MESON Chess Problem Database
Problem Display
PID: 141041 (5BB1/4R3/2pk4/2N5/8/4P2p/p2P3K/nqR5 w - - 0 1)
Andrade, Barry Jack da Costa
The Problemist, 1943
#2
8 + 6
| 5454 | Near Snap | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Sb7#
- 1...Qd3
- 2.Sb7#
- 1...Qe4
- 2.Sxe4#
- 2.Sb7#
- 1...Qf5
- 2.Sb7#
- 1...Qg6
- 2.Sb7#
- 1...Qh7
- 2.Sb7#
- 1...Qxc1
- 2.Se4#
- 2.Sb7#
- 1...Qb2
- 2.Se4#
- 1...Qb3
- 2.Se4#
- 1...Qb5
- 2.Se4#
- 1...Qb6
- 2.Se4#
- 1...Qb7
- 2.Se4#
- 2.Sxb7#
- 1...Qb8
- 2.Se4#
- 1...Sc2
- 2.Se4#
- 1...Sb3
- 2.Sb7#
- 1...Qc2
- Tries
- 1.Bf7?
- 1...Qxc1
- 2.Se4#
- 2.Sb7#
- 1...Qc2
- 2.Sb7#
- 1...Sc2
- 2.Se4#
- 1...Qd3
- 2.Sb7#
- 1...Qe4
- 2.Sxe4#
- 2.Sb7#
- 1...Qf5
- 2.Sb7#
- 1...Qg6
- 2.Sb7#
- 1...Qh7
- 2.Sb7#
- 1...Qb2
- 2.Se4#
- 1...Qb3
- 2.Se4#
- 1...Qb5
- 2.Se4#
- 1...Qb6
- 2.Se4#
- 1...Qb7
- 2.Se4#
- 2.Sxb7#
- 1...Qb8
- 2.Se4#
- 1...Sb3
- 2.Sb7#
- 1...Qb4!
- 1...Qxc1
- 1.Rxb1?
- threat
- 2.Se4#
- 2.Sb7#
- 1...Kxc5
- 2.Re4#
- 2.Re5#
- 2.Ra7#
- 2.Reb7#
- 2.Rc7#
- 2.Rd7#
- 2.Rg7#
- 2.Rh7#
- 2.Re8#
- 1...axb1B
- 2.Sb7#
- 1...axb1R
- 2.Se4#
- 1...axb1Q!
- threat
- 1.Rd1?
- 1...Kxc5
- 2.Rb7#
- 1...Qxd1
- 2.Se4#
- 2.Sb7#
- 1...Qc2
- 2.Sb7#
- 1...Qd3
- 2.Sb7#
- 1...Qe4
- 2.Sxe4#
- 2.Sb7#
- 1...Qf5
- 2.Sb7#
- 1...Qg6
- 2.Sb7#
- 1...Qh7
- 2.Sb7#
- 1...Qc1
- 2.Se4#
- 2.Sb7#
- 1...Qb2
- 2.Se4#
- 1...Qb3
- 2.Se4#
- 1...Qb5
- 2.Se4#
- 1...Qb6
- 2.Se4#
- 1...Qb7
- 2.Se4#
- 2.Sxb7#
- 1...Qb8
- 2.Se4#
- 1...Sc2
- 2.Se4#
- 1...Sb3
- 2.Sb7#
- 1...Qb4!
- 1...Kxc5
- 1.Re1?
- 1...Kxc5
- 2.Rb7#
- 1...Qxe1
- 2.Se4#
- 2.Sb7#
- 1...Qc2
- 2.Sb7#
- 1...Qd3
- 2.Sb7#
- 1...Qe4
- 2.Sxe4#
- 2.Sb7#
- 1...Qf5
- 2.Sb7#
- 1...Qg6
- 2.Sb7#
- 1...Qh7
- 2.Sb7#
- 1...Qc1
- 2.Se4#
- 2.Sb7#
- 1...Qd1
- 2.Se4#
- 2.Sb7#
- 1...Qb2
- 2.Se4#
- 1...Qb3
- 2.Se4#
- 1...Qb5
- 2.Se4#
- 1...Qb6
- 2.Se4#
- 1...Qb7
- 2.Se4#
- 2.Sxb7#
- 1...Qb8
- 2.Se4#
- 1...Sc2
- 2.Se4#
- 1...Sb3
- 2.Sb7#
- 1...Qb4!
- 1...Kxc5
- 1.Rf1?
