Meson Chess Problem Database

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Problem Display

PID: 102530 (8/8/1pK1p3/1Pn1P1p1/2Q2bNp/2N2k1B/3p1P1P/3b2R1 w - - 0 1)

Hertmann, Sandor

Comm., L'Echiquier, 1930

8/8/1pK1p3/1Pn1P1p1/2Q2bNp/2N2k1B/3p1P1P/3b2R1

#2

10 + 9

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...Bc2
  - 2.Qe2#
- 1...Be2
  - 2.Qxe2#
- 1...Bb3
  - 2.Qe2#
- 1...Ba4
  - 2.Qe2#
- 1...Bxh2
  - 2.Bg2#
- 1...Be3
  - 2.Bg2#
- 1...Bg3
  - 2.Bg2#
- 1...Bxe5
  - 2.Bg2#
- 1...Sb3
  - 2.Qe4#
- 1...Sd3
  - 2.Qe4#
- 1...Sa4
  - 2.Qe4#
- 1...Se4
  - 2.Qxe4#
- 1...Sa6
  - 2.Qe4#
- 1...Sb7
  - 2.Qe4#
- 1...Sd7
  - 2.Qe4#
Tries
- 1.Bf1?
  - 1...Bxh2
    - 2.Bg2#
  - 1...Bxe5
    - 2.Bg2#
  - 1...Bc2
    - 2.Be2#
    - 2.Qe2#
  - 1...Be2
    - 2.Bxe2#
    - 2.Qxe2#
  - 1...Bb3
    - 2.Be2#
    - 2.Qe2#
  - 1...Ba4
    - 2.Be2#
    - 2.Qe2#
  - 1...Be3
    - 2.Bg2#
  - 1...Bg3
    - 2.Bg2#
  - 1...Sb3
    - 2.Qe4#
  - 1...Sd3
    - 2.Qe4#
  - 1...Sa4
    - 2.Qe4#
  - 1...Se4
    - 2.Qxe4#
  - 1...Sa6
    - 2.Qe4#
  - 1...Sb7
    - 2.Qe4#
  - 1...Sd7
    - 2.Qe4#
  - 1...h3!
- 1.Qd3+?
  - 1...Be3
    - 2.Qxe3#
  - 1...Sxd3!
- 1.Qd5+?
  - 1...Se4
    - 2.Qxe4#
  - 1...exd5!
Keys
- 1.Rf1!
  - 1...Bxh2
    - 2.Sxh2#
  - 1...Bxe5
    - 2.Sxe5#
  - 1...Bc2
    - 2.Qe2#
  - 1...Be2
    - 2.Qxe2#
  - 1...Bb3
    - 2.Qe2#
  - 1...Ba4
    - 2.Qe2#
  - 1...Be3
    - 2.fxe3#
  - 1...Bg3
    - 2.fxg3#
  - 1...Sb3
    - 2.Qe4#
  - 1...Sd3
    - 2.Qe4#
  - 1...Sa4
    - 2.Qe4#
  - 1...Se4
    - 2.Qxe4#
  - 1...Sa6
    - 2.Qe4#
  - 1...Sb7
    - 2.Qe4#
  - 1...Sd7
    - 2.Qe4#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- B(a);N_GUARD::QAB1(F)
- B(a);N_GUARD::QAB1(F),XB(a)
- B(a);N_GUARD,P_PINP(H)::QAB1(F)
- B(d);XP(C)::B(E)
- B(d);::B(E)
- B(d);XP(I)::B(E)
- S(f);N_GUARD::QAB1(F)
- S(f);N_GUARD::QAB1(F),XS(f)
Tries
- Try
  - B(E);
  - Vars
    - B(d);XP(C)::B(E)
    - B(d);XP(I)::B(E)
    - B(d);::B(E)
    - S(f);N_GUARD::QAB1(F)
    - S(f);N_GUARD::QAB1(F),XS(f)
  - Refutation
    - P(e);
- Try
  - Q(F);CHECK
  - Vars
    - B(d);N_GUARD,P_SPINB(d)::QAR1(F),XB(d)
  - Refutation
    - S(f);XQ(F)
- Try
  - Q(F);CHECK
  - Vars
    - S(f);N_GUARD,P_SPINS(f)::QAB1(F),XS(f)
  - Refutation
    - P(i);XQ(F)
Actual
- R(A);
- Vars
  - B(d);XP(C)::S(G),XB(d)
  - B(d);XP(I)::S(G),XB(d)
  - B(a);N_GUARD::QAB1(F)
  - B(a);N_GUARD::QAB1(F),XB(a)
  - B(a);N_GUARD,P_PINP(H)::QAB1(F)
  - B(d);OGATE::R(A)+P(B),XB(d)
  - S(f);N_GUARD::QAB1(F)
  - S(f);N_GUARD::QAB1(F),XS(f)

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).