MESON Chess Problem Database
Problem Display
PID: 207924 (3R4/4ppK1/n3k3/6R1/2nP1B2/1Nb5/1pr5/1B6 w - - 0 1)
Williams, Philip Hamilton
The Observer, 1919
(First published on Sun Dec 14 1919)
#2
7 + 8
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Bf5#
- 1...Rd2
- 2.Bf5#
- 1...Re2
- 2.Bf5#
- 1...Rf2
- 2.Bf5#
- 1...Rg2
- 2.Bf5#
- 1...Rh2
- 2.Bf5#
- 1...Be1
- 2.d5#
- 1...Bd2
- 2.d5#
- 1...Bb4
- 2.d5#
- 1...Bxd4+
- 2.Sxd4#
- 1...Ba5
- 2.d5#
- 1...Sd2
- 2.Re5#
- 1...Sa3
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 2.d5#
- 1...Sb6
- 2.Re5#
- 1...Sd6
- 2.Re5#
- 1...Sb4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...f5
- 2.Rg6#
- 1...f6
- 2.d5#
- 1...Rc1
- Tries
- 1.Bh2?
- 1...Bxd4+
- 2.Sxd4#
- 1...Rxh2
- 2.Bf5#
- 1...Sb4
- 2.Sc5#
- 1...Rc1
- 2.Bf5#
- 1...Rd2
- 2.Bf5#
- 1...Re2
- 2.Bf5#
- 1...Rg2
- 2.Bf5#
- 1...Be1
- 2.d5#
- 1...Bd2
- 2.d5#
- 1...Bb4
- 2.d5#
- 1...Ba5
- 2.d5#
- 1...Sd2
- 2.Re5#
- 1...Sa3
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 2.d5#
- 1...Sb6
- 2.Re5#
- 1...Sd6
- 2.Re5#
- 1...Sc5
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...f5
- 2.Rg6#
- 1...f6
- 2.d5#
- 1...Rf2!
- 1...Bxd4+
- 1.Be3?
- 1...Bxd4+
- 2.Sxd4#
- 1...Sxe3
- 2.Re5#
- 1...Sb4
- 2.Sc5#
- 1...Rc1
- 2.Bf5#
- 1...Rd2
- 2.Bf5#
- 1...Re2
- 2.Bf5#
- 1...Rg2
- 2.Bf5#
- 1...Rh2
- 2.Bf5#
- 1...Be1
- 2.d5#
- 1...Bd2
- 2.d5#
- 1...Bb4
- 2.d5#
- 1...Ba5
- 2.d5#
- 1...Sd2
- 2.Re5#
- 1...Sa3
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 2.d5#
- 1...Sb6
- 2.Re5#
- 1...Sd6
- 2.Re5#
- 1...Sc5
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...f5
- 2.Rg6#
- 1...f6
- 2.d5#
- 1...Rf2!
- 1...Bxd4+
- 1.Bg3?
- 1...Bxd4+
- 2.Sxd4#
- 1...Sb4
- 2.Sc5#
- 1...Rc1
- 2.Bf5#
- 1...Rd2
- 2.Bf5#
- 1...Re2
- 2.Bf5#
- 1...Rg2
- 2.Bf5#
- 1...Rh2
- 2.Bf5#
- 1...Be1
- 2.d5#
- 1...Bd2
- 2.d5#
- 1...Bb4
- 2.d5#
- 1...Ba5
- 2.d5#
- 1...Sd2
- 2.Re5#
- 1...Sa3
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 2.d5#
- 1...Sb6
- 2.Re5#
- 1...Sd6
- 2.Re5#
- 1...Sc5
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...f5
- 2.Rg6#
- 1...f6
- 2.d5#
- 1...Rf2!
- 1...Bxd4+
- 1.Bc7?
- 1...Bxd4+
- 2.Sxd4#
- 1...Sxc7
- 2.Sc5#
- 1...Rc1
- 2.Bf5#
- 1...Rd2
- 2.Bf5#
- 1...Re2
- 2.Bf5#
- 1...Rg2
- 2.Bf5#
- 1...Rh2
- 2.Bf5#
- 1...Be1
- 2.d5#
- 1...Bd2
- 2.d5#
- 1...Bb4
- 2.d5#
- 1...Ba5
- 2.d5#
- 1...Sd2
- 2.Re5#
- 1...Sa3
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 2.d5#
- 1...Sb6
- 2.Re5#
- 1...Sd6
- 2.Re5#
- 1...Sb4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...Sb8
- 2.Sc5#
- 1...f5
- 2.Rg6#
- 1...f6
- 2.d5#
- 1...Rf2!
- 1...Bxd4+
- 1.Bb8?
- 1...Bxd4+
- 2.Sxd4#
- 1...Sxb8
- 2.Sc5#
- 1...Rc1
- 2.Bf5#
- 1...Rd2
- 2.Bf5#
- 1...Re2
- 2.Bf5#
- 1...Rg2
- 2.Bf5#
- 1...Rh2
- 2.Bf5#
- 1...Be1
- 2.d5#
- 1...Bd2
- 2.d5#
- 1...Bb4
- 2.d5#
- 1...Ba5
- 2.d5#
- 1...Sd2
- 2.Re5#
- 1...Sa3
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 2.d5#
- 1...Sb6
- 2.Re5#
- 1...Sd6
- 2.Re5#
- 1...Sb4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...f5
- 2.Rg6#
- 1...f6
- 2.d5#
- 1...Rf2!
- 1...Bxd4+
- 1.Rh5?
