MESON Chess Problem Database
Problem Display
PID: 411 (8/7p/3n3B/3R3K/Q1p1N2P/1rPP1kpB/1P1R3n/7b w - - 0 1)
Warton, Joseph John
Warton, Thomas Joseph
The Observer, 1943
(First published on Sun Jan 17 1943)
#2
11 + 8
| 5606 | The Wangling Wizards | 2005 |
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rxb2
- 2.Qd1#
- 1...Ra3
- 2.Qd1#
- 1...Rxc3
- 2.Qd1#
- 1...Rb4
- 2.Qd1#
- 1...Rb5
- 2.Qd1#
- 1...Rb6
- 2.Qd1#
- 1...Rb7
- 2.Qd1#
- 1...Rb8
- 2.Qd1#
- 1...Bg2
- 2.Bxg2#
- 1...Sf1
- 2.Bg4#
- 1...Sg4
- 2.Bxg4#
- 1...Sxe4
- 2.Rf5#
- 1...Sb5
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sb7
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Se8
- 2.Rf5#
- 1...g2
- 2.Rf2#
- 1...cxd3
- 2.R5xd3#
- 1...Rxb2
- Tries
- 1.Sc5?
- 1...Rxb2
- 2.Qd1#
- 1...Rxc3
- 2.Qd1#
- 1...cxd3
- 2.R5xd3#
- 2.Qf4#
- 1...Ra3
- 2.Qd1#
- 1...Rb4
- 2.Qd1#
- 1...Rb5
- 2.Qd1#
- 1...Rb6
- 2.Qd1#
- 1...Rb7
- 2.Qd1#
- 1...Rb8
- 2.Qd1#
- 1...Bg2
- 2.Bxg2#
- 1...Sf1
- 2.Bg4#
- 1...Sg4
- 2.Bxg4#
- 1...Se4
- 2.Rf5#
- 1...Sb5
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sb7
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Se8
- 2.Rf5#
- 1...g2!
- 1...Rxb2
- 1.Sxd6?
- threat
- 2.Rf5#
- 1...Rb5
- 2.Qd1#
- 1...g2!
- threat
- 1.Sf6?
- 1...Rxb2
- 2.Qd1#
- 1...Rxc3
- 2.Qd1#
- 1...cxd3
- 2.R5xd3#
- 2.Qf4#
- 1...Ra3
- 2.Qd1#
- 1...Rb4
- 2.Qd1#
- 1...Rb5
- 2.Qd1#
- 1...Rb6
- 2.Qd1#
- 1...Rb7
- 2.Qd1#
- 1...Rb8
- 2.Qd1#
- 1...Bg2
- 2.Bxg2#
- 1...Sf1
- 2.Bg4#
- 1...Sg4
- 2.Bxg4#
- 1...Se4
- 2.Rf5#
- 1...Sb5
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sb7
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Se8
- 2.Rf5#
- 1...g2!
- 1...Rxb2
- 1.Be6?
- 1...Rxb2
- 2.Qd1#
- 1...Rxc3
- 2.Qd1#
- 1...Sxe4
- 2.Rf5#
- 1...cxd3
- 2.R5xd3#
- 1...Ra3
- 2.Qd1#
- 1...Rb4
- 2.Qd1#
- 1...Rb5
- 2.Qd1#
- 1...Rb6
- 2.Qd1#
- 1...Rb7
- 2.Qd1#
- 1...Rb8
- 2.Qd1#
- 1...Sf1
- 2.Bg4#
- 1...Sg4
- 2.Bxg4#
- 1...Sb5
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sb7
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Se8
- 2.Rf5#
- 1...g2
- 2.Rf2#
- 1...Bg2!
- 1...Rxb2
- 1.Bd7?
- 1...Rxb2
- 2.Qd1#
- 1...Rxc3
- 2.Qd1#
- 1...Sxe4
- 2.Rf5#
- 1...cxd3
- 2.R5xd3#
- 1...Ra3
- 2.Qd1#
- 1...Rb4
- 2.Qd1#
- 1...Rb5
- 2.Qd1#
- 1...Rb6
- 2.Qd1#
- 1...Rb7
- 2.Qd1#
- 1...Rb8
- 2.Qd1#
- 1...Sf1
- 2.Bg4#
- 1...Sg4
- 2.Bxg4#
- 1...Sb5
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sb7
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Se8
- 2.Rf5#
- 1...g2
- 2.Rf2#
- 1...Bg2!
- 1...Rxb2
- 1.Bc8?
