MESON Chess Problem Database
Problem Display
PID: 18067 (4b1Q1/2B1R3/PpkP2N1/1nr1P1p1/B5P1/3N4/n7/KR6 w - - 0 1)
Boswell, Edward
Lewis, Robert Tony
4th Prize, Chess, 1953
#2
12 + 7
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Bxb5#
- 1...Rc2
- 2.Bxb5#
- 1...Rc3
- 2.Bxb5#
- 1...Rc4
- 2.Bxb5#
- 2.Qxc4#
- 1...Rd5
- 2.Qxe8#
- 1...Rxe5
- 2.Sgxe5#
- 1...Bxg6
- 2.Qa8#
- 1...Bd7
- 2.Qa8#
- 1...Bf7
- 2.Qa8#
- 1...Sc1
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Rc1
- Tries
- 1.Sgf4?
- threat
- 2.Qxe8#
- 1...Bh5
- 2.Qa8#
- 1...Bg6
- 2.Qa8#
- 1...Bd7
- 2.Qa8#
- 1...Bf7
- 2.Qa8#
- 1...gxf4!
- threat
- 1.Sh8?
- 1...Bf7
- 2.Qa8#
- 1...Rc1
- 2.Bxb5#
- 1...Rc2
- 2.Bxb5#
- 1...Rc3
- 2.Bxb5#
- 1...Rc4
- 2.Bxb5#
- 2.Qxc4#
- 1...Rd5
- 2.Qxe8#
- 1...Bh5
- 2.Qa8#
- 1...Bg6
- 2.Qa8#
- 1...Bd7
- 2.Qa8#
- 1...Sc1
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Rxe5!
- 1...Bf7
- 1.Rb2?
- 1...Rxe5
- 2.Sgxe5#
- 1...Bxg6
- 2.Qa8#
- 1...Bf7
- 2.Qa8#
- 1...Rc2
- 2.Bxb5#
- 1...Rc3
- 2.Bxb5#
- 1...Rc4
- 2.Bxb5#
- 2.Qxc4#
- 1...Rd5
- 2.Qxe8#
- 1...Bd7
- 2.Qa8#
- 1...Sc1
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Rc1+!
- 1...Rxe5
- 1.Rb3?
- 1...Rxe5
- 2.Sgxe5#
- 1...Bxg6
- 2.Qa8#
- 1...Bf7
- 2.Qa8#
- 1...Rc2
- 2.Bxb5#
- 1...Rc3
- 2.Bxb5#
- 1...Rc4
- 2.Bxb5#
- 2.Qxc4#
- 1...Rd5
- 2.Qxe8#
- 1...Bd7
- 2.Qa8#
- 1...Sc1
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Rc1+!
- 1...Rxe5
- 1.Rxb5?
- threat
- 2.Rxc5#
- 2.Rxb6#
- 1...Rxb5
- 2.Qc4#
- 1...Rxe5
- 2.Sdxe5#
- 2.Sgxe5#
- 2.Rc5#
- 2.Rxb6#
- 2.Qxe8#
- 1...Bf7
- 2.Rxc5#
- 2.Qa8#
- 1...Rc2
- 2.Rc5#
- 2.Rxb6#
- 2.Qd5#
- 2.Qxe8#
- 1...Rc3
- 2.Rc5#
- 2.Rxb6#
- 2.Qd5#
- 2.Qxe8#
- 1...Rc4
- 2.Rc5#
- 2.Rxb6#
- 2.Qxc4#
- 2.Qd5#
- 2.Qxe8#
- 1...Rd5
- 2.Rc5#
- 2.Rxb6#
- 2.Qxd5#
- 2.Qxe8#
- 1...Rc1+!
- threat
- 1.Rg7?
- 1...Rxe5
- 2.Sgxe5#
- 1...Bxg6
- 2.Qa8#
- 1...Rc2
- 2.Bxb5#
- 1...Rc1
- 2.Bxb5#
- 1...Rc3
- 2.Bxb5#
- 1...Rc4
- 2.Bxb5#
- 2.Qxc4#
- 1...Rd5
- 2.Qxe8#
- 1...Bd7
- 2.Se7#
- 2.Qa8#
- 1...Sc1
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Bf7!
- 1...Rxe5
- 1.Rh7?
- 1...Rxe5
- 2.Sgxe5#
- 1...Bxg6
- 2.Qa8#
- 1...Rc2
- 2.Bxb5#
- 1...Rc1
- 2.Bxb5#
- 1...Rc3
- 2.Bxb5#
- 1...Rc4
- 2.Bxb5#
- 2.Qxc4#
- 1...Rd5
- 2.Qxe8#
- 1...Bd7
- 2.Se7#
- 2.Qa8#
- 1...Sc1
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Bf7!
- 1...Rxe5
- 1.Qxa2?
- threat
- 2.Sb4#
- 1...Rxe5
- 2.Sgxe5#
- 1...Rc4
- 2.Qxc4#
- 1...Rc2
- 2.Bxb5#
- 1...Rc1
- 2.Bxb5#
- 2.Rxc1#
- 2.Qg2#
- 1...Rc3
- 2.Bxb5#
- 2.Qg2#
- 1...Rd5!
- threat
- 1.Qc4?
- threat
- 2.Bxb5#
- 1...Sc3
- 2.Sb4#
- 1...Rxc4!
- threat
- 1.a7?
