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Problem Display

PID: 274630 (8/8/8/2B5/8/1QPk1K2/3b2R1/8 w - - 0 1)

Tokar, Ivan Vasilovich

Mat, 1973

8/8/8/2B5/8/1QPk1K2/3b2R1/8

#2

5 + 2

SOLUTION

SOUND
Sets
- 1...Bc1
  - 2.c4#
- 1...Bxc3
  - 2.Qb5#
- 1...Be3
  - 2.c4#
- 1...Bf4
  - 2.c4#
- 1...Bg5
  - 2.c4#
- 1...Bh6
  - 2.c4#
Tries
- 1.Bb4?
  - 1...Bxc3
    - 2.Qxc3#
  - 1...Be1
    - 2.Qd5#
  - 1...Bc1
    - 2.Qd5#
  - 1...Bf4
    - 2.Qd5#
  - 1...Bg5
    - 2.Qd5#
  - 1...Bh6
    - 2.Qd5#
  - 1...Be3!
- 1.Bb6?
  - 1...Bxc3
    - 2.Qb5#
  - 1...Bc1
    - 2.c4#
  - 1...Be3
    - 2.c4#
  - 1...Bf4
    - 2.c4#
  - 1...Bg5
    - 2.c4#
  - 1...Bh6
    - 2.c4#
  - 1...Be1!
- 1.Ba7?
  - 1...Bxc3
    - 2.Qb5#
  - 1...Bc1
    - 2.c4#
  - 1...Be3
    - 2.c4#
  - 1...Bf4
    - 2.c4#
  - 1...Bg5
    - 2.c4#
  - 1...Bh6
    - 2.c4#
  - 1...Be1!
- 1.Re2?
  - 1...Bxc3
    - 2.Qb5#
  - 1...Bc1
    - 2.c4#
  - 1...Be3
    - 2.c4#
  - 1...Bf4
    - 2.c4#
  - 1...Bg5
    - 2.c4#
  - 1...Bh6
    - 2.c4#
  - 1...Be1!
- 1.Rf2?
  - 1...Bxc3
    - 2.Qb5#
  - 1...Bc1
    - 2.c4#
  - 1...Be3
    - 2.c4#
  - 1...Bf4
    - 2.c4#
  - 1...Bg5
    - 2.c4#
  - 1...Bh6
    - 2.c4#
  - 1...Be1!
- 1.Rh2?
  - 1...Bxc3
    - 2.Qb5#
  - 1...Bc1
    - 2.c4#
  - 1...Be3
    - 2.c4#
  - 1...Bf4
    - 2.c4#
  - 1...Bg5
    - 2.c4#
  - 1...Bh6
    - 2.c4#
  - 1...Be1!
Keys
- 1.Bd4!
  - 1...Bxc3
    - 2.Qxc3#
  - 1...Be1
    - 2.Qb5#
  - 1...Bc1
    - 2.Qb5#
  - 1...Be3
    - 2.Qb5#
  - 1...Bf4
    - 2.Qb5#
  - 1...Bg5
    - 2.Qb5#
  - 1...Bh6
    - 2.Qb5#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 6
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- B(a);N_GUARD::QAR(B)+P(C)
- B(a);P_SPINB(a),SBLOCK,XP(C)::QAB(B)
Tries
- Try
  - B(E);
  - Vars
    - B(a);OGATE,P_SPINB(a),XP(C)::QAR1(B),XB(a)
    - B(a);::QAR2(B)
  - Refutation
    - B(a);
- Try
  - B(E);
  - Vars
    - B(a);P_SPINB(a),SBLOCK,XP(C)::QAB(B)
    - B(a);N_GUARD::QAR(B)+P(C)
  - Refutation
    - B(a);
- Try
  - B(E);
  - Vars
    - B(a);P_SPINB(a),SBLOCK,XP(C)::QAB(B)
    - B(a);N_GUARD::QAR(B)+P(C)
  - Refutation
    - B(a);
- Try
  - R(A);
  - Vars
    - B(a);P_SPINB(a),SBLOCK,XP(C)::QAB(B)
    - B(a);N_GUARD::QAR(B)+P(C)
  - Refutation
    - B(a);
- Try
  - R(A);
  - Vars
    - B(a);P_SPINB(a),SBLOCK,XP(C)::QAB(B)
    - B(a);N_GUARD::QAR(B)+P(C)
  - Refutation
    - B(a);
- Try
  - R(A);
  - Vars
    - B(a);P_SPINB(a),SBLOCK,XP(C)::QAB(B)
    - B(a);N_GUARD::QAR(B)+P(C)
  - Refutation
    - B(a);
Actual
- B(E);
- Vars
  - B(a);OGATE,P_SPINB(a),XP(C)::QAR1(B),XB(a)
  - B(a);::QAB(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).