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Problem Display

PID: 262170 (6k1/2K1BN2/3Np1BP/3p4/2p5/p7/Pb6/1R6 w - - 0 1)

Somma, Francesco

L'Italia Scacchistica, 1929

6k1/2K1BN2/3Np1BP/3p4/2p5/p7/Pb6/1R6

#2

8 + 6

15601	Albrecht-Leiss-Degener Collection	2022

SOLUTION

SOUND
Sets
- 1...Ba1
  - 2.Rb8#
- 1...Bc1
  - 2.Rb8#
- 1...Bc3
  - 2.Rb8#
- 1...Bd4
  - 2.Rb8#
- 1...Be5
  - 2.Rb8#
- 1...Bf6
  - 2.Rb8#
- 1...Bg7
  - 2.h7#
- 1...Bh8
  - 2.Rb8#
Tries
- 1.Bd3?
  - 1...Ba1
    - 2.Rb8#
  - 1...Bc1
    - 2.Rb8#
  - 1...Bc3
    - 2.Rb8#
  - 1...Bd4
    - 2.Rb8#
  - 1...Be5
    - 2.Rb8#
  - 1...Bf6
    - 2.Rb8#
  - 1...Bg7
    - 2.h7#
  - 1...Bh8
    - 2.Rb8#
  - 1...c3
    - 2.Rg1#
  - 1...d4
    - 2.Rg1#
  - 1...e5
    - 2.Rg1#
  - 1...cxd3!
- 1.Be4?
  - 1...Ba1
    - 2.Rb8#
  - 1...Bc1
    - 2.Rb8#
  - 1...Bc3
    - 2.Rb8#
  - 1...Bd4
    - 2.Rb8#
  - 1...Be5
    - 2.Rb8#
  - 1...Bf6
    - 2.Rb8#
  - 1...Bg7
    - 2.h7#
  - 1...Bh8
    - 2.Rb8#
  - 1...c3
    - 2.Rg1#
  - 1...d4
    - 2.Rg1#
  - 1...e5
    - 2.Rg1#
  - 1...dxe4!
- 1.Bf5?
  - 1...Ba1
    - 2.Rb8#
  - 1...Bc1
    - 2.Rb8#
  - 1...Bc3
    - 2.Rb8#
  - 1...Bd4
    - 2.Rb8#
  - 1...Be5
    - 2.Rb8#
  - 1...Bf6
    - 2.Rb8#
  - 1...Bg7
    - 2.h7#
  - 1...Bh8
    - 2.Rb8#
  - 1...c3
    - 2.Rg1#
  - 1...d4
    - 2.Rg1#
  - 1...e5
    - 2.Rg1#
  - 1...exf5!
Keys
- 1.Bc2!
  - 1...Ba1
    - 2.Rb8#
  - 1...Bc1
    - 2.Rb8#
  - 1...Bc3
    - 2.Rb8#
  - 1...Bd4
    - 2.Rb8#
  - 1...Be5
    - 2.Rb8#
  - 1...Bf6
    - 2.Rb8#
  - 1...Bg7
    - 2.h7#
  - 1...Bh8
    - 2.Rb8#
  - 1...c3
    - 2.Rg1#
  - 1...d4
    - 2.Rg1#
  - 1...e5
    - 2.Rg1#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
Sets
- B(a);OGATE::R(A)
- B(a);OGATE,P_PINS(C)::R(A)
- B(a);SBLOCK::P(E)
Tries
- Try
  - B(D);
  - Vars
    - B(a);OGATE::R(A)
    - B(a);OGATE,P_PINS(C)::R(A)
    - B(a);SBLOCK::P(E)
    - P(c);S_CUTB(a)::R(A)
    - P(d);S_CUTB(a)::R(A)
    - P(e);S_CUTB(a)::R(A)
  - Refutation
    - P(c);XB(D)
- Try
  - B(D);
  - Vars
    - B(a);OGATE::R(A)
    - B(a);OGATE,P_PINS(C)::R(A)
    - B(a);SBLOCK::P(E)
    - P(c);S_CUTB(a)::R(A)
    - P(d);S_CUTB(a)::R(A)
    - P(e);S_CUTB(a)::R(A)
  - Refutation
    - P(d);XB(D)
- Try
  - B(D);
  - Vars
    - B(a);OGATE::R(A)
    - B(a);OGATE,P_PINS(C)::R(A)
    - B(a);SBLOCK::P(E)
    - P(c);S_CUTB(a)::R(A)
    - P(d);S_CUTB(a)::R(A)
    - P(e);S_CUTB(a)::R(A)
  - Refutation
    - P(e);XB(D)
Actual
- B(D);
- Vars
  - B(a);OGATE::R(A)
  - B(a);OGATE,P_PINS(C)::R(A)
  - B(a);SBLOCK::P(E)
  - P(c);S_CUTB(a)::R(A)
  - P(d);S_CUTB(a)::R(A)
  - P(e);S_CUTB(a)::R(A)

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).