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Problem Display

PID: 20887 (7Q/3R4/4p3/b3Npp1/pr2k3/4BNPn/b2P4/1n2K3 w - - 0 1)

Cooper, Arthur Richard

Hampshire Post, 1913

7Q/3R4/4p3/b3Npp1/pr2k3/4BNPn/b2P4/1n2K3

#2

8 + 10

3360	Simple Two-move Themes	1924

SOLUTION

SOUND
Sets
- 1...Rb2
  - 2.Rd4#
- 1...Rb3
  - 2.Rd4#
- 1...Rd4
  - 2.Rxd4#
- 1...Rb5
  - 2.Rd4#
- 1...Rb6
  - 2.Rd4#
- 1...Rb7
  - 2.Rd4#
- 1...Rb8
  - 2.Rd4#
- 1...Bc4
  - 2.Rd4#
- 1...Sg1
  - 2.Sxg5#
- 1...Sf2
  - 2.Sxg5#
- 1...Sf4
  - 2.Sxg5#
- 1...f4
  - 2.Qh7#
Tries
- 1.Bg1?
  - threat
    - 2.d3#
  - 1...Sxd2
    - 2.Sxd2#
  - 1...Sxg1
    - 2.Sxg5#
  - 1...f4
    - 2.Qh7#
  - 1...Rb2
    - 2.Rd4#
  - 1...Rb3
    - 2.Rd4#
  - 1...Rd4
    - 2.Rxd4#
  - 1...Rb5
    - 2.Rd4#
  - 1...Rb6
    - 2.Rd4#
  - 1...Rb7
    - 2.Rd4#
  - 1...Rb8
    - 2.Rd4#
  - 1...Bc4
    - 2.Rd4#
  - 1...Sf2
    - 2.Sxg5#
  - 1...Sf4
    - 2.Sxg5#
  - 1...Rc4!
- 1.Bf2?
  - threat
    - 2.d3#
  - 1...Sxd2
    - 2.Sxd2#
  - 1...Sxf2
    - 2.Sxg5#
  - 1...f4
    - 2.Qh7#
  - 1...Rb2
    - 2.Rd4#
  - 1...Rb3
    - 2.Rd4#
  - 1...Rd4
    - 2.Rxd4#
  - 1...Rb5
    - 2.Rd4#
  - 1...Rb6
    - 2.Rd4#
  - 1...Rb7
    - 2.Rd4#
  - 1...Rb8
    - 2.Rd4#
  - 1...Bc4
    - 2.Rd4#
  - 1...Sf4
    - 2.Sxg5#
  - 1...Rc4!
- 1.Qa8+?
  - 1...Rb7
    - 2.Rd4#
  - 1...Bd5!
Keys
- 1.Bc5!
  - threat
    - 2.d3#
  - 1...Sxd2
    - 2.Sxd2#
  - 1...f4
    - 2.Qh7#
  - 1...Rc4
    - 2.Qa8#
  - 1...Rb2
    - 2.Rd4#
  - 1...Rb3
    - 2.Rd4#
  - 1...Rd4
    - 2.Rxd4#
  - 1...Rb5
    - 2.Rd4#
  - 1...Rb6
    - 2.Rd4#
  - 1...Rb7
    - 2.Rd4#
  - 1...Rb8
    - 2.Rd4#
  - 1...Bc4
    - 2.Rd4#
  - 1...Sf2
    - 2.Sxg5#
  - 1...Sf4
    - 2.Sxg5#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
Sets
- R(e);N_GUARD,P_PINP(B)::R1(G)
- R(e);N_GUARD,P_PINP(B)::R1(G),XR(e)
- B(b);S_CUTR(e)::R1(G)
- S(c);N_GUARD::S(D),XP(i)
- P(h);OGATEB::QAB(H)
Tries
- Try
  - B(C);
  - Threat
    - P(B)
  - Vars
    - S(a);XP(B)::S(D),XS(a)
    - S(c);N_GUARD,XB(C)::S(D),XP(i)
    - P(h);OGATEB::QAB(H)
    - R(e);N_GUARD,P_PINP(B)::R1(G)
    - R(e);N_GUARD,P_PINP(B)::R1(G),XR(e)
    - B(b);S_CUTR(e)::R1(G)
    - S(c);N_GUARD::S(D),XP(i)
  - Refutation
    - R(e);P_PINP(B)
- Try
  - B(C);
  - Threat
    - P(B)
  - Vars
    - S(a);XP(B)::S(D),XS(a)
    - S(c);N_GUARD,XB(C)::S(D),XP(i)
    - P(h);OGATEB::QAB(H)
    - R(e);N_GUARD,P_PINP(B)::R1(G)
    - R(e);N_GUARD,P_PINP(B)::R1(G),XR(e)
    - B(b);S_CUTR(e)::R1(G)
    - S(c);N_GUARD::S(D),XP(i)
  - Refutation
    - R(e);P_PINP(B)
- Try
  - Q(H);CHECK
  - Vars
    - R(e);P_PINP(B),P_SPINR(e)::R1(G)
  - Refutation
    - B(b);P_SPINB(b)
Actual
- B(C);
- Threat
  - P(B)
- Vars
  - S(a);XP(B)::S(D),XS(a)
  - P(h);OGATEB::QAB(H)
  - R(e);N_GUARD,P_PINP(B),S_CUTB(b)::QAB(H)
  - R(e);N_GUARD,P_PINP(B)::R1(G)
  - R(e);N_GUARD,P_PINP(B)::R1(G),XR(e)
  - B(b);S_CUTR(e)::R1(G)
  - S(c);N_GUARD::S(D),XP(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).