MESON Chess Problem Database
Problem Display
PID: 72177 (8/3bn3/6p1/6R1/r3k3/1Q1p2P1/4NK2/8 w - - 0 1)
Triggs, D
Chess, 1952
#2
5 + 6
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qc4#
- 2.Qb4#
- 1...Ra2
- 2.Qc4#
- 2.Qb4#
- 1...Ra3
- 2.Qc4#
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Sc3#
- 1...Ra5
- 2.Qc4#
- 2.Qb4#
- 1...Ra6
- 2.Qc4#
- 2.Qb4#
- 1...Ra7
- 2.Qc4#
- 2.Qb4#
- 1...Ra8
- 2.Qc4#
- 2.Qb4#
- 1...Bh3
- 2.Qxa4#
- 1...Bg4
- 2.Qxa4#
- 1...Bb5
- 2.Qe6#
- 1...Bc6
- 2.Qe6#
- 1...Be6
- 2.Qxe6#
- 1...Bc8
- 2.Qxa4#
- 1...Be8
- 2.Qe6#
- 1...Sd5
- 2.Qxd5#
- 1...Sc6
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...dxe2
- 2.Qe3#
- 1...d2
- 2.Qc2#
- 2.Qb1#
- 2.Qe3#
- 2.Qf3#
- 1...Ra1
- Tries
- 1.Rc5?
- 1...dxe2
- 2.Qe3#
- 1...Sd5
- 2.Qxd5#
- 1...Ra1
- 2.Qc4#
- 2.Qb4#
- 1...Ra2
- 2.Qc4#
- 2.Qb4#
- 1...Ra3
- 2.Qc4#
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Sc3#
- 1...Ra5
- 2.Qc4#
- 2.Qb4#
- 1...Ra6
- 2.Qc4#
- 2.Qb4#
- 1...Ra7
- 2.Qc4#
- 2.Qb4#
- 1...Ra8
- 2.Qc4#
- 2.Qb4#
- 1...Bh3
- 2.Qxa4#
- 1...Bg4
- 2.Qxa4#
- 1...Bb5
- 2.Qe6#
- 1...Bf5
- 2.Qxa4#
- 1...Bc6
- 2.Qe6#
- 1...Be6
- 2.Qxe6#
- 1...Bc8
- 2.Qxa4#
- 1...Be8
- 2.Qe6#
- 1...Sf5
- 2.Qd5#
- 1...Sc6
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...d2
- 2.Qc2#
- 2.Qb1#
- 2.Qe3#
- 2.Qf3#
- 1...g5!
- 1...dxe2
- 1.Rd5?
- threat
- 2.Sc3#
- 2.Qxd3#
- 1...dxe2
- 2.Qd3#
- 2.Qf3#
- 1...Rc4
- 2.Qxc4#
- 2.Qxd3#
- 1...Ra2
- 2.Qc4#
- 2.Qxd3#
- 1...Ra3
- 2.Sc3#
- 2.Qc4#
- 1...Rd4
- 2.Sc3#
- 1...Bb5
- 2.Sc3#
- 1...d2
- 2.Sc3#
- 2.Qd3#
- 2.Qf3#
- 1...Sxd5!
- threat
- 1.Qb7+?
- 1...Bc6
- 2.Qxe7#
- 1...Sd5
- 2.Qxd5#
- 1...Sc6!
- 1...Bc6
- 1.Rc5?
- Keys
- 1.Rb5!
- threat
- 2.Qxa4#
- 1...Bxb5
- 2.Qe6#
- 1...dxe2
- 2.Qe3#
- 1...Sd5
- 2.Qxd5#
- 1...Ra1
- 2.Qc4#
- 2.Qb4#
- 1...Ra2
- 2.Qc4#
- 2.Qb4#
- 1...Ra3
- 2.Qc4#
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Sc3#
- 1...Ra5
- 2.Qc4#
- 2.Qb4#
- 1...Ra6
- 2.Qc4#
- 2.Qb4#
- 1...Ra7
- 2.Qc4#
- 2.Qb4#
- 1...Ra8
- 2.Qc4#
- 2.Qb4#
- 1...Be6
- 2.Qxe6#
- 1...Sf5
- 2.Qd5#
- 1...Sc6
- 2.Qd5#
- 1...d2
- 2.Qc2#
- 2.Qb1#
- 2.Qe3#
- 2.Qf3#
- threat
- 1.Rb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 7
- Sets
- R(b);N_GUARD::QAR(C),XR(b)
- R(b);N_GUARD::QAR2(C),XR(b)
- R(b);SBLOCK::S(A)
- B(e);N_GUARD::QAR(C),XR(b)
- B(e);N_GUARD::QAR2(C)
- B(e);N_GUARD::QAR2(C),XB(e)
- S(f);N_GUARD::QAB1(C),XS(f)
- S(f);N_GUARD::QAB1(C)
- P(a);OGATE,XS(A)::QAR1(C)
- Tries
- Try
- R(E);
- Vars
- P(a);OGATE,XS(A)::QAR1(C)
- S(f);N_GUARD::QAB1(C),XS(f)
- R(b);N_GUARD::QAR(C),XR(b)
- R(b);N_GUARD::QAR2(C),XR(b)
- R(b);SBLOCK::S(A)
- B(e);N_GUARD::QAR(C),XR(b)
- B(e);N_GUARD::QAR2(C)
- B(e);N_GUARD::QAR2(C),XB(e)
- S(f);N_GUARD::QAB1(C)
- Refutation
- P(d);
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- R(b);::S(A)
- B(e);::S(A)
- Refutation
- S(f);XR(E)
- Try
- Q(C);CHECK
- Vars
- B(e);OGATE,P_SPINB(e)::QAR(C),XS(f)
- S(f);N_GUARD,P_SPINS(f)::QAB1(C),XS(f)
- Refutation
- S(f);P_SPINS(f)
- Try
- Actual
- R(E);
- Threat
- QAR(C),XR(b)
- Vars
- B(e);N_GUARD,XR(E)::QAR2(C)
- P(a);OGATE,XS(A)::QAR1(C)
- S(f);N_GUARD::QAB1(C),XS(f)
- R(b);N_GUARD::QAR(C),XR(b)
- R(b);N_GUARD::QAR2(C),XR(b)
- R(b);SBLOCK::S(A)
- B(e);N_GUARD::QAR2(C),XB(e)
- S(f);N_GUARD::QAB1(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).