxe3#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 1...Sh6
- 2.Qe5#
- 1...Sd8
- 2.Qe5#
- 1...b5
- 2.Sb6#
- 1...Qxa1
- 1.Qa1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 3
- Sets
- Q(a);N_GUARD::S(B),XP(f)
- Q(a);N_GUARD,P_PINP(D)::S(B),XP(f)
- R(c);N_GUARD::S(B),XP(d)
- R(c);N_GUARD,P_PINR(E)::S(B),XP(d)
- S(b);N_GUARD::QAR1(G)
- S(b);N_GUARD,XS(A)::QAR1(G)
- S(b);N_GUARD::QAR1(G),XS(b)
- S(g);N_GUARD::QAR1(G),XS(g)
- S(g);N_GUARD::QAR1(G)
- S(g);N_GUARD,XP(C)::QAR1(G)
- S(g);N_GUARD,XB(H)::QAR1(G)
- P(f);S_CUTQ(a)::S(B)
- Tries
- Try
- Q(G);
- Threat
- S(B),XP(d)
- Vars
- S(b);N_GUARD,XS(A)::QAR1(G)
- Q(a);N_GUARD::S(B),XP(f)
- Q(a);N_GUARD,P_PINP(D)::S(B),XP(f)
- Refutation
- R(c);XQ(G)
- Try
- Q(G);CHECK
- Vars
- Q(a);P_SPINQ(a)::S(B),XP(f)
- S(g);N_GUARD,P_SPINS(g)::QAR1(G),XS(g)
- Refutation
- S(g);XQ(G)
- Try
- Actual
- Q(G);
- Vars
- Q(a);N_GUARD,XQ(G)::S(B),XP(f)
- R(c);N_GUARD,XQ(G)::S(B),XP(d)
- S(b);N_GUARD,XS(A)::QAR1(G)
- S(g);N_GUARD,XP(C)::QAR1(G)
- S(g);N_GUARD,XB(H)::QAR1(G)
- Q(a);OGATE::QAB(G)
- Q(a);N_GUARD::S(B),XP(f)
- Q(a);N_GUARD,P_PINP(D)::S(B),XP(f)
- Q(a);OGATE,P_PINP(C)::QAB(G)
- R(c);N_GUARD::S(B),XP(d)
- R(c);OGATE::QAB(G)
- R(c);N_GUARD,P_PINR(E)::S(B),XP(d)
- S(b);N_GUARD::QAR1(G)
- S(b);S_CUTR(c)::S(B),XP(d)
- S(b);N_GUARD::QAR1(G),XS(b)
- S(g);N_GUARD::QAR1(G),XS(g)
- S(g);N_GUARD::QAR1(G)
- P(f);S_CUTQ(a)::S(B)
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).