MESON Chess Problem Database
Problem Display
PID: 29186 (8/5Q1N/2R5/4p3/p2pk3/R1p4P/5B2/4K3 w - - 0 1)
Loyd, Sam
Detroit Free Press, 1876
#2
7 + 5
| 5206 | Sam Loyd and His Chess Problems | 1913 |
| 3310 | 2345 Chess Problems | 1997 |
| 14868 | Pirnie Collection | 2018 |
| 5454 | Near Snap | 2019 |
SOLUTION
- SOUND
- Sets
- 1...c2
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rc4#
- 1...c2
- Tries
- 1.Kd1?
- 1...Kd3
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rc4#
- 1...c2+!
- 1...Kd3
- 1.Kf1?
- 1...c2
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rc4#
- 1...Kd3!
- 1...c2
- 1.Sf8?
- 1...c2
- 2.Qf3#
- 1...d3
- 2.Rxa4#
- 2.Rc4#
- 1...Kd3!
- 1...c2
- 1.Bg1?
- 1...c2
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rc4#
- 1...Kd3!
- 1...c2
- 1.Raxc3?
- threat
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.R3c4#
- 2.R6c4#
- 1...dxc3!
- threat
- 1.Rcxc3?
- threat
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rc4#
- 1...dxc3!
- threat
- 1.Rc4?
- 1...c2
- 2.Sg5#
- 2.Re3#
- 2.Qf3#
- 1...Kd3!
- 1...c2
- 1.Rc5?
- 1...c2
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rc4#
- 1...Kd3!
- 1...c2
- 1.Ra6?
- 1...c2
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.R3xa4#
- 2.R6xa4#
- 1...Kd3!
- 1...c2
- 1.Rb6?
- 1...c2
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rb4#
- 1...Kd3!
- 1...c2
- 1.Rd6?
- 1...c2
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 1...Kd3!
- 1...c2
- 1.Rf6?
- 1...c2
- 2.Sg5#
- 2.Qb7#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Qc4#
- 2.Qb7#
- 1...Kd3!
- 1...c2
- 1.Rg6?
- 1...c2
- 2.Sg5#
- 2.Rg4#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rg4#
- 1...Kd3!
- 1...c2
- 1.Rh6?
- 1...c2
- 2.Sg5#
- 2.Rh4#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rh4#
- 1...Kd3!
- 1...c2
- 1.Rc7?
- 1...c2
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rc4#
- 1...Kd3!
- 1...c2
- 1.Rc8?
- 1...c2
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rc4#
- 1...Kd3!
- 1...c2
- 1.Qd5+?
- 1...Kd3
- 2.Raxc3#
- 2.Rcxc3#
- 1...Kf4
- 2.Rf6#
- 1...Kf5
- 2.Rf6#
- 2.Qf3#
- 1...Kxd5!
- 1...Kd3
- 1.Qg6+?
- 1...Kf3
- 2.Rf6#
- 2.Qg4#
- 1...Kf4
- 2.Rf6#
- 2.Qg4#
- 1...Kd5!
- 1...Kf3
- 1.h4?
- 1...c2
- 2.Sg5#
- 2.Qf3#
- 1...d3
- 2.Sg5#
- 2.Rxa4#
- 2.Rc4#
- 1...Kd3!
- 1...c2
- 1.Kd1?
- Keys
- 1.Qb7!
- 1...Kd3
- 2.Qb1#
- 1...Kf3
- 2.Rf6#
- 1...Kf4
- 2.Rf6#
- 1...Kd5
- 2.Sf6#
- 1...Kf5
- 2.Rf6#
- 1...c2
- 2.Rf6#
- 1...d3
- 2.Rf6#
- 1...Kd3
- 1.Qb7!
This anticipates 178113(1898), 200485(1906), 167288(1908-1910)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- K(d);P_SPINP(a),S_FLIGHT::QAR2(F)
- Refutation
- P(a);CHECK
- Try
- K(A);P-FLIGHT
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- S(G);
- Vars
- P(a);::QAB1(F)
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- B(B);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- R(C);XP(a)
- Threat
- DUALS(2)
- Refutation
- P(c);XR(C)
- Try
- R(E);XP(a)
- Threat
- DUALS(2)
- Refutation
- P(c);XR(E)
- Try
- R(E);P_PINP(c)
- Refutation
- K(d);N_SPINP(c),P_SPINP(a),S_FLIGHT
- Try
- R(E);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- R(E);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- R(E);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- R(E);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- R(E);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- R(E);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- R(E);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- R(E);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- R(E);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- Q(F);CHECK
- Vars
- K(d);P-FLIGHT::R(E)
- Refutation
- K(d);S_FLIGHT,XQ(F)
- Try
- Q(F);CHECK
- Refutation
- K(d);S_FLIGHT
- Try
- P(D);
- Refutation
- K(d);P_SPINP(a),S_FLIGHT
- Try
- Actual
- Q(F);
- Vars
- K(d);P_SPINP(a),S_FLIGHT::QAB(F)
- K(d);P_SPINP(a),S_FLIGHT::QAB(F)+R(E),DCHECK
- K(d);P-FLIGHT::R(E)
- K(d);S_FLIGHT::S(G)
- K(d);S_FLIGHT::R1(E)
- P(a);::QAB(F)+R(E)
- P(c);SBLOCK::QAB(F)+R(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).