MESON Chess Problem Database
Problem Display
PID: 2896 (8/8/2ppNNn1/2p2p2/Q7/2pk4/6p1/2BB1bK1 w - - 0 1)
Pirnie, Duncan
Source?, 1904
#2
6 + 9
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Be2
- 2.Bc2#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...c2
- 2.Qxc2#
- 2.Qb3#
- 1...c4
- 2.Qc2#
- 1...f4
- 2.Qe4#
- 1...d5
- 2.Sxc5#
- 1...Be2
- Tries
- 1.Se4?
- threat
- 2.Sf2#
- 1...c2
- 2.Qxc2#
- 1...fxe4!
- threat
- 1.Sg4?
- threat
- 2.Sf2#
- 1...c2
- 2.Qxc2#
- 1...fxg4!
- threat
- 1.Sh5?
- 1...c2
- 2.Qxc2#
- 1...c4
- 2.Qc2#
- 1...Be2
- 2.Bc2#
- 1...Sf4
- 2.Shxf4#
- 2.Sexf4#
- 1...Sh4
- 2.Shf4#
- 2.Sef4#
- 1...Se5
- 2.Shf4#
- 2.Sef4#
- 1...Se7
- 2.Shf4#
- 2.Sef4#
- 1...Sf8
- 2.Shf4#
- 2.Sef4#
- 1...Sh8
- 2.Shf4#
- 2.Sef4#
- 1...d5
- 2.Sxc5#
- 1...f4!
- 1...c2
- 1.Sd7?
- 1...c2
- 2.Qxc2#
- 1...c4
- 2.Qc2#
- 1...Be2
- 2.Bc2#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...d5
- 2.Sexc5#
- 2.Sdxc5#
- 1...f4!
- 1...c2
- 1.Sh7?
- 1...c2
- 2.Qxc2#
- 1...c4
- 2.Qc2#
- 1...Be2
- 2.Bc2#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...d5
- 2.Sxc5#
- 1...f4!
- 1...c2
- 1.Se8?
- 1...c2
- 2.Qxc2#
- 1...c4
- 2.Qc2#
- 1...Be2
- 2.Bc2#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...d5
- 2.Sxc5#
- 1...f4!
- 1...c2
- 1.Sg8?
- 1...c2
- 2.Qxc2#
- 1...c4
- 2.Qc2#
- 1...Be2
- 2.Bc2#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...d5
- 2.Sxc5#
- 1...f4!
- 1...c2
- 1.Bf3?
- 1...c2
- 2.Qb3#
- 1...f4
- 2.Qe4#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...c4
- 2.Qd1#
- 1...d5
- 2.Sxc5#
- 1...Be2!
- 1...c2
- 1.Bh5?
- 1...c2
- 2.Qb3#
- 1...f4
- 2.Qe4#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...c4
- 2.Qd1#
- 1...d5
- 2.Sxc5#
- 1...Be2!
- 1...c2
- 1.Qb5+?
- 1...c4
- 2.Qxf5#
- 1...cxb5!
- 1...c4
- 1.Se4?
- Keys
- 1.Bg4!
- 1...fxg4
- 2.Qe4#
- 1...c2
- 2.Qb3#
- 1...f4
- 2.Qe4#
- 1...Be2
- 2.Bxf5#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...c4
- 2.Qd1#
- 1...d5
- 2.Sxc5#
- 1...fxg4
- 1.Bg4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(a);SBLOCK::B(B)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(e);SBLOCK::QAB1(D)
- P(f);N_GUARD::QAB1(D)
- P(h);N_GUARD::S(E),XP(e)
- Tries
- Try
- S(F);
- Threat
- S(F)
- Vars
- P(c);::QAB1(D),XP(c)
- Refutation
- P(f);XS(F)
- Try
- S(F);
- Threat
- S(F)
- Vars
- P(c);::QAB1(D),XP(c)
- Refutation
- P(f);XS(F)
- Try
- S(F);
- Vars
- P(c);::QAB1(D),XP(c)
- P(e);SBLOCK::QAB1(D)
- B(a);SBLOCK::B(B)
- P(h);N_GUARD::S(E),XP(e)
- Refutation
- P(f);
- Try
- S(F);
- Vars
- P(c);::QAB1(D),XP(c)
- P(e);SBLOCK::QAB1(D)
- B(a);SBLOCK::B(B)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- Refutation
- P(f);
- Try
- S(F);
- Vars
- P(c);::QAB1(D),XP(c)
- P(e);SBLOCK::QAB1(D)
- B(a);SBLOCK::B(B)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(h);N_GUARD::S(E),XP(e)
- Refutation
- P(f);
- Try
- S(F);
- Vars
- P(c);::QAB1(D),XP(c)
- P(e);SBLOCK::QAB1(D)
- B(a);SBLOCK::B(B)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(h);N_GUARD::S(E),XP(e)
- Refutation
- P(f);
- Try
- S(F);
- Vars
- P(c);::QAB1(D),XP(c)
- P(e);SBLOCK::QAB1(D)
- B(a);SBLOCK::B(B)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(h);N_GUARD::S(E),XP(e)
- Refutation
- P(f);
- Try
- B(B);
- Vars
- P(c);OGATEB::QAR2(D)
- P(f);N_GUARD::QAB1(D)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(e);SBLOCK::QAR2(D)
- P(h);N_GUARD::S(E),XP(e)
- Refutation
- B(a);
- Try
- B(B);
- Vars
- P(c);OGATEB::QAR2(D)
- P(f);N_GUARD::QAB1(D)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(e);SBLOCK::QAR2(D)
- P(h);N_GUARD::S(E),XP(e)
- Refutation
- B(a);
- Try
- Q(D);CHECK
- Vars
- P(e);OGATE,P_SPINP(e),SBLOCK::QAB(D),XP(f)
- Refutation
- P(g);XQ(D)
- Try
- Actual
- B(B);
- Vars
- P(f);N_GUARD,XB(B)::QAB1(D)
- P(c);OGATEB::QAR2(D)
- P(f);N_GUARD::QAB1(D)
- B(a);SBLOCK::B(B),XP(f)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(e);SBLOCK::QAR2(D)
- P(h);N_GUARD::S(E),XP(e)
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).