MESON Chess Problem Database
Problem Display
PID: 110631 (8/2pn4/N1kN4/P2R4/1p1b4/3R3K/1r4B1/n7 w - - 0 1)
Williams, Philip Hamilton
5th Prize, Morning Post, 1918
#2
7 + 7
| 5454 | Near Snap | 2009 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.R5xd4#
- 1...Ra2
- 2.Sxb4#
- 1...Rc2
- 2.Sxb4#
- 1...Rd2
- 2.Sxb4#
- 1...Re2
- 2.Sxb4#
- 1...Rf2
- 2.Sxb4#
- 1...Rxg2
- 2.Sxb4#
- 1...Rb3
- 2.Rxd4#
- 1...Bg1
- 2.Rc5#
- 1...Bf2
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bc3
- 2.Rc5#
- 1...Be3
- 2.Rc5#
- 1...Bc5
- 2.Rxc5#
- 1...Be5
- 2.Rc5#
- 1...Bb6
- 2.Rc5#
- 1...Bf6
- 2.Rc5#
- 1...Ba7
- 2.Rc5#
- 1...Bg7
- 2.Rc5#
- 1...Bh8
- 2.Rc5#
- 1...Sc2
- 2.R5xd4#
- 1...Sb3
- 2.Sxb4#
- 1...Sc5
- 2.Sb8#
- 1...Se5
- 2.Sb8#
- 1...Sb6
- 2.Sb8#
- 1...Sf6
- 2.Sb8#
- 1...Sb8
- 2.Sxb8#
- 1...Sf8
- 2.Sb8#
- 1...b3
- 2.Sb4#
- 1...cxd6
- 2.Rc5#
- 1...Rb1
- Tries
- 1.Bf3?
- threat
- 2.R5xd4#
- 1...cxd6
- 2.Rc5#
- 1...Sc5
- 2.Sb8#
- 1...Se5
- 2.Sb8#
- 1...Sb6
- 2.Sb8#
- 1...Sf6
- 2.Sb8#
- 1...Sb8
- 2.Sxb8#
- 1...Sf8
- 2.Sb8#
- 1...Re2
- 2.Sxb4#
- 1...Rf2
- 2.Sxb4#
- 1...Bg1
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bf2
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bc3
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Be3
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bc5
- 2.R5d4#
- 2.Rxc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Be5
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Rxe5#
- 1...Bb6
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bf6
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Ba7
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bg7
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bh8
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Rh2+!
- threat
- 1.Be4?
- threat
- 2.R5xd4#
- 1...cxd6
- 2.Rc5#
- 1...Sc5
- 2.Sb8#
- 1...Se5
- 2.Sb8#
- 1...Sb6
- 2.Sb8#
- 1...Sf6
- 2.Sb8#
- 1...Sb8
- 2.Sxb8#
- 1...Sf8
- 2.Sb8#
- 1...Re2
- 2.Sxb4#
- 1...Bg1
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bf2
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bc3
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Be3
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bc5
- 2.R5d4#
- 2.Rxc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Be5
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Rxe5#
- 1...Bb6
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bf6
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Ba7
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bg7
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bh8
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Rh2+!
- threat
- 1.Rd1?
- 1...Rxg2
- 2.Sxb4#
- 1...cxd6
- 2.Rc5#
- 1...Sc5
- 2.Sb8#
- 1...Se5
- 2.Sb8#
- 1...Sb6
- 2.Sb8#
- 1...Sf6
- 2.Sb8#
- 1...Sb8
- 2.Sxb8#
- 1...Sf8
- 2.Sb8#
- 1...Rb1
- 2.R5xd4#
- 1...Ra2
- 2.Sxb4#
- 1...Rc2
- 2.Sxb4#
- 1...Rd2
- 2.Sxb4#
- 1...Re2
- 2.Sxb4#
- 1...Rf2
- 2.Sxb4#
- 1...Bg1
- 2.R5d2#
- 2.Rc5#
- 1...Bf2
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bc3
- 2.R5d2#
- 2.Rc5#
- 1...Be3
- 2.R5d2#
- 2.Rc5#
- 1...Bc5
- 2.R5d2#
- 2.Rxc5#
- 1...Be5
- 2.R5d2#
- 2.Rc5#
- 1...Bb6
- 2.R5d2#
- 2.Rc5#
- 1...Bf6
- 2.R5d2#
- 2.Rc5#
- 1...Ba7
- 2.R5d2#
- 2.Rc5#
- 1...Bg7
- 2.R5d2#
- 2.Rc5#
- 1...Bh8
- 2.R5d2#
- 2.Rc5#
- 1...Sc2
- 2.R5xd4#
- 1...Sb3
- 2.Sxb4#
- 1...b3
- 2.Sb4#
- 1...Rb3+!
