MESON Chess Problem Database
Problem Display
PID: 52697 (4NNnB/1Bp5/1n1b1P1p/1r3k2/R4p1P/2P2P1b/4R2K/4Q3 w - - 0 1)
Neale, Harry R
The Observer, 1937
(First published on Sun Nov 21 1937)
#2
12 + 9
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Qxb1#
- 1...Ra5
- 2.Qb1#
- 1...Rc5
- 2.Qb1#
- 1...Bb4
- 2.Qb1#
- 1...Bc5
- 2.Re5#
- 1...Be5
- 2.Be4#
- 1...Sxa4
- 2.Bc8#
- 1...Sc4
- 2.Bc8#
- 1...Sd5
- 2.Bc8#
- 1...Sa8
- 2.Bc8#
- 1...Sc8
- 2.Bxc8#
- 1...Sxf6
- 2.Sg7#
- 1...c5
- 2.Sxd6#
- 1...c6
- 2.Sxd6#
- 1...Rb1
- Tries
- 1.Bc8+?
- 1...Sd7
- 2.Bxd7#
- 1...Sxc8!
- 1...Sd7
- 1.Rc2?
- threat
- 2.Qe4#
- 2.Qe6#
- 1...Bxf8
- 2.Qe4#
- 1...Sxf6
- 2.Sg7#
- 2.Qe6#
- 1...Rb4
- 2.Qe6#
- 1...Be5
- 2.Be4#
- 2.Qe4#
- 1...Re5!
- threat
- 1.Rd2?
- threat
- 2.Qe4#
- 2.Qe6#
- 1...Bxf8
- 2.Qe4#
- 1...Sxf6
- 2.Sg7#
- 2.Qe6#
- 1...Rb4
- 2.Qe6#
- 1...Be5
- 2.Be4#
- 2.Qe4#
- 1...Re5!
- threat
- 1.Rf2?
- threat
- 2.Qe4#
- 2.Qe6#
- 1...Bxf8
- 2.Qe4#
- 1...Sxf6
- 2.Sg7#
- 2.Qe6#
- 1...Rb4
- 2.Qe6#
- 1...Be5
- 2.Be4#
- 2.Qe4#
- 1...Re5!
- threat
- 1.Rg2?
- threat
- 2.Qe4#
- 2.Qe6#
- 1...Bxf8
- 2.Qe4#
- 1...Sxf6
- 2.Sg7#
- 2.Qe6#
- 1...Rb4
- 2.Qe6#
- 1...Be5
- 2.Be4#
- 2.Qe4#
- 1...Re5!
- threat
- 1.Re5+?
- 1...Bxe5
- 2.Be4#
- 2.Qe4#
- 1...Rxe5!
- 1...Bxe5
- 1.Re6?
- threat
- 2.Sg7#
- 2.Be4#
- 2.Qe4#
- 1...Bxf8
- 2.Qe4#
- 1...Sxf6
- 2.Sg7#
- 2.Rxf6#
- 1...Re5
- 2.Sg7#
- 1...Rb4
- 2.Sg7#
- 1...Rd5
- 2.Sg7#
- 2.Qe4#
- 1...Sd5
- 2.Sg7#
- 2.Qe4#
- 1...c6
- 2.Sxd6#
- 2.Sg7#
- 2.Qe4#
- 1...Rb2+!
- threat
- 1.Qg3?
- threat
- 2.Qxh3#
- 2.Qg6#
- 1...Bxf8
- 2.Rxf4#
- 1...Sxf6
- 2.Sg7#
- 2.Qg6#
- 1...Bf1
- 2.Qg4#
- 2.Qg6#
- 1...Bg2
- 2.Qg4#
- 2.Qg6#
- 1...Bg4
- 2.Qxg4#
- 2.fxg4#
- 1...Se7
- 2.Qxh3#
- 1...fxg3+!
- threat
- 1.Bc8+?
- Keys
- 1.Ra5!
- threat
- 2.Qb1#
- 1...Sxf6
- 2.Sg7#
- 1...Bc5
- 2.Re5#
- 1...Be5
- 2.Be4#
- 1...Sd5
- 2.Bc8#
- 1...c5
- 2.Sxd6#
- threat
- 1.Ra5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- R(c);N_GUARD::QAB(A),XR(c)
- R(c);N_GUARD::QAB(A)
- B(f);S_CUTR(c)::QAB(A)
- B(f);N_GUARD,S_CUTR(c)::R1(B)
- B(f);SBLOCK::B(I)
- S(e);N_GUARD,XR(F)::B(I)
- S(e);N_GUARD::B(I)
- S(e);N_GUARD::B(I),XS(e)
- S(i);SBLOCK,XP(H)::S(J)
- P(h);N_GUARD::S(J),XB(f)
- Tries
- Try
- B(I);CHECK
- Vars
- S(e);N_GUARD,P_SPINS(e)::B(I),XS(e)
- Refutation
- S(e);XB(I)
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- B(f);XS(K)::QAB1(A)
- R(c);::QAB1(A)
- Refutation
- R(c);
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- B(f);XS(K)::QAB1(A)
- R(c);::QAB1(A)
- Refutation
- R(c);
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- B(f);XS(K)::QAB1(A)
- R(c);::QAB1(A)
- Refutation
- R(c);
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- B(f);XS(K)::QAB1(A)
- R(c);::QAB1(A)
- Refutation
- R(c);
- Try
- R(B);CHECK
- Refutation
- R(c);XR(B)
- Try
- R(B);
- Threat
- DUALS(3)
- Vars
- B(f);XS(K)::QAB1(A)
- R(c);::S(J)
- Refutation
- R(c);CHECK
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(f);N_GUARD,XS(K)::R1(F),XP(b)
- S(i);::QAB(A),XB(a)
- Refutation
- P(b);CHECK,XQ(A)
- Try
- Actual
- R(F);P_PINR(c)
- Threat
- QAB(A)
- Vars
- S(i);SBLOCK,XP(H)::S(J)
- B(f);N_GUARD,N_SPINR(c),S_CUTR(c)::R1(B)
- B(f);N_SPINR(c),SBLOCK::B(I)
- S(e);N_GUARD,N_SPINR(c)::B(I)
- P(h);N_GUARD,N_SPINR(c)::S(J),XB(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).