MESON Chess Problem Database
Problem Display
PID: 46501 (7B/nQ6/2q2R1K/8/3k2P1/1B4P1/2R2P2/7n w - - 0 1)
Loyd, Sam
New York Commercial Advertiser, 1897
#2
9 + 4
| 5206 | Sam Loyd and His Chess Problems | 1913 |
SOLUTION
- SOUND
- Sets
- 1...Ke5
- 2.Re6#
- 1...Qg2
- 2.Rf3#
- 2.Rd6#
- 1...Qf3
- 2.Rxf3#
- 2.Rd6#
- 1...Qa4
- 2.Rf3#
- 2.Rd6#
- 2.Qd5#
- 1...Qe4
- 2.Rd6#
- 1...Qb5
- 2.Rd6#
- 1...Qd5
- 2.Qxd5#
- 1...Qd7
- 2.Rd6#
- 1...Qe8
- 2.Rd6#
- 2.Qd5#
- 1...Qc3
- 2.Qd5#
- 1...Qc5
- 2.Rd6#
- 1...Qa6
- 2.Rd6#
- 2.Qd5#
- 1...Qb6
- 2.Rd6#
- 2.Qd5#
- 1...Qd6
- 2.Rxd6#
- 1...Qc7
- 2.Rd6#
- 2.Qd5#
- 1...Qc8
- 2.Rd6#
- 2.Qd5#
- 1...Ke5
- Tries
- 1.Rfxc6+?
- 1...Kd3
- 2.R6c3#
- 2.Rd6#
- 2.Qh7#
- 1...Ke4!
- 1...Kd3
- 1.Qxc6?
- threat
- 2.Rf3#
- 2.Rd6#
- 2.Qd5#
- 1...Kd3
- 2.Rf3#
- 2.Rd6#
- 2.Qd5#
- 2.Qc4#
- 1...Ke5
- 2.Rf3#
- 2.Rf4#
- 2.Rf5#
- 2.Rd6#
- 2.Re6#
- 2.Rg6#
- 2.Rf7#
- 2.Rf8#
- 2.Qd5#
- 1...Sxf2
- 2.Rf3#
- 1...Sxc6!
- threat
- 1.Qb4+?
- 1...Kd3
- 2.Rd2#
- 1...Ke5
- 2.Rfxc6#
- 2.Rd6#
- 2.Re6#
- 2.Qf4#
- 2.f4#
- 1...Qc4!
- 1...Kd3
- 1.Qh7?
- threat
- 2.Rfxc6#
- 2.Rd6#
- 2.Re6#
- 1...Qxf6+
- 2.Bxf6#
- 1...Ke5
- 2.Rfxc6#
- 2.Re6#
- 1...Qxc2
- 2.Rc6#
- 1...Sxf2
- 2.Re6#
- 1...Qe4
- 2.Rd6#
- 1...Qc3
- 2.Rc6#
- 1...Qc5
- 2.Rf4#
- 2.Rd6#
- 1...Qg2
- 2.Rf3#
- 2.Rf4#
- 2.Ra6#
- 2.Rb6#
- 2.Rfc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf7#
- 2.Rf8#
- 1...Qf3
- 2.Rxf3#
- 2.Rf4#
- 2.Rd6#
- 1...Qa4
- 2.Rf3#
- 2.Rf4#
- 2.Ra6#
- 2.Rb6#
- 2.Rfc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf7#
- 2.Rf8#
- 1...Qb5
- 2.Rf4#
- 2.Rd6#
- 1...Qd5
- 2.Rf4#
- 2.Rd6#
- 1...Qb7
- 2.Rf4#
- 2.Rd6#
- 2.Rf7#
- 1...Qd7
- 2.Rf4#
- 2.Rd6#
- 2.Rf7#
- 1...Qa8
- 2.Rf4#
- 2.Rd6#
- 2.Rf8#
- 1...Qe8
- 2.Rf4#
- 2.Rd6#
- 1...Qa6
- 2.Rxa6#
- 2.Rb6#
- 2.Rfc6#
- 2.Rd6#
- 2.Re6#
- 1...Qb6
- 2.Rxb6#
- 2.Rfc6#
- 2.Rd6#
- 2.Re6#
- 1...Qd6
- 2.Rxd6#
- 1...Qe6
- 2.Rxe6#
- 1...Qc7
- 2.Rf4#
- 2.Rd6#
- 1...Qc8
- 2.Rf4#
- 2.Rd6#
- 2.Rf8#
- 1...Qc4!