- 1...Rxb2
- 2.Qd1#
- 1...Rxc3
- 2.Qd1#
- 1...Sxe4
- 2.Rf5#
- 1...Sxc8
- 2.Rf5#
- 1...cxd3
- 2.R5xd3#
- 1...Ra3
- 2.Qd1#
- 1...Rb4
- 2.Qd1#
- 1...Rb5
- 2.Qd1#
- 1...Rb6
- 2.Qd1#
- 1...Rb7
- 2.Qd1#
- 1...Rb8
- 2.Qd1#
- 1...Sf1
- 2.Bg4#
- 1...Sg4
- 2.Bxg4#
- 1...Sb5
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sb7
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Se8
- 2.Rf5#
- 1...g2
- 2.Rf2#
- 1...Bg2!
- 1...Rxb2
- 1.Bg5?
- 1...Rxb2
- 2.Qd1#
- 1...Rxc3
- 2.Qd1#
- 1...Sxe4
- 2.Rf5#
- 1...cxd3
- 2.R5xd3#
- 1...Bg2
- 2.Bxg2#
- 1...Ra3
- 2.Qd1#
- 1...Rb4
- 2.Qd1#
- 1...Rb5
- 2.Qd1#
- 1...Rb6
- 2.Qd1#
- 1...Rb7
- 2.Qd1#
- 1...Rb8
- 2.Qd1#
- 1...Sf1
- 2.Bg4#
- 1...Sg4
- 2.Bxg4#
- 1...Sb5
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sb7
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Se8
- 2.Rf5#
- 1...g2
- 2.Rf2#
- 1...h6!
- 1...Rxb2
- 1.Rxh2?
- threat
- 2.Sd2#
- 2.Bg4#
- 1...Rxb2
- 2.Bg4#
- 1...Sxe4
- 2.Bg4#
- 2.Rf5#
- 1...Bg2
- 2.Bg4#
- 1...g2
- 2.Bg4#
- 1...gxh2!
- threat
- 1.Rc5?
- 1...Rxb2
- 2.Qd1#
- 1...Rxc3
- 2.Qd1#
- 1...Sxe4
- 2.Rf5#
- 1...Bg2
- 2.Bxg2#
- 1...Ra3
- 2.Qd1#
- 1...Rb4
- 2.Qd1#
- 1...Rb5
- 2.Qd1#
- 1...Rb6
- 2.Qd1#
- 1...Rb7
- 2.Qd1#
- 1...Rb8
- 2.Qd1#
- 1...Sf1
- 2.Bg4#
- 1...Sg4
- 2.Bxg4#
- 1...Sb5
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sb7
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Se8
- 2.Rf5#
- 1...g2
- 2.Rf2#
- 1...cxd3!
- 1...Rxb2
- 1.Rxd6?
- threat
- 2.Rf6#
- 1...Rb6
- 2.Qd1#
- 1...Sg4
- 2.Bxg4#
- 1...Rb5+!
- threat
- 1.Qa7?
- threat
- 2.Qe3#
- 1...Sf1
- 2.Bg4#
- 1...Sg4
- 2.Bxg4#
- 1...Sf5
- 2.Rxf5#
- 1...Rb6!
- threat
- 1.Sc5?
- Keys
- 1.Re5!
- 1...Rxb2
- 2.Qd1#
- 1...Rxc3
- 2.Qd1#
- 1...Sxe4
- 2.Rf5#
- 1...cxd3
- 2.Sg5#
- 1...Bg2
- 2.Bxg2#
- 1...Ra3
- 2.Qd1#
- 1...Rb4
- 2.Qd1#
- 1...Rb5
- 2.Qd1#
- 1...Rb6
- 2.Qd1#
- 1...Rb7
- 2.Qd1#
- 1...Rb8
- 2.Qd1#
- 1...Sf1
- 2.Bg4#
- 1...Sg4
- 2.Bxg4#
- 1...Sb5
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sb7
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Se8
- 2.Rf5#
- 1...g2
- 2.Rf2#
- 1...Rxb2
- 1.Re5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(c);OGATE,XP(A)::QAB(F)
- R(c);OGATE::QAB(F)
- R(c);OGATE,XP(C)::QAB(F)
- R(c);OGATE,P_PINR(I)::QAB(F)
- B(a);N_GUARD::B(E),XB(a)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- S(g);N_GUARD,XS(G)::R(I)
- S(g);N_GUARD::R(I)
- S(g);N_GUARD::R(I),XS(g)
- P(e);N_GUARD::R1(B)
- P(f);OGATE,XP(D)::R(I),XP(f)
- Tries
- Try
- S(G);
- Vars
- R(c);OGATE,XP(A)::QAB(F)
- R(c);OGATE,XP(C)::QAB(F)
- R(c);OGATE::QAB(F)
- B(a);N_GUARD::B(E),XB(a)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- S(g);N_GUARD::R(I)
- S(g);N_GUARD::R(I),XS(g)
- Refutation
- P(e);
- Try
- S(G);XS(g)
- Threat
- R(I)
- Vars
