MESON Chess Problem Database
Problem Display
PID: 141396 (3K3b/3BBp1r/b1R5/r3k1N1/7p/3PP1nP/1NP1n1Q1/8 w - - 0 1)
Ryan, RE
The Observer, 1936
(First published on Sun Aug 2 1936)
#2
11 + 9
| 15368 | Ryan Scrapbook | 2011 |
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rc5#
- 1...Ra2
- 2.Rc5#
- 1...Ra3
- 2.Rc5#
- 1...Ra4
- 2.Rc5#
- 1...Rb5
- 2.Sc4#
- 1...Rc5
- 2.Rxc5#
- 1...Rd5
- 2.Sf3#
- 1...Rh5
- 2.Sxf7#
- 1...Rh6
- 2.Sxf7#
- 1...Rg7
- 2.Bf6#
- 1...Bxd3
- 2.Sxd3#
- 1...Bc4
- 2.Sxc4#
- 1...Bb5
- 2.Rc5#
- 1...Bb7
- 2.Sc4#
- 1...Bc8
- 2.Sc4#
- 1...Bf6
- 2.Bxf6#
- 1...Bg7
- 2.Sxf7#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sf4
- 2.d4#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...f5
- 2.Re6#
- 1...f6
- 2.Bd6#
- 1...Ra1
- Tries
- 1.Kc7?
- 1...Bxd3
- 2.Sxd3#
- 1...Se4
- 2.Qxe4#
- 1...Ra1
- 2.Rc5#
- 1...Ra2
- 2.Rc5#
- 1...Ra3
- 2.Rc5#
- 1...Ra4
- 2.Rc5#
- 1...Rb5
- 2.Sc4#
- 1...Rc5
- 2.Rxc5#
- 1...Rd5
- 2.Sf3#
- 1...Rh5
- 2.Sxf7#
- 1...Rh6
- 2.Sxf7#
- 1...Rg7
- 2.Bf6#
- 1...Bc4
- 2.Sxc4#
- 1...Bb5
- 2.Rc5#
- 1...Bb7
- 2.Sc4#
- 1...Bc8
- 2.Sc4#
- 1...Bf6
- 2.Bd6#
- 2.Bxf6#
- 1...Bg7
- 2.Sxf7#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sf4
- 2.d4#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...f5
- 2.Re6#
- 1...f6
- 2.Bd6#
- 1...Sd4!
- 1...Bxd3
- 1.Ke8?
- 1...Bxd3
- 2.Sxd3#
- 1...Se4
- 2.Qxe4#
- 1...Ra1
- 2.Rc5#
- 1...Ra2
- 2.Rc5#
- 1...Ra3
- 2.Rc5#
- 1...Ra4
- 2.Rc5#
- 1...Rb5
- 2.Sc4#
- 1...Rc5
- 2.Rxc5#
- 1...Rd5
- 2.Sf3#
- 1...Rh5
- 2.Sxf7#
- 1...Rh6
- 2.Sxf7#
- 1...Rg7
- 2.Bf6#
- 1...Bc4
- 2.Sxc4#
- 1...Bb5
- 2.Rc5#
- 1...Bb7
- 2.Sc4#
- 1...Bc8
- 2.Sc4#
- 1...Bf6
- 2.Bd6#
- 2.Bxf6#
- 1...Bg7
- 2.Sxf7#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sf4
- 2.d4#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...f5
- 2.Re6#
- 1...f6
- 2.Bd6#
- 1...Sd4!
- 1...Bxd3
- 1.Sxh7?
- threat
- 2.Bd6#
- 1...Se4
- 2.Qxe4#
- 1...Bf6
- 2.Bxf6#
- 1...Sf5
- 2.Qe4#
- 1...Rd5!
- threat
- 1.Rd6?
- threat
- 2.Sf3#
- 1...Bxd3
- 2.Sxd3#
- 1...Bb7
- 2.Sc4#
- 1...Sg1
- 2.d4#
- 1...Sd4!
- threat
- 1.Qf3?
- threat
- 2.Bd6#
- 1...Se4
- 2.Qxe4#
- 2.Qf5#
- 1...Rh6
- 2.Sxf7#
- 1...Bf6
- 2.Bxf6#
- 1...Sf4
- 2.d4#
- 1...Sf5
- 2.Qe4#
- 2.Qxf5#
- 1...f5
- 2.Re6#
- 1...Rd5!
- threat
- 1.Qd5+?
- 1...Rxd5
- 2.Sf3#
- 1...Kxd5!
- 1...Rxd5
- 1.c4?
- threat
- 2.Sf3#
- 1...Bxc4
- 2.Sxc4#
- 1...Sg1
- 2.d4#
- 1...Sd4!
- threat
- 1.Kc7?
- Keys
- 1.c3!
