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Problem Display

PID: 62538 (1NBR1R2/1PQ3PK/1B6/4P3/2P1k1pp/8/4P1n1/1b4r1 w - - 0 1)

Bourd, Evgeny

Problemesis, 2003

1NBR1R2/1PQ3PK/1B6/4P3/2P1k1pp/8/4P1n1/1b4r1

#2

12 + 6

SOLUTION

SOUND
Sets
- 1...Bd3
  - 2.exd3#
- 1...Se3
  - 2.Rd4#
- 1...Sf4
  - 2.Bf5#
Tries
- 1.Sd7?
  - threat
    - 2.Qc6#
  - 1...Se3
    - 2.Sc5#
  - 1...Sf4
    - 2.Sf6#
  - 1...Rd1!
- 1.Bd4?
  - threat
    - 2.Qc6#
  - 1...Sf4
    - 2.Bf5#
  - 1...Se3!
- 1.Be6?
  - threat
    - 2.Bd5#
  - 1...Se3
    - 2.Rd4#
  - 1...Sf4
    - 2.Bf5#
  - 1...Rd1!
- 1.Rf2?
  - threat
    - 2.Bf5#
  - 1...Se3
    - 2.Rd4#
  - 1...Sf4!
- 1.Rf3?
  - threat
    - 2.Bf5#
    - 2.Rd4#
  - 1...Rd1
    - 2.Bf5#
  - 1...Se3
    - 2.Rd4#
  - 1...Sf4
    - 2.Re3#
    - 2.Rd4#
  - 1...gxf3!
- 1.Qd6?
  - threat
    - 2.Qd4#
    - 2.Qd5#
  - 1...Se3
    - 2.Qd4#
  - 1...Sf4
    - 2.Bf5#
    - 2.Qd4#
  - 1...Rd1!
- 1.Qc5?
  - threat
    - 2.Qd4#
    - 2.Qd5#
  - 1...Se3
    - 2.Rd4#
    - 2.Qxe3#
    - 2.Qd4#
  - 1...Sf4
    - 2.Bf5#
    - 2.Qe3#
    - 2.Qd4#
  - 1...Rd1!
- 1.Qd7?
  - threat
    - 2.Qf5#
    - 2.Qd4#
    - 2.Qd5#
  - 1...Rd1
    - 2.Qf5#
  - 1...Rf1
    - 2.Qd4#
    - 2.Qd5#
  - 1...Se3
    - 2.Qd4#
  - 1...Sf4
    - 2.Qf5#
    - 2.Qd4#
  - 1...Kxe5+!
- 1.Qf7?
  - threat
    - 2.Qd5#
    - 2.Qf5#
  - 1...Rd1
    - 2.Qf5#
  - 1...Rf1
    - 2.Qd5#
  - 1...Se3
    - 2.Qf4#
  - 1...Sf4
    - 2.Qxf4#
    - 2.Qf5#
  - 1...Kxe5+!
- 1.g8B?
  - threat
    - 2.Bd5#
  - 1...Se3
    - 2.Rd4#
  - 1...Sf4
    - 2.Bf5#
  - 1...Rd1!
Keys
- 1.g8Q!
  - threat
    - 2.Qd5#
    - 2.Qg6#
  - 1...Rd1
    - 2.Qg6#
  - 1...Rf1
    - 2.Qd5#
  - 1...Se3
    - 2.Rd4#
  - 1...Sf4
    - 2.Bf5#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
Sets
- B(a);OGATE::P(A),XB(a)
- S(c);SBLOCK::R1(K)
- S(c);SBLOCK::B(J)
Tries
- Try
  - S(I);
  - Threat
    - QAB(F)
  - Vars
    - S(c);SBLOCK::S(I)
  - Refutation
    - R(b);
- Try
  - B(D);
  - Threat
    - QAB(F)
  - Vars
    - S(c);SBLOCK::B(J)
  - Refutation
    - S(c);
- Try
  - B(J);
  - Threat
    - B(J)
  - Vars
    - S(c);SBLOCK::R1(K)
    - S(c);SBLOCK::B(J)
  - Refutation
    - R(b);
- Try
  - R(L);
  - Threat
    - B(J)
  - Vars
    - S(c);SBLOCK::R1(K)
  - Refutation
    - S(c);
- Try
  - R(L);
  - Threat
    - DUALS(2)
  - Vars
    - R(b);::B(J)
    - S(c);::R1(K)
  - Refutation
    - P(e);XR(L)
- Try
  - Q(F);
  - Threat
    - DUALS(2)
  - Vars
    - S(c);::QAR1(F)
  - Refutation
    - R(b);
- Try
  - Q(F);
  - Threat
    - DUALS(2)
  - Refutation
    - R(b);
- Try
  - Q(F);
  - Threat
    - DUALS(3)
  - Vars
    - R(b);::QAB1(F)
    - S(c);::QAR1(F)
  - Refutation
    - K(d);CHECK,P-FLIGHT,XP(C)
- Try
  - Q(F);
  - Threat
    - DUALS(2)
  - Vars
    - R(b);::QAB1(F)
    - S(c);N_GUARD::QAR1(F)
  - Refutation
    - K(d);CHECK,P-FLIGHT,XP(C)
- Try
  - P(G);
  - Threat
    - B(G)
  - Vars
    - S(c);SBLOCK::R1(K)
    - S(c);SBLOCK::B(J)
  - Refutation
    - R(b);
Actual
- P(G);
- Threat
  - DUALS(2)
- Vars
  - R(b);::QAB(G)
  - R(b);::QAB1(G)
  - S(c);SBLOCK::R1(K)
  - S(c);SBLOCK::B(J)

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).