- R(c);OGATE,P_PINR(I)::QAB(F)
- Refutation
- P(e);
- Try
- S(G);
- Vars
- R(c);OGATE,XP(A)::QAB(F)
- R(c);OGATE,XP(C)::QAB(F)
- R(c);OGATE::QAB(F)
- R(c);OGATE,P_PINR(I)::QAB(F)
- B(a);N_GUARD::B(E),XB(a)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- S(g);N_GUARD::R(I)
- S(g);N_GUARD::R(I),XS(g)
- Refutation
- P(e);
- Try
- B(E);
- Vars
- R(c);OGATE,XP(A)::QAB(F)
- R(c);OGATE,XP(C)::QAB(F)
- S(g);N_GUARD,XS(G)::R(I)
- P(f);OGATE,XP(D)::R(I),XP(f)
- R(c);OGATE::QAB(F)
- R(c);OGATE,P_PINR(I)::QAB(F)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- S(g);N_GUARD::R(I)
- S(g);N_GUARD::R(I),XS(g)
- P(e);N_GUARD::R1(B)
- Refutation
- B(a);
- Try
- B(E);
- Vars
- R(c);OGATE,XP(A)::QAB(F)
- R(c);OGATE,XP(C)::QAB(F)
- S(g);N_GUARD,XS(G)::R(I)
- P(f);OGATE,XP(D)::R(I),XP(f)
- R(c);OGATE::QAB(F)
- R(c);OGATE,P_PINR(I)::QAB(F)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- S(g);N_GUARD::R(I)
- S(g);N_GUARD::R(I),XS(g)
- P(e);N_GUARD::R1(B)
- Refutation
- B(a);
- Try
- B(E);
- Vars
- R(c);OGATE,XP(A)::QAB(F)
- R(c);OGATE,XP(C)::QAB(F)
- S(g);N_GUARD,XS(G)::R(I)
- S(g);N_GUARD,XB(E)::R(I)
- P(f);OGATE,XP(D)::R(I),XP(f)
- R(c);OGATE::QAB(F)
- R(c);OGATE,P_PINR(I)::QAB(F)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- S(g);N_GUARD::R(I)
- S(g);N_GUARD::R(I),XS(g)
- P(e);N_GUARD::R1(B)
- Refutation
- B(a);
- Try
- B(K);
- Vars
- R(c);OGATE,XP(A)::QAB(F)
- R(c);OGATE,XP(C)::QAB(F)
- S(g);N_GUARD,XS(G)::R(I)
- P(f);OGATE,XP(D)::R(I),XP(f)
- B(a);N_GUARD::B(E),XB(a)
- R(c);OGATE::QAB(F)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- S(g);N_GUARD::R(I)
- S(g);N_GUARD::R(I),XS(g)
- P(e);N_GUARD::R1(B)
- Refutation
- P(h);
- Try
- R(B);XS(b)
- Threat
- DUALS(2)
- Vars
- R(c);XP(A)::B(E)
- B(a);::B(E)
- P(e);::B(E)
- Refutation
- P(e);XR(B)
- Try
- R(I);
- Vars
- R(c);OGATE,XP(A)::QAB(F)
- R(c);OGATE,XP(C)::QAB(F)
- S(g);N_GUARD,XS(G)::R(I)
- B(a);N_GUARD::B(E),XB(a)
- R(c);OGATE::QAB(F)
- R(c);OGATE,P_PINR(I)::QAB(F)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- S(g);N_GUARD::R(I)
- S(g);N_GUARD::R(I),XS(g)
- P(e);N_GUARD::R1(B)
- Refutation
- P(f);XP(D)
- Try
- R(I);XS(g)
- Threat
- R(I)
- Vars
- R(c);OGATE::QAB(F)
- S(b);N_GUARD::B(E),XS(b)
- Refutation
- R(c);CHECK
- Try
- Q(F);
- Threat
- QAR1(F)
- Vars
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- S(g);N_GUARD::R(I),XS(g)
- Refutation
- R(c);
- Try
- Actual
- R(I);
- Vars
- R(c);OGATE,XP(A)::QAB(F)
- R(c);OGATE,XP(C)::QAB(F)
- S(g);N_GUARD,XS(G)::R(I)
- P(f);XP(D)::S(G)
- B(a);N_GUARD::B(E),XB(a)
- R(c);OGATE::QAB(F)
- R(c);OGATE,P_PINR(I)::QAB(F)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- S(g);N_GUARD::R(I)
- S(g);N_GUARD::R(I),XS(g)
- P(e);N_GUARD::R1(B)
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).