- 1...Rxg2
- 1.Rd2?
- threat
- 2.R5xd4#
- 1...Rxd2
- 2.Sxb4#
- 1...cxd6
- 2.Rc5#
- 1...Sc5
- 2.Sb8#
- 1...Se5
- 2.Sb8#
- 1...Sb6
- 2.Sb8#
- 1...Sf6
- 2.Sb8#
- 1...Sb8
- 2.Sxb8#
- 1...Sf8
- 2.Sb8#
- 1...Bg1
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bf2
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bc3
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Be3
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bc5
- 2.R5d3#
- 2.R5d4#
- 2.Rxc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Be5
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Rxe5#
- 1...Bb6
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bf6
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Ba7
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bg7
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Bh8
- 2.R5d3#
- 2.R5d4#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 1...Rb3+!
- threat
- 1.Rb3?
- threat
- 2.Sxb4#
- 1...cxd6
- 2.Rc5#
- 1...Sc5
- 2.Sb8#
- 1...Se5
- 2.Sb8#
- 1...Sb6
- 2.Sb8#
- 1...Sf6
- 2.Sb8#
- 1...Sb8
- 2.Sxb8#
- 1...Sf8
- 2.Sb8#
- 1...Bc3
- 2.Rd2#
- 1...Bc5
- 2.Rd2#
- 1...Sc2
- 2.Rxd4#
- 1...Rxb3+!
- threat
- 1.Rc3+?
- 1...Bxc3
- 2.Rd2#
- 1...Bc5
- 2.Rd2#
- 1...Sc5
- 2.Sb8#
- 1...bxc3!
- 1...Bxc3
- 1.Rg3?
- 1...Rxg2
- 2.Sxb4#
- 1...cxd6
- 2.Rc5#
- 1...Sc5
- 2.Sb8#
- 1...Se5
- 2.Sb8#
- 1...Sb6
- 2.Sb8#
- 1...Sf6
- 2.Sb8#
- 1...Sb8
- 2.Sxb8#
- 1...Sf8
- 2.Sb8#
- 1...Rb1
- 2.Rxd4#
- 1...Ra2
- 2.Sxb4#
- 1...Rc2
- 2.Sxb4#
- 1...Rd2
- 2.Sxb4#
- 1...Re2
- 2.Sxb4#
- 1...Rf2
- 2.Sxb4#
- 1...Bg1
- 2.Rd2#
- 1...Bf2
- 2.Rd1#
- 2.Rd2#
- 2.Rdd3#
- 2.Rd4#
- 1...Bc3
- 2.Rd2#
- 1...Be3
- 2.Rd2#
- 1...Bc5
- 2.Rd2#
- 1...Be5
- 2.Rd2#
- 1...Bb6
- 2.Rd2#
- 1...Bf6
- 2.Rd2#
- 1...Ba7
- 2.Rd2#
- 1...Bg7
- 2.Rd2#
- 1...Bh8
- 2.Rd2#
- 1...Sc2
- 2.Rxd4#
- 1...Sb3
- 2.Sxb4#
- 1...b3
- 2.Sb4#
- 1...Rb3!
- 1...Rxg2
- 1.R3xd4?
- threat
- 2.Rc5#
- 1...Rxg2
- 2.Sxb4#
- 1...Sc5
- 2.Sb8#
- 1...Se5
- 2.Sb8#
- 1...Sb6
- 2.Sb8#
- 1...Sf6
- 2.Sb8#
- 1...Sb8
- 2.Sxb8#
- 1...Sf8
- 2.Sb8#
- 1...Rb3+!
- threat
- 1.Bf3?
- Keys
- 1.Re3!
- 1...Rxg2
- 2.Sxb4#
- 1...Bxe3
- 2.Rd2#
- 1...cxd6
- 2.Rc5#
- 1...Sc5
- 2.Sb8#
- 1...Se5
- 2.Sb8#
- 1...Sb6
- 2.Sb8#
- 1...Sf6
- 2.Sb8#
- 1...Sb8
- 2.Sxb8#
- 1...Sf8
- 2.Sb8#
- 1...Rb1
- 2.Rxd4#
- 1...Ra2
- 2.Sxb4#
- 1...Rc2
- 2.Sxb4#
- 1...Rd2
- 2.Sxb4#
- 1...Re2
- 2.Sxb4#
- 1...Rf2
- 2.Sxb4#
- 1...Rb3
- 2.Rxd4#
- 1...Bc3
- 2.Rd2#
- 1...Bc5
- 2.Rd2#
- 1...Be5
- 2.Rd2#
- 1...Bb6
- 2.Rd2#
- 1...Bf6
- 2.Rd2#
- 1...Ba7
- 2.Rd2#
- 1...Bg7
- 2.Rd2#
- 1...Bh8
- 2.Rd2#
- 1...Sc2
- 2.Rxd4#
- 1...Sb3
- 2.Sxb4#
- 1...b3
- 2.Sb4#
- 1...Rxg2
- 1.Re3!