- threat
- 1.Rfxc6+?
- Keys
- 1.Rc3!
- threat
- 2.Re6#
- 1...Qxf6+
- 2.Bxf6#
- 1...Kxc3
- 2.Rd6#
- 1...Ke4
- 2.Re6#
- 1...Ke5
- 2.Re6#
- 1...Qxb7
- 2.Rf4#
- 1...Qxc3
- 2.Qd5#
- 1...Qf3
- 2.Rfxf3#
- 2.Rf4#
- 2.Rf5#
- 2.Rd6#
- 1...Qe4
- 2.Rf4#
- 2.Rd6#
- 1...Qb5
- 2.Rf4#
- 2.Rd6#
- 1...Qd5
- 2.Rf4#
- 1...Qd7
- 2.Rf4#
- 2.Rd6#
- 2.Rf7#
- 1...Qe8
- 2.Rf4#
- 2.Rd6#
- 1...Qc4
- 2.Rf5#
- 1...Qc5
- 2.Rf4#
- 2.Rd6#
- 1...Qd6
- 2.Rxd6#
- 1...Qe6
- 2.Rxe6#
- 1...Qc7
- 2.Rf4#
- 2.Rd6#
- 1...Qc8
- 2.Rf4#
- 2.Rd6#
- 2.Rf8#
- threat
- 1.Rc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 4
- Sets
- K(b);S_FLIGHT::B(I)+R(F),DCHECK
- Q(c);N_PINR(F)::B(I)+R(F),DCHECK
- Q(c);N_PINR(F),OGATE::QAR1(H),XQ(c)
- Q(c);N_PINR(F),OGATE::QAR1(H)
- Q(c);::B(I)+R(F),DCHECK,XQ(c)
- Tries
- Try
- R(F);CHECK,N_SPINR(F),XQ(c)
- Refutation
- K(b);P-FLIGHT
- Try
- Q(H);N_SPINR(F),XQ(c)
- Threat
- DUALS(3)
- Vars
- S(a);XP(B)::B(I)+R(F)
- Refutation
- S(d);XQ(H)
- Try
- Q(H);CHECK
- Vars
- K(b);P-FLIGHT::R1(A)
- Refutation
- Q(c);N_PINR(F),P_SPINQ(c)
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(F)::B(I),XQ(c)
- Q(c);N_PINR(F),XR(A)::B(I)+R(F)
- S(a);XP(B)::B(I)+R(F)
- Q(c);N_PINR(F)::B(I)+R(F),DCHECK
- Q(c);N_PINR(F)::B(I)+R(F)
- Q(c);::B(I)+R(F),DCHECK,XQ(c)
- Q(c);::B(I)+R(F),XQ(c)
- Refutation
- Q(c);N_PINR(F)
- Try
- Actual
- R(A);
- Threat
- B(I)+R(F)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(F)::B(I),XQ(c)
- K(b);S_FLIGHT,XR(A)::B(I)+R(F)
- K(b);P-FLIGHT,P_SPINQ(c)::R(F)
- K(b);S_FLIGHT::B(I)+R(F),DCHECK
- Q(c);N_PINR(F),XQ(H)::B(I)+R(F),DCHECK
- Q(c);N_PINR(F),OGATE,SBLOCK,XR(A)::QAR1(H)
- Q(c);N_PINR(F)::B(I)+R(F),DCHECK
- Q(c);N_PINR(F)::B(I)+R(F)
- Q(c);::B(I)+R(F),DCHECK,XQ(c)
- Q(c);::B(I)+R(F),XQ(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).