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Problem Display

PID: 161123 (4B3/2p3B1/K1P5/N1kpqP1Q/8/P1pP4/2P3P1/8 w - - 0 1)

Zalkind, Lazar Borissovich

Casopis ceskoslovenskych sachistu, 1908

4B3/2p3B1/K1P5/N1kpqP1Q/8/P1pP4/2P3P1/8

#2

11 + 5

15148	Sadier Collection	2017

SOLUTION

SOUND
Sets
- 1...Qh2
  - 2.Sb7#
- 1...Qg3
  - 2.Sb7#
- 1...Qd4
  - 2.Sb7#
  - 2.Bf8#
- 1...Qf4
  - 2.Sb7#
- 1...Qd6
  - 2.Sb3#
  - 2.Sb7#
  - 2.d4#
- 1...Qe1
  - 2.Sb7#
- 1...Qe2
  - 2.Sb7#
- 1...Qe3
  - 2.Sb7#
- 1...Qe4
  - 2.Sb7#
- 1...Qxf5
  - 2.Sb7#
- 1...Qe6
  - 2.Sb7#
- 1...Qe7
  - 2.Sb7#
Tries
- 1.Qg4?
  - threat
    - 2.Sb7#
    - 2.Qb4#
  - 1...Kd6
    - 2.Qb4#
  - 1...Qxe8
    - 2.Qb4#
  - 1...Qd4
    - 2.Sb7#
    - 2.Bf8#
  - 1...Qf4
    - 2.Sb7#
  - 1...Qe4
    - 2.Sb7#
  - 1...d4!
- 1.Qh4?
  - threat
    - 2.Sb7#
    - 2.Qb4#
  - 1...Kd6
    - 2.Sb7#
    - 2.Qb4#
  - 1...Qxe8
    - 2.Qb4#
  - 1...Qd4
    - 2.Sb7#
    - 2.Bf8#
    - 2.Qe7#
  - 1...Qf4
    - 2.Sb7#
  - 1...Qe4
    - 2.Sb7#
  - 1...d4!
Keys
- 1.Qh2!
  - 1...Kd4
    - 2.Qg1#
  - 1...Kd6
    - 2.Bf8#
  - 1...Qxh2
    - 2.Sb7#
  - 1...Qxg7
    - 2.Sb3#
  - 1...Qxf5
    - 2.Sb3#
    - 2.Sb7#
    - 2.d4#
  - 1...Qxe8
    - 2.d4#
  - 1...Qg3
    - 2.Sb7#
  - 1...Qd4
    - 2.Sb3#
    - 2.Sb7#
    - 2.Bf8#
  - 1...Qf4
    - 2.Sb7#
  - 1...Qd6
    - 2.Sb3#
    - 2.Sb7#
    - 2.d4#
  - 1...Qf6
    - 2.Sb3#
  - 1...Qe1
    - 2.Sb3#
    - 2.Sb7#
    - 2.d4#
  - 1...Qe2
    - 2.Sb3#
    - 2.Sb7#
  - 1...Qe3
    - 2.Sb3#
    - 2.Sb7#
  - 1...Qe4
    - 2.Sb3#
    - 2.Sb7#
  - 1...Qe6
    - 2.Sb3#
    - 2.Sb7#
    - 2.d4#
  - 1...Qe7
    - 2.Sb3#
    - 2.Sb7#
    - 2.d4#
  - 1...d4
    - 2.Qxe5#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 7
Sets
- Q(d);::S(E)
- Q(d);P_PINP(D)::S(E)
- Q(d);XP(F)::S(E)
- Q(d);P_PINP(I)::S(E)
Tries
- Try
  - Q(G);
  - Threat
    - DUALS(2)
  - Vars
    - K(b);S_FLIGHT::QAB(G)
    - Q(d);XB(K)::QAB1(G)
    - Q(d);::S(E)
  - Refutation
    - P(c);
- Try
  - Q(G);
  - Threat
    - DUALS(2)
  - Vars
    - Q(d);XB(K)::QAB1(G)
    - Q(d);::S(E)
  - Refutation
    - P(c);
Actual
- Q(G);
- Vars
  - K(b);P_SPINQ(d),S_FLIGHT::QAB(G)
  - K(b);P_SPINQ(d),S_FLIGHT::B(J)
  - Q(d);XQ(G)::S(E)
  - Q(d);XB(J)::S(E)
  - Q(d);N_GUARD,XB(K)::P(D)
  - Q(d);::S(E)
  - Q(d);P_PINP(I)::S(E)
  - P(c);OGATEB::QAR2(G),XQ(d)

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).