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Problem Display

PID: 189932 (8/8/8/pR2p3/kB1bR3/1p6/4B3/1K6 w - - 0 1)

Popp, Richard

Alkotmany, 1912

8/8/8/pR2p3/kB1bR3/1p6/4B3/1K6

#2

5 + 5

6490	yacpdb	2019

SOLUTION

SOUND
Sets
- 1...Ba1
  - 2.Rxa5#
- 1...Bg1
  - 2.Rxa5#
- 1...Bb2
  - 2.Rxa5#
- 1...Bf2
  - 2.Rxa5#
- 1...Bc3
  - 2.Rxa5#
- 1...Be3
  - 2.Rxa5#
- 1...Bc5
  - 2.Bxc5#
  - 2.Rxa5#
- 1...Bb6
  - 2.Bc5#
- 1...Ba7
  - 2.Bc5#
  - 2.Rxa5#
Tries
- 1.Be1?
  - threat
    - 2.Rxa5#
  - 1...Ka3
    - 2.Rxa5#
  - 1...b2!
- 1.Bd2?
  - threat
    - 2.Rxa5#
  - 1...Ka3
    - 2.Rxa5#
  - 1...b2!
- 1.Bc3?
  - threat
    - 2.Rxa5#
  - 1...Ka3
    - 2.Rxa5#
  - 1...b2!
- 1.Rb7?
  - 1...b2
    - 2.Bd1#
  - 1...Ba1
    - 2.Bb5#
  - 1...Bg1
    - 2.Bb5#
  - 1...Bb2
    - 2.Bb5#
  - 1...Bf2
    - 2.Bb5#
  - 1...Bc3
    - 2.Bb5#
  - 1...Be3
    - 2.Bb5#
  - 1...Bc5
    - 2.Bb5#
    - 2.Bxc5#
  - 1...Bb6
    - 2.Bc5#
  - 1...Ba7
    - 2.Bb5#
    - 2.Bc5#
  - 1...axb4!
- 1.Rb8?
  - 1...b2
    - 2.Bd1#
  - 1...Ba1
    - 2.Bb5#
  - 1...Bg1
    - 2.Bb5#
  - 1...Bb2
    - 2.Bb5#
  - 1...Bf2
    - 2.Bb5#
  - 1...Bc3
    - 2.Bb5#
  - 1...Be3
    - 2.Bb5#
  - 1...Bc5
    - 2.Bb5#
    - 2.Bxc5#
  - 1...Bb6
    - 2.Bc5#
  - 1...Ba7
    - 2.Bb5#
    - 2.Bc5#
  - 1...axb4!
Keys
- 1.Rb6!
  - 1...Bxb6
    - 2.Bc5#
  - 1...axb4
    - 2.Ra6#
  - 1...b2
    - 2.Bd1#
  - 1...Ba1
    - 2.Bb5#
  - 1...Bg1
    - 2.Bb5#
  - 1...Bb2
    - 2.Bb5#
  - 1...Bf2
    - 2.Bb5#
  - 1...Bc3
    - 2.Bb5#
  - 1...Be3
    - 2.Bb5#
  - 1...Bc5
    - 2.Bb5#
    - 2.Bxc5#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 6
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
- B(c);::R1(E),XP(d)
- B(c);OGATEB::R(D)+B(C)
Tries
- Try
  - B(C);P_PINB(c)
  - Threat
    - R1(E),XP(d)
  - Vars
    - K(b);N_SPINB(c),P-FLIGHT::R(E),XP(d)
  - Refutation
    - P(a);
- Try
  - B(C);P_PINB(c)
  - Threat
    - R1(E),XP(d)
  - Vars
    - K(b);N_SPINB(c),P-FLIGHT::R(E),XP(d)
  - Refutation
    - P(a);
- Try
  - B(C);P_PINB(c)
  - Threat
    - R1(E),XP(d)
  - Vars
    - K(b);N_SPINB(c),P-FLIGHT::R(E),XP(d)
  - Refutation
    - P(a);
- Try
  - R(E);
  - Vars
    - P(a);OGATEB::B(B)
    - B(c);::B(B)
    - B(c);OGATEB::R(D)+B(C)
  - Refutation
    - P(d);XB(C)
- Try
  - R(E);
  - Vars
    - P(a);OGATEB::B(B)
    - B(c);::B(B)
    - B(c);OGATEB::R(D)+B(C)
  - Refutation
    - P(d);XB(C)
Actual
- R(E);
- Vars
  - B(c);OGATEB,XR(E)::R(D)+B(C)
  - P(d);OGATEB,SBLOCK,XB(C)::R(E)
  - P(a);OGATEB::B(B)
  - B(c);::B(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).