MESON Chess Problem Database
Problem Display
PID: 140385 (4R1Nr/6kp/3pP2N/1p2p1PK/1p2B1p1/nP1PnpB1/R1P4p/7Q w - - 0 1)
Lawton, Howard
The Problemist, 1943
#2
13 + 12
SOLUTION
- SOUND
- Sets
- 1...Rxg8
- 2.Rxg8#
- 1...Sb1
- 2.Ra7#
- 1...Saxc2
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sexc2
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...d5
- 2.Bxe5#
- 1...Rxg8
- Tries
- 1.Bxf3?
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.Ra7#
- 1...Sexc2
- 2.Sf5#
- 1...Sb1
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...e4
- 2.Qa1#
- 1...d5
- 2.Bxe5#
- 1...gxf3!
- 1...Rxg8
- 1.Bd5?
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.Ra7#
- 1...Sexc2
- 2.Sf5#
- 1...Sxd5
- 2.Sf5#
- 1...Sb1
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...e4
- 2.Qa1#
- 1...f2!
- 1...Rxg8
- 1.Bc6?
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.Ra7#
- 1...Sexc2
- 2.Sf5#
- 1...Sb1
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...e4
- 2.Qa1#
- 1...d5
- 2.Bxe5#
- 1...f2!
- 1...Rxg8
- 1.Bg6?
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.Ra7#
- 1...Sexc2
- 2.Sf5#
- 1...f2
- 2.Qb7#
- 1...Sb1
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...e4
- 2.Qa1#
- 1...d5
- 2.Bxe5#
- 1...hxg6+!
- 1...Rxg8
- 1.Ra1?
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.Ra7#
- 1...Sexc2
- 2.Sf5#
- 1...Sb1
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...d5
- 2.Bxe5#
- 1...f2!
- 1...Rxg8
- 1.Rxa3?
- threat
- 2.Ra7#
- 1...Rxg8
- 2.Rxg8#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...bxa3!
- threat
- 1.Ra8?
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.R2a7#
- 1...Sexc2
- 2.Sf5#
- 1...Sb1
- 2.R2a7#
- 1...Sac4
- 2.R2a7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...d5
- 2.Bxe5#
- 1...f2!
- 1...Rxg8
- 1.Rb8?
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.Ra7#
- 1...Sexc2
- 2.Sf5#
- 1...Sb1
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...d5
- 2.Bxe5#
- 1...f2!
- 1...Rxg8
- 1.Rc8?
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.Ra7#
- 1...Sexc2
- 2.Sf5#
- 1...Sb1
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...d5
- 2.Bxe5#
- 1...f2!
- 1...Rxg8
- 1.Rd8?
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.Ra7#
- 1...Sexc2
- 2.Sf5#
- 1...Sb1
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...d5
- 2.Bxe5#
- 1...f2!
- 1...Rxg8
- 1.Rf8?
- threat
- 2.Rf7#
- 1...Rxg8
- 2.Rxg8#
- 1...Kxf8!
- threat
- 1.Qxh2?
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.Ra7#
- 1...Sexc2
- 2.Sf5#
- 1...Sb1
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...d5
- 2.Bxe5#
- 1...f2!
- 1...Rxg8
- 1.Bxf3?
- Keys
- 1.Ba8!
- 1...Rxg8
- 2.Rxg8#
- 1...Saxc2
- 2.Ra7#
- 1...Sexc2
- 2.Sf5#
- 1...f2
- 2.Qb7#
- 1...Sb1
- 2.Ra7#
- 1...Sac4
- 2.Ra7#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sec4
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...e4
- 2.Qa1#
- 1...d5
- 2.Bxe5#
- 1...Rxg8
- 1.Ba8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE::R(B)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD,XP(C)::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(i);N_GUARD::B(F),XP(h)
- Tries
- Try
- B(G);XP(d)
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(h);OGATEB::QAB(A)
- P(i);N_GUARD::B(F),XP(h)
- Refutation
- P(f);XB(G)
- Try
- B(G);
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- S(c);N_GUARD,XB(G)::S(K)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(h);OGATEB::QAB(A)
- Refutation
- P(d);
- Try
- B(G);
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(h);OGATEB::QAB(A)
- P(i);N_GUARD::B(F),XP(h)
- Refutation
- P(d);
- Try
- B(G);
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- P(d);OGATE::QAR(A)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(h);OGATEB::QAB(A)
- P(i);N_GUARD::B(F),XP(h)
- Refutation
- P(k);CHECK,P_PINS(K),XB(G)
- Try
- R(B);
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(i);N_GUARD::B(F),XP(h)
- Refutation
- P(d);
- Try
- R(B);XS(b)
- Threat
- R(B)
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- Refutation
- P(e);XR(B)
- Try
- R(L);
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(i);N_GUARD::B(F),XP(h)
- Refutation
- P(d);
- Try
- R(L);
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(i);N_GUARD::B(F),XP(h)
- Refutation
- P(d);
- Try
- R(L);
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(i);N_GUARD::B(F),XP(h)
- Refutation
- P(d);
- Try
- R(L);
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(i);N_GUARD::B(F),XP(h)
- Refutation
- P(d);
- Try
- R(L);
- Threat
- R1(L)
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- Refutation
- K(j);S_FLIGHT,XR(L)
- Try
- Q(A);XP(a)
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(i);N_GUARD::B(F),XP(h)
- Refutation
- P(d);
- Try
- Actual
- B(G);
- Vars
- R(l);OGATE,XS(M)::R1(L),XR(l)
- S(b);OGATE,XP(C)::R(B)
- S(c);N_GUARD,XP(C)::S(K)
- P(d);OGATE::QAR(A)
- S(b);OGATE::R(B)
- S(c);N_GUARD::S(K)
- S(c);N_GUARD::S(K),XS(c)
- P(h);OGATEB::QAB(A)
- P(i);N_GUARD::B(F),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).