Meson Chess Problem Database

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Problem Display

PID: 214692 (1rk5/1b3N2/p2B4/P1N4K/PQ4p1/1P2p3/3bP2n/3R4 w - - 0 1)

Klark, Dmitry Vasilevich

Vsemirnaya Illustrantiya, 1877

1rk5/1b3N2/p2B4/P1N4K/PQ4p1/1P2p3/3bP2n/3R4

#2

10 + 8

6490	yacpdb	2020

SOLUTION

SOUND
Sets
- 1...Ra8
  - 2.Qxb7#
- 1...Bh1
  - 2.Qxb8#
- 1...Bg2
  - 2.Qxb8#
- 1...Bf3
  - 2.Qxb8#
- 1...Be4
  - 2.Qxb8#
- 1...Bd5
  - 2.Qxb8#
- 1...Bc6
  - 2.Qxb8#
- 1...Ba8
  - 2.Qxb8#
- 1...Sf1
  - 2.Qxg4#
- 1...Sf3
  - 2.Qxg4#
Tries
- 1.Bxh2?
  - threat
    - 2.Qxg4#
  - 1...Bxb4
    - 2.Rd8#
  - 1...Bf3
    - 2.Qxb8#
  - 1...Be4
    - 2.Qxb8#
  - 1...Bd5
    - 2.Qxb8#
  - 1...Bc6
    - 2.Qxb8#
  - 1...g3!
- 1.Be5?
  - 1...Bxb4
    - 2.Rd8#
  - 1...Ra8
    - 2.Qxb7#
  - 1...Bc1
    - 2.Rd8#
  - 1...Be1
    - 2.Rd8#
  - 1...Bc3
    - 2.Rd8#
  - 1...Bh1
    - 2.Qxb8#
  - 1...Bg2
    - 2.Qxb8#
  - 1...Bf3
    - 2.Qxb8#
  - 1...Be4
    - 2.Qxb8#
  - 1...Bd5
    - 2.Qxb8#
  - 1...Bc6
    - 2.Qxb8#
  - 1...Ba8
    - 2.Qxb8#
  - 1...Sf1
    - 2.Qxg4#
  - 1...Sf3
    - 2.Qxg4#
  - 1...g3!
- 1.Qe4?
  - threat
    - 2.Qf5#
    - 2.Qe6#
    - 2.Qe8#
  - 1...Bxa5
    - 2.Qf5#
    - 2.Qe6#
  - 1...Bd5
    - 2.Qe8#
  - 1...Bc6
    - 2.Qxc6#
  - 1...Bxe4!
- 1.Qb5?
  - threat
    - 2.Qd7#
    - 2.Qe8#
  - 1...Bxa5
    - 2.Qd7#
  - 1...Bc6
    - 2.Qxc6#
    - 2.Qxb8#
  - 1...axb5!
Keys
- 1.Bg3!
  - 1...Bxb4
    - 2.Rd8#
  - 1...Ra8
    - 2.Qxb7#
  - 1...Bc1
    - 2.Rd8#
  - 1...Be1
    - 2.Rd8#
  - 1...Bc3
    - 2.Rd8#
  - 1...Bh1
    - 2.Qxb8#
  - 1...Bg2
    - 2.Qxb8#
  - 1...Bf3
    - 2.Qxb8#
  - 1...Be4
    - 2.Qxb8#
  - 1...Bd5
    - 2.Qxb8#
  - 1...Bc6
    - 2.Qxb8#
  - 1...Ba8
    - 2.Qxb8#
  - 1...Sf1
    - 2.Qxg4#
  - 1...Sf3
    - 2.Qxg4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
Sets
- R(g);N_GUARD::QAB1(E),XB(f)
- B(f);OGATE::QAR1(E),XR(g)
- S(b);N_GUARD::QAB(E),XP(d)
Tries
- Try
  - B(I);XS(b)
  - Threat
    - QAB(E),XP(d)
  - Vars
    - B(a);OGATE,XQ(E)::R1(A)
    - B(f);OGATE::QAR1(E),XR(g)
  - Refutation
    - P(d);
- Try
  - B(I);
  - Vars
    - B(a);OGATE,XQ(E)::R1(A)
    - R(g);N_GUARD::QAB1(E),XB(f)
    - B(a);OGATE::R1(A)
    - B(f);OGATE::QAR1(E),XR(g)
    - S(b);N_GUARD::QAB(E),XP(d)
  - Refutation
    - P(d);
- Try
  - Q(E);
  - Threat
    - DUALS(3)
  - Vars
    - B(f);::QAR2(E)
    - B(f);N_GUARD::QAR2(E),XB(f)
  - Refutation
    - B(f);XQ(E)
- Try
  - Q(E);
  - Threat
    - DUALS(2)
  - Vars
    - B(a);XP(F)::QAB1(E)
  - Refutation
    - P(e);XQ(E)
Actual
- B(I);
- Vars
  - B(a);OGATE,XQ(E)::R1(A)
  - R(g);N_GUARD::QAB1(E),XB(f)
  - B(a);OGATE::R1(A)
  - B(f);OGATE::QAR1(E),XR(g)
  - S(b);N_GUARD::QAB(E),XP(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).