MESON Chess Problem Database
Problem Display
PID: 510 (2n5/2P4p/3B3Q/1P1k4/2rbb1N1/1N1R1p1K/5P2/4Rn2 w - - 0 1)
Smedley, Don A
The Observer, 1957
#2
10 + 8
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Rxd4#
- 1...Rc2
- 2.Rxd4#
- 1...Rc3
- 2.Rxd4#
- 1...Rc5
- 2.Rxd4#
- 1...Rc6
- 2.Rxd4#
- 1...Rxc7
- 2.Rxd4#
- 1...Bxd3
- 2.Qe6#
- 1...Bf5
- 2.Re5#
- 1...Sd2
- 2.Se3#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Rc1
- Tries
- 1.Bg3?
- 1...Rxc7
- 2.Rxd4#
- 1...Bxd3
- 2.Qe6#
- 1...Rc1
- 2.Rxd4#
- 1...Rc2
- 2.Rxd4#
- 1...Rc3
- 2.Rxd4#
- 1...Ra4
- 2.Qc6#
- 1...Rb4
- 2.Qc6#
- 1...Rc5
- 2.Rxd4#
- 1...Rc6
- 2.Rxd4#
- 2.Qxc6#
- 1...Bf5
- 2.Re5#
- 1...Bg6
- 2.Sf6#
- 1...Sd2
- 2.Se3#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb6
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sa7
- 2.Qd6#
- 1...Se7
- 2.Qd6#
- 1...Sxg3!
- 1...Rxc7
- 1.Rxe4?
- threat
- 2.Re5#
- 2.Qe6#
- 1...Rxc7
- 2.Rdxd4#
- 2.Rexd4#
- 2.Qe6#
- 1...Rc1
- 2.Rdxd4#
- 2.Rexd4#
- 2.Qe6#
- 1...Rc2
- 2.Rdxd4#
- 2.Rexd4#
- 2.Qe6#
- 1...Rc3
- 2.Rdxd4#
- 2.Rexd4#
- 2.Qe6#
- 1...Ra4
- 2.Qe6#
- 1...Rb4
- 2.Qe6#
- 1...Rc5
- 2.Rdxd4#
- 2.Rexd4#
- 2.Qe6#
- 1...Rc6
- 2.Rdxd4#
- 2.Rexd4#
- 2.Qe6#
- 1...Kxe4!
- threat
- 1.Bg3?
- Keys
- 1.Bf4!
- 1...Rxc7
- 2.Rxd4#
- 1...Bxd3
- 2.Qe6#
- 1...Rc1
- 2.Rxd4#
- 1...Rc2
- 2.Rxd4#
- 1...Rc3
- 2.Rxd4#
- 1...Ra4
- 2.Qc6#
- 1...Rb4
- 2.Qc6#
- 1...Rc5
- 2.Rxd4#
- 1...Rc6
- 2.Rxd4#
- 2.Qxc6#
- 1...Sd2
- 2.Se3#
- 1...Bf5
- 2.Re5#
- 1...Bg6
- 2.Sf6#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sb6
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sa7
- 2.Qd6#
- 1...Se7
- 2.Qd6#
- 1...Rxc7
- 1.Bf4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 1
- Sets
- R(c);N_GUARD::R1(D),XB(d)
- R(c);N_GUARD,XP(J)::R1(D),XB(d)
- B(e);N_SPINB(d),XR(D)::QAB1(I)
- B(e);OGATE,P_PINS(F)::R1(A)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- Tries
- Try
- B(H);
- Vars
- R(c);N_GUARD,XP(J)::R1(D),XB(d)
- B(e);N_SPINB(d),XR(D)::QAB1(I)
- R(c);N_GUARD::R1(D),XB(d)
- R(c);N_GUARD::QAB1(I)
- B(e);OGATE,P_PINS(F)::R1(A)
- B(e);::S(F)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(h);N_GUARD::QAR1(I)
- S(h);N_GUARD::QAR1(I),XS(h)
- Refutation
- S(a);XB(H)
- Try
- R(A);XB(e)
- Threat
- DUALS(2)
- Vars
- R(c);::QAB1(I)
- Refutation
- K(f);N_SPINB(d),S_FLIGHT,XR(A)
- Try
- Actual
- B(H);
- Vars
- R(c);N_GUARD,XP(J)::R1(D),XB(d)
- B(e);N_SPINB(d),XR(D)::QAB1(I)
- R(c);N_GUARD::R1(D),XB(d)
- R(c);N_GUARD::QAB1(I)
- S(a);N_GUARD::S(F)
- B(e);OGATE,P_PINS(F)::R1(A)
- B(e);::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(h);N_GUARD::QAR1(I)
- S(h);N_GUARD::QAR1(I),XS(h)
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).