- 1...Kxc5
- 2.Rb7#
- 1...Qxf1
- 2.Se4#
- 2.Sb7#
- 1...Qc2
- 2.Sb7#
- 1...Qd3
- 2.Sb7#
- 1...Qe4
- 2.Sxe4#
- 2.Sb7#
- 1...Qf5
- 2.Sb7#
- 1...Qg6
- 2.Sb7#
- 1...Qh7
- 2.Sb7#
- 1...Qc1
- 2.Se4#
- 2.Sb7#
- 1...Qd1
- 2.Se4#
- 2.Sb7#
- 1...Qe1
- 2.Se4#
- 2.Sb7#
- 1...Qb2
- 2.Se4#
- 1...Qb3
- 2.Se4#
- 1...Qb5
- 2.Se4#
- 1...Qb6
- 2.Se4#
- 1...Qb7
- 2.Se4#
- 2.Sxb7#
- 1...Qb8
- 2.Se4#
- 1...Sc2
- 2.Se4#
- 1...Sb3
- 2.Sb7#
- 1...Qb4!
- 1...Kxc5
- 1.Re6+?
- 1...Kd5
- 2.Re4#
- 2.Re8#
- 1...Kc7!
- 1...Kd5
- 1.Rf7+?
- 1...Kd5
- 2.Rf5#
- 1...Ke5!
- 1...Kd5
- 1.Bf7?
- Keys
- 1.Bc4!
- 1...Kxc5
- 2.Rb7#
- 1...Qxc1
- 2.Se4#
- 2.Sb7#
- 1...Qb4
- 2.Se4#
- 1...Qc2
- 2.Sb7#
- 1...Qd3
- 2.Sb7#
- 1...Qe4
- 2.Sxe4#
- 2.Sb7#
- 1...Qf5
- 2.Sb7#
- 1...Qg6
- 2.Sb7#
- 1...Qh7
- 2.Sb7#
- 1...Qb2
- 2.Se4#
- 1...Qb3
- 2.Se4#
- 1...Qb5
- 2.Se4#
- 1...Qb6
- 2.Se4#
- 1...Qb7
- 2.Se4#
- 2.Sxb7#
- 1...Qb8
- 2.Se4#
- 1...Sc2
- 2.Se4#
- 1...Sb3
- 2.Sb7#
- 1...Kxc5
- 1.Bc4!
Anticipated by 137506(1929)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(b);N_GUARD,P_PINP(B)::S(E)
- Q(b);N_GUARD::S(E)
- S(a);S_CUTQ(b)::S(E)
- Tries
- Try
- B(H);
- Vars
- Q(b);N_GUARD,P_PINP(B)::S(E)
- S(a);S_CUTQ(b)::S(E)
- Q(b);N_GUARD::S(E)
- Refutation
- Q(b);
- Try
- R(A);XQ(b)
- Threat
- DUALS(2)
- Vars
- P(c);XR(A)::S(E)
- Refutation
- P(c);XR(A)
- Try
- R(A);
- Vars
- K(f);S_FLIGHT,XS(E)::B(G)+R(F)
- Q(b);N_GUARD,P_PINP(B)::S(E)
- Q(b);N_GUARD::S(E)
- S(a);S_CUTQ(b)::S(E)
- Refutation
- Q(b);
- Try
- R(A);
- Vars
- K(f);S_FLIGHT,XS(E)::B(G)+R(F)
- Q(b);N_GUARD,P_PINP(B)::S(E)
- Q(b);N_GUARD::S(E)
- S(a);S_CUTQ(b)::S(E)
- Refutation
- Q(b);
- Try
- R(A);
- Vars
- K(f);S_FLIGHT,XS(E)::B(G)+R(F)
- Q(b);N_GUARD,P_PINP(B)::S(E)
- Q(b);N_GUARD::S(E)
- S(a);S_CUTQ(b)::S(E)
- Refutation
- Q(b);
- Try
- R(F);CHECK
- Refutation
- K(f);S_FLIGHT
- Try
- R(F);CHECK
- Vars
- K(f);P-FLIGHT::B(H)+R(F),DCHECK
- Refutation
- K(f);S_FLIGHT
- Try
- Actual
- B(H);
- Vars
- K(f);S_FLIGHT,XS(E)::B(G)+R(F)
- Q(b);N_GUARD::S(E)
- Q(b);N_GUARD,P_PINP(B)::S(E)
- S(a);S_CUTQ(b)::S(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).