MESON Chess Problem Database
Problem Display
PID: 187120 (8/1K6/pPRpp3/QnpkP2p/3p3R/4pN1B/P3P3/3N4 w - - 0 1)
Lyness, Robert Cranston
The Observer, 1934
(First published on Sun Aug 19 1934)
#2
11 + 9
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Kc4
- 2.Sxe3#
- 1...Sa3
- 2.Rxd4#
- 1...Sc3
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...d3
- 2.Sxe3#
- 1...c4
- 2.Rxd4#
- 1...dxe5
- 2.Bxe6#
- 1...Kc4
- Tries
- 1.Sb2?
- 1...dxe5
- 2.Bxe6#
- 1...Sa3
- 2.Rxd4#
- 2.Rxd6#
- 1...Sc3
- 2.Rxd4#
- 2.Rxd6#
- 1...Sa7
- 2.Rxd4#
- 2.Rxd6#
- 1...Sc7
- 2.Rxd4#
- 2.Rxd6#
- 1...c4
- 2.Rxd4#
- 1...d3!
- 1...dxe5
- 1.Bf1?
- 1...Kc4
- 2.Sxe3#
- 1...Sa3
- 2.Rxd4#
- 1...Sc3
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...d3
- 2.Sxe3#
- 1...c4
- 2.Rxd4#
- 1...dxe5!
- 1...Kc4
- 1.Bg2?
- 1...Kc4
- 2.Sxe3#
- 1...Sa3
- 2.Rxd4#
- 1...Sc3
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...d3
- 2.Sxe3#
- 1...c4
- 2.Rxd4#
- 1...dxe5!
- 1...Kc4
- 1.Bf5?
- 1...Kc4
- 2.Sxe3#
- 1...dxe5
- 2.Bxe6#
- 1...Sa3
- 2.Rxd4#
- 1...Sc3
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...d3
- 2.Sxe3#
- 1...c4
- 2.Be4#
- 2.Rxd4#
- 1...exf5!
- 1...Kc4
- 1.Rf4?
- 1...Kc4
- 2.Sxe3#
- 1...dxe5
- 2.Bxe6#
- 1...Sa3
- 2.Rxd4#
- 1...Sc3
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...d3
- 2.Sxe3#
- 1...c4
- 2.Rxd4#
- 1...h4!
- 1...Kc4
- 1.Rxd6+?
- 1...Kc4
- 2.Sb2#
- 2.Sxe3#
- 2.Bxe6#
- 2.Qa4#
- 1...Sxd6+!
- 1...Kc4
- 1.Rc7?
- 1...Kc4
- 2.Sxe3#
- 1...Sxc7
- 2.Rxd4#
- 1...Sa3
- 2.Rxd4#
- 1...Sc3
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...d3
- 2.Sxe3#
- 1...c4
- 2.Rxd4#
- 1...dxe5!
- 1...Kc4
- 1.Rc8?
- 1...Kc4
- 2.Sxe3#
- 1...Sa3
- 2.Rxd4#
- 1...Sc3
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...d3
- 2.Sxe3#
- 1...c4
- 2.Rxd4#
- 1...dxe5!
- 1...Kc4
- 1.Qd2?
- threat
- 2.Sxe3#
- 1...Kc4
- 2.Sxe3#
- 1...exd2!
- threat
- 1.Qa4?
- 1...dxe5
- 2.Bxe6#
- 1...Sa3
- 2.Rxd6#
- 1...Sc3
- 2.Rxd6#
- 1...Sa7
- 2.Rxd6#
- 1...Sc7
- 2.Rxd6#
- 1...d3
- 2.Sxe3#
- 2.Qc4#
- 2.Qe4#
- 1...c4
- 2.Qxc4#
- 1...a5!
- 1...dxe5
- 1.Qxb5?
- threat
- 2.Rxd4#
- 2.Rxd6#
- 1...dxe5
- 2.Bxe6#
- 2.Qxc5#
- 1...d3
- 2.Sc3#
- 2.Sxe3#
- 2.Rd4#
- 2.Rxd6#
- 2.Qxd3#
- 2.Qc4#
- 1...axb5!
- threat
- 1.a3?
- 1...Sxa3
- 2.Rxd4#
- 1...dxe5
- 2.Bxe6#
- 1...Sc3
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...d3
- 2.Sxe3#
- 1...c4
- 2.Rxd4#
- 1...Kc4!
- 1...Sxa3
- 1.a4?
- 1...dxe5
- 2.Bxe6#
- 1...Sa3
- 2.Rxd4#
- 1...Sc3
- 2.Rxd4#
- 1...Sa7
- 2.Rxd4#
- 1...Sc7
- 2.Rxd4#
- 1...d3
- 2.Sxe3#
- 1...c4
- 2.Rxd4#
- 1...Kc4!
- 1...dxe5
- 1.Sb2?
- Keys
- 1.Qxa6!
