Meson Chess Problem Database

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Problem Display

PID: 202549 (Qb6/7K/1Bn3N1/2Pk1B2/2p3p1/6P1/1PN5/8 w - - 0 1)

Telkes, Imre

Nepszava, 1923

Qb6/7K/1Bn3N1/2Pk1B2/2p3p1/6P1/1PN5/8

#2

9 + 5

6490	yacpdb	2020

SOLUTION

SOUND
Sets
- 1...Bxg3
  - 2.Qg8#
- 1...Bf4
  - 2.Qg8#
- 1...Be5
  - 2.Se7#
  - 2.Qg8#
- 1...Bd6
  - 2.Qg8#
- 1...Ba7
  - 2.Qg8#
- 1...Bc7
  - 2.Qg8#
- 1...c3
  - 2.Qa2#
Tries
- 1.Kh6?
  - 1...Bxg3
    - 2.Qg8#
  - 1...c3
    - 2.Qa2#
  - 1...Be5
    - 2.Se7#
    - 2.Qg8#
  - 1...Bd6
    - 2.Qg8#
  - 1...Ba7
    - 2.Qg8#
  - 1...Bc7
    - 2.Qg8#
  - 1...Bf4+!
- 1.Kg7?
  - 1...Bxg3
    - 2.Qg8#
  - 1...c3
    - 2.Qa2#
  - 1...Bf4
    - 2.Qg8#
  - 1...Bd6
    - 2.Qg8#
  - 1...Ba7
    - 2.Qg8#
  - 1...Bc7
    - 2.Qg8#
  - 1...Be5+!
- 1.Kh8?
  - 1...Bxg3
    - 2.Qg8#
  - 1...c3
    - 2.Qa2#
  - 1...Bf4
    - 2.Qg8#
  - 1...Bd6
    - 2.Qg8#
  - 1...Ba7
    - 2.Qg8#
  - 1...Bc7
    - 2.Qg8#
  - 1...Be5+!
- 1.Qxb8?
  - threat
    - 2.Sf4#
    - 2.Qd6#
    - 2.Qg8#
  - 1...Sb4
    - 2.Se7#
    - 2.Qd6#
  - 1...Sd4
    - 2.Sb4#
    - 2.Se7#
    - 2.Qd6#
  - 1...Sa5
    - 2.Se7#
    - 2.Qd6#
  - 1...Se5
    - 2.Se7#
    - 2.Qd6#
  - 1...Sa7
    - 2.Se7#
    - 2.Qd6#
  - 1...Se7
    - 2.Sxe7#
    - 2.Qd6#
  - 1...Sd8
    - 2.Se7#
    - 2.Qd6#
  - 1...c3
    - 2.Qg8#
  - 1...Sxb8!
- 1.b4?
  - 1...Bxg3
    - 2.Qg8#
  - 1...c3
    - 2.Qa2#
  - 1...Bf4
    - 2.Qg8#
  - 1...Be5
    - 2.Se7#
    - 2.Qg8#
  - 1...Bd6
    - 2.Qg8#
  - 1...Ba7
    - 2.Qg8#
  - 1...Bc7
    - 2.Qg8#
  - 1...cxb4 ep!
Keys
- 1.Qa1!
  - threat
    - 2.Qh1#
  - 1...Sd4
    - 2.Sb4#
  - 1...Se5
    - 2.Se7#
  - 1...c3
    - 2.Qa2#

FEATURES

Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
Sets
- B(e);OGATE,XP(C)::QAB(I)
- B(e);OGATE::QAB(I)
- P(a);OGATEB::QAB(I)
Tries
- Try
  - K(H);P-FLIGHT
  - Vars
    - B(e);OGATE,XP(C)::QAB(I)
    - P(a);OGATEB::QAB(I)
    - B(e);OGATE::QAB(I)
  - Refutation
    - B(e);CHECK
- Try
  - K(H);P-FLIGHT
  - Vars
    - B(e);OGATE,XP(C)::QAB(I)
    - P(a);OGATEB::QAB(I)
    - B(e);OGATE::QAB(I)
  - Refutation
    - B(e);CHECK
- Try
  - K(H);P-FLIGHT
  - Vars
    - B(e);OGATE,XP(C)::QAB(I)
    - P(a);OGATEB::QAB(I)
    - B(e);OGATE::QAB(I)
  - Refutation
    - B(e);CHECK
- Try
  - Q(I);N_PINS(d),XB(e)
  - Threat
    - DUALS(3)
  - Vars
    - P(a);::QAB(I)
  - Refutation
    - S(d);XQ(I)
- Try
  - P(A);
  - Vars
    - B(e);OGATE,XP(C)::QAB(I)
    - P(a);OGATEB::QAB(I)
    - B(e);OGATE::QAB(I)
  - Refutation
    - P(a);EP,XP(A)
Actual
- Q(I);N_PINS(d)
- Threat
  - QAB(I)
- Vars
  - S(d);N_GUARD,SBLOCK::S(B)
  - S(d);N_GUARD,SBLOCK::S(G)
  - P(a);OGATEB::QAB(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).