MESON Chess Problem Database
Problem Display
PID: 184343 (b5Qn/b2Rp2K/4B2p/n5pr/4k2P/5NP1/6P1/2rN4 w - - 0 1)
Alexander, Frederick Forrest Lawrie
British Chess Magazine, 1916
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Rc5
- 2.Rd4#
- 1...Bd4
- 2.Rxd4#
- 1...Bb8
- 2.Rd4#
- 1...Sc4
- 2.Qxa8#
- 1...Sg6
- 2.Qxg6#
- 1...Sf7
- 2.Qg6#
- 1...gxh4
- 2.Qg4#
- 1...g4
- 2.Qxg4#
- 1...Rc5
- Tries
- 1.Bg4?
- threat
- 2.Qe6#
- 1...Bd4
- 2.Rxd4#
- 1...Bd5
- 2.Qxd5#
- 1...Rc5
- 2.Rd4#
- 1...Rc6
- 2.Qd5#
- 1...Bb8
- 2.Rd4#
- 1...Sc4
- 2.Qxa8#
- 1...Sc6
- 2.Qd5#
- 1...Sg6
- 2.Qxg6#
- 1...Sf7
- 2.Qg6#
- 1...e5
- 2.Sd2#
- 1...e6
- 2.Qxe6#
- 1...gxh4!
- threat
- 1.Bd5+?
- 1...Kf5
- 2.Qe6#
- 1...Bxd5
- 2.Qxd5#
- 1...Kd3!
- 1...Kf5
- 1.Qxh8?
- threat
- 2.Sd2#
- 2.Qe5#
- 1...Rxd1
- 2.Qe5#
- 1...gxh4
- 2.Sd2#
- 1...Bd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Rc5
- 2.Sd2#
- 2.Rd4#
- 2.Qd4#
- 1...Rc2
- 2.Qe5#
- 1...Be3
- 2.Qe5#
- 1...Bb8
- 2.Sd2#
- 2.Rd4#
- 2.Qd4#
- 1...Sb3
- 2.Qe5#
- 1...Sc4
- 2.Qxa8#
- 1...Sc6
- 2.Sd2#
- 1...g4
- 2.Sd2#
- 1...Bd5!
- threat
- 1.Bg4?
- Keys
- 1.Bh3!
- threat
- 2.Qe6#
- 1...gxh4
- 2.Qg4#
- 1...Bd4
- 2.Rxd4#
- 1...Bd5
- 2.Qxd5#
- 1...g4
- 2.Qxg4#
- 1...Rc5
- 2.Rd4#
- 1...Rc6
- 2.Qd5#
- 1...Bb8
- 2.Rd4#
- 1...Sc4
- 2.Qxa8#
- 1...Sc6
- 2.Qd5#
- 1...Sg6
- 2.Qxg6#
- 1...Sf7
- 2.Qg6#
- 1...e5
- 2.Sd2#
- 1...e6
- 2.Qxe6#
- threat
- 1.Bh3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- R(a);S_CUTB(g)::R1(G)
- B(g);N_GUARD::R1(G),XB(g)
- B(g);N_GUARD::R1(G)
- S(c);N_GUARD,S_CUTR(a)::QAB(I),XB(i)
- S(j);N_GUARD::QAB(I),XS(j)
- S(j);N_GUARD::QAB(I)
- P(d);OGATE,XP(E)::QAR2(I)
- P(d);OGATE::QAR2(I),XP(d)
- Tries
- Try
- B(F);
- Threat
- QAR2(I)
- Vars
- B(g);N_GUARD::R1(G),XB(g)
- B(i);N_GUARD::QAB1(I),XB(i)
- R(a);S_CUTB(g)::R1(G)
- R(a);S_CUTB(i)::QAB1(I)
- B(g);N_GUARD::R1(G)
- S(c);N_GUARD,S_CUTR(a)::QAB(I),XB(i)
- S(c);S_CUTB(i)::QAB1(I)
- S(j);N_GUARD::QAB(I),XS(j)
- S(j);N_GUARD::QAB(I)
- P(h);SBLOCK::S(C)
- P(h);::QAR2(I),XP(h)
- Refutation
- P(d);XP(E)
- Try
- B(F);CHECK
- Vars
- K(b);S_FLIGHT::QAB1(I)
- B(i);OGATE,XB(F)::QAB1(I),XB(i)
- Refutation
- K(b);S_FLIGHT
- Try
- Q(I);XS(j)
- Threat
- DUALS(2)
- Vars
- R(a);XS(A)::QAR1(I)
- P(d);XP(E)::S(C)
- R(a);::QAR1(I)
- B(g);::QAR1(I)
- S(c);::QAR1(I)
- S(c);N_GUARD,S_CUTR(a)::QAB(I),XB(i)
- S(c);::S(C)
- P(d);::S(C)
- Refutation
- B(i);
- Try
- Actual
- B(F);
- Threat
- QAR2(I)
- Vars
- P(d);OGATE,XP(E)::QAR2(I)
- B(g);N_GUARD::R1(G),XB(g)
- B(i);N_GUARD::QAB1(I),XB(i)
- P(d);OGATE::QAR2(I),XP(d)
- R(a);S_CUTB(g)::R1(G)
- R(a);S_CUTB(i)::QAB1(I)
- B(g);N_GUARD::R1(G)
- S(c);N_GUARD,S_CUTR(a)::QAB(I),XB(i)
- S(c);S_CUTB(i)::QAB1(I)
- S(j);N_GUARD::QAB(I),XS(j)
- S(j);N_GUARD::QAB(I)
- P(h);SBLOCK::S(C)
- P(h);::QAR2(I),XP(h)
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).