MESON Chess Problem Database
Problem Display
PID: 51243 (1BR5/7n/2BP4/2kq4/1R1p4/P7/3Q4/b5K1 w - - 0 1)
Andrade, Barry Jack da Costa
Manchester Guardian, 1955
#2
8 + 5
SOLUTION
- SOUND
- Sets
- 1...Qh1+
- 2.Bxh1#
- 1...Qa2
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 1...Qg2+
- 2.Bxg2#
- 1...Qb3
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 1...Qf3
- 2.Bxf3#
- 2.Be4#
- 1...Qc4
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 1...Qe4
- 2.Bxe4#
- 1...Qe5
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 1...Qg5+
- 2.Bg2#
- 1...Qh5
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 1...Qxd6
- 2.Ba7#
- 1...Qh1+
- Tries
- 1.Qc1+?
- 1...Qc4
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 2.Rb5#
- 2.Qxc4#
- 1...Bc3!
- 1...Qc4
- 1.Qg5?
- threat
- 2.Ba4#
- 2.Bxd5#
- 2.Bb7#
- 2.Bd7#
- 2.Ba8#
- 2.Be8#
- 2.Qxd5#
- 1...Qxg5+
- 2.Bg2#
- 1...Qe5
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 2.Qxe5#
- 1...Qf5
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 2.Qxf5#
- 1...Sf6
- 2.Ba4#
- 2.Bxd5#
- 2.Bb7#
- 2.Bd7#
- 2.Ba8#
- 2.Be8#
- 1...Sxg5!
- threat
- 1.Qa2?
- threat
- 2.Bxd5#
- 2.Rb5#
- 2.Qxd5#
- 1...Qh1+
- 2.Bxh1#
- 1...Qg2+
- 2.Bxg2#
- 1...Qg5+
- 2.Bg2#
- 1...Qxa2
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 1...Qxc6
- 2.Qc4#
- 1...Qxd6
- 2.Ba7#
- 2.Rb5#
- 2.Qc4#
- 1...Qb3
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 1...Qf3
- 2.Bxf3#
- 2.Be4#
- 2.Bd5#
- 2.Rb5#
- 2.Qc4#
- 1...Qc4
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 2.Qxc4#
- 1...Qe4
- 2.Bxe4#
- 2.Bd5#
- 2.Rb5#
- 2.Qc4#
- 1...Qe6
- 2.Bd7#
- 2.Rb5#
- 1...Qf7
- 2.Bd7#
- 2.Rb5#
- 1...Qe5
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bd5#
- 2.Bb7#
- 2.Bd7#
- 2.Ba8#
- 2.Be8#
- 2.Rb5#
- 2.Qc4#
- 1...Qf5
- 2.Bd7#
- 2.Rb5#
- 2.Qc4#
- 1...Qh5
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bd5#
- 2.Bb7#
- 2.Bd7#
- 2.Ba8#
- 2.Be8#
- 2.Rb5#
- 2.Qc4#
- 1...Sf6
- 2.Bxd5#
- 2.Rb5#
- 1...d3
- 2.Bxd5#
- 2.Qxd5#
- 1...Qg8+!
- threat
- 1.Qc2+?
- 1...Qc4
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 2.Rb5#
- 2.Qxc4#
- 1...Bc3!
- 1...Qc4
- 1.Qd3?
- threat
- 2.Rb5#
- 2.Qb5#
- 1...Qh1+
- 2.Bxh1#
- 1...Qg2+
- 2.Bxg2#
- 1...Qg5+
- 2.Bg2#
- 1...Qb3
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 2.Qb5#
- 1...Qc4
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Be4#
- 2.Bb7#
- 2.Ba8#
- 2.Qxc4#
- 1...Qg8+!
- threat
- 1.Qc1+?
- Keys
- 1.Qg2!
- threat
- 2.Bxd5#
- 2.Qxd5#
- 1...Qxg2+
- 2.Bxg2#
- 1...Qxc6
- 2.Rxc6#
- 2.Qxc6#
- 1...Qxd6
- 2.Ba7#
- 1...Qa2
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bd5#
- 2.Bb7#
- 2.Bd7#
- 2.Ba8#
- 2.Be8#
- 1...Qb3
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bd5#
- 2.Bb7#
- 2.Bd7#
- 2.Ba8#
- 2.Be8#
- 1...Qf3
- 2.Bxf3#
- 2.Be4#
- 1...Qc4
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bd5#
- 2.Bb7#
- 2.Bd7#
- 2.Ba8#
- 2.Be8#
- 1...Qe4
- 2.Bxe4#
- 1...Qe6
- 2.Bd7#
- 1...Qf7
- 2.Bd7#
- 1...Qg8
- 2.Be8#
- 1...Qe5
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bd5#
- 2.Bb7#
- 2.Bd7#
- 2.Ba8#
- 2.Be8#
- 1...Qf5
- 2.Bd7#
- 1...Qg5
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bd5#
- 2.Bb7#
- 2.Bd7#
- 2.Ba8#
- 2.Be8#
- 1...Qh5
- 2.Bf3#
- 2.Ba4#
- 2.Be4#
- 2.Bd5#
- 2.Bb7#
- 2.Bd7#
- 2.Ba8#
- 2.Be8#
- 1...Sf6
- 2.Bxd5#
- threat
- 1.Qg2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 2
- Sets
- Q(d);CHECK,OGATE::R(H)+B(E),XQ(d)
- Q(d);OGATE::R(H)+B(E),XQ(d)
- Q(d);CHECK,OGATE::R(H)+B(E)
- Q(d);SBLOCK,XP(F)::B(G)
- Tries
- Try
- Q(B);CHECK
- Refutation
- B(a);P_SPINB(a)
- Try
- Q(B);P_PINQ(d)
- Threat
- DUALS(7)
- Vars
- Q(d);CHECK,N_SPINQ(d),OGATE,XQ(B)::R(H)+B(E)
- Refutation
- S(e);N_SPINQ(d),XQ(B)
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- Q(d);CHECK,OGATE::R(H)+B(E),XQ(d)
- Q(d);CHECK,OGATE::R(H)+B(E)
- Q(d);N_GUARD,P_SPINQ(d),XB(E)::QAR1(B)
- Refutation
- Q(d);CHECK
- Try
- Q(B);CHECK
- Refutation
- B(a);P_SPINB(a)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,OGATE::R(H)+B(E),XQ(d)
- Q(d);CHECK,OGATE::R(H)+B(E)
- Refutation
- Q(d);CHECK
- Try
- Actual
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,OGATE,XQ(B)::R(H)+B(E),XQ(d)
- Q(d);SBLOCK,XP(F)::B(G)
- Q(d);OGATE::R(H)+B(E),XQ(d)
- Q(d);N_GUARD::R(H)+B(E)
- Q(d);N_GUARD,P_PINQ(B)::R(H)+B(E)
- S(e);::R(H)+B(E),XQ(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).