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Problem Display

PID: 174757 (1K6/2P1P3/1NN3pR/PkP3pR/6PP/7B/4P3/6BQ w - - 0 1)

Zajic, Helmut

Die Schwalbe, 1988

1K6/2P1P3/1NN3pR/PkP3pR/6PP/7B/4P3/6BQ

#2

15 + 3

6490	yacpdb	2018

SOLUTION

SOUND
Tries
- 1.Qf3?
  - 1...Ka6
    - 2.Qd3#
  - 1...gxh5
    - 2.Qd3#
  - 1...gxh4!
- 1.Qe4?
  - 1...Ka6
    - 2.Qd3#
    - 2.Qc4#
  - 1...gxh5
    - 2.Qd3#
    - 2.Qc4#
  - 1...gxh4!
- 1.Qd5?
  - 1...Ka6
    - 2.Qc4#
    - 2.Qd3#
  - 1...gxh5
    - 2.Qc4#
    - 2.Qd3#
  - 1...gxh4!
- 1.e3?
  - 1...Kxc5
    - 2.Qd5#
  - 1...Ka6
    - 2.Bf1#
  - 1...gxh4
    - 2.Bf1#
  - 1...gxh5!
- 1.e4?
  - 1...Ka6
    - 2.Bf1#
  - 1...Kxc6
    - 2.e8Q#
    - 2.e8B#
  - 1...gxh5
    - 2.Bf1#
  - 1...gxh4!
Keys
- 1.Bf1!
  - 1...Ka6
    - 2.e3#
    - 2.e4#
  - 1...gxh4
    - 2.e3#
  - 1...gxh5
    - 2.e4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
Tries
- Try
  - Q(B);
  - Vars
    - K(a);S_FLIGHT::QAB(B)
    - P(c);XR(I)::QAB(B)
  - Refutation
    - P(b);XP(F)
- Try
  - Q(B);
  - Refutation
    - P(b);XP(F)
- Try
  - Q(B);
  - Refutation
    - P(b);XP(F)
- Try
  - P(C);
  - Vars
    - K(a);OGATEB,P-FLIGHT,P_SPINP(b),XP(H)::QAR1(B)
    - K(a);S_FLIGHT::B(D)
    - P(b);XP(F)::B(D)
  - Refutation
    - P(c);XR(I)
- Try
  - P(C);
  - Vars
    - K(a);S_FLIGHT::B(D)
    - K(a);P_SPINP(c),S_FLIGHT,XS(K)::P=Q
    - P(c);XR(I)::B(D)
  - Refutation
    - P(b);XP(F)
Actual
- B(D);
- Vars
  - P(b);XP(F)::B(D)+P(C)
  - P(c);XR(I)::B(D)+P(C)

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).