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Problem Display

PID: 35618 (8/1p3B2/1Rb5/1p6/pP3P1k/K1Q3rr/4p2N/4B1n1 w - - 0 1)

Knoppel, Jan Heribert

Prize, Eskilstuna Kuriren Elmgren 1. TT, 1949

8/1p3B2/1Rb5/1p6/pP3P1k/K1Q3rr/4p2N/4B1n1

#2

8 + 9

3680	Jan Knoppel Udvalgte Skakproblemer	1955

SOLUTION

SOUND
Sets
- 1...Rxh2
  - 2.Qxg3#
- 1...Bh1
  - 2.Rh6#
- 1...Bg2
  - 2.Rh6#
- 1...Bf3
  - 2.Qf6#
- 1...Be4
  - 2.Rh6#
- 1...Bd5
  - 2.Rh6#
- 1...Bd7
  - 2.Rh6#
- 1...Be8
  - 2.Rh6#
- 1...Sf3
  - 2.Qh8#
Tries
- 1.Ka2?
  - threat
    - 2.Qf6#
    - 2.Qh8#
  - 1...Rxh2
    - 2.Qxg3#
  - 1...Bf3
    - 2.Qf6#
  - 1...Be4
    - 2.Rh6#
    - 2.Qf6#
  - 1...Sf3
    - 2.Qh8#
  - 1...Bd5+!
- 1.Kb2?
  - threat
    - 2.Qf6#
    - 2.Qh8#
  - 1...Rxh2
    - 2.Qxg3#
  - 1...Bf3
    - 2.Qf6#
  - 1...Be4
    - 2.Rh6#
    - 2.Qf6#
  - 1...Sf3
    - 2.Qh8#
  - 1...a3+!
- 1.Be8?
  - 1...Rxh2
    - 2.Qxg3#
  - 1...Bh1
    - 2.Rh6#
  - 1...Bg2
    - 2.Rh6#
  - 1...Bf3
    - 2.Qf6#
  - 1...Be4
    - 2.Rh6#
  - 1...Bd5
    - 2.Rh6#
  - 1...Bd7
    - 2.Rh6#
  - 1...Sf3
    - 2.Qh8#
  - 1...Bxe8!
- 1.Rxc6?
  - threat
    - 2.Rh6#
  - 1...Rxh2
    - 2.Qxg3#
  - 1...bxc6!
- 1.Qe3?
  - 1...Rxh2
    - 2.Qxg3#
  - 1...Bh1
    - 2.Rh6#
  - 1...Bg2
    - 2.Rh6#
  - 1...Bf3
    - 2.Qe7#
  - 1...Be4
    - 2.Rh6#
  - 1...Bd5
    - 2.Rh6#
  - 1...Bd7
    - 2.Rh6#
  - 1...Be8
    - 2.Rh6#
  - 1...Sf3!
Keys
- 1.Qd3!
  - 1...Rxh2
    - 2.Qxg3#
  - 1...Bh1
    - 2.Rh6#
  - 1...Bg2
    - 2.Rh6#
  - 1...Bf3
    - 2.Qd8#
  - 1...Be4
    - 2.Rh6#
  - 1...Bd5
    - 2.Rh6#
  - 1...Bd7
    - 2.Rh6#
  - 1...Be8
    - 2.Rh6#
  - 1...Sf3
    - 2.Qh7#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- R(d);N_GUARD,XS(B)::QAB1(D),XR(c)
- B(h);OGATE::R(G)
- B(h);N_PINQ(D)::QAB(D)
- S(a);N_PINQ(D)::QAR(D)
Tries
- Try
  - K(C);N_SPINQ(D),P-FLIGHT
  - Threat
    - DUALS(2)
  - Vars
    - R(d);N_GUARD,XS(B)::QAB1(D),XR(c)
    - B(h);::QAB(D)
    - S(a);::QAR(D)
  - Refutation
    - B(h);CHECK
- Try
  - K(C);N_SPINQ(D),S_FLIGHT
  - Threat
    - DUALS(2)
  - Vars
    - R(d);N_GUARD,XS(B)::QAB1(D),XR(c)
    - B(h);::QAB(D)
    - S(a);::QAR(D)
  - Refutation
    - P(e);CHECK
- Try
  - B(H);
  - Vars
    - R(d);N_GUARD,XS(B)::QAB1(D),XR(c)
    - B(h);OGATE::R(G)
    - B(h);N_PINQ(D)::QAB(D)
    - S(a);N_PINQ(D)::QAR(D)
  - Refutation
    - B(h);XB(H)
- Try
  - R(G);XB(h)
  - Threat
    - R(G)
  - Vars
    - R(d);N_GUARD,XS(B)::QAB1(D),XR(c)
  - Refutation
    - P(i);XR(G)
- Try
  - Q(D);
  - Vars
    - R(d);N_GUARD,XS(B)::QAB1(D),XR(c)
    - B(h);OGATE::R(G)
    - B(h);N_PINQ(D)::QAB(D)
  - Refutation
    - S(a);N_PINQ(D)
Actual
- Q(D);
- Vars
  - R(d);N_GUARD,XS(B)::QAB1(D),XR(c)
  - B(h);OGATE::R(G)
  - B(h);N_PINQ(D)::QAB(D)
  - S(a);N_PINQ(D)::QAR(D)

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).