- threat
- 2.a8Q#
- 2.a8B#
- 1...Rxe5
- 2.a8Q#
- 2.a8B#
- 1...Bxg6
- 2.Qa8#
- 2.a8Q#
- 2.a8B#
- 1...Bf7
- 2.Qa8#
- 2.a8Q#
- 2.a8B#
- 1...Rc2
- 2.a8Q#
- 2.a8B#
- 1...Rc1
- 2.a8Q#
- 2.a8B#
- 1...Rc3
- 2.a8Q#
- 2.a8B#
- 1...Rc4
- 2.a8Q#
- 2.a8B#
- 1...Rd5
- 2.a8Q#
- 2.a8B#
- 1...Bd7
- 2.Qa8#
- 2.a8Q#
- 2.a8B#
- 1...Sc1
- 2.a8Q#
- 2.a8B#
- 1...Sc3
- 2.a8Q#
- 2.a8B#
- 1...Sb4
- 2.a8Q#
- 2.a8B#
- 1...Kb7!
- threat
- 1.Sgf4?
- Keys
- 1.Bd1!
- 1...Rxe5
- 2.Sgxe5#
- 1...Bxg6
- 2.Qa8#
- 1...Sxd6
- 2.Rxb6#
- 1...Sxc7
- 2.Rxc7#
- 1...Bf7
- 2.Qa8#
- 1...Rc1
- 2.Bf3#
- 1...Rc2
- 2.Bf3#
- 1...Rc3
- 2.Bf3#
- 1...Rc4
- 2.Qxc4#
- 1...Rd5
- 2.Qxe8#
- 1...Bd7
- 2.Qa8#
- 1...Sc1
- 2.Sb4#
- 1...Sac3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Sa3
- 2.Rxb6#
- 1...Sbc3
- 2.Rxb6#
- 1...Sd4
- 2.Rxb6#
- 1...Sa7
- 2.Rxb6#
- 1...Rxe5
- 1.Bd1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD,P_PINR(B)::B(D),XS(b)
- R(c);N_GUARD::B(D),XS(b)
- R(c);SBLOCK::QAB(L),XB(g)
- R(c);XP(F)::S(I),XR(c)
- B(g);OGATE,XS(I)::QAB(L)
- B(g);OGATE::QAB(L)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Tries
- Try
- S(I);
- Threat
- QAB(L),XB(g)
- Vars
- B(g);OGATE::QAB(L)
- Refutation
- P(d);XS(I)
- Try
- S(I);
- Vars
- B(g);OGATE::QAB(L)
- R(c);N_GUARD,P_PINR(B)::B(D),XS(b)
- R(c);N_GUARD::B(D),XS(b)
- R(c);SBLOCK::QAB(L),XB(g)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- R(c);XP(F)
- Try
- R(B);
- Vars
- R(c);XP(F)::S(I),XR(c)
- B(g);OGATE,XS(I)::QAB(L)
- B(g);OGATE::QAB(L)
- R(c);N_GUARD::B(D),XS(b)
- R(c);SBLOCK::QAB(L),XB(g)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- R(c);CHECK
- Try
- R(B);
- Vars
- R(c);XP(F)::S(I),XR(c)
- B(g);OGATE,XS(I)::QAB(L)
- B(g);OGATE::QAB(L)
- R(c);N_GUARD::B(D),XS(b)
- R(c);SBLOCK::QAB(L),XB(g)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- R(c);CHECK
- Try
- R(B);XS(b)
- Threat
- DUALS(2)
- Vars
- R(c);OGATEB,P_SPINR(c),XR(B)::QAR2(L)
- Refutation
- R(c);CHECK
- Try
- R(K);
- Vars
- R(c);XP(F)::S(I),XR(c)
- B(g);OGATE,XS(I)::QAB(L)
- R(c);N_GUARD::B(D),XS(b)
- R(c);N_GUARD,P_PINR(B)::B(D),XS(b)
- R(c);SBLOCK::QAB(L),XB(g)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- B(g);
- Try
- R(K);
- Vars
- R(c);XP(F)::S(I),XR(c)
- B(g);OGATE,XS(I)::QAB(L)
- R(c);N_GUARD::B(D),XS(b)
- R(c);N_GUARD,P_PINR(B)::B(D),XS(b)
- R(c);SBLOCK::QAB(L),XB(g)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- B(g);
- Try
- Q(L);XS(a)
- Threat
- S(C)
- Vars
- R(c);XP(F)::S(I),XR(c)
- R(c);OGATEB::QAR2(L),XR(c)
- R(c);N_GUARD::B(D),XS(b)
- Refutation
- R(c);
- Try
- Q(L);P_PINR(c)
- Threat
- B(D),XS(b)
- Vars
- S(a);N_GUARD::S(C)
- Refutation
- R(c);N_SPINR(c),XQ(L)
- Try
- P(G);
- Threat
- P=Q
- Vars
- R(c);XP(F)::P=Q
- R(c);::P=Q
- R(c);P_PINR(B)::P=Q
- S(a);::P=Q
- Refutation
- K(f);N_SPINS(b),S_FLIGHT
- Try
- Actual
- B(D);N_PINS(b)
- Vars
- R(c);XP(F)::S(I),XR(c)
- B(g);OGATE,XS(I)::QAB(L)
- S(b);OGATE,XP(H)::R1(B),XP(e)
- S(b);OGATE,XB(J)::R1(K),XS(b)
- B(g);OGATE::QAB(L)
- R(c);N_GUARD,P_PINR(B)::B(D)
- R(c);N_GUARD::B(D)
- R(c);OGATEB::QAR2(L),XR(c)
- R(c);SBLOCK::QAB(L),XB(g)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(b);OGATE::R1(B),XP(e)
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).