Meson Chess Problem Database

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Problem Display

PID: 49430 (8/P2Q2N1/5PpK/2B5/2p1kP1p/5p1B/pq6/nb3N2 w - - 0 1)

Gold, Samuel

Source?, 0000

8/P2Q2N1/5PpK/2B5/2p1kP1p/5p1B/pq6/nb3N2

#2

9 + 9

5166	200 Schachaufgaben	1883

SOLUTION

SOUND
Sets
- 1...Qc1
  - 2.Qd4#
- 1...Qa3
  - 2.Qd4#
- 1...Qd4
  - 2.Qxd4#
- 1...Qc2
  - 2.Qd4#
- 1...Qe2
  - 2.Qd4#
- 1...Qg2
  - 2.Qd4#
- 1...Qh2
  - 2.Qd4#
- 1...Qb3
  - 2.Qd4#
- 1...Qb4
  - 2.Qd4#
- 1...Qb5
  - 2.Qd4#
- 1...Qb6
  - 2.Qd4#
- 1...Qb7
  - 2.Qd4#
- 1...Qb8
  - 2.Qd4#
- 1...c3
  - 2.Qd4#
- 1...g5
  - 2.Qf5#
Tries
- 1.Bf5+?
  - 1...gxf5
    - 2.Qxf5#
  - 1...Kxf4!
- 1.Qd5+?
  - 1...Kxf4
    - 2.Se6#
    - 2.Be3#
  - 1...Kxd5!
- 1.a8Q+?
  - 1...Qb7
    - 2.Qd4#
  - 1...Kxf4!
- 1.a8B+?
  - 1...Qb7
    - 2.Qd4#
  - 1...Kxf4!
Keys
- 1.Sh5!
  - 1...Qxf6
    - 2.Sd2#
  - 1...gxh5
    - 2.Qf5#
  - 1...Qd4
    - 2.Qxd4#
  - 1...f2
    - 2.Bg2#
  - 1...Qc1
    - 2.Qd4#
    - 2.a8Q#
    - 2.a8B#
  - 1...Qa3
    - 2.Sd2#
    - 2.Qd4#
  - 1...Qc3
    - 2.a8Q#
    - 2.a8B#
  - 1...Qe5
    - 2.Sd2#
  - 1...Qc2
    - 2.Qd4#
    - 2.a8Q#
    - 2.a8B#
  - 1...Qd2
    - 2.Sxd2#
  - 1...Qe2
    - 2.Qd4#
    - 2.a8Q#
    - 2.a8B#
  - 1...Qf2
    - 2.a8Q#
    - 2.a8B#
  - 1...Qg2
    - 2.Qd4#
    - 2.a8Q#
    - 2.a8B#
  - 1...Qh2
    - 2.Qd4#
    - 2.a8Q#
    - 2.a8B#
  - 1...Qb3
    - 2.Sd2#
    - 2.Qd4#
  - 1...Qb4
    - 2.Qd4#
  - 1...Qb5
    - 2.Sd2#
    - 2.Qd4#
  - 1...Qb6
    - 2.Sd2#
    - 2.Qd4#
  - 1...Qb7
    - 2.Sd2#
    - 2.Qd4#
  - 1...Qb8
    - 2.Sd2#
    - 2.Qd4#
  - 1...Bc2
    - 2.Sd2#
  - 1...Bd3
    - 2.Qc6#
  - 1...Sc2
    - 2.Sd2#
  - 1...Sb3
    - 2.a8Q#
    - 2.a8B#
  - 1...c3
    - 2.Qd4#
  - 1...g5
    - 2.Bf5#
    - 2.Qf5#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 12
Sets
- Q(d);N_GUARD,P_PINP(C)::QAR1(H)
- Q(d);N_GUARD::QAR1(H)
- Q(d);N_GUARD::QAR1(H),XQ(d)
- P(f);S_CUTQ(d)::QAR1(H)
- P(i);N_GUARD::QAB1(H)
Tries
- Try
  - B(B);CHECK
  - Vars
    - P(i);OGATE,XB(B)::QAB1(H),XP(i)
  - Refutation
    - K(g);P-FLIGHT,XP(C)
- Try
  - Q(H);CHECK
  - Refutation
    - K(g);S_FLIGHT,XQ(H)
- Try
  - P(G);CHECK
  - Vars
    - Q(d);P_SPINQ(d)::QAR1(H)
  - Refutation
    - K(g);P-FLIGHT,XP(C)
- Try
  - P(G);CHECK
  - Vars
    - Q(d);P_SPINQ(d)::QAR1(H)
  - Refutation
    - K(g);P-FLIGHT,XP(C)
Actual
- S(I);
- Vars
  - Q(d);N_GUARD,XP(E)::S(A)
  - P(i);N_GUARD,XS(I)::QAB1(H)
  - Q(d);N_GUARD::QAR1(H),XQ(d)
  - P(e);OGATEB::B(B)
  - Q(d);N_GUARD::P=Q
  - Q(d);N_GUARD::S(A)
  - Q(d);N_GUARD,P_PINP(C)::S(A),XQ(d)
  - Q(d);N_GUARD::QAR1(H)
  - B(b);S_CUTQ(d)::S(A)
  - B(b);SBLOCK::QAB(H)
  - S(a);S_CUTQ(d)::S(A)
  - S(a);S_CUTQ(d)::P=Q
  - P(f);S_CUTQ(d)::QAR1(H)

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).