MESON Chess Problem Database
Problem Display
PID: 252861 (8/4Rpp1/2nk4/1B2R3/5Q2/4K3/8/8 w - - 0 1)
Dowd, Steven B
Problemas, 2021
#2
5 + 4
SOLUTION
- SOUND
- Sets
- 1...Sb4
- 2.Rd7#
- 2.Qxb4#
- 1...Sd4
- 2.Rd7#
- 2.Qxd4#
- 1...Sa5
- 2.Rd7#
- 2.Qb4#
- 2.Qd4#
- 1...Sxe5
- 2.Qxe5#
- 1...Sa7
- 2.Rd7#
- 2.Qb4#
- 2.Qd4#
- 1...Sb8
- 2.Qb4#
- 2.Qd4#
- 1...Sd8
- 2.Rd7#
- 2.Qb4#
- 2.Qd4#
- 1...g5
- 2.Qf6#
- 1...g6
- 2.Qf6#
- 1...Sb4
- Tries
- 1.Rf5+?
- 1...Se5
- 2.Qxe5#
- 1...Kxe7!
- 1...Se5
- 1.Rg5+?
- 1...Se5
- 2.Qxe5#
- 1...Kxe7!
- 1...Se5
- 1.Rh5+?
- 1...Se5
- 2.Qxe5#
- 1...Kxe7!
- 1...Se5
- 1.R5e6+?
- 1...Kd5
- 2.Qd6#
- 2.Qc4#
- 1...Kc5!
- 1...Kd5
- 1.Qc4?
- threat
- 2.Qd5#
- 2.Qc5#
- 2.Qxc6#
- 1...Sxe7
- 2.Qc5#
- 1...Sb4
- 2.Qxb4#
- 2.Qc5#
- 2.Qc7#
- 1...Sd4
- 2.Qd5#
- 2.Qb4#
- 2.Qxd4#
- 2.Qc5#
- 2.Qc7#
- 1...Sa5
- 2.Qd3#
- 2.Qd5#
- 2.Qb4#
- 2.Qd4#
- 2.Qc5#
- 2.Qc7#
- 1...Sa7
- 2.Qd3#
- 2.Qd5#
- 2.Qb4#
- 2.Qd4#
- 2.Qc5#
- 2.Qc7#
- 1...Sb8
- 2.Qd3#
- 2.Qd5#
- 2.Qb4#
- 2.Qd4#
- 2.Qc5#
- 2.Qc7#
- 1...Sd8
- 2.Qd3#
- 2.Qd5#
- 2.Qb4#
- 2.Qd4#
- 2.Qc5#
- 2.Qc7#
- 1...Sxe5!
- threat
- 1.Qe4?
- threat
- 2.Rd5#
- 2.Qd5#
- 2.Qxc6#
- 1...Sxe5
- 2.Qxe5#
- 1...Sb4
- 2.Rd7#
- 2.Qxb4#
- 1...Sd4
- 2.Rd5#
- 2.Rd7#
- 2.Qd5#
- 2.Qxd4#
- 1...Sa5
- 2.Rd5#
- 2.Rd7#
- 2.Qd3#
- 2.Qd5#
- 2.Qb4#
- 2.Qd4#
- 1...Sa7
- 2.Rd5#
- 2.Rd7#
- 2.Qd3#
- 2.Qd5#
- 2.Qb4#
- 2.Qd4#
- 1...Sb8
- 2.Rd5#
- 2.Qd3#
- 2.Qd5#
- 2.Qb4#
- 2.Qd4#
- 1...Sd8
- 2.Rd5#
- 2.Rd7#
- 2.Qd3#
- 2.Qd5#
- 2.Qb4#
- 2.Qd4#
- 1...Sxe7!
- threat
- 1.Qf5?
- threat
- 2.Rd7#
- 2.Qd7#
- 1...Sxe5
- 2.Qxe5#
- 1...Sb8
- 2.Qd3#
- 1...Sxe7!
- threat
- 1.Qxf7?
- threat
- 2.Rd5#
- 2.R7e6#
- 2.Qd5#
- 2.Qe6#
- 2.Qg6#
- 1...Sxe7
- 2.Qxe7#
- 1...Sb4
- 2.R7e6#
- 2.Qe6#
- 2.Qg6#
- 1...Sd4
- 2.Rd5#
- 2.Qd5#
- 1...Sd8
- 2.Rd5#
- 2.Qd5#
- 1...g6
- 2.Rd5#
- 2.R7e6#
- 2.Qd5#
- 2.Qe6#
- 2.Qxg6#
- 2.Qf6#
- 1...Sxe5!
- threat
- 1.Rf5+?
- Keys
- 1.Qg5!
- threat
- 2.Rd5#
- 1...Sxe5
- 2.Qxe5#
- 1...Sxe7
- 2.Qxe7#
- 1...f5
- 2.Qg6#
- 1...Sb4
- 2.Rd7#
- 1...f6
- 2.R5e6#
- threat
- 1.Qg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- S(a);OGATE,P_SPINS(a),XR(D)::QAB1(B),XS(a)
- P(d);N_GUARD::QAR2(B)
- Tries
- Try
- R(D);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
- Refutation
- K(b);S_FLIGHT,XR(E)
- Try
- R(D);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
- Refutation
- K(b);S_FLIGHT,XR(E)
- Try
- R(D);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
- Refutation
- K(b);S_FLIGHT,XR(E)
- Try
- R(D);CHECK
- Refutation
- K(b);S_FLIGHT
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- S(a);XR(E)::QAB1(B)
- Refutation
- S(a);XR(D)
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- S(a);OGATE,XR(D)::QAB1(B),XS(a)
- Refutation
- S(a);XR(E)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- S(a);OGATE,XR(D)::QAB1(B),XS(a)
- S(a);N_GUARD::QAR(B)
- Refutation
- S(a);XR(E)
- Try
- Q(B);XP(c)
- Threat
- DUALS(5)
- Vars
- S(a);OGATE,XR(E)::QAB1(B),XS(a)
- Refutation
- S(a);XR(D)
- Try
- Actual
- Q(B);
- Threat
- R1(D)
- Vars
- S(a);OGATE,XR(D)::QAB1(B),XS(a)
- S(a);OGATE,XR(E)::QAB1(B),XS(a)
- P(c);N_GUARD::QAR(B)
- S(a);::R1(E)
- P(c);N_GUARD::R1(D)
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).