- 1...Bxd4+
- 2.Sxd4#
- 1...Rf2
- 2.Bf5#
- 1...Rc1
- 2.Bf5#
- 1...Rd2
- 2.Bf5#
- 1...Re2
- 2.Bf5#
- 1...Rh2
- 2.Bf5#
- 1...Be1
- 2.d5#
- 1...Bd2
- 2.d5#
- 1...Bb4
- 2.d5#
- 1...Ba5
- 2.d5#
- 1...Sd2
- 2.Re5#
- 1...Sa3
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 2.d5#
- 1...Sb6
- 2.Re5#
- 1...Sd6
- 2.Re5#
- 1...Sb4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...f5
- 2.Rh6#
- 1...f6
- 2.d5#
- 1...Rg2+!
- 1...Bxd4+
- 1.Bh2?
- Keys
- 1.Bd2!
- 1...Bxd4+
- 2.Sxd4#
- 1...Rxd2
- 2.Bf5#
- 1...Bxd2
- 2.d5#
- 1...Sxd2
- 2.Re5#
- 1...Sb4
- 2.Sc5#
- 1...Rc1
- 2.Bf5#
- 1...Bb4
- 2.d5#
- 1...Ba5
- 2.d5#
- 1...Sa3
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 2.d5#
- 1...Sb6
- 2.Re5#
- 1...Sd6
- 2.Re5#
- 1...Sc5
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...f5
- 2.Rg6#
- 1...f6
- 2.d5#
- 1...Bxd4+
- 1.Bd2!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 5
- Sets
- R(b);OGATE::B(A)
- R(b);OGATE,P_PINR(E)::B(A)
- B(c);N_PINP(C)::P(C)
- B(c);CHECK,XP(C)::S(B),XB(c)
- S(d);N_GUARD::R1(E)
- S(e);N_GUARD::S(B)
- S(e);N_GUARD::S(B),XS(e)
- P(h);N_GUARD,SBLOCK::R(E)
- P(h);N_PINP(C)::P(C)
- Tries
- Try
- B(D);
- Vars
- B(c);CHECK,XP(C)::S(B),XB(c)
- R(b);OGATE,XB(D)::B(A)
- S(e);N_GUARD::S(B)
- R(b);OGATE::B(A)
- R(b);OGATE,P_PINR(E)::B(A)
- B(c);N_PINP(C)::P(C)
- S(d);N_GUARD::R1(E)
- S(e);N_GUARD::S(B),XS(e)
- P(h);N_GUARD,SBLOCK::R(E)
- P(h);N_PINP(C)::P(C)
- Refutation
- R(b);
- Try
- B(D);
- Vars
- B(c);CHECK,XP(C)::S(B),XB(c)
- S(d);N_GUARD,XB(D)::R1(E)
- S(e);N_GUARD::S(B)
- R(b);OGATE::B(A)
- R(b);OGATE,P_PINR(E)::B(A)
- B(c);N_PINP(C)::P(C)
- S(d);N_GUARD::R1(E)
- S(e);N_GUARD::S(B),XS(e)
- P(h);N_GUARD,SBLOCK::R(E)
- P(h);N_PINP(C)::P(C)
- Refutation
- R(b);
- Try
- B(D);
- Vars
- B(c);CHECK,XP(C)::S(B),XB(c)
- S(e);N_GUARD::S(B)
- R(b);OGATE::B(A)
- B(c);N_PINP(C)::P(C)
- S(d);N_GUARD::R1(E)
- S(e);N_GUARD::S(B),XS(e)
- P(h);N_GUARD,SBLOCK::R(E)
- P(h);N_PINP(C)::P(C)
- Refutation
- R(b);
- Try
- B(D);
- Vars
- B(c);CHECK,XP(C)::S(B),XB(c)
- S(e);N_GUARD,XB(D)::S(B)
- R(b);OGATE::B(A)
- R(b);OGATE,P_PINR(E)::B(A)
- B(c);N_PINP(C)::P(C)
- S(d);N_GUARD::R1(E)
- S(e);N_GUARD::S(B)
- S(e);N_GUARD::S(B),XS(e)
- P(h);N_GUARD,SBLOCK::R(E)
- P(h);N_PINP(C)::P(C)
- Refutation
- R(b);
- Try
- B(D);
- Vars
- B(c);CHECK,XP(C)::S(B),XB(c)
- S(e);N_GUARD,XB(D)::S(B)
- R(b);OGATE::B(A)
- R(b);OGATE,P_PINR(E)::B(A)
- B(c);N_PINP(C)::P(C)
- S(d);N_GUARD::R1(E)
- S(e);N_GUARD::S(B)
- S(e);N_GUARD::S(B),XS(e)
- P(h);N_GUARD,SBLOCK::R(E)
- P(h);N_PINP(C)::P(C)
- Refutation
- R(b);
- Try
- R(E);
- Vars
- B(c);CHECK,XP(C)::S(B),XB(c)
- R(b);OGATE::B(A)
- B(c);N_PINP(C)::P(C)
- S(d);N_GUARD::R1(E)
- S(e);N_GUARD::S(B)
- S(e);N_GUARD::S(B),XS(e)
- P(h);N_GUARD,SBLOCK::R(E)
- P(h);N_PINP(C)::P(C)
- Refutation
- R(b);CHECK
- Try
- Actual
- B(D);
- Vars
- B(c);CHECK,XP(C)::S(B),XB(c)
- R(b);OGATE,XB(D)::B(A)
- B(c);N_PINP(C),XB(D)::P(C)
- S(d);N_GUARD,XB(D)::R1(E)
- S(e);N_GUARD::S(B)
- R(b);OGATE::B(A)
- B(c);N_PINP(C)::P(C)
- S(d);N_GUARD::R1(E)
- S(e);N_GUARD::S(B),XS(e)
- P(h);N_GUARD,SBLOCK::R(E)
- P(h);N_PINP(C)::P(C)
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).