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Problem Display

PID: 225927 (2QR3K/8/2RP2B1/3kp3/r4p2/b3p3/4N1N1/8 w - - 0 1)

Eliasson, J

Tidskrift for Schack, 1910

2QR3K/8/2RP2B1/3kp3/r4p2/b3p3/4N1N1/8

#2

8 + 6

SOLUTION

SOUND
Sets
- 1...Rb4
  - 2.Rc5#
- 1...Rd4
  - 2.Sc3#
- 1...Re4
  - 2.Bf7#
- 1...Bc1
  - 2.Rc5#
- 1...Bb2
  - 2.Rc5#
- 1...Bc5
  - 2.Rxc5#
- 1...Bxd6
  - 2.Rc5#
  - 2.Rcxd6#
  - 2.Rdxd6#
- 1...f3
  - 2.Sxe3#
Tries
- 1.Rc1?
  - 1...Bxd6
    - 2.Rc5#
  - 1...e4
    - 2.Qf5#
  - 1...Rc4
    - 2.Qxc4#
  - 1...Rb4
    - 2.Rc5#
  - 1...Rd4
    - 2.Sc3#
  - 1...Re4
    - 2.Bf7#
  - 1...Ra5
    - 2.Rd1#
    - 2.Qc4#
  - 1...Ra6
    - 2.Rd1#
    - 2.Qc4#
  - 1...Ra7
    - 2.Rd1#
    - 2.Qc4#
  - 1...Ra8
    - 2.Rd1#
    - 2.Qc4#
  - 1...Bb2
    - 2.Rc5#
  - 1...Bb4
    - 2.Qc4#
  - 1...Bc5
    - 2.Rxc5#
  - 1...f3
    - 2.Sxe3#
  - 1...Bxc1!
- 1.Rc3?
  - 1...Bxd6
    - 2.Rc5#
  - 1...e4
    - 2.Qf5#
  - 1...Rc4
    - 2.Qxc4#
  - 1...Rb4
    - 2.Rc5#
  - 1...Re4
    - 2.Bf7#
  - 1...Ra5
    - 2.Rd3#
    - 2.Qc4#
  - 1...Ra6
    - 2.Rd3#
    - 2.Qc4#
  - 1...Ra7
    - 2.Rd3#
    - 2.Qc4#
  - 1...Ra8
    - 2.Rd3#
    - 2.Qc4#
  - 1...Bc1
    - 2.Rc5#
  - 1...Bb2
    - 2.Rc5#
  - 1...Bb4
    - 2.Rd3#
    - 2.Qc4#
  - 1...Bc5
    - 2.Rxc5#
  - 1...f3
    - 2.Sxe3#
  - 1...Rd4!
Keys
- 1.Rc2!
  - 1...Bxd6
    - 2.Rc5#
  - 1...e4
    - 2.Qf5#
  - 1...Rc4
    - 2.Qxc4#
  - 1...Rb4
    - 2.Rc5#
  - 1...Rd4
    - 2.Sc3#
  - 1...Re4
    - 2.Bf7#
  - 1...Ra5
    - 2.Qc4#
  - 1...Ra6
    - 2.Qc4#
  - 1...Ra7
    - 2.Qc4#
  - 1...Ra8
    - 2.Qc4#
  - 1...Bc1
    - 2.Rc5#
  - 1...Bb2
    - 2.Rc5#
  - 1...Bb4
    - 2.Qc4#
  - 1...Bc5
    - 2.Rxc5#
  - 1...f3
    - 2.Sxe3#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 0
Sets
- R(c);S_CUTB(a)::R1(C)
- R(c);SBLOCK::S(A)
- R(c);SBLOCK::B(E)
- B(a);N_GUARD::R1(C)
- B(a);N_GUARD::R1(C),XB(a)
- P(d);N_GUARD::S(B),XP(b)
Tries
- Try
  - R(C);
  - Vars
    - B(a);N_GUARD,P_SPINB(a),XP(D)::R1(C)
    - P(f);OGATEB::QAR2(F)
    - R(c);N_GUARD::QAB1(F),XR(c)
    - R(c);S_CUTB(a)::R1(C)
    - R(c);SBLOCK::S(A)
    - R(c);SBLOCK::B(E)
    - B(a);N_GUARD::R1(C)
    - B(a);S_CUTR(c)::QAB1(F)
    - B(a);N_GUARD::R1(C),XB(a)
    - P(d);N_GUARD::S(B),XP(b)
  - Refutation
    - B(a);XR(C)
- Try
  - R(C);
  - Vars
    - B(a);N_GUARD,P_SPINB(a),XP(D)::R1(C)
    - P(f);OGATEB::QAR2(F)
    - R(c);N_GUARD::QAB1(F),XR(c)
    - R(c);S_CUTB(a)::R1(C)
    - R(c);SBLOCK::B(E)
    - B(a);N_GUARD::R1(C)
    - B(a);N_GUARD::R1(C),XB(a)
    - P(d);N_GUARD::S(B),XP(b)
  - Refutation
    - R(c);
Actual
- R(C);
- Vars
  - B(a);N_GUARD,P_SPINB(a),XP(D)::R1(C)
  - P(f);OGATEB::QAR2(F)
  - R(c);N_GUARD::QAB1(F),XR(c)
  - R(c);S_CUTB(a)::R1(C)
  - R(c);SBLOCK::S(A)
  - R(c);SBLOCK::B(E)
  - R(c);N_GUARD::QAB1(F)
  - B(a);N_GUARD::R1(C)
  - B(a);S_CUTR(c)::QAB1(F)
  - B(a);N_GUARD::R1(C),XB(a)
  - P(d);N_GUARD::S(B),XP(b)

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).