MESON Chess Problem Database
Problem Display
PID: 48551 (8/3r1r2/1R6/3k1pQ1/1PN3R1/1P2PK2/4n3/2n3bB w - - 0 1)
Alexander, Frederick Forrest Lawrie
British Chess Magazine, 1911
#2
9 + 7
| 56 | The Problemist | 1929 |
| 312 | Evening News | 1933 |
SOLUTION
- SOUND
- Sets
- 1...Rd6
- 2.Rxd6#
- 1...Ra7
- 2.Rd6#
- 1...Rb7
- 2.Rd6#
- 1...Rc7
- 2.Rd6#
- 1...Rde7
- 2.Rd6#
- 1...Rg7
- 2.Qxf5#
- 1...Rh7
- 2.Qxf5#
- 1...Bf2
- 2.Kxf2#
- 1...Bh2
- 2.Kf2#
- 1...Bxe3
- 2.Kxe3#
- 1...Sa2
- 2.Kxe2#
- 1...Sxb3
- 2.Kxe2#
- 1...Sd3
- 2.Kxe2#
- 1...Sc3
- 2.Rd4#
- 1...Sg3
- 2.Kxg3#
- 2.Rd4#
- 1...Sd4+
- 2.Rxd4#
- 1...Sf4
- 2.Kxf4#
- 1...Rd6
- Tries
- 1.Rb5+?
- 1...Ke6
- 2.Re5#
- 1...Kc6!
- 1...Ke6
- 1.Qf4?
- threat
- 2.Qe5#
- 1...Sd4+
- 2.Qxd4#
- 1...fxg4+
- 2.Kxg4#
- 1...Sxf4
- 2.Kxf4#
- 1...Rde7
- 2.Rd6#
- 2.Qd6#
- 1...Bh2
- 2.Kf2#
- 1...Sd3
- 2.Kxe2#
- 1...Rfe7!
- threat
- 1.Qf6?
- threat
- 2.Rb5#
- 2.Qe5#
- 2.Qc6#
- 2.Qe6#
- 1...Sd4+
- 2.Rxd4#
- 2.Qxd4#
- 1...fxg4+
- 2.Kxg4#
- 1...Bxe3
- 2.Kxe3#
- 2.Sxe3#
- 2.Qe5#
- 2.Qc6#
- 2.Qe6#
- 1...Sxb3
- 2.Kxe2#
- 2.Qe5#
- 2.Qc6#
- 2.Qe6#
- 1...Rfe7
- 2.Rb5#
- 2.Qc6#
- 1...Rd6
- 2.Rxd6#
- 2.Qe5#
- 2.Qxd6#
- 1...Rb7
- 2.Rd6#
- 2.Qe5#
- 2.Qc6#
- 2.Qd6#
- 2.Qe6#
- 1...Rc7
- 2.Rd6#
- 2.Qe5#
- 2.Qd6#
- 2.Qe6#
- 1...Rde7
- 2.Rb5#
- 2.Rd6#
- 2.Qc6#
- 2.Qd6#
- 1...Bh2
- 2.Kf2#
- 2.Rb5#
- 2.Qc6#
- 2.Qe6#
- 1...Sd3
- 2.Kxe2#
- 2.Qc6#
- 2.Qe6#
- 1...Sc3
- 2.Rd4#
- 2.Qd4#
- 2.Qe5#
- 2.Qc6#
- 2.Qe6#
- 1...Sf4
- 2.Kxf4#
- 2.Rb5#
- 2.Qd4#
- 2.Qe5#
- 2.Qc6#
- 1...Rxf6!
- threat
- 1.Rb5+?
- Keys
- 1.Qg8!
- 1...Sd4+
- 2.Rxd4#
- 1...fxg4+
- 2.Kxg4#
- 1...Bxe3
- 2.Kxe3#
- 1...Sxb3
- 2.Kxe2#
- 1...Rd6
- 2.Rxd6#
- 1...Ra7
- 2.Rd6#
- 1...Rb7
- 2.Rd6#
- 1...Rc7
- 2.Rd6#
- 1...Re7
- 2.Rd6#
- 1...Rd8
- 2.Qxf7#
- 1...Bf2
- 2.Kxf2#
- 1...Bh2
- 2.Kf2#
- 1...Sa2
- 2.Kxe2#
- 1...Sd3
- 2.Kxe2#
- 1...Sc3
- 2.Rd4#
- 1...Sg3
- 2.Kxg3#
- 2.Rd4#
- 1...Sf4
- 2.Kxf4#
- 1...f4
- 2.Rg5#
- 1...Sd4+
- 1.Qg8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- R(f);N_GUARD::R1(I),XR(f)
- R(f);N_GUARD::R1(I)
- R(g);N_GUARD::QAR2(H),XP(e)
- B(b);::B(A)+K(D),XB(b)
- B(b);::B(A)+K(D)
- B(b);XP(C)::B(A)+K(D),XB(b)
- S(a);::B(A)+K(D),XS(c)
- S(a);XP(B)::B(A)+K(D),XS(c)
- S(c);N_GUARD::R1(G)
- S(c);CHECK,N_GUARD::R1(G),XS(c)
- S(c);::B(A)+K(D),XS(c)
- Tries
- Try
- R(I);CHECK
- Vars
- K(d);N_SPINP(e),OGATE,S_FLIGHT::R1(I)
- Refutation
- K(d);N_SPINP(e),S_FLIGHT
- Try
- Q(H);N_PINP(e)
- Threat
- QAR1(H)
- Vars
- S(c);CHECK,N_GUARD::QAR1(H),XS(c)
- P(e);CHECK,P_PINQ(H),XR(G)::B(A)+K(D),XP(e)
- S(c);XQ(H)::B(A)+K(D),XS(c)
- B(b);::B(A)+K(D)
- S(a);::B(A)+K(D),XS(c)
- Refutation
- R(g);
- Try
- Q(H);N_PINP(e)
- Threat
- DUALS(4)
- Vars
- P(e);CHECK,P_PINQ(H),XR(G)::B(A)+K(D),XP(e)
- Refutation
- R(g);XQ(H)
- Try
- Actual
- Q(H);N_PINP(e),P_PINR(g)
- Vars
- S(c);CHECK,N_GUARD::R1(G),XS(c)
- P(e);CHECK,XR(G)::B(A)+K(D),XP(e)
- B(b);XP(C)::B(A)+K(D),XB(b)
- S(a);XP(B)::B(A)+K(D),XS(c)
- R(f);N_GUARD::R1(I),XR(f)
- R(f);N_GUARD::R1(I)
- R(f);N_GUARD::QAB(H),XR(g)
- B(b);::B(A)+K(D),XB(b)
- B(b);::B(A)+K(D)
- S(a);::B(A)+K(D),XS(c)
- S(c);N_GUARD::R1(G)
- S(c);::B(A)+K(D),XS(c)
- P(e);OGATEB::R(G)
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).