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Problem Display

PID: 108508 (2n3B1/1R4N1/2pk4/3pr2b/3Q1n1q/K2p4/3p1r1B/8 w - - 0 1)

Jurka, Eriks

Latvian Championship, 1950

2n3B1/1R4N1/2pk4/3pr2b/3Q1n1q/K2p4/3p1r1B/8

#2

6 + 11

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...Re1
  - 2.Sf5#
- 1...Re2
  - 2.Sf5#
- 1...Re3
  - 2.Sf5#
- 1...Re4
  - 2.Sf5#
- 1...Rf5
  - 2.Sxf5#
- 1...Re6
  - 2.Sf5#
- 1...Re7
  - 2.Sf5#
- 1...Re8
  - 2.Sf5#
- 1...Se2
  - 2.Bxe5#
- 1...Sg2
  - 2.Bxe5#
- 1...Sh3
  - 2.Bxe5#
- 1...Se6
  - 2.Bxe5#
- 1...Sg6
  - 2.Se8#
Keys
- 1.Kb4!
  - threat
    - 2.Qc5#
  - 1...c5+
    - 2.Qxc5#
  - 1...Re1
    - 2.Sf5#
  - 1...Ree2
    - 2.Sf5#
  - 1...Re3
    - 2.Sf5#
  - 1...Re4
    - 2.Sf5#
  - 1...Rf5
    - 2.Sxf5#
  - 1...Rg5
    - 2.Qf6#
  - 1...Re6
    - 2.Sf5#
  - 1...Re7
    - 2.Sf5#
  - 1...Re8
    - 2.Sf5#
  - 1...Se2
    - 2.Bxe5#
  - 1...Sg2
    - 2.Bxe5#
  - 1...Sh3
    - 2.Bxe5#
  - 1...Se6
    - 2.Bxe5#
  - 1...Sg6
    - 2.Se8#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
- R(g);N_GUARD,P_SPINS(d)::S(E)
- R(g);N_GUARD,P_SPINS(d)::S(E),XR(g)
- S(d);OGATE,P_SPINR(g)::B(A),XR(g)
- S(d);P_SPINR(g),S_CUTB(h)::S(E)
Actual
- K(B);S_FLIGHT
- Threat
  - QAB1(C)
- Vars
  - P(i);CHECK::QAB1(C),XP(i)
  - R(g);N_GUARD,P_SPINS(d)::S(E)
  - R(g);N_GUARD,P_PINQ(C),P_SPINS(d)::S(E)
  - R(g);N_GUARD,P_SPINS(d)::S(E),XR(g)
  - R(g);OGATE,P_SPINS(d)::QAR2(C)
  - S(d);OGATE,P_PINQ(C),P_SPINR(g)::B(A),XR(g)
  - S(d);P_PINQ(C),P_SPINR(g),S_CUTB(h)::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).