- 1...Kc4
- 2.Rxd4#
- 1...dxe5
- 2.Bxe6#
- 1...Sa3
- 2.Rxd6#
- 1...Sc3
- 2.Rxd6#
- 1...Sa7
- 2.Rxd6#
- 1...Sc7
- 2.Rxd6#
- 1...d3
- 2.Sxe3#
- 1...c4
- 2.Qxb5#
- 1...Kc4
- 1.Qxa6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- K(e);P_SPINP(b),S_FLIGHT::S(A),XP(a)
- S(c);N_GUARD,P_SPINP(d)::R1(F),XP(b)
- P(b);N_GUARD::S(A),XP(a)
- P(d);N_GUARD,P_SPINS(c)::R1(F),XP(b)
- P(h);XP(H)::B(E),XP(i)
- Tries
- Try
- S(A);
- Vars
- P(h);XP(H)::B(E),XP(i)
- P(d);N_GUARD,P_SPINS(c)::R1(F),XP(b)
- Refutation
- P(b);
- Try
- B(E);
- Vars
- K(e);P_SPINP(b),S_FLIGHT::S(A),XP(a)
- S(c);N_GUARD,P_SPINP(d)::R1(F),XP(b)
- P(b);N_GUARD::S(A),XP(a)
- P(d);N_GUARD,P_SPINS(c)::R1(F),XP(b)
- Refutation
- P(h);XP(H)
- Try
- B(E);
- Vars
- K(e);P_SPINP(b),S_FLIGHT::S(A),XP(a)
- S(c);N_GUARD,P_SPINP(d)::R1(F),XP(b)
- P(b);N_GUARD::S(A),XP(a)
- P(d);N_GUARD,P_SPINS(c)::R1(F),XP(b)
- Refutation
- P(h);XP(H)
- Try
- B(E);
- Vars
- K(e);P_SPINP(b),S_FLIGHT::S(A),XP(a)
- P(h);XP(H)::B(E),XP(i)
- S(c);N_GUARD,P_SPINP(d)::R1(F),XP(b)
- P(b);N_GUARD::S(A),XP(a)
- Refutation
- P(i);XB(E)
- Try
- R(F);
- Vars
- K(e);P_SPINP(b),S_FLIGHT::S(A),XP(a)
- P(h);XP(H)::B(E),XP(i)
- S(c);N_GUARD,P_SPINP(d)::R1(F),XP(b)
- P(b);N_GUARD::S(A),XP(a)
- P(d);N_GUARD,P_SPINS(c)::R1(F),XP(b)
- Refutation
- P(f);
- Try
- R(J);CHECK,XP(h)
- Refutation
- S(c);CHECK,P_SPINP(d),XR(J)
- Try
- R(J);
- Vars
- K(e);P_SPINP(b),S_FLIGHT::S(A),XP(a)
- S(c);N_GUARD,P_SPINP(d),XR(J)::R1(F),XP(b)
- S(c);N_GUARD,P_SPINP(d)::R1(F),XP(b)
- P(b);N_GUARD::S(A),XP(a)
- P(d);N_GUARD,P_SPINS(c)::R1(F),XP(b)
- Refutation
- P(h);XP(H)
- Try
- R(J);
- Vars
- K(e);P_SPINP(b),S_FLIGHT::S(A),XP(a)
- S(c);N_GUARD,P_SPINP(d)::R1(F),XP(b)
- P(b);N_GUARD::S(A),XP(a)
- P(d);N_GUARD,P_SPINS(c)::R1(F),XP(b)
- Refutation
- P(h);XP(H)
- Try
- Q(G);P_PINP(b)
- Threat
- S(A),XP(a)
- Vars
- K(e);S_FLIGHT::S(A),XP(a)
- Refutation
- P(a);N_SPINP(b),XQ(G)
- Try
- Q(G);
- Vars
- P(h);XP(H)::B(E),XP(i)
- S(c);N_GUARD::R1(J),XP(h)
- P(d);::QAB1(G),XP(d)
- Refutation
- P(g);
- Try
- Q(G);P_PINP(d),XS(c)
- Threat
- DUALS(2)
- Refutation
- P(g);N_SPINP(d),XQ(G)
- Try
- P(B);
- Vars
- S(c);N_GUARD,P_SPINP(d),XP(B)::R1(F),XP(b)
- P(h);XP(H)::B(E),XP(i)
- S(c);N_GUARD,P_SPINP(d)::R1(F),XP(b)
- P(b);N_GUARD::S(A),XP(a)
- P(d);N_GUARD,P_SPINS(c)::R1(F),XP(b)
- Refutation
- K(e);P_SPINP(b),S_FLIGHT
- Try
- P(B);
- Vars
- P(h);XP(H)::B(E),XP(i)
- S(c);N_GUARD,P_SPINP(d)::R1(F),XP(b)
- P(b);N_GUARD::S(A),XP(a)
- P(d);N_GUARD,P_SPINS(c)::R1(F),XP(b)
- Refutation
- K(e);P_SPINP(b),S_FLIGHT
- Try
- Actual
- Q(G);XP(g)
- Vars
- K(e);P_SPINP(b),P_SPINS(c),S_FLIGHT::R1(F),XP(b)
- P(h);XP(H)::B(E),XP(i)
- S(c);N_GUARD::R1(J),XP(h)
- P(b);N_GUARD::S(A),XP(a)
- P(d);OGATEB::QAR2(G),XS(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).