- 1...Bxd3
- 2.Sxd3#
- 1...Sxc3
- 2.d4#
- 1...Se4
- 2.Qxe4#
- 1...Sd4
- 2.cxd4#
- 1...Ra1
- 2.Rc5#
- 1...Ra2
- 2.Rc5#
- 1...Ra3
- 2.Rc5#
- 1...Ra4
- 2.Rc5#
- 1...Rb5
- 2.Sc4#
- 1...Rc5
- 2.Rxc5#
- 1...Rd5
- 2.Sf3#
- 1...Rh5
- 2.Sxf7#
- 1...Rh6
- 2.Sxf7#
- 1...Rg7
- 2.Bf6#
- 1...Bc4
- 2.Sxc4#
- 1...Bb5
- 2.Rc5#
- 1...Bb7
- 2.Sc4#
- 1...Bc8
- 2.Sc4#
- 1...Bf6
- 2.Bxf6#
- 1...Bg7
- 2.Sxf7#
- 1...Sc1
- 2.d4#
- 1...Sg1
- 2.d4#
- 1...Sf4
- 2.d4#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...f5
- 2.Re6#
- 1...f6
- 2.Bd6#
- 1...Bxd3
- 1.c3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(d);N_GUARD::R(H)
- R(d);S_CUTB(f)::S(A)
- R(d);N_GUARD::R(H),XR(d)
- R(d);P_PINB(I),SBLOCK::S(G)
- R(h);N_GUARD::S(G),XP(g)
- R(h);S_CUTB(i)::B(J)
- B(f);XP(D)::S(A),XB(f)
- B(f);N_GUARD::S(A),XB(f)
- B(f);S_CUTR(d)::R(H)
- B(f);N_GUARD::S(A)
- B(i);N_GUARD,P_PINB(J)::B(J),XB(i)
- B(i);S_CUTR(h)::S(G),XP(g)
- S(a);N_GUARD::P(D)
- S(b);N_GUARD::QAR1(C)
- S(b);N_GUARD::QAR1(C),XS(b)
- P(g);N_GUARD,SBLOCK::R1(H)
- P(g);SBLOCK::B(J)
- Tries
- Try
- K(K);S_FLIGHT
- Vars
- B(f);XP(D)::S(A),XB(f)
- S(b);N_GUARD::QAR1(C),XS(b)
- R(d);N_GUARD::R(H)
- R(d);S_CUTB(f)::S(A)
- R(d);N_GUARD,P_PINR(H)::R(H),XR(d)
- R(d);SBLOCK::S(G)
- R(h);N_GUARD::S(G),XP(g)
- R(h);S_CUTB(i)::B(J)
- B(f);N_GUARD::S(A),XB(f)
- B(f);S_CUTR(d)::R(H)
- B(f);N_GUARD::S(A)
- B(i);S_CUTR(h)::S(G),XP(g)
- S(a);N_GUARD::P(D)
- S(b);N_GUARD::QAR1(C)
- P(g);N_GUARD,SBLOCK::R1(H)
- P(g);SBLOCK::B(J)
- Refutation
- S(a);
- Try
- K(K);P-FLIGHT
- Vars
- B(f);XP(D)::S(A),XB(f)
- S(b);N_GUARD::QAR1(C),XS(b)
- R(d);N_GUARD::R(H)
- R(d);S_CUTB(f)::S(A)
- R(d);N_GUARD::R(H),XR(d)
- R(d);SBLOCK::S(G)
- R(h);N_GUARD::S(G),XP(g)
- R(h);S_CUTB(i)::B(J)
- B(f);N_GUARD::S(A),XB(f)
- B(f);S_CUTR(d)::R(H)
- B(f);N_GUARD::S(A)
- B(i);S_CUTR(h)::S(G),XP(g)
- S(a);N_GUARD::P(D)
- S(b);N_GUARD::QAR1(C)
- P(g);N_GUARD,SBLOCK::R1(H)
- P(g);SBLOCK::B(J)
- Refutation
- S(a);
- Try
- S(G);XR(h)
- Threat
- B(J)
- Vars
- S(b);N_GUARD::QAR1(C),XS(b)
- B(i);N_GUARD,P_PINB(J)::B(J),XB(i)
- S(b);N_GUARD::QAR1(C)
- Refutation
- R(d);P_PINB(I)
- Try
- R(H);
- Threat
- S(G)
- Vars
- B(f);XP(D)::S(A),XB(f)
- B(f);N_GUARD::S(A)
- S(a);N_GUARD::P(D)
- Refutation
- S(a);
- Try
- Q(C);
- Threat
- B(J)
- Vars
- R(h);N_GUARD::S(G),XP(g)
- B(i);N_GUARD,P_PINB(J)::B(J),XB(i)
- S(a);N_GUARD::P(D)
- P(g);N_GUARD::R1(H)
- Refutation
- R(d);P_PINB(I)
- Try
- Q(C);CHECK
- Vars
- R(d);P_PINB(I),SBLOCK,XQ(C)::S(G)
- Refutation
- K(e);P-FLIGHT,XQ(C)
- Try
- P(B);
- Threat
- S(G)
- Vars
- B(f);XP(B)::S(A),XB(f)
- S(a);N_GUARD::P(D)
- Refutation
- S(a);
- Try
- Actual
- P(B);
- Vars
- B(f);XP(D)::S(A),XB(f)
- S(a);N_GUARD,XP(B)::P(D)
- S(b);N_GUARD::QAR1(C),XS(b)
- S(a);OGATE::P(B),XS(a)
- R(d);N_GUARD::R(H)
- R(d);S_CUTB(f)::S(A)
- R(d);N_GUARD::R(H),XR(d)
- R(d);P_PINB(I),SBLOCK::S(G)
- R(h);N_GUARD::S(G),XP(g)
- R(h);S_CUTB(i)::B(J)
- B(f);N_GUARD::S(A),XB(f)
- B(f);S_CUTR(d)::R(H)
- B(f);N_GUARD::S(A)
- B(i);N_GUARD,P_PINB(J)::B(J),XB(i)
- B(i);S_CUTR(h)::S(G),XP(g)
- S(a);N_GUARD::P(D)
- S(b);N_GUARD::QAR1(C)
- P(g);N_GUARD,SBLOCK::R1(H)
- P(g);SBLOCK::B(J)
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).