MESON Chess Problem Database
Problem Display
PID: 275461 (K6b/pp2N1n1/q6p/2NQ4/5k1P/4p3/3nP3/6Rb w - - 0 1)
Andrade, Barry Jack da Costa
British Chess Magazine, 1935
#2
7 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxe2
- 2.Sg6#
- 1...Qd3
- 2.Sxd3#
- 1...Qc4
- 2.Sg6#
- 2.Qd6#
- 1...Qb5
- 2.Sg6#
- 2.Qd6#
- 1...Qa1
- 2.Sd3#
- 2.Sg6#
- 1...Qa2
- 2.Sd3#
- 2.Sg6#
- 2.Qd6#
- 1...Qa3
- 2.Sg6#
- 2.Qd6#
- 1...Qa4
- 2.Sd3#
- 2.Sg6#
- 2.Qd6#
- 1...Qa5
- 2.Sd3#
- 2.Sg6#
- 2.Qd6#
- 1...Qb6
- 2.Sd3#
- 1...Qc6
- 2.Sd3#
- 1...Qd6
- 2.Sd3#
- 2.Qxd6#
- 1...Qe6
- 2.Sd3#
- 1...Qf6
- 2.Sd3#
- 1...Qg6
- 2.Sxg6#
- 1...Sf3
- 2.Qe4#
- 1...Sc4
- 2.Sd3#
- 1...Sf5
- 2.Qxf5#
- 1...Sh5
- 2.Qf5#
- 1...Se6
- 2.Sg6#
- 2.Qf5#
- 1...Se8
- 2.Qf5#
- 1...h5
- 2.Qg5#
- 1...b5
- 2.Sd3#
- 1...b6
- 2.Sg6#
- 1...Qxe2
- Tries
- 1.Se6+?
- 1...Sxe6
- 2.Sg6#
- 2.Qf5#
- 1...Qxe6!
- 1...Sxe6
- 1.Rg2?
- 1...Qxe2
- 2.Sg6#
- 1...Qd3
- 2.Sxd3#
- 1...Qc4
- 2.Sg6#
- 2.Qd6#
- 1...Qb5
- 2.Sg6#
- 2.Qd6#
- 1...Qa1
- 2.Sd3#
- 2.Sg6#
- 1...Qa2
- 2.Sd3#
- 2.Sg6#
- 2.Qd6#
- 1...Qa3
- 2.Sg6#
- 2.Qd6#
- 1...Qa4
- 2.Sd3#
- 2.Sg6#
- 2.Qd6#
- 1...Qa5
- 2.Sd3#
- 2.Sg6#
- 2.Qd6#
- 1...Qb6
- 2.Sd3#
- 1...Qc6
- 2.Sd3#
- 1...Qd6
- 2.Sd3#
- 2.Qxd6#
- 1...Qe6
- 2.Sd3#
- 1...Qf6
- 2.Sd3#
- 1...Qg6
- 2.Sxg6#
- 1...Sb1
- 2.Qe4#
- 2.Qd4#
- 1...Sf1
- 2.Qe4#
- 2.Qd4#
- 1...Sb3
- 2.Qe4#
- 1...Sf3
- 2.Qe4#
- 1...Sc4
- 2.Sd3#
- 2.Qe4#
- 2.Qd4#
- 1...Se4
- 2.Qxe4#
- 1...Sf5
- 2.Qxf5#
- 1...Sh5
- 2.Qf5#
- 1...Se6
- 2.Sg6#
- 2.Qf5#
- 1...Se8
- 2.Qf5#
- 1...h5
- 2.Qg5#
- 1...b5
- 2.Sd3#
- 1...b6
- 2.Sg6#
- 2.Qd6#
- 1...Bxg2!
- 1...Qxe2
- 1.Se6+?
- Keys
- 1.Rg5!
- threat
- 2.Qe5#
- 1...Qxe2
- 2.Sg6#
- 1...Bxd5
- 2.Sxd5#
- 1...hxg5
- 2.Qxg5#
- 1...Qa1
- 2.Sd3#
- 2.Sg6#
- 1...Qd6
- 2.Sd3#
- 2.Qxd6#
- 1...Qe6
- 2.Sd3#
- 1...Qf6
- 2.Sd3#
- 1...Sf3
- 2.Qe4#
- 1...Sc4
- 2.Sd3#
- 1...Sf5
- 2.Qxf5#
- 1...Sh5
- 2.Qf5#
- 1...Se6
- 2.Sg6#
- 2.Qf5#
- 1...Se8
- 2.Qf5#
- 1...b5
- 2.Sd3#
- 1...b6
- 2.Sg6#
- threat
- 1.Rg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- Q(e);N_GUARD,XP(B)::S(F)
- Q(e);N_GUARD::S(D),XQ(e)
- Q(e);N_GUARD::S(D)
- Q(e);N_GUARD::S(F),XQ(e)
- S(b);N_GUARD,S_CUTB(a)::QAR1(E)
- S(b);S_CUTQ(e)::S(D)
- S(i);N_GUARD::QAR1(E),XS(i)
- S(i);N_GUARD::QAR1(E)
- P(f);N_GUARD::QAB1(E)
- P(h);P_PINQ(E),S_CUTQ(e)::S(D)
- P(h);P_PINQ(E),S_CUTQ(e)::S(F)
- Tries
- Try
- S(D);CHECK
- Refutation
- Q(e);XS(D)
- Try
- R(A);
- Vars
- Q(e);N_GUARD,XP(B)::S(F)
- Q(e);N_GUARD::S(D),XQ(e)
- Q(e);N_GUARD::S(D)
- Q(e);N_GUARD::S(F),XQ(e)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- S(i);N_GUARD::QAR1(E),XS(i)
- S(i);N_GUARD::QAR1(E)
- P(f);N_GUARD::QAB1(E)
- P(h);S_CUTQ(e)::S(D)
- Refutation
- B(a);XR(A)
- Try
- Actual
- R(A);
- Threat
- QAB1(E)
- Vars
- Q(e);N_GUARD,XP(B)::S(F)
- B(a);XQ(E)::S(F),XB(a)
- P(f);OGATE,XR(A)::QAB1(E),XP(f)
- Q(e);N_GUARD::S(D)
- S(b);N_GUARD,S_CUTB(a)::QAR1(E)
- S(b);S_CUTQ(e)::S(D)
- S(i);N_GUARD::QAR1(E),XS(i)
- S(i);N_GUARD::QAR1(E)
- P(h);P_PINQ(E),S_CUTQ(e)::S(D)
- P(h);P_PINQ(E),S_CUTQ(e)::S(F)
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).