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Problem Display

PID: 214662 (8/8/3p2p1/K1kP1bN1/2p1rN2/4PP2/B7/6B1 w - - 0 1)

Klark, Dmitry Vasilevich

The Chess Player's Chronicle (Staunton), 1879

8/8/3p2p1/K1kP1bN1/2p1rN2/4PP2/B7/6B1

#2

8 + 6

6490	yacpdb	2020

SOLUTION

SOUND
Sets
- 1...Rxe3
  - 2.Bxe3#
- 1...Rd4
  - 2.exd4#
- 1...Rxf4
  - 2.e4#
- 1...Re5
  - 2.e4#
- 1...Re6
  - 2.e4#
- 1...Re7
  - 2.e4#
- 1...Re8
  - 2.e4#
- 1...Bh3
  - 2.Sxe4#
- 1...Bg4
  - 2.Sxe4#
- 1...Be6
  - 2.Sxe4#
- 1...Bd7
  - 2.Sxe4#
- 1...Bc8
  - 2.Sxe4#
- 1...c3
  - 2.Sd3#
Tries
- 1.Sge6+?
  - 1...Rxe6
    - 2.e4#
  - 1...Bxe6!
- 1.Bb1?
  - 1...Rxe3
    - 2.Bxe3#
  - 1...Rxf4
    - 2.e4#
  - 1...Bg4
    - 2.Sxe4#
  - 1...Rd4
    - 2.exd4#
  - 1...Re5
    - 2.e4#
  - 1...Re6
    - 2.e4#
  - 1...Re7
    - 2.e4#
  - 1...Re8
    - 2.e4#
  - 1...Bh3
    - 2.Sxe4#
  - 1...Be6
    - 2.Sxe4#
  - 1...Bd7
    - 2.Sxe4#
  - 1...Bc8
    - 2.Sxe4#
  - 1...c3!
- 1.Bb3?
  - 1...Rxe3
    - 2.Bxe3#
  - 1...Rxf4
    - 2.e4#
  - 1...Bg4
    - 2.Sxe4#
  - 1...Rd4
    - 2.exd4#
  - 1...Re5
    - 2.e4#
  - 1...Re6
    - 2.e4#
  - 1...Re7
    - 2.e4#
  - 1...Re8
    - 2.e4#
  - 1...Bh3
    - 2.Sxe4#
  - 1...Be6
    - 2.Sxe4#
  - 1...Bd7
    - 2.Sxe4#
  - 1...Bc8
    - 2.Sxe4#
  - 1...c3
    - 2.Sd3#
  - 1...cxb3!
Keys
- 1.Bf2!
  - 1...Rxe3
    - 2.Bxe3#
  - 1...Rxf4
    - 2.e4#
  - 1...Bg4
    - 2.Sxe4#
  - 1...Rd4
    - 2.exd4#
  - 1...Re5
    - 2.e4#
  - 1...Re6
    - 2.e4#
  - 1...Re7
    - 2.e4#
  - 1...Re8
    - 2.e4#
  - 1...Bh3
    - 2.Sxe4#
  - 1...Be6
    - 2.Sxe4#
  - 1...Bd7
    - 2.Sxe4#
  - 1...Bc8
    - 2.Sxe4#
  - 1...c3
    - 2.Sd3#

FEATURES

Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- R(b);OGATE,P_SPINR(b),XP(C)::B(A),XR(b)
- R(b);OGATE::P(C),XR(b)
- R(b);OGATE,XS(E)::B(A)+P(C)
- R(b);OGATE::B(A)+P(C)
- B(d);N_GUARD::S(H),XR(b)
- P(a);N_GUARD::S(E)
Tries
- Try
  - S(H);CHECK
  - Vars
    - R(b);OGATE,XS(H)::B(A)+P(C)
  - Refutation
    - B(d);XS(H)
- Try
  - B(B);
  - Vars
    - R(b);OGATE,P_SPINR(b),XP(C)::B(A),XR(b)
    - R(b);OGATE,XS(E)::B(A)+P(C)
    - B(d);N_GUARD::S(H),XR(b)
    - R(b);OGATE::P(C),XR(b)
    - R(b);OGATE::B(A)+P(C)
  - Refutation
    - P(a);
- Try
  - B(B);
  - Vars
    - R(b);OGATE,P_SPINR(b),XP(C)::B(A),XR(b)
    - R(b);OGATE,XS(E)::B(A)+P(C)
    - B(d);N_GUARD::S(H),XR(b)
    - R(b);OGATE::P(C),XR(b)
    - R(b);OGATE::B(A)+P(C)
    - P(a);N_GUARD::S(E)
  - Refutation
    - P(a);XB(B)
Actual
- B(A);
- Vars
  - R(b);OGATE,P_SPINR(b),XP(C)::B(A),XR(b)
  - R(b);OGATE,XS(E)::B(A)+P(C)
  - B(d);N_GUARD::S(H),XR(b)
  - R(b);OGATE::P(C),XR(b)
  - R(b);OGATE::B(A)+P(C)
  - P(a);N_GUARD::S(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).