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Problem Display

PID: 65813 (4K3/3PB3/BP1r3R/3kn3/2b5/3N1N2/2Q3P1/8 w - - 0 1)

Gold, Samuel

British Chess Magazine, 1889

4K3/3PB3/BP1r3R/3kn3/2b5/3N1N2/2Q3P1/8

#2

10 + 4

SOLUTION

SOUND
Sets
- 1...Kc6
  - 2.Rxd6#
- 1...Rxb6
  - 2.Sf4#
- 1...Rc6
  - 2.Sb4#
  - 2.Sf4#
- 1...Re6
  - 2.Sb4#
- 1...Rxd7
  - 2.Sb4#
  - 2.Sf4#
- 1...Ba2
  - 2.Sb4#
  - 2.Sf4#
- 1...Bb3
  - 2.Sb4#
  - 2.Sf4#
- 1...Bb5
  - 2.Sb4#
  - 2.Sf4#
- 1...Bxa6
  - 2.Sb4#
  - 2.Sf4#
- 1...Sxd3
  - 2.Qxc4#
- 1...Sxf3
  - 2.Qxc4#
- 1...Sg4
  - 2.Qxc4#
- 1...Sc6
  - 2.Qxc4#
- 1...Sg6
  - 2.Qxc4#
- 1...Sxd7
  - 2.Qxc4#
- 1...Sf7
  - 2.Qxc4#
Tries
- 1.Bb7+?
  - 1...Rc6
    - 2.Sb4#
    - 2.Sf4#
  - 1...Sc6!
- 1.Rh5?
  - threat
    - 2.Qxc4#
  - 1...Ke4
    - 2.Rxe5#
  - 1...Ke6
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Bxd3
    - 2.Rxe5#
  - 1...Bxa6
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Rc6
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Ba2
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Bb3
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Bb5
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Kc6!
Keys
- 1.Re6!
  - 1...Ke4
    - 2.Rxe5#
  - 1...Kc6
    - 2.Rxd6#
  - 1...Kxe6
    - 2.Sf4#
  - 1...Rxb6
    - 2.Sf4#
  - 1...Rxe6
    - 2.Sb4#
  - 1...Rxd7
    - 2.Sf4#
  - 1...Bxd3
    - 2.Rxe5#
  - 1...Bxa6
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Sxd3
    - 2.Qxc4#
  - 1...Sxf3
    - 2.Qxc4#
  - 1...Sxd7
    - 2.Qxc4#
  - 1...Rc6
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Ba2
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Bb3
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Bb5
    - 2.Sf4#
    - 2.Rxe5#
  - 1...Sg4
    - 2.Qxc4#
  - 1...Sc6
    - 2.Bxc4#
    - 2.Qxc4#
  - 1...Sg6
    - 2.Qxc4#
  - 1...Sf7
    - 2.Qxc4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
Sets
- K(b);P_SPINB(a),P_SPINR(d),S_FLIGHT::R1(G),XR(d)
- R(d);XP(F)::S(C)
- R(d);P_PINB(I)::S(C)
- S(c);N_GUARD,XS(C)::QAB1(A),XB(a)
- S(c);N_GUARD,XS(D)::QAB1(A),XB(a)
- S(c);N_GUARD::QAB1(A),XB(a)
- S(c);N_GUARD,XP(H)::QAB1(A),XB(a)
Tries
- Try
  - B(E);CHECK
  - Refutation
    - S(c);P_SPINS(c)
- Try
  - R(G);P_PINS(c)
  - Threat
    - QAB1(A),XB(a)
  - Vars
    - K(b);N_SPINS(c),S_FLIGHT::R1(G),XS(c)
    - B(a);XS(C)::R1(G),XS(c)
  - Refutation
    - K(b);N_SPINS(c),P_SPINB(a),S_FLIGHT
Actual
- R(G);
- Vars
  - K(b);P_SPINS(c),S_FLIGHT::R1(G),XS(c)
  - K(b);P_SPINB(a),P_SPINR(d),S_FLIGHT::R1(G),XR(d)
  - K(b);S_FLIGHT,XR(G)::S(C)
  - R(d);XP(F)::S(C)
  - R(d);P_PINB(I),SBLOCK,XR(G)::S(C)
  - R(d);XP(H)::S(C)
  - B(a);XS(C)::R1(G),XS(c)
  - S(c);N_GUARD,XS(C)::QAB1(A),XB(a)
  - S(c);N_GUARD,XS(D)::QAB1(A),XB(a)
  - S(c);N_GUARD,XP(H)::QAB1(A),XB(a)
  - S(c);N_GUARD::QAB1(A),XB(a)

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).