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Problem Display

PID: 132135 (4BN2/1p5p/3pR3/3k1P2/1B1b4/1P6/K1Qn1r2/3R4 w - - 0 1)

Casa, Alex

Tijdschrift vd KNSB, 1952

4BN2/1p5p/3pR3/3k1P2/1B1b4/1P6/K1Qn1r2/3R4

#2

9 + 7

SOLUTION

SOUND
Sets
- 1...Ba1
  - 2.Qe4#
  - 2.Qc4#
- 1...Bb2
  - 2.Qe4#
  - 2.Qc4#
- 1...Bc3
  - 2.Qe4#
- 1...Be3
  - 2.Qe4#
  - 2.Qc4#
- 1...Bc5
  - 2.Qe4#
  - 2.Qc4#
- 1...Be5
  - 2.Qc4#
- 1...Bb6
  - 2.Qe4#
  - 2.Qc4#
- 1...Bf6
  - 2.Qe4#
  - 2.Qc4#
- 1...Ba7
  - 2.Qe4#
  - 2.Qc4#
- 1...Bg7
  - 2.Qe4#
  - 2.Qc4#
- 1...Bh8
  - 2.Qe4#
  - 2.Qc4#
- 1...Sc4
  - 2.bxc4#
- 1...b5
  - 2.Bc6#
  - 2.Qc6#
- 1...b6
  - 2.Bc6#
  - 2.Qc6#
Tries
- 1.Sg6?
  - threat
    - 2.Se7#
    - 2.Rxd6#
  - 1...Rxf5
    - 2.Rxd6#
  - 1...Ba1
    - 2.Rxd6#
    - 2.Qe4#
    - 2.Qc4#
  - 1...Bb2
    - 2.Rxd6#
    - 2.Qe4#
    - 2.Qc4#
  - 1...Bc3
    - 2.Rxd6#
    - 2.Qe4#
  - 1...Be3
    - 2.Rxd6#
    - 2.Qe4#
    - 2.Qc4#
  - 1...Bc5
    - 2.Qe4#
    - 2.Qc4#
  - 1...Be5
    - 2.Qc4#
  - 1...Bb6
    - 2.Rxd6#
    - 2.Qe4#
    - 2.Qc4#
  - 1...Bf6
    - 2.Rxd6#
    - 2.Qe4#
    - 2.Qc4#
  - 1...Ba7
    - 2.Rxd6#
    - 2.Qe4#
    - 2.Qc4#
  - 1...Bg7
    - 2.Rxd6#
    - 2.Qe4#
    - 2.Qc4#
  - 1...Bh8
    - 2.Rxd6#
    - 2.Qe4#
    - 2.Qc4#
  - 1...Sc4
    - 2.Se7#
    - 2.bxc4#
  - 1...Se4
    - 2.Se7#
  - 1...hxg6!
- 1.Rxd2?
  - threat
    - 2.Qe4#
    - 2.Qc4#
  - 1...Re2
    - 2.Qc4#
  - 1...Rf4
    - 2.Qc4#
  - 1...b5
    - 2.Bc6#
    - 2.Qe4#
    - 2.Qc6#
  - 1...Rxd2!
- 1.Re5+?
  - 1...Bxe5
    - 2.Qc4#
  - 1...dxe5
    - 2.Bf7#
  - 1...Kxe5!
Keys
- 1.Sd7!
  - threat
    - 2.Rxd6#
  - 1...Bc5
    - 2.Qe4#
  - 1...Be5
    - 2.Qc4#
  - 1...Sc4
    - 2.Sf6#
  - 1...Se4
    - 2.Sb6#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 1
Sets
- B(c);P_SPINS(a)::QAB1(C)
- S(a);OGATE,P_PINQ(C),P_SPINB(c)::P(D),XS(a)
Tries
- Try
  - S(I);
  - Threat
    - DUALS(2)
  - Vars
    - R(b);XP(F)::R1(G),XP(e)
    - B(c);P_SPINS(a)::QAB1(C)
    - S(a);P_PINQ(C),P_SPINB(c)::S(I)
  - Refutation
    - P(g);XS(I)
- Try
  - R(A);P_PINB(c),XS(a)
  - Threat
    - DUALS(2)
  - Vars
    - R(b);::QAB1(C)
  - Refutation
    - R(b);N_SPINB(c),P_PINQ(C),XR(A)
- Try
  - R(G);CHECK
  - Vars
    - B(c);P_SPINS(a),SBLOCK,XR(G)::QAB1(C)
    - P(e);SBLOCK,XR(G)::B(H)
  - Refutation
    - K(d);P-FLIGHT,XR(G)
Actual
- S(I);
- Threat
  - R1(G),XP(e)
- Vars
  - B(c);P_SPINS(a)::QAB1(C)
  - S(a);P_PINQ(C),P_SPINB(c)::S(I)

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).