This anticipates 96874(1945)
This is a version of 21390
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(b);N_GUARD::B(A)+R(E),XB(d)
- R(b);N_GUARD::S(F),XP(c)
- R(b);N_GUARD,XB(A)::S(F),XP(c)
- R(b);N_GUARD,P_PINR(B)::B(A)+R(E),XB(d)
- B(d);::B(A)+R(E),DCHECK
- B(d);::B(A)+R(E),DCHECK,XB(d)
- S(a);S_CUTR(b)::B(A)+R(E),XB(d)
- S(a);S_CUTR(b)::S(F),XP(c)
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- P(c);S_CUTR(b)::S(F)
- P(f);SBLOCK,XS(G)::B(A)+R(E),DCHECK
- Tries
- Try
- B(A);
- Threat
- B(A)+R(E),XB(d)
- Vars
- P(f);SBLOCK,XS(G)::B(A)+R(E),DCHECK
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- R(b);N_GUARD::S(F),XP(c)
- Refutation
- R(b);CHECK
- Try
- B(A);
- Threat
- B(A)+R(E),XB(d)
- Vars
- P(f);SBLOCK,XS(G)::B(A)+R(E),DCHECK
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- R(b);N_GUARD::S(F),XP(c)
- Refutation
- R(b);CHECK
- Try
- R(B);
- Vars
- R(b);N_GUARD,XB(A)::S(F),XP(c)
- P(f);SBLOCK,XS(G)::B(A)+R(E),DCHECK
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- R(b);N_GUARD::B(A)+R(E),XB(d)
- R(b);N_GUARD::S(F),XP(c)
- S(a);S_CUTR(b)::B(A)+R(E),XB(d)
- S(a);S_CUTR(b)::S(F),XP(c)
- P(c);S_CUTR(b)::S(F)
- Refutation
- R(b);CHECK
- Try
- R(B);
- Threat
- B(A)+R(E),XB(d)
- Vars
- R(b);N_GUARD,XR(B)::S(F),XP(c)
- P(f);SBLOCK,XS(G)::B(A)+R(E),DCHECK
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- Refutation
- R(b);CHECK
- Try
- R(B);
- Threat
- S(F),XP(c)
- Vars
- P(f);SBLOCK,XS(G)::B(A)+R(E),DCHECK
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- B(d);OGATE::B(A)+R(E)
- S(a);S_CUTR(b)::B(A)+R(E),XB(d)
- Refutation
- R(b);CHECK,XR(B)
- Try
- R(B);CHECK
- Vars
- B(d);OGATE,XR(B)::B(A)+R(E)
- B(d);OGATE,P_SPINB(d)::B(A)+R(E)
- S(g);P_SPINS(g)::S(F)
- Refutation
- P(c);XR(B)
- Try
- R(B);
- Vars
- R(b);N_GUARD,XB(A)::S(F),XP(c)
- P(f);SBLOCK,XS(G)::B(A)+R(E),DCHECK
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- R(b);N_GUARD::B(A)+R(E),XB(d)
- R(b);N_GUARD::S(F),XP(c)
- B(d);OGATE::B(A)+R(E)
- S(a);S_CUTR(b)::B(A)+R(E),XB(d)
- S(a);S_CUTR(b)::S(F),XP(c)
- P(c);S_CUTR(b)::S(F)
- Refutation
- R(b);P_PINR(B)
- Try
- R(B);XB(d)
- Threat
- B(A)+R(E),DCHECK
- Vars
- R(b);N_GUARD,XB(A)::S(F),XP(c)
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- Refutation
- R(b);CHECK
- Try
- Actual
- R(B);
- Vars
- R(b);N_GUARD,XB(A)::S(F),XP(c)
- B(d);OGATE,XR(B)::B(A)+R(E)
- P(f);SBLOCK,XS(G)::B(A)+R(E),DCHECK
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- R(b);N_GUARD::B(A)+R(E),XB(d)
- R(b);N_GUARD::S(F),XP(c)
- R(b);N_GUARD,P_PINR(B)::B(A)+R(E),XB(d)
- B(d);OGATE::B(A)+R(E)
- S(a);S_CUTR(b)::B(A)+R(E),XB(d)
- S(a);S_CUTR(b)::S(F),XP(c)
- P(c);S_CUTR(b)::S(F)
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).