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Problem Display

PID: 24602 (6BK/8/4p1k1/4Rb2/7Q/8/8/8 w - - 0 1)

Schonberger, Tibor

2nd Prize, Le Soleil de Marseille, 1925

6BK/8/4p1k1/4Rb2/7Q/8/8/8

#2

4 + 3

3713	Snap	2007

SOLUTION

SOUND
Sets
- 1...Bb1
  - 2.Qg5#
- 1...Bc2
  - 2.Qg5#
- 1...Bd3
  - 2.Qg5#
- 1...Bh3
  - 2.Qg5#
- 1...Be4
  - 2.Qg5#
- 1...Bg4
  - 2.Qg5#
Tries
- 1.Bxe6?
  - 1...Bb1
    - 2.Qg5#
  - 1...Bc2
    - 2.Qg5#
  - 1...Bd3
    - 2.Qg5#
  - 1...Bh3
    - 2.Qg5#
  - 1...Be4
    - 2.Qg5#
  - 1...Bg4
    - 2.Qg5#
  - 1...Bxe6!
- 1.Ra5?
  - 1...Bb1
    - 2.Qg5#
  - 1...Bc2
    - 2.Qg5#
  - 1...Bd3
    - 2.Qg5#
  - 1...Bh3
    - 2.Qg5#
  - 1...Be4
    - 2.Qg5#
  - 1...Bg4
    - 2.Qg5#
  - 1...e5!
- 1.Rb5?
  - 1...Bb1
    - 2.Qg5#
  - 1...Bc2
    - 2.Qg5#
  - 1...Bd3
    - 2.Qg5#
  - 1...Bh3
    - 2.Qg5#
  - 1...Be4
    - 2.Qg5#
  - 1...Bg4
    - 2.Qg5#
  - 1...e5!
- 1.Rc5?
  - 1...Bb1
    - 2.Qg5#
  - 1...Bc2
    - 2.Qg5#
  - 1...Bd3
    - 2.Qg5#
  - 1...Bh3
    - 2.Qg5#
  - 1...Be4
    - 2.Qg5#
  - 1...Bg4
    - 2.Qg5#
  - 1...e5!
- 1.Qh7+?
  - 1...Kf6
    - 2.Qg7#
  - 1...Kg5!
Keys
- 1.Qf4!
  - 1...Kh5
    - 2.Bf7#
  - 1...Kf6
    - 2.Rxe6#
  - 1...Bb1
    - 2.Bf7#
    - 2.Bh7#
    - 2.Qg5#
  - 1...Bc2
    - 2.Bf7#
    - 2.Bh7#
    - 2.Qg5#
  - 1...Bd3
    - 2.Bf7#
    - 2.Bh7#
    - 2.Qg5#
  - 1...Bh3
    - 2.Bf7#
    - 2.Bh7#
    - 2.Qg5#
  - 1...Be4
    - 2.Bf7#
    - 2.Bh7#
    - 2.Qg5#
  - 1...Bg4
    - 2.Bf7#
    - 2.Bh7#
    - 2.Qg5#

This anticipates 17215(1925-1926)

FEATURES

Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
Sets
- B(a);::QAR1(A)
Tries
- Try
  - B(C);XP(b)
  - Vars
    - B(a);::QAR1(A)
  - Refutation
    - B(a);XB(C)
- Try
  - R(B);
  - Vars
    - B(a);::QAR1(A)
  - Refutation
    - P(b);
- Try
  - R(B);
  - Vars
    - B(a);::QAR1(A)
  - Refutation
    - P(b);
- Try
  - R(B);
  - Vars
    - B(a);::QAR1(A)
  - Refutation
    - P(b);
- Try
  - Q(A);CHECK
  - Vars
    - K(c);P-FLIGHT::QAB1(A)
  - Refutation
    - K(c);P-FLIGHT,P_SPINB(a)
Actual
- Q(A);
- Vars
  - K(c);P_SPINB(a),S_FLIGHT::B(C)
  - K(c);P-FLIGHT,P_SPINB(a)::R1(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).