MESON Chess Problem Database
Problem Display
PID: 71178 (2br3B/1p2p3/5R2/N3PRN1/pK1k4/3pp3/5nB1/5Q1r w - - 0 1)
Mackenzie, Arthur Ford
Illustrated London News, 1888
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Rh2
- 2.Qa1#
- 1...Rh3
- 2.Qa1#
- 1...Rh4
- 2.Qa1#
- 1...Rh5
- 2.Qa1#
- 1...Rh6
- 2.Qa1#
- 1...Rh7
- 2.Qa1#
- 1...Rhxh8
- 2.Qa1#
- 1...Rd7
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Sd1
- 2.Qf4#
- 1...Sg4
- 2.Qf4#
- 1...d2
- 2.Qc4#
- 1...e2
- 2.Qxf2#
- 1...a3
- 2.Sb3#
- 1...b5
- 2.Sc6#
- 1...b6
- 2.Sc6#
- 1...Rh2
- Tries
- 1.Bxb7?
- threat
- 2.Sf3#
- 1...e2
- 2.Qxf2#
- 1...Rh3
- 2.Qa1#
- 1...Rd5
- 2.Sc6#
- 1...Bxb7!
- threat
- 1.Rf4+?
- 1...Kxe5
- 2.Sc4#
- 2.Sf7#
- 1...Se4!
- 1...Kxe5
- 1.Qc1?
- threat
- 2.Qb2#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Bxf5
- 2.Qb2#
- 2.Qc3#
- 2.Qc5#
- 1...Se4
- 2.Qc4#
- 1...d2
- 2.Qc3#
- 2.Qc4#
- 1...Rd5
- 2.Qb2#
- 2.Qc3#
- 2.Qc4#
- 1...Be6
- 2.Sxe6#
- 2.Qb2#
- 2.Qc3#
- 2.Qc5#
- 1...Sd1
- 2.Qc4#
- 2.Qc5#
- 1...e2
- 2.Qc5#
- 1...a3
- 2.Sb3#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...b5
- 2.Sc6#
- 2.Qb2#
- 2.Qc3#
- 2.Qc5#
- 1...b6
- 2.Sc6#
- 2.Qb2#
- 2.Qc3#
- 2.Qc4#
- 1...Rxc1!
- threat
- 1.Bxb7?
- Keys
- 1.e6!
- 1...Rxf1
- 2.Rf8#
- 1...Rhxh8
- 2.Qa1#
- 1...Rdxh8
- 2.Rd5#
- 1...Bxe6
- 2.Sxe6#
- 1...exf6
- 2.Bxf6#
- 1...e2
- 2.Qxf2#
- 1...Rg1
- 2.Rf8#
- 1...Rh2
- 2.Qa1#
- 1...Rh3
- 2.Qa1#
- 1...Rh4
- 2.Qa1#
- 1...Rh5
- 2.Qa1#
- 1...Rh6
- 2.Qa1#
- 1...Rh7
- 2.Qa1#
- 1...Rd5
- 2.Rxd5#
- 1...Rd6
- 2.Rh6#
- 1...Rd7
- 2.Rh6#
- 1...Re8
- 2.Rd5#
- 1...Rf8
- 2.Rd5#
- 1...Rg8
- 2.Rd5#
- 1...Bd7
- 2.Rd5#
- 1...Sd1
- 2.Qf4#
- 1...Sh3
- 2.Rf8#
- 1...Se4
- 2.Sf3#
- 1...Sg4
- 2.Qf4#
- 1...d2
- 2.Qc4#
- 1...a3
- 2.Sb3#
- 1...b5
- 2.Sc6#
- 1...b6
- 2.Sc6#
- 1...Rxf1
- 1.e6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 12
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::QAB(A)
- R(a);N_GUARD,XB(I)::QAB(A)
- R(j);S_CUTB(i)::S(G)
- B(i);N_GUARD::S(G),XB(i)
- S(b);OGATE::QAR2(A)
- P(c);OGATE::QAR1(A)
- P(d);OGATEB::QAB(A),XS(b)
- P(e);N_GUARD::S(D)
- P(g);N_GUARD::S(D)
- Tries
- Try
- B(B);XP(g)
- Threat
- S(G)
- Vars
- P(d);OGATEB::QAB(A),XS(b)
- R(a);N_GUARD::QAB(A)
- R(j);SBLOCK::S(D)
- Refutation
- B(i);XB(B)
- Try
- R(F);CHECK
- Refutation
- S(b);P_SPINS(b)
- Try
- Q(A);
- Threat
- DUALS(4)
- Vars
- S(b);::QAR1(A)
- P(d);::QAB1(A)
- Refutation
- R(a);XQ(A)
- Try
- Actual
- P(E);
- Vars
- R(a);N_GUARD,XQ(A)::B(I)+R(H)
- R(a);N_GUARD,XB(I)::QAB(A)
- R(j);N_GUARD,XB(I)::R1(F)
- B(i);XP(E)::S(G),XB(i)
- P(h);OGATE,P_SPINP(h),XR(H)::B(I),XP(h)
- P(d);OGATEB::QAB(A),XS(b)
- R(a);N_GUARD::B(I)+R(H)
- R(a);N_GUARD::QAB(A)
- R(j);N_GUARD::R1(F),XR(j)
- R(j);N_GUARD::B(I)+R(H)
- R(j);N_GUARD::R1(F)
- B(i);S_CUTR(j)::R1(F)
- S(b);OGATE::QAR2(A)
- S(b);S_CUTR(a)::B(I)+R(H)
- S(b);SBLOCK::S(G)
- P(c);OGATE::QAR1(A)
- P(e);N_GUARD::S(D)
- P(g);N_GUARD::S(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).