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Problem Display

PID: 241920 (N7/P7/K1k5/6bR/3Q4/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

N7/P7/K1k5/6bR/3Q4/8/8/8

#2

5 + 2

15148	Sadier Collection	2021

SOLUTION

SOUND
Sets
- 1...Bc1
  - 2.Rc5#
  - 2.Qd5#
- 1...Bd2
  - 2.Rc5#
  - 2.Qd5#
- 1...Be3
  - 2.Rc5#
  - 2.Qd5#
- 1...Bf4
  - 2.Rc5#
  - 2.Qd5#
- 1...Bh4
  - 2.Rc5#
  - 2.Qd5#
- 1...Bf6
  - 2.Rc5#
  - 2.Qd5#
- 1...Bh6
  - 2.Rc5#
  - 2.Rxh6#
  - 2.Qd5#
- 1...Be7
  - 2.Qd5#
- 1...Bd8
  - 2.Rc5#
  - 2.Qd5#
Tries
- 1.Rh6+?
  - 1...Bf6
    - 2.Rxf6#
  - 1...Bxh6!
- 1.Qe5?
  - 1...Be7
    - 2.Qc7#
    - 2.Qd5#
  - 1...Bc1
    - 2.Qc7#
    - 2.Qd5#
    - 2.Qe6#
  - 1...Bd2
    - 2.Qc7#
    - 2.Qd5#
    - 2.Qe6#
  - 1...Be3
    - 2.Qc7#
    - 2.Qd5#
    - 2.Qe6#
  - 1...Bf4
    - 2.Qd5#
  - 1...Bh4
    - 2.Qc7#
    - 2.Qd5#
    - 2.Qe6#
  - 1...Bf6
    - 2.Qc7#
    - 2.Qd5#
    - 2.Qe6#
  - 1...Bh6
    - 2.Qc7#
    - 2.Qd5#
    - 2.Qe6#
  - 1...Bd8
    - 2.Qd5#
    - 2.Qe6#
  - 1...Kd7!
- 1.Qd3?
  - 1...Be7
    - 2.Qd5#
  - 1...Bc1
    - 2.Qd5#
  - 1...Bd2
    - 2.Qd5#
  - 1...Be3
    - 2.Qd5#
  - 1...Bf4
    - 2.Qd5#
  - 1...Bh4
    - 2.Qd5#
  - 1...Bf6
    - 2.Qd5#
  - 1...Bh6
    - 2.Qd5#
  - 1...Bd8
    - 2.Qd5#
  - 1...Kc5!
Keys
- 1.Sb6!
  - 1...Kc7
    - 2.Qd7#
  - 1...Bc1
    - 2.Rc5#
    - 2.Qc5#
    - 2.Qd7#
  - 1...Bd2
    - 2.Rc5#
    - 2.Qc5#
    - 2.Qd7#
  - 1...Be3
    - 2.Rc5#
    - 2.Qd7#
  - 1...Bf4
    - 2.Rc5#
    - 2.Qc5#
    - 2.Qd7#
  - 1...Bh4
    - 2.Rc5#
    - 2.Qc5#
    - 2.Qd7#
  - 1...Bf6
    - 2.Rc5#
    - 2.Qc5#
    - 2.Qd7#
  - 1...Bh6
    - 2.Rc5#
    - 2.Qc5#
    - 2.Qd7#
  - 1...Be7
    - 2.Qd7#
  - 1...Bd8
    - 2.Rc5#
    - 2.Qc5#
    - 2.Qd7#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- B(a);::QAB1(A)
Tries
- Try
  - R(B);CHECK
  - Vars
    - B(a);N_GUARD,P_SPINB(a)::R(B),XB(a)
  - Refutation
    - B(a);XR(B)
- Try
  - Q(A);
  - Vars
    - B(a);::QAB1(A)
  - Refutation
    - K(b);S_FLIGHT
- Try
  - Q(A);
  - Vars
    - B(a);::QAB1(A)
  - Refutation
    - K(b);P-FLIGHT,P_SPINB(a)
Actual
- S(E);
- Vars
  - K(b);P-FLIGHT::QAR1(A)
  - B(a);::QAB1(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).