MESON Chess Problem Database
Problem Display
PID: 2512 (8/1KN5/7Q/pnk5/r1qR4/8/8/2B5 w - - 0 1)
Loyd, Sam
La Strategie, 1867
#2
5 + 5
| 1679 | American Chess Nuts | 1868 |
| 5206 | Sam Loyd and His Chess Problems | 1913 |
| 15 | British Chess Magazine | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Kxd4
- 2.Qe3#
- 1...Qf1
- 2.Se6#
- 2.Qb6#
- 1...Qa2
- 2.Qb6#
- 1...Qe2
- 2.Qb6#
- 1...Qb3
- 2.Qb6#
- 1...Qd3
- 2.Se6#
- 2.Qb6#
- 1...Qe6
- 2.Sxe6#
- 1...Qf7
- 2.Qb6#
- 1...Qg8
- 2.Qb6#
- 1...Qxc1
- 2.Se6#
- 2.Qb6#
- 1...Qc2
- 2.Se6#
- 2.Qb6#
- 1...Qc3
- 2.Se6#
- 2.Qb6#
- 1...Qb4
- 2.Se6#
- 2.Qb6#
- 1...Rb4
- 2.Qb6#
- 1...Sa3
- 2.Qb6#
- 2.Qd6#
- 1...Sc3
- 2.Qb6#
- 2.Qd6#
- 1...Sxd4
- 2.Qf8#
- 2.Qb6#
- 1...Sd6+
- 2.Qxd6#
- 1...Sa7
- 2.Qb6#
- 2.Qd6#
- 1...Sxc7
- 2.Qb6#
- 1...Kxd4
- Tries
- 1.Bd2?
- threat
- 2.Qb6#
- 1...Sd6+
- 2.Qxd6#
- 1...Kxd4
- 2.Qe3#
- 1...Qxd4
- 2.Qc6#
- 1...Qe6
- 2.Sxe6#
- 1...Qd5+!
- threat
- 1.Qg5+?
- 1...Kxd4
- 2.Qe3#
- 1...Qd5+
- 2.Qxd5#
- 1...Kb4!
- 1...Kxd4
- 1.Qf8+?
- 1...Sd6+
- 2.Qxd6#
- 1...Kxd4!
- 1...Sd6+
- 1.Qc6+?
- 1...Kb4
- 2.Qxc4#
- 1...Kxd4!
- 1...Kb4
- 1.Bd2?
- Keys
- 1.Qe6!
- 1...Qd5+
- 2.Qxd5#
- 1...Sd6+
- 2.Qxd6#
- 1...Kb4
- 2.Qxc4#
- 1...Kxd4
- 2.Qe3#
- 1...Qxe6
- 2.Sxe6#
- 1...Qxc1
- 2.Qd5#
- 2.Qe5#
- 2.Qb6#
- 1...Qxd4
- 2.Sa6#
- 1...Sxd4
- 2.Qb6#
- 2.Qe7#
- 1...Sxc7
- 2.Qb6#
- 1...Qf1
- 2.Qd5#
- 2.Qe5#
- 2.Qb6#
- 1...Qa2
- 2.Qb6#
- 1...Qe2
- 2.Qd5#
- 2.Qb6#
- 1...Qb3
- 2.Qb6#
- 1...Qd3
- 2.Qd5#
- 2.Qe5#
- 2.Qb6#
- 1...Qc2
- 2.Qd5#
- 2.Qe5#
- 2.Qb6#
- 1...Qc3
- 2.Qd5#
- 2.Qe5#
- 2.Qb6#
- 1...Qb4
- 2.Qd5#
- 2.Qe5#
- 2.Qb6#
- 1...Ra1
- 2.Rxc4#
- 2.Qxc4#
- 1...Ra2
- 2.Rxc4#
- 2.Qxc4#
- 1...Ra3
- 2.Rxc4#
- 2.Qxc4#
- 1...Rb4
- 2.Qb6#
- 1...Sa3
- 2.Qb6#
- 2.Qd6#
- 1...Sc3
- 2.Qb6#
- 2.Qd6#
- 1...Sa7
- 2.Qb6#
- 2.Qd6#
- 1...Qd5+
- 1.Qe6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- K(e);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
- Q(b);::QAB1(C)
- Q(b);N_GUARD::S(E),XQ(b)
- Q(b);P_PINS(E)::QAB1(C)
- R(a);SBLOCK::QAB1(C)
- S(d);CHECK,N_GUARD::QAB1(C),XS(d)
- S(d);XS(E)::QAB1(C)
- Tries
- Try
- B(A);
- Threat
- QAB1(C)
- Vars
- S(d);CHECK,N_GUARD::QAB1(C),XS(d)
- K(e);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
- Q(b);SBLOCK,XR(B)::QAR1(C)
- Q(b);N_GUARD::S(E),XQ(b)
- Refutation
- Q(b);CHECK
- Try
- Q(C);CHECK
- Vars
- K(e);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
- Q(b);CHECK,N_GUARD,P_SPINQ(b)::QAR1(C),XQ(b)
- Refutation
- K(e);P_SPINQ(b),S_FLIGHT
- Try
- Q(C);CHECK
- Vars
- S(d);CHECK,N_GUARD,P_SPINS(d)::QAB1(C),XS(d)
- Refutation
- K(e);S_FLIGHT,XR(B)
- Try
- Q(C);CHECK
- Vars
- K(e);OGATE,P_SPINQ(b),S_FLIGHT::QAR1(C),XQ(b)
- Refutation
- K(e);S_FLIGHT,XR(B)
- Try
- Actual
- Q(C);
- Vars
- Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
- S(d);CHECK,N_GUARD::QAB1(C),XS(d)
- K(e);P_SPINQ(b),S_FLIGHT::QAR1(C),XQ(b)
- K(e);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
- Q(b);XQ(C)::S(E),XQ(b)
- Q(b);SBLOCK,XR(B)::S(E)
- S(d);XS(E)::QAB1(C)
- Q(b);::QAB1(C)
- R(a);SBLOCK::QAB1(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).