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Problem Display

PID: 88903 (8/2N5/8/2p2P2/2kb1R1K/1p6/1p2bN2/1B2B3 w - - 0 1)

Moutecidis, Pavlos

Sorokin, Evgeny Pavlovich

Buletin Problemistic, 1970

8/2N5/8/2p2P2/2kb1R1K/1p6/1p2bN2/1B2B3

#2

7 + 6

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...Bd1
  - 2.Bd3#
- 1...Bd3
  - 2.Bxd3#
- 1...Bf3
  - 2.Bd3#
- 1...Bg4
  - 2.Bd3#
- 1...Bh5
  - 2.Bd3#
Tries
- 1.Kg3?
  - 1...Bd1
    - 2.Bd3#
  - 1...Bd3
    - 2.Bxd3#
  - 1...Bf3
    - 2.Bd3#
  - 1...Bg4
    - 2.Bd3#
  - 1...Bh5
    - 2.Bd3#
  - 1...Bf1!
- 1.Kg5?
  - 1...Bd1
    - 2.Bd3#
  - 1...Bd3
    - 2.Bxd3#
  - 1...Bf3
    - 2.Bd3#
  - 1...Bg4
    - 2.Bd3#
  - 1...Bh5
    - 2.Bd3#
  - 1...Bf1!
- 1.Bd2?
  - 1...Bd1
    - 2.Bd3#
  - 1...Bd3
    - 2.Bxd3#
  - 1...Bf3
    - 2.Bd3#
  - 1...Bg4
    - 2.Bd3#
  - 1...Bh5
    - 2.Bd3#
  - 1...Bf1!
- 1.Ba5?
  - 1...Bd1
    - 2.Bd3#
  - 1...Bd3
    - 2.Bxd3#
  - 1...Bf3
    - 2.Bd3#
  - 1...Bg4
    - 2.Bd3#
  - 1...Bh5
    - 2.Bd3#
  - 1...Bf1!
- 1.Re4?
  - 1...Bd1
    - 2.Bd3#
  - 1...Bd3
    - 2.Bxd3#
  - 1...Bf3
    - 2.Bd3#
  - 1...Bg4
    - 2.Bd3#
  - 1...Bh5
    - 2.Bd3#
  - 1...Bf1!
- 1.Rg4?
  - 1...Bxg4
    - 2.Bd3#
  - 1...Bd1
    - 2.Bd3#
  - 1...Bd3
    - 2.Bxd3#
  - 1...Bf3
    - 2.Bd3#
  - 1...Bf1!
- 1.f6?
  - 1...Bd1
    - 2.Bd3#
  - 1...Bd3
    - 2.Bxd3#
  - 1...Bf3
    - 2.Bd3#
  - 1...Bg4
    - 2.Bd3#
  - 1...Bh5
    - 2.Bd3#
  - 1...Bf1!
Keys
- 1.Se4!
  - threat
    - 2.Sd6#
  - 1...Bf2+
    - 2.Sxf2#
  - 1...Bf6+
    - 2.Sxf6#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
Sets
- B(b);N_GUARD::B(A)
- B(b);N_GUARD::B(A),XB(b)
Tries
- Try
  - K(E);S_FLIGHT
  - Vars
    - B(b);N_GUARD::B(A)
    - B(b);N_GUARD::B(A),XB(b)
  - Refutation
    - B(b);
- Try
  - K(E);S_FLIGHT
  - Vars
    - B(b);N_GUARD::B(A)
    - B(b);N_GUARD::B(A),XB(b)
  - Refutation
    - B(b);
- Try
  - B(B);
  - Vars
    - B(b);N_GUARD::B(A)
    - B(b);N_GUARD::B(A),XB(b)
  - Refutation
    - B(b);
- Try
  - B(B);
  - Vars
    - B(b);N_GUARD::B(A)
    - B(b);N_GUARD::B(A),XB(b)
  - Refutation
    - B(b);
- Try
  - R(D);
  - Vars
    - B(b);N_GUARD::B(A)
    - B(b);N_GUARD::B(A),XB(b)
  - Refutation
    - B(b);
- Try
  - R(D);
  - Vars
    - B(b);N_GUARD,N_SPINB(e),XR(D)::B(A)
    - B(b);N_GUARD::B(A)
    - B(b);N_GUARD::B(A),XB(b)
  - Refutation
    - B(b);
- Try
  - P(F);
  - Vars
    - B(b);N_GUARD::B(A)
    - B(b);N_GUARD::B(A),XB(b)
  - Refutation
    - B(b);
Actual
- S(C);N_PINB(e)
- Threat
  - S(C)
- Vars
  - B(e);CHECK::R(D)+S(C),